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Pan Z, Zhu X, Liu Y, Yang L, Jiao M, Kang S, Luo J, Fu X, Lu W. Enhanced Light Absorption and Photo-Generated Charge Separation Efficiency for Boosting Photocatalytic H 2 Evolution through TiO 2 Quantum Dots with N-Doping and Concomitant Oxygen Vacancy. Small 2024:e2311861. [PMID: 38708808 DOI: 10.1002/smll.202311861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/18/2024] [Indexed: 05/07/2024]
Abstract
Low-range light absorption and rapid recombination of photo-generated charge carriers have prevented the occurrence of effective and applicable photocatalysis for decades. Quantum dots (QDs) offer a solution due to their size-controlled photon properties and charge separation capabilities. Herein, well-dispersed interstitial nitrogen-doped TiO2 QDs with stable oxygen vacancies (N-TiO2-x-VO) are fabricated by using a low-temperature, annealing-assisted hydrothermal method. Remarkably, electrostatic repulsion prevented aggregation arising from negative charges accumulated in situ on the surface of N-TiO2-x-VO, enabling complete solar spectrum utilization (200-800 nm) with a 2.5 eV bandgap. Enhanced UV-vis photocatalytic H2 evolution rate (HER) reached 2757 µmol g-1 h-1, 41.6 times higher than commercial TiO2 (66 µmol g-1 h-1). Strikingly, under visible light, HER rate was 189 µmol g-1 h-1. Experimental and simulated studies of mechanisms reveal that VO can serve as an electron reservoir of photo-generated charge carriers on N-doped active sites, and consequently, enhance the separation rate of exciton pairs. Moreover, the negative free energy (-0.35 V) indicates more favorable thermodynamics for HER as compared with bulk TiO2 (0.66 V). This research work paves a new way of developing efficient photocatalytic strategies of HER that are applicable in the sustainable carbon-zero energy supply.
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Affiliation(s)
- Ziwei Pan
- Chongqing School, University of Chinese Academy of Science (UCAS Chongqing), Chongqing, 400714, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Xi Zhu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Yuxin Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Long Yang
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China
| | - Mingyang Jiao
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
| | - Shuai Kang
- Chongqing School, University of Chinese Academy of Science (UCAS Chongqing), Chongqing, 400714, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Jinling Luo
- Chongqing School, University of Chinese Academy of Science (UCAS Chongqing), Chongqing, 400714, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Xie Fu
- Chongqing School, University of Chinese Academy of Science (UCAS Chongqing), Chongqing, 400714, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Wenqiang Lu
- Chongqing School, University of Chinese Academy of Science (UCAS Chongqing), Chongqing, 400714, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
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2
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Tang R, Aziz A, Yu W, Pan ZZ, Nishikawa G, Yoshii T, Nomura K, Taylor EE, Stadie NP, Inoue K, Kotani M, Kyotani T, Nishihara H. Prominent Structural Dependence of Quantum Capacitance Unraveled by Nitrogen-Doped Graphene Mesosponge. Small 2024; 20:e2308066. [PMID: 38057129 DOI: 10.1002/smll.202308066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/15/2023] [Indexed: 12/08/2023]
Abstract
Porous carbons are important electrode materials for supercapacitors. One of the challenges associated with supercapacitors is improving their energy density without relying on pseudocapacitance, which is based on fast redox reactions that often shorten device lifetimes. A possible solution involves achieving high total capacitance (Ctot), which comprises Helmholtz capacitance (CH) and possibly quantum capacitance (CQ), in high-surface carbon materials comprising minimally stacked graphene walls. In this work, a templating method is used to synthesize 3D mesoporous graphenes with largely identical pore structures (≈2100 m2 g-1 with an average pore size of ≈7 nm) but different concentrations of oxygen-containing functional groups (0.3-6.7 wt.%) and nitrogen dopants (0.1-4.5 wt.%). Thus, the impact of the heteroatom functionalities on Ctot is systematically investigated in an organic electrolyte excluding the effect of pore structures. It is found that heteroatom functionalities determine Ctot, resulting in the cyclic voltammetry curves being rectangular or butterfly-shaped. The nitrogen functionalities are found to significantly enhance Ctot owing to increased CQ.
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Affiliation(s)
- Rui Tang
- College of Materials Science and Engineering, Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha, 410082, China
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Alex Aziz
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
- International Research Fellow of Japan Society for the Promotion of Science (Postdoctoral Fellowships for Research in Japan), Tokyo, Japan
| | - Wei Yu
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Zheng-Ze Pan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Ginga Nishikawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Takeharu Yoshii
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Keita Nomura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Erin E Taylor
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana, 59717, USA
| | - Nicholas P Stadie
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana, 59717, USA
| | - Kazutoshi Inoue
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Motoko Kotani
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Takashi Kyotani
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Hirotomo Nishihara
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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Xing E, Cui R, Guo X, Liu J, Wang D, Chai Y, Wang X, Chen Y, Dong J, Sun B. In Situ Growth 3D GDY-NCNTs Nanocomposites for High-Performance Supercapacitors. ACS Appl Mater Interfaces 2024. [PMID: 38669604 DOI: 10.1021/acsami.4c02112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
New binary carbon composites (GDY-NCNTs and GDY-CNTs) with a three-dimensional porous structure, which are synthesized by an in situ growth method, are adopted in this article. The GDY-NCNTs composites exhibit excellent specific capacitance performance (679 F g-1, 2 mV s-1, 139% increase compared to GDY-CNTs) and good cycling stability (with a capacity retention rate of up to 116% after 10000 cycles). The three-dimensional porous structure not only promotes ion transfer and increases the effective specific surface area to improve its specific capacitance performance but also adapts to the volume expansion and contraction during the charging and discharging process to improve its cycling stability. The presence of nitrogen doping in the carbon nanotubes of GDY-NCNTs increases the surface defects of the composites, provides more electrochemical points, and improves the surface wettability of the composites, further improving the electrochemical performance of the composites.
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Affiliation(s)
- Enhao Xing
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Rongli Cui
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Xihong Guo
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Jiali Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Dongmei Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Yuru Chai
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Xue Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Yajing Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Jinquan Dong
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
| | - Baoyun Sun
- CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
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Chen G, Xie Y, Tang Y, Wang T, Wang Z, Yang C. Unraveling the Role of Metal Vacancy Sites and Doped Nitrogen in Enhancing Pseudocapacitance Performance of Defective MXene. Small 2024; 20:e2307408. [PMID: 37940624 DOI: 10.1002/smll.202307408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/20/2023] [Indexed: 11/10/2023]
Abstract
Nitrogen-doped titanium carbides (MXene) films exhibit extraordinary volumetric capacitance when high-concentration sulfuric acid electrolyte is utilized owing to the enhancement of pseudocapacitance. However, the energy storage mechanism of nitrogen-doped MXene is unclear due to the complex electrode structure and electrolyte ions' behavior. Here, based on pristine MXene (Ti3C2O2), three different MXene structures are constructed by introducing metal vacancy sites and doped nitrogen atoms, namely, defective MXene (Ti2.9C2O2), nitrogen-doped MXene (Ti3C2O1.9N0.1), and nitrogen-doped MXene with metal vacancy sites (Ti2.9C2O1.9N0.1). Then, the density functional theory (DFT)-based calculations coupled with the effective screening medium reference interaction site method (ESM-RISM) are applied to reveal the electrochemical behavior at the electrode/electrolyte interfacial area. Through analyzing the electronic structure, electrical double-layer capacitance (EDLC), and equilibrium potential of the pseudocapacitance reaction, the specific effect of structural changes on their performance can be clarified: metal vacancy sites can reduce the potential difference of gap layer (Outer Helmholtz plane) at charged state and increase the electronic capacity of Ti, which can be used to explain the high pseudocapacitance, low charge transfer resistance and high-rate capacity properties of nitrogen-doped MXene observed in experiments.
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Affiliation(s)
- Guanglei Chen
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 1 Dongxiang Road, Chang'an, Xi'an, Shaanxi, 710129, P. R. China
| | - Yangyang Xie
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 1 Dongxiang Road, Chang'an, Xi'an, Shaanxi, 710129, P. R. China
- Innovation Center NPU Chongqing, Northwestern Polytechnical University, Chongqing, 400000, P. R. China
| | - Yi Tang
- College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi, 710054, P. R. China
| | - Tianshuai Wang
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 1 Dongxiang Road, Chang'an, Xi'an, Shaanxi, 710129, P. R. China
| | - Zhenyu Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Chenhui Yang
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 1 Dongxiang Road, Chang'an, Xi'an, Shaanxi, 710129, P. R. China
- Innovation Center NPU Chongqing, Northwestern Polytechnical University, Chongqing, 400000, P. R. China
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Sun L, Liu Y, Xie J, Zhang F, Jiang R, Jin Z. Encapsulating Sulfur into a Gel-Derived Nitrogen-Doped Mesoporous and Microporous Carbon Sponge for High-Performance Lithium-Sulfur Batteries. ACS Appl Mater Interfaces 2024. [PMID: 38412035 DOI: 10.1021/acsami.3c15984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The practical application of Li-S batteries (LSBs) has long been impeded by the inefficient utilization of sulfur and slow kinetics. Utilizing conductive carbonaceous frameworks as a host scaffold presents an efficient and cost-effective approach to enhance sulfur utilization for redox reactions in LSBs. However, the interaction of pure carbon materials with lithium polysulfide intermediates (LiPSs) is limited to weak van der Waals forces. Hence, the development of an economical method for synthesizing heteroatom-doped carbon materials for sulfur fixation is of paramount importance. In this study, we introduce a hierarchical porous nitrogen-doped carbon sponge (NPCS) with an exceptionally high BET surface area of 3182.2 m2 g-1, achieved through a facile template-assisted polymerization method. The incorporation of inorganic salts, free radical polymerization, and deuteric freeze-drying techniques facilitates the formation of hierarchical pores within the NPCS. After sulfur fixation, the resulting S/NPCS electrode demonstrates remarkable electrochemical performance in LSBs. Specifically, it achieves an 80% sulfur utilization rate, maintains a high reversible specific capacity of 400 mA h g-1 even after 600 cycles at a demanding current density of 5.0 A g-1, and exhibits superior rate capability. It is believed that this work will inspire the rational design of cost-effective carbon-based electrodes for high-performance LSBs.
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Affiliation(s)
- Lin Sun
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Yanxiu Liu
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Jie Xie
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Feng Zhang
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Ruiyu Jiang
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China
- Key Laboratory of Inorganic Functional Materials and Intelligent Manufacturing of Shandong Province, CNBM Technology Innovation Academy, Zaozhuang 277116, China
| | - Zhong Jin
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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Chen Z, Zong Y, Chai Y, E M, He Y, Shi S, Cai J, Zhang Q, Li J, Chen J, Liu X, Wang ZJ, Wang D, Liu Z. Unraveling the Nanoscale Segregation Mechanism in N-Doped Niobium for Enhanced SRF Performance. Small Methods 2024:e2301319. [PMID: 38178653 DOI: 10.1002/smtd.202301319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/09/2023] [Indexed: 01/06/2024]
Abstract
The nitrogen doping (N-doping) treatment for niobium superconducting radio-frequency (SRF) cavities is one of the key enabling technologies that support the development of more efficient future large accelerators. However, the N-doping results have diverged due to a complex chemical profile under the nitrogen-doped surface. Particularly, under industrial-scale production conditions, it is difficult to understand the underlying mechanism thus hindering performance improvement. Herein, a combination of spatially resolved and surface-sensitive approaches is employed to establish the detailed near-surface phase composition of thermally processed niobium. The results show that intermediate phase segregations, particularly the nanometric carbon-rich phase, can impede the nitridation process and limit the interactions between nitrogen and the niobium sub-surface. In comparison, the removal of the carbon-rich layer at the Nb surface leads to enhanced nitrogen binding at the Nb surface. Combining the RF test results, it is shown that the complex uniformity and grain boundary penetrations of impurity elements have a direct correlation with the mid-field quench behavior in the N-doped Nb cavities. Therefore, proper control of the nanometric intermediate phase formation in discrete thermal steps is critical in improving the ultimate performance and production yield of the Nb cavities.
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Affiliation(s)
- Zhaoxi Chen
- Center for Transformative Science (CTS), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Yue Zong
- Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), No. 99 Haike Rd, Shanghai, 201210, China
| | - Yue Chai
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Mengzheng E
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Yulu He
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Shucheng Shi
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Jun Cai
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Qing Zhang
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Jun Li
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Jinfang Chen
- Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), No. 99 Haike Rd, Shanghai, 201210, China
| | - Xuerong Liu
- Center for Transformative Science (CTS), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Zhu-Jun Wang
- School of Physical Science and Technology (SPST), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
| | - Dong Wang
- Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), No. 99 Haike Rd, Shanghai, 201210, China
| | - Zhi Liu
- Center for Transformative Science (CTS), ShanghaiTech University, No. 393 Huaxia Rd, Shanghai, 201210, China
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Rong L, Wu L, Zhang T, Hu C, Tang H, Pan H, Zou X. Significant Differences in the Effects of Nitrogen Doping on Pristine Biochar and Graphene-like Biochar for the Adsorption of Tetracycline. Molecules 2023; 29:173. [PMID: 38202756 PMCID: PMC10779899 DOI: 10.3390/molecules29010173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/21/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024] Open
Abstract
To improve the adsorption efficiency of pollutants by biochar, preparing graphene-like biochar (GBC) or nitrogen-doped biochar are two commonly used methods. However, the difference in the nitrogen doping (N-doping) effects upon the adsorption of pollutants by pristine biochar (PBC) and GBC, as well as the underlying mechanisms, are still unclear. Take the tetracycline (TC) as an example, the present study analyzed the characteristics of the adsorption of TCs on biochars (PBC, GBC, N-PBC, N-GBC), and significant differences in the effects of N-doping on the adsorption of TCs by PBC and GBC were consistently observed at different solution properties. Specifically, N-doping had varied effects on the adsorption performance of PBC, whereas it uniformly improved the adsorption performance of GBC. To interpret the phenomenon, the N-doping upon the adsorption was revealed by the QSAR model, which indicated that the pore filling (VM) and the interactions between TCs with biochars (Ead-v) were found to be the most important two factors. Furthermore, the density functional theory (DFT) results demonstrated that N-doping slightly affects biochar's chemical reactivity. The van der Waals (vdWs) and electrostatic interactions are the main forces for TCs-biochars interactions. Moreover, N-doping mostly strengthened the electrostatic interactions of TCs-biochars, but the vdWs interactions of most samples remained largely unaffected. Overall, the revealed mechanism of N-doping on TCs adsorption by biochars will enhance our knowledge of antibiotic pollution remediation.
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Affiliation(s)
- Lingling Rong
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;
- School of Life Science, Jinggangshan University, 28 Xueyuan Road, Ji’an 343009, China; (T.Z.); (C.H.); (H.T.)
| | - Ligui Wu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
| | - Tiao Zhang
- School of Life Science, Jinggangshan University, 28 Xueyuan Road, Ji’an 343009, China; (T.Z.); (C.H.); (H.T.)
| | - Cui Hu
- School of Life Science, Jinggangshan University, 28 Xueyuan Road, Ji’an 343009, China; (T.Z.); (C.H.); (H.T.)
| | - Haihui Tang
- School of Life Science, Jinggangshan University, 28 Xueyuan Road, Ji’an 343009, China; (T.Z.); (C.H.); (H.T.)
| | - Hongcheng Pan
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;
| | - Xiaoming Zou
- School of Life Science, Jinggangshan University, 28 Xueyuan Road, Ji’an 343009, China; (T.Z.); (C.H.); (H.T.)
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Kim KW, Park B, Kim J, Seok H, Kim T, Jo C, Kim JK. Block Copolymer-Directed Facile Synthesis of N-Doped Mesoporous Graphitic Carbon for Reliable, High-Performance Zn Ion Hybrid Supercapacitor. ACS Appl Mater Interfaces 2023; 15:57905-57912. [PMID: 37040434 DOI: 10.1021/acsami.3c02791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Ordered mesoporous carbons (OMCs) are promising materials for cathode materials of a Zn ion hybrid capacitor (Zn HC) due to their high surface area and interconnected porous structure. Graphitization of the framework and nitrogen doping have been used to improve the energy storage performance of the OMCs by enhancing electrical conductivity, pseudocapacitive reaction sites, and surface affinity toward aqueous electrolytes. Thus, when both methods are simultaneously implemented to the OMCs, the Zn HC would have improved energy storage performance. Herein, we introduce a facile synthetic method for N-doped mesoporous graphitic carbon (N-mgc) by utilizing polystyrene-block-poly(2-vinlypyridine) copolymer (PS-b-P2VP) as both soft-template and carbon/nitrogen sources. Co-assembly of PS-b-P2VP with Ni precursors for graphitization formed a mesostructured composite, which was converted to N-doped graphitic carbon through catalytic pyrolysis. After selective removal of Ni, N-mgc was prepared. The obtained N-mgc exhibited interconnected mesoporous structure with high nitrogen content and high surface area. When N-mgc was employed as a cathode material in Zn ion HC, excellent energy storage performance was achieved: a high specific capacitance (43 F/g at 0.2 A/g), a high energy density of 19.4 Wh/kg at a power density of 180 W/kg, and reliable cycle stability (>3000 cycles).
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Affiliation(s)
- Keon-Woo Kim
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
| | - Bomi Park
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
| | - Jun Kim
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
| | - Hyunho Seok
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Taesung Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
- Department of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Changshin Jo
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
- Graduate Institute of Ferrous & Energy Materials Technology (GIFT), Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
| | - Jin Kon Kim
- National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
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Li J, Xia Z, Wang X, Feng C, Zhang Q, Chen X, Yang Y, Wang S, Jin H. Distinguished Roles of Nitrogen-Doped Sp 2 and Sp 3 Hybridized Carbon on Extraordinary Supercapacitance in Acidic Aqueous Electrolyte. Adv Mater 2023:e2310422. [PMID: 38102494 DOI: 10.1002/adma.202310422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/04/2023] [Indexed: 12/17/2023]
Abstract
The acidic aqueous supercapacitors have been found to deliver appealing capacitive properties due to fast ion diffusion caused by the applied smallest size of hydrion. However, their practical applications are largely inhibited by the narrow electrochemical stability window of water (1.23 V). Herein, A nitrogen-enriched porous carbon materials (RNOPCs) is reported, consisting of varied nitrogen doping bonded on sp2 and sp3 carbon sites, which are capable of stimulating a wider potential window up to 1.4 V and thus resulting in a great enhancement of capacitive performance in aqueous acidic electrolytes. Together with the improved electrical conductivity and preferable hydrion diffusion, RNOPCs exhibit an ultrahigh volumetric capacitance (1084 F cm-3 ) in 0.5 M H2 SO4 . Besides, a fully packed RNOPCs-based symmetrical supercapacitor can deliver a high gravimetric and volumetric energy density of 31.8 Wh Kg-1 and 54.3 Wh L-1 respectively, approaching those of lead acid batteries (25-35 Wh Kg-1 ). The first-principles calculations reveal that the lone pair electrons of the doped nitrogen can be delocalized on its neighboring carbon atoms, improving charge uptakes and overpotentials. Such facile and scale-up production of carbon-based supercapacitors can bridge the gap of energy density between traditional supercapacitors and batteries in aqueous electrolytes.
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Affiliation(s)
- Jun Li
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Zhenhai Xia
- Australian Carbon Materials Centre (A-CMC), School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Xiaowei Wang
- Department of Materials Science and Engineering, University of North Texas Denton, Denton, TX 76203, USA
| | - Cheng Feng
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Qingcheng Zhang
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Xi'an Chen
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Yun Yang
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Shun Wang
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Huile Jin
- Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
- Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, China
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10
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Mitiushev N, Kabachkov E, Laptinskiy K, Firsov A, Panin G, Baranov A. One-Stage Process of Reduction, Fluorination, and Doping with Nitrogen of Graphene Oxide Films. ACS Appl Mater Interfaces 2023. [PMID: 37922230 DOI: 10.1021/acsami.3c12567] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
The possibility of chemical modification of a graphene oxide film deposited on a Si/SiO2 substrate during a one-stage hydrothermal process in the presence of fluorine ions and reducing agents, such as ascorbic acid or hydrazine, is shown. The proposed technique makes it possible to obtain reduced fluorinated graphene nitride oxide (RGOFN) in the form of a thin film with a controlled composition of functional groups by changing the type and concentration of the reducing agent and then transferring the obtained films to any substrate. XPS and IR spectroscopy of the obtained films revealed controlled changes in the structure and composition of graphene oxide associated with the removal of oxygen groups and the incorporation of fluorine ions as well as the reduction of conjugated double bonds and the controlled incorporation of nitrogen into thin RGOFN films. The current-voltage characteristics of the fabricated RGOFN structures showed that their electrical properties are well controlled by doping with nitrogen during the proposed one-stage process.
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Affiliation(s)
- Nikita Mitiushev
- Department of Materials Science, Moscow State University, 119991 Moscow, Russia
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Moscow District, Chernogolovka 142432, Russia
| | - Eugene Kabachkov
- Institute of Solid State Physics, Moscow District, Chernogolovka 142432, Russia
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Academician Semenov Avenue 1, Moscow Region, Chernogolovka 142432, Russia
| | - Kirill Laptinskiy
- D.V. Skobeltsyn Research Institute of Nuclear Physics, Moscow State University, 119991 Moscow, Russia
| | - Anatoly Firsov
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Moscow District, Chernogolovka 142432, Russia
- Scientific Research Institute of System Analysis, Moscow 117218, Russia
| | - Gennady Panin
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Moscow District, Chernogolovka 142432, Russia
| | - Andrei Baranov
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Moscow District, Chernogolovka 142432, Russia
- Chemistry Department, Moscow State University, 119991 Moscow, Russia
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11
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Wei S, Li W, Ma Z, Deng X, Li Y, Wang X. Novel Bismuth Nanoflowers Encapsulated in N-Doped Carbon Frameworks as Superb Composite Anodes for High-Performance Sodium-Ion Batteries. Small 2023; 19:e2304265. [PMID: 37469204 DOI: 10.1002/smll.202304265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/02/2023] [Indexed: 07/21/2023]
Abstract
Bismuth (Bi) has attracted attention as a promising anode for sodium-ion batteries (SIBs) owing to its suitable potential and high theoretical capacity. However, the large volumetric changes during cycling leads to severe degradation of electrochemical performance and limits its practical application. Herein, Bi nanoflowers are encapsulated in N-doped carbon frameworks to construct a novel Bi@NC composite via a facile solvothermal method and carbonization strategy. The well-designed composite structure endows the Bi@NC with uniformly dispersed Bi nanoflowers to alleviate the attenuation while the N-doped carbon frameworks improve the conductivity and ion transport of the whole electrode. As for sodium-ion half-cell, the electrode exhibits a high specific capacity (384.8 mAh g-1 at 0.1 A g-1 ) and excellent rate performance (341.5 mAh g-1 at 10 A g-1 ), and the capacity retention rate still remains at 94.9% after 5000 cycles at 10 A g-1 . Furthermore, the assembled full-cell with Na3 V2 (PO4 )3 cathode and Bi@NC anode can deliver a high capacity of 251.5 mAh g-1 at 0.1 A g-1 , and its capacity attenuates only 0.009% in each cycle after 2000 times at 5.0 A g-1 . This work offers a convenient, low-cost, and eco-friendliness approach for high-performance electrodes in the field of sodium ion electrochemical storage technology.
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Affiliation(s)
- Shiwei Wei
- Laboratory of Advanced Materials and Energy Electrochemistry, Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Wei Li
- Laboratory of Advanced Materials and Energy Electrochemistry, Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Zizai Ma
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, 030024, China
- College of Chemistry, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Xiaoyang Deng
- Laboratory of Advanced Materials and Energy Electrochemistry, Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Yongfeng Li
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, China
| | - Xiaoguang Wang
- Laboratory of Advanced Materials and Energy Electrochemistry, Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, 030024, China
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12
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Chen R, Li X, Cai C, Fan H, Deng Y, Yu H, Mai L, Zhou L. Amine-Aldehyde Condensation-Derived N-Doped Hard Carbon Microspheres for High-Capacity and Robust Sodium Storage. Small 2023; 19:e2303790. [PMID: 37381642 DOI: 10.1002/smll.202303790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/11/2023] [Indexed: 06/30/2023]
Abstract
Hard carbon is generally accepted as the choice of anode material for sodium-ion batteries. However, integrating high capacity, high initial Coulombic efficiency (ICE), and good durability in hard carbon materials remains challenging. Herein, N-doped hard carbon microspheres (NHCMs) with abundant Na+ adsorption sites and tunable interlayer distance are constructed based on the amine-aldehyde condensation reaction using m-phenylenediamine and formaldehyde as the precursors. The optimized NHCM-1400 with a considerable N content (4.64%) demonstrates a high ICE (87%), high reversible capacity with ideal durability (399 mAh g-1 at 30 mA g-1 and 98.5% retention over 120 cycles), and decent rate capability (297 mAh g-1 at 2000 mA g-1 ). In situ characterizations elucidate the adsorption-intercalation-filling sodium storage mechanism of NHCMs. Theoretical calculation reveals that the N-doping decreases the Na+ adsorption energy on hard carbon.
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Affiliation(s)
- Ran Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Xinyuan Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Congcong Cai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Hao Fan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Yujie Deng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Huogen Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
- Hubei Longzhong Laboratory, Wuhan University of Technology (Xiangyang Demonstration Zone), Xiangyang, Hubei, 441000, P. R. China
| | - Liang Zhou
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
- Hubei Longzhong Laboratory, Wuhan University of Technology (Xiangyang Demonstration Zone), Xiangyang, Hubei, 441000, P. R. China
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13
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Gu Y, Du X, Hua F, Wen J, Li M, Tang T. Nitrogen-Doped Graphene Quantum Dot-Passivated δ-Phase CsPbI 3: A Water-Stable Photocatalytic Adjuvant to Degrade Rhodamine B. Molecules 2023; 28:7310. [PMID: 37959730 PMCID: PMC10650061 DOI: 10.3390/molecules28217310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 10/22/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
Inorganic halide perovskite CsPbI3 is highly promising in the photocatalytic field for its strong absorption of UV and visible light. Among the crystal phases of CsPbI3, the δ-phase as the most aqueous stability; however, directly using it in water is still not applicable, thus limiting its dye photodegradation applications in aqueous solutions. Via adopting nitrogen-doped graphene quantum dots (NGQDs) as surfactants to prepare δ-phase CsPbI3 nanocrystals, we obtained a water-stable material, NGQDs-CsPbI3. Such a material can be well dispersed in water for a month without obvious deterioration. High-resolution transmission electron microscopy and X-ray diffractometer characterizations showed that NGQDs-CsPbI3 is also a δ-phase CsPbI3 after NGQD coating. The ultraviolet-visible absorption spectra indicated that compared to δ-CsPbI3, NGQDs-CsPbI3 has an obvious absorption enhancement of visible light, especially near the wavelength around 521 nm. The good dispersity and improved visible-light absorption of NGQDs-CsPbI3 benefit their aqueous photocatalytic applications. NGQDs-CsPbI3 alone can photodegrade 67% rhodamine B (RhB) in water, while after compositing with TiO2, NGQDs-CsPbI3/TiO2 exhibits excellent visible-light photocatalytic ability, namely, it photodegraded 96% RhB in 4 h. The strong absorption of NGQDs-CsPbI3 in the visible region and effective transfer of photogenerated carriers from NGQDs-CsPbI3 to TiO2 play the key roles in dye photodegradation. We highlight NGQDs-CsPbI3 as a water-stable halide perovskite material and effective photocatalytic adjuvant.
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Affiliation(s)
| | | | | | | | - Ming Li
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China; (Y.G.); (X.D.); (F.H.); (J.W.)
| | - Tao Tang
- College of Science & Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Technology, Guilin 541004, China; (Y.G.); (X.D.); (F.H.); (J.W.)
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14
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Zhang Q, Wu M, Fang Y, Deng C, Shen HH, Tang Y, Wang Y. One-Pot Synthesis of Ultra-Small Pt Nanoparticles-Loaded Nitrogen-Doped Mesoporous Carbon Nanotube for Efficient Catalytic Reaction. Nanomaterials (Basel) 2023; 13:2633. [PMID: 37836274 PMCID: PMC10574567 DOI: 10.3390/nano13192633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023]
Abstract
In this study, Pt nanoparticles-loaded nitrogen-doped mesoporous carbon nanotube (Pt/NMCT) was successfully synthesized through a polydopamine-mediated "one-pot" co-deposition strategy. The Pt source was introduced during the co-deposition of polydopamine and silica on the surface of SiO2 nanowire (SiO2 NW), and Pt atoms were fixed in the skeleton by the chelation of polydopamine. Thus, in the subsequent calcination process in nitrogen atmosphere, the growth and agglomeration of Pt nanoparticles were effectively restricted, achieving the in situ loading of uniformly dispersed, ultra-small (~2 nm) Pt nanoparticles. The method is mild, convenient, and does not require additional surfactants, reducing agents, or stabilizers. At the same time, the use of the dual silica templates (SiO2 NW and the co-deposited silica nanoclusters) brought about a hierarchical pore structure with a high specific surface area (620 m2 g-1) and a large pore volume (1.46 cm3 g-1). The loading process of Pt was studied by analyzing the electron microscope and X-ray photoelectron spectroscopy of the intermediate products. The catalytic performance of Pt/NMCT was investigated in the reduction of 4-nitrophenol. The Pt/NMCT with a hierarchical pore structure had an apparent reaction rate constant of 0.184 min-1, significantly higher than that of the sample, without the removal of the silica templates to generate the hierarchical porosity (0.017 min-1). This work provides an outstanding contribution to the design of supported noble metal catalysts and also highlights the importance of the hierarchical pore structure for catalytic activity.
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Affiliation(s)
- Qian Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
| | - Minying Wu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
| | - Yuanyuan Fang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
| | - Chao Deng
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325027, China
| | - Hsin-Hui Shen
- Department of Materials Science and Engineering, Monash University, Clayton, VIC 3800, Australia
| | - Yi Tang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
| | - Yajun Wang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325027, China
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15
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Lorentzen AB, Bouatou M, Chacon C, Dappe YJ, Lagoute J, Brandbyge M. Quantum Transport in Large-Scale Patterned Nitrogen-Doped Graphene. Nanomaterials (Basel) 2023; 13:2556. [PMID: 37764585 PMCID: PMC10538011 DOI: 10.3390/nano13182556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/08/2023] [Accepted: 09/10/2023] [Indexed: 09/29/2023]
Abstract
It has recently been demonstrated how the nitrogen dopant concentration in graphene can be controlled spatially on the nano-meter scale using a molecular mask. This technique may be used to create ballistic electron optics-like structures of high/low doping regions; for example, to focus electron beams, harnessing the quantum wave nature of the electronic propagation. Here, we employ large-scale Greens function transport calculations based on a tight-binding approach. We first benchmark different tight-binding models of nitrogen in graphene with parameters based on density functional theory (DFT) and the virtual crystal approximation (VCA). Then, we study theoretically how the random distribution within the masked regions and the discreteness of the nitrogen scattering centers impact the transport behavior of sharp n-p and n-n' interfaces formed by different, realistic nitrogen concentrations. We investigate how constrictions for the current can be realized by patterned high/low doping regions with experimentally feasible nitrogen concentrations. The constrictions can guide the electronic current, while the quantized conductance is significantly washed out due to the nitrogen scattering. The implications for device design is that a p-n junction with nitrogen corrugation should still be viable for current focusing. Furthermore, a guiding channel with less nitrogen in the conducting canal preserves more features of quantized conductance and, therefore, its low-noise regime.
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Affiliation(s)
| | - Mehdi Bouatou
- Laboratoire Matériaux et Phénomènes Quantiques, CNRS-Université Paris Cité, 10 Rue Alice Domon et Léonie Duquet, CEDEX 13, 75205 Paris, France; (M.B.); (C.C.); (J.L.)
| | - Cyril Chacon
- Laboratoire Matériaux et Phénomènes Quantiques, CNRS-Université Paris Cité, 10 Rue Alice Domon et Léonie Duquet, CEDEX 13, 75205 Paris, France; (M.B.); (C.C.); (J.L.)
| | - Yannick J. Dappe
- SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay, CEDEX, 91191 Gif-sur-Yvette, France;
| | - Jérôme Lagoute
- Laboratoire Matériaux et Phénomènes Quantiques, CNRS-Université Paris Cité, 10 Rue Alice Domon et Léonie Duquet, CEDEX 13, 75205 Paris, France; (M.B.); (C.C.); (J.L.)
| | - Mads Brandbyge
- Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark;
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16
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Jiang J, Shen Q, Chen Z, Wang S. Nitrogen-Doped Porous Carbon Derived from Coal for High-Performance Dual-Carbon Lithium-Ion Capacitors. Nanomaterials (Basel) 2023; 13:2525. [PMID: 37764554 PMCID: PMC10536825 DOI: 10.3390/nano13182525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023]
Abstract
Lithium-ion capacitors (LICs) are emerging as one of the most advanced hybrid energy storage devices, however, their development is limited by the imbalance of the dynamics and capacity between the anode and cathode electrodes. Herein, anthracite was proposed as the raw material to prepare coal-based, nitrogen-doped porous carbon materials (CNPCs), together with being employed as a cathode and anode used for dual-carbon lithium-ion capacitors (DC-LICs). The prepared CNPCs exhibited a folded carbon nanosheet structure and the pores could be well regulated by changing the additional amount of g-C3N4, showing a high conductivity, abundant heteroatoms, and a large specific surface area. As expected, the optimized CNPCs (CTK-1.0) delivered a superior lithium storage capacity, which exhibited a high specific capacity of 750 mAh g-1 and maintained an excellent capacity retention rate of 97% after 800 cycles. Furthermore, DC-LICs (CTK-1.0//CTK-1.0) were assembled using the CTK-1.0 as both cathode and anode electrodes to match well in terms of internal kinetics and capacity simultaneously, which displayed a maximum energy density of 137.6 Wh kg-1 and a protracted lifetime of 3000 cycles. This work demonstrates the great potential of coal-based carbon materials for electrochemical energy storage devices and also provides a new way for the high value-added utilization of coal materials.
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Affiliation(s)
- Jiangmin Jiang
- Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Qianqian Shen
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ziyu Chen
- Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Shijing Wang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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17
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Zahra KM, Byrne C, Li Z, Hazeldine K, Walton AS. Oxide-mediated nitrogen doping of CVD graphene and their subsequent thermal stability. Nanotechnology 2023; 34. [PMID: 37549665 DOI: 10.1088/1361-6528/acedb5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
Heteroatom doping of graphene is a promising approach for tailoring its chemical and electronic properties-a prerequisite for many applications such as sensing, catalysis, and energy storage. Doping chemical vapour deposition (CVD) graphene with nitrogen during growth (in situdoping) is a common strategy, but it produces a distribution of inequivalent dopant sites and requires substantial modifications to the CVD growth process. In this study, we demonstrate a novel and simple oxide-mediated approach to introduce nitrogen dopants into pre-existing CVD graphene (ex situdoping) which achieves comparable doping densities toin situdoping methodologies. Furthermore, we demonstrate that thermal annealing of N-doped graphene can selectively remove pyridinic, retaining graphitic and pyrrolic nitrogen dopants, offering an attractive route to further modify graphene functionality. The methodologies we present are simple and scalable to precisely tailor graphene properties without the need to alter CVD growth protocols.
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Affiliation(s)
- Khadisha M Zahra
- Depatrment of Chemistry and Photon Science Institute, University of Manchester, United Kingdom
| | - Conor Byrne
- Depatrment of Chemistry and Photon Science Institute, University of Manchester, United Kingdom
| | - Zheshen Li
- ISA, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Kerry Hazeldine
- Depatrment of Chemistry and Photon Science Institute, University of Manchester, United Kingdom
| | - Alex S Walton
- Depatrment of Chemistry and Photon Science Institute, University of Manchester, United Kingdom
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18
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Wang M, Zhang S, Teng J, Zhao S, Li Z, Wu M. Combination of Mn-Mo Oxide Nanoparticles on Carbon Nanotubes through Nitrogen Doping to Catalyze Oxygen Reduction. Molecules 2023; 28:5544. [PMID: 37513416 PMCID: PMC10383102 DOI: 10.3390/molecules28145544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/17/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
An efficient and low-cost oxygen catalyst for the oxygen reduction reaction (ORR) was developed by in situ growth of Mn-Mo oxide nanoparticles on nitrogen-doped carbon nanotubes (NCNTs). Doped nitrogen effectively increases the electron conductivity of the MnMoO4@NCNT complex and the binding energy between the Mn-Mo oxide nanoparticles and carbon nanotubes (CNTs), leading to fast charge transfer and more catalytically active sites. Combining Mn and Mo with NCNTs improves the catalytic activity and promotes both electron and mass transfers, greatly enhancing the catalytic ability for ORR. As a result, MnMoO4@NCNT exhibited a comparable half-wave potential to commercial Pt/C and superior durability, demonstrating great potential for application in renewable energy conversion systems.
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Affiliation(s)
- Min Wang
- State Key Laboratory of Heavy Oil Processing, School of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
- College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Shilin Zhang
- State Key Laboratory of Heavy Oil Processing, School of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Juejin Teng
- State Key Laboratory of Heavy Oil Processing, School of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Shunsheng Zhao
- State Key Laboratory of Heavy Oil Processing, School of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Zhongtao Li
- State Key Laboratory of Heavy Oil Processing, School of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Mingbo Wu
- State Key Laboratory of Heavy Oil Processing, School of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
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19
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Kumar Y, Akula S, Kibena-Põldsepp E, Käärik M, Kozlova J, Kikas A, Aruväli J, Kisand V, Leis J, Tamm A, Tammeveski K. Cobalt Phthalocyanine-Doped Polymer-Based Electrocatalyst for Rechargeable Zinc-Air Batteries. Materials (Basel) 2023; 16:5105. [PMID: 37512381 PMCID: PMC10386096 DOI: 10.3390/ma16145105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023]
Abstract
Rechargeable zinc-air batteries (RZAB) have gained significant attention as potential energy storage devices due to their high energy density, cost-effectiveness, and to the fact that they are environmentally safe. However, the practical implementation of RZABs has been impeded by challenges such as sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), including poor cyclability. Herein, we report the preparation of cobalt- and nitrogen-doped porous carbon derived from phloroglucinol-formaldehyde polymer networks with 2-methyl imidazole and cobalt phthalocyanine as precursors for nitrogen and cobalt. The CoN-PC-2 catalyst prepared in this study exhibits commendable electrocatalytic activity for both ORR and OER, evidenced by a half-wave potential of 0.81 V and Ej=10 of 1.70 V. Moreover, the catalyst demonstrates outstanding performance in zinc-air batteries, achieving a peak power density of 158 mW cm-2 and displaying excellent stability during charge-discharge cycles. The findings from this study aim to provide valuable insights and guidelines for further research and the development of hierarchical micro-mesoporous carbon materials from polymer networks, facilitating their potential commercialisation and widespread deployment in energy storage applications.
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Affiliation(s)
- Yogesh Kumar
- Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
| | - Srinu Akula
- Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
| | | | - Maike Käärik
- Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
| | | | - Arvo Kikas
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Jaan Aruväli
- Institute of Ecology and Earth Science, University of Tartu, 50409 Tartu, Estonia
| | - Vambola Kisand
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Jaan Leis
- Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
| | - Aile Tamm
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Kaido Tammeveski
- Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
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20
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Kaur N, Tiwari P, Kumar P, Biswas M, Sonawane A, Mobin SM. Multifaceted Carbon Dots: toward pH-Responsive Delivery of 5-Fluorouracil for In Vitro Antiproliferative Activity. ACS Appl Bio Mater 2023. [PMID: 37366546 DOI: 10.1021/acsabm.3c00228] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
The synthesis of smart hybrid material to assimilate diagnosis and treatment is crucial in nanomedicine. Herein, we present a simple and facile method to synthesize multitalented blue-emissive nitrogen-doped carbon dots N@PEGCDs. The as-prepared carbon dots N@PEGCDs show enhanced biocompatibility, small size, high fluorescence, and high quantum yield. The N@PEGCDs are used as a drug carrier for 5-fluorouracil (5-FU) with more release at acidic pH. Furthermore, the mode of action of drug-loaded CD (5FU-N@PEGCDs) has also been explored by performing wound healing assay, DCFDA assay for ROS generation, and Hoechst staining. The drug loaded with carbon dots showed less toxicity to normal cells compared to cancer cells, making it a perfect candidate to be studied for designing next-generation drug delivery systems.
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Affiliation(s)
- Navpreet Kaur
- Discipline of Biosciences and Bio-Medical Engineering, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
| | - Pranav Tiwari
- Discipline of Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
| | - Pawan Kumar
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
| | - Mainak Biswas
- School of Biotechnology, KIIT Deemed to be University, Bhubaneswar 751024, Odisha, India
| | - Avinash Sonawane
- Discipline of Biosciences and Bio-Medical Engineering, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
| | - Shaikh M Mobin
- Discipline of Biosciences and Bio-Medical Engineering, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
- Discipline of Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
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21
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Liao Y, Shang Z, Ju G, Wang D, Yang Q, Wang Y, Yuan S. Biomass Derived N-Doped Porous Carbon Made from Reed Straw for an Enhanced Supercapacitor. Molecules 2023; 28:4633. [PMID: 37375187 DOI: 10.3390/molecules28124633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/04/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Developing advanced carbon materials by utilizing biomass waste has attracted much attention. However, porous carbon electrodes based on the electronic-double-layer-capacitor (EDLC) charge storage mechanism generally presents unsatisfactory capacitance and energy density. Herein, an N-doped carbon material (RSM-0.33-550) was prepared by directly pyrolyzing reed straw and melamine. The micro- and meso-porous structure and the rich active nitrogen functional group offered more ion transfer and faradaic capacitance. X-ray diffraction (XRD), Raman, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) measurements were used to characterize the biomass-derived carbon materials. The prepared RSM-0.33-550 possessed an N content of 6.02% and a specific surface area of 547.1 m2 g-1. Compared with the RSM-0-550 without melamine addition, the RSM-0.33-550 possessed a higher content of active nitrogen (pyridinic-N) in the carbon network, thus presenting an increased number of active sites for charge storage. As the anode for supercapacitors (SCs) in 6 M KOH, RSM-0.33-550 exhibited a capacitance of 202.8 F g-1 at a current density of 1 A g-1. At a higher current density of 20 A g-1, it still retained a capacitance of 158 F g-1. Notably, it delivered excellent stability with capacity retention of 96.3% at 20 A g-1 after 5000 cycles. This work not only offers a new electrode material for SCs, but also gives a new insight into rationally utilizing biomass waste for energy storage.
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Affiliation(s)
- Yuyi Liao
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Zhongtao Shang
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Guangrui Ju
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Dingke Wang
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Qiao Yang
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Yuan Wang
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Shaojun Yuan
- Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
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22
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Liu Y, Liu X, Zhang G, Shi X, Zhang P, Fan Y, Huang Y, Zhang R. "Carbon in Metal" Anode with High Processability for Sodium Metal Batteries. ACS Appl Mater Interfaces 2023. [PMID: 37246628 DOI: 10.1021/acsami.3c03056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Sodium metal batteries are ideal candidates for next-generation grid-level energy storage systems. However, severe obstacles pertain with regard to the usage of metallic Na, including poor processability, dendrite growth, and violent side reactions. Herein, we design a "carbon in metal" anode (denoted as CiM) via a facile method by rolling a controllable amount of mesoporous carbon powder into the Na metal. The as-designed composite anode is endowed with dramatically lowered stickiness and increased hardness (3 times higher than that of pure Na metal) and strength along with improved processability, which can be fabricated into foils with varied patterns and limited thickness (down to 100 μm). Besides, nitrogen-doped mesoporous carbon, which can increase the sodiophilicity, is applied to fabricate N-doped carbon in the metal anode (denoted as N-CiM), which can effectively facilitate the diffusion of Na+ ions and decrease the depositing overpotential, consequently homogenizing the Na+-ion flow and rendering a dense and flat Na deposition. Therefore, the N-CiM anode offers enhanced cycling stability for 800 h at 1 mAh cm-2 in symmetric cells and 1000 cycles with a high average Coulomb efficiency (CE) (99.8%) in full cells based on the conventional carbonate electrolyte.
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Affiliation(s)
- Yukun Liu
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Xuyang Liu
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Guohua Zhang
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Xinyue Shi
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Ping Zhang
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Yuxin Fan
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Yunhui Huang
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Renyuan Zhang
- Institute of New Energy for Vehicles, Shanghai Key Laboratory of Development & Application for Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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23
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Sedlovets DM. N-Doped Graphene-like Film/Silicon Structures as Micro-Capacitor Electrodes. Materials (Basel) 2023; 16:ma16114007. [PMID: 37297139 DOI: 10.3390/ma16114007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/21/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023]
Abstract
Currently, the miniaturization of portable and autonomous devices is challenging for modern electronics. Graphene-based materials have recently emerged as one of the ideal candidates for supercapacitor electrodes, while Si is a common platform for direct component-on-chip integration. We have proposed the direct liquid-based CVD of N-doped graphene-like films (N-GLFs) on Si as a promising way to achieve solid-state on-chip micro-capacitor performance. Synthesis temperatures in the range from 800 °C to 1000 °C are investigated. Capacitances and electrochemical stability of the films are evaluated using cyclic voltammetry, as well as galvanostatic measurements and electrochemical impedance spectroscopy in 0.5 M Na2SO4. We have shown that N-doping is an efficient way to improve the N-GLF capacitance. 900 °C is the optimal temperature for the N-GLF synthesis with the best electrochemical properties. The capacitance rises with increasing film thickness which also has an optimum (about 50 nm). The transfer-free acetonitrile-based CVD on Si yields a perfect material for microcapacitor electrodes. Our best value of the area-normalized capacitance (960 mF/cm2) exceeds the world's achievements among thin graphene-based films. The main advantages of the proposed approach are the direct on-chip performance of the energy storage component and high cyclic stability.
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Affiliation(s)
- Daria M Sedlovets
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Science (IMT RAS), Moscow District, 6 Academician Ossipyan Str., 142432 Chernogolovka, Russia
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24
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Raghavan A, Radhakrishnan M, Soren K, Wadnerkar P, Kumar A, Chakravarty S, Ghosh S. Biological Evaluation of Graphene Quantum Dots and Nitrogen-Doped Graphene Quantum Dots as Neurotrophic Agents. ACS Appl Bio Mater 2023. [PMID: 37167607 DOI: 10.1021/acsabm.3c00099] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Over time, developments in nano-biomedical research have led to the creation of a number of systems to cure serious illnesses. Tandem use of nano-theragnostics such as diagnostic and therapeutic approaches tailored to the individual disease treatment is crucial for further development in the field of biomedical advancements. Graphene has garnered attention in the recent times as a potential nanomaterial for tissue engineering and regenerative medicines owing to its biocompatibility among the several other unique properties it possesses. The zero-dimensional graphene quantum dots (GQDs) and their nitrogen-doped variant, nitrogen-doped GQDs (N-GQDs), have good biocompatibility, and optical and physicochemical properties. GQDs have been extensively researched owing to several factors such as their size, surface charge, and interactions with other molecules found in biological media. This work briefly elucidates the potential of electroactive GQDs as well as N-GQDs as neurotrophic agents. In vitro investigations employing the N2A cell line were used to evaluate the effectiveness of GQDs and N-GQDs as neurotrophic agents, wherein basic investigations such as SRB assay and neurite outgrowth assay were performed. The results inferred from immunohistochemistry followed by confocal imaging studies as well as quantitative real-time PCR (qPCR) studies corroborated those obtained from neurite outgrowth assay. We have also conducted a preliminary investigation of the pattern of gene expression for neurotrophic and gliotrophic growth factors using ex vivo neuronal and mixed glial cultures taken from the brains of postnatal day 2 mice pups. Overall, the studies indicated that GQDs and N-GQDs hold prospect as a framework for further development of neuroactive compounds for relevant central nervous system (CNS) purposes.
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Affiliation(s)
- Akshaya Raghavan
- Polymers & Functional Materials Division, CSIR─Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Mydhili Radhakrishnan
- Applied Biology Division, CSIR─Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kalyani Soren
- Applied Biology Division, CSIR─Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | | | - Arvind Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- CSIR─Centre for Cellular and Molecular Biology, Hyderabad 500007, India
| | - Sumana Chakravarty
- Applied Biology Division, CSIR─Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sutapa Ghosh
- Polymers & Functional Materials Division, CSIR─Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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25
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Cai L, Zhang Y, Ma R, Feng X, Yan L, Jia D, Xu M, Ai L, Guo N, Wang L. Nitrogen-Doped Hierarchical Porous Carbon Derived from Coal for High-Performance Supercapacitor. Molecules 2023; 28:molecules28093660. [PMID: 37175070 PMCID: PMC10180139 DOI: 10.3390/molecules28093660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 04/16/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023] Open
Abstract
The surface properties and the hierarchical pore structure of carbon materials are important for their actual application in supercapacitors. It is important to pursue an integrated approach that is both easy and cost-effective but also challenging. Herein, coal-based hierarchical porous carbon with nitrogen doping was prepared by a simple dual template strategy using coal as the carbon precursor. The hierarchical pores were controlled by incorporating different target templates. Thanks to high conductivity, large electrochemically active surface area (483 m2 g-1), hierarchical porousness with appropriate micro-/mesoporous channels, and high surface nitrogen content (5.34%), the resulting porous carbon exhibits a high specific capacitance in a three-electrode system using KOH electrolytes, reaching 302 F g-1 at 1 A g-1 and 230 F g-1 at 50 A g-1 with a retention rate of 76%. At 250 W kg-1, the symmetrical supercapacitor assembled at 6 M KOH shows a high energy density of 8.3 Wh kg-1, and the stability of the cycling is smooth. The energy density of the symmetric supercapacitor assembled under ionic liquids was further increased to 48.3 Wh kg-1 with a power output of 750 W kg-1 when the operating voltage was increased to 3 V. This work expands the application of coal-based carbon materials in capacitive energy storage.
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Affiliation(s)
- Leiming Cai
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Yanzhe Zhang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Rui Ma
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Xia Feng
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Lihua Yan
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Dianzeng Jia
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Mengjiao Xu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Lili Ai
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Nannan Guo
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
| | - Luxiang Wang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
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26
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Olla C, Cappai A, Porcu S, Stagi L, Fantauzzi M, Casula MF, Mocci F, Corpino R, Chiriu D, Ricci PC, Carbonaro CM. Exploring the Impact of Nitrogen Doping on the Optical Properties of Carbon Dots Synthesized from Citric Acid. Nanomaterials (Basel) 2023; 13:1344. [PMID: 37110929 PMCID: PMC10141696 DOI: 10.3390/nano13081344] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/07/2023] [Accepted: 04/09/2023] [Indexed: 06/19/2023]
Abstract
The differences between bare carbon dots (CDs) and nitrogen-doped CDs synthesized from citric acid as a precursor are investigated, aiming at understanding the mechanisms of emission and the role of the doping atoms in shaping the optical properties. Despite their appealing emissive features, the origin of the peculiar excitation-dependent luminescence in doped CDs is still debated and intensively being examined. This study focuses on the identification of intrinsic and extrinsic emissive centers by using a multi-technique experimental approach and computational chemistry simulations. As compared to bare CDs, nitrogen doping causes the decrease in the relative content of O-containing functional groups and the formation of both N-related molecular and surface centers that enhance the quantum yield of the material. The optical analysis suggests that the main emission in undoped nanoparticles comes from low-efficient blue centers bonded to the carbogenic core, eventually with surface-attached carbonyl groups, the contribution in the green range being possibly related to larger aromatic domains. On the other hand, the emission features of N-doped CDs are mainly due to the presence of N-related molecules, with the computed absorption transitions calling for imidic rings fused to the carbogenic core as the potential structures for the emission in the green range.
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Affiliation(s)
- Chiara Olla
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Antonio Cappai
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Stefania Porcu
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Luigi Stagi
- Laboratory of Materials Science and Nanotechnology, CR-INSTM, Department of Chemical, Physics, Mathematics and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Marzia Fantauzzi
- Department of Chemistry and Geological Science, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Maria Francesca Casula
- Department of Mechanical, Chemical, and Materials Engineering, CINSA and INSTM, University of Cagliari, Via Marengo 2, I-09123 Cagliari, Italy
| | - Francesca Mocci
- Department of Chemistry and Geological Science, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Riccardo Corpino
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Daniele Chiriu
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Pier Carlo Ricci
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
| | - Carlo Maria Carbonaro
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
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27
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Zhang J, Zhang X, Xu C, Liu Y, Xu J, Miao Z, Yu H, Yan L, Zhang L, Shu J. Dual synergistic effects assisting Cu-SeS 2 electrochemistry for energy storage. Proc Natl Acad Sci U S A 2023; 120:e2220792120. [PMID: 36940321 PMCID: PMC10068761 DOI: 10.1073/pnas.2220792120] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/27/2023] [Indexed: 03/22/2023] Open
Abstract
Selenium sulfide (SeS2) features higher electronic conductivity than sulfur and higher theoretical capacity and lower cost than selenium, attracting considerable interest in energy storage field. Although nonaqueous Li/Na/K-SeS2 batteries are attractive for their high energy density, the notorious shuttle effect of polysulfides/polyselenides and the intrinsic limitations of organic electrolyte have hindered the deployment of this technology. To circumvent these issues, here we design an aqueous Cu-SeS2 battery by encapsulating SeS2 in a defect-enriched nitrogen-doped porous carbon monolith. Except the intrinsic synergistic effect between Se and S in SeS2, the porous structure of carbon matrix has sufficient internal voids to buffer the volume change of SeS2 and provides abundant pathways for both electrons and ions. In addition, the synergistic effect of nitrogen doping and topological defect not only enhances the chemical affinity between reactants and carbon matrix but also offers catalytic active sites for electrochemical reactions. Benefiting from these merits, the Cu-SeS2 battery delivers superior initial reversible capacity of 1,905.1 mAh g-1 at 0.2 A g-1 and outstanding long-span cycling performance over 1,000 cycles at 5 A g-1. This work applies variable valence charge carriers to aqueous metal-SeS2 batteries, providing valuable inspiration for the construction of metal-chalcogen batteries.
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Affiliation(s)
- Junwei Zhang
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Xikun Zhang
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Chiwei Xu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Yiwen Liu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Jiaxi Xu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Zhonghao Miao
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Haoxiang Yu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Lei Yan
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Liyuan Zhang
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
| | - Jie Shu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang315211, China
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28
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Wang F, Yu Z, Shi K, Li X, Lu K, Huang W, Yu C, Yang K. One-Pot Synthesis of N-Doped NiO for Enhanced Photocatalytic CO 2 Reduction with Efficient Charge Transfer. Molecules 2023; 28:molecules28062435. [PMID: 36985406 PMCID: PMC10057620 DOI: 10.3390/molecules28062435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/04/2023] [Accepted: 03/05/2023] [Indexed: 03/30/2023] Open
Abstract
The green and clean sunlight-driven catalytic conversion of CO2 into high-value-added chemicals can simultaneously solve the greenhouse effect and energy problems. The controllable preparation of semiconductor catalyst materials and the study of refined structures are of great significance for the in-depth understanding of solar-energy-conversion technology. In this study, we prepared nitrogen-doped NiO semiconductors using a one-pot molten-salt method. The research shows that the molten-salt system made NiO change from p-type to n-type. In addition, nitrogen doping enhanced the adsorption of CO2 on NiO and increased the separation of photogenerated carriers on the NiO. It synergistically optimized the CO2-reduction system and achieved highly active and selective CO2 photoreduction. The CO yield on the optimal nitrogen-doped photocatalyst was 235 μmol·g-1·h-1 (selectivity 98%), which was 16.8 times that of the p-type NiO and 2.4 times that of the n-type NiO. This can be attributed to the fact that the nitrogen doping enhanced the oxygen vacancies of the NiOs and their ability to adsorb and activate CO2 molecules. Photoelectrochemical characterization also confirmed that the nitrogen-doped NiO had excellent electron -transfer and separation properties. This study provides a reference for improving NiO-based semiconductors for photocatalytic CO2 reduction.
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Affiliation(s)
- Fulin Wang
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Zhenzhen Yu
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Kaiyang Shi
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Xiangwei Li
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Kangqiang Lu
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Weiya Huang
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Changlin Yu
- School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Kai Yang
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
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Zhang Q, Deng C, Huang Z, Zhang Q, Chai X, Yi D, Fang Y, Wu M, Wang X, Tang Y, Wang Y. Dual-Silica Template-Mediated Synthesis of Nitrogen-Doped Mesoporous Carbon Nanotubes for Supercapacitor Applications. Small 2023; 19:e2205725. [PMID: 36585360 DOI: 10.1002/smll.202205725] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/30/2022] [Indexed: 06/17/2023]
Abstract
1D carbon nanotubes have been widely applied in many fields, such as catalysis, sensing and energy storage. However, the long tunnel-like pores and relatively low specific surface area of carbon nanotubes often restrict their performance in certain applications. Herein, a dual-silica template-mediated method to prepare nitrogen-doped mesoporous carbon nanotubes (NMCTs) through co-depositing polydopamine (both carbon and nitrogen precursors) and silica nanoparticles (the porogen for mesopore formation) on a silica nanowire template is proposed. The obtained NMCTs have a hierarchical pore structure of large open mesopores and tubular macropores, a high specific surface area (1037 m2 g-1 ), and homogeneous nitrogen doping. The NMCT-45 (prepared at an interval time of 45 min) shows excellent performance in supercapacitor applications with a high capacitance (373.6 F g-1 at 1.0 A g-1 ), excellent rate capability, high energy density (11.6 W h kg-1 at a power density of 313 W kg-1 ), and outstanding cycling stability (98.2% capacity retention after 10 000 cycles at 10 A g-1 ). Owing to the unique tubular morphology, hierarchical porosity and homogeneous N-doping, the NMCT also has tremendous potential in electrochemical catalysis and sensing applications.
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Affiliation(s)
- Qian Zhang
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Chao Deng
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Zaimei Huang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Qingcheng Zhang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Xiaocheng Chai
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Deliang Yi
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Yuanyuan Fang
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Minying Wu
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Xingdong Wang
- CSIRO Manufacturing, Private Bag 10, Clayton South, Victoria, 3169, Australia
| | - Yi Tang
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Yajun Wang
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325027, P. R. China
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Li Z, Feng Y, Qu X, Yang Y, Dong L, Lei T, Ren S. Impact of Different Lignin Sources on Nitrogen-Doped Porous Carbon toward the Electrocatalytic Oxygen Reduction Reaction. Int J Environ Res Public Health 2023; 20:4383. [PMID: 36901394 PMCID: PMC10002350 DOI: 10.3390/ijerph20054383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/27/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Lignin is an ideal carbon source material, and lignin-based carbon materials have been widely used in electrochemical energy storage, catalysis, and other fields. To investigate the effects of different lignin sources on the performance of electrocatalytic oxygen reduction, different lignin-based nitrogen-doped porous carbon catalysts were prepared using enzymolytic lignin (EL), alkaline lignin (AL) and dealkaline lignin (DL) as carbon sources and melamine as a nitrogen source. The surface functional groups and thermal degradation properties of the three lignin samples were characterized, and the specific surface area, pore distribution, crystal structure, defect degree, N content, and configuration of the prepared carbon-based catalysts were also analyzed. The electrocatalytic results showed that the electrocatalytic oxygen reduction performance of the three lignin-based carbon catalysts was different, and the catalytic performance of N-DLC was poor, while the electrocatalytic performance of N-ELC was similar to that of N-ALC, both of which were excellent. The half-wave potential (E1/2) of N-ELC was 0.82 V, reaching more than 95% of the catalytic performance of commercial Pt/C (E1/2 = 0.86 V) and proving that EL can be used as an excellent carbon-based electrocatalyst material, similar to AL.
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Affiliation(s)
- Zheng Li
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
| | - Yuwei Feng
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
| | - Xia Qu
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
| | - Yantao Yang
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou 213164, China
| | - Lili Dong
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou 213164, China
| | - Tingzhou Lei
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou 213164, China
| | - Suxia Ren
- Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou 213164, China
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31
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Yan L, Liu Y, Hou J. High-Efficiency Oxygen Reduction Reaction Revived from Walnut Shell. Molecules 2023; 28. [PMID: 36903323 DOI: 10.3390/molecules28052072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/04/2023] [Accepted: 02/09/2023] [Indexed: 02/25/2023] Open
Abstract
The development of inexpensive and efficient electrocatalysts for oxygen reduction reactions (ORR) remains a challenge with respect to renewable energy technologies. In this research, a porous, nitrogen-doped ORR catalyst is prepared using the hydrothermal method and pyrolysis with walnut shell as a biomass precursor and urea as a nitrogen source. Unlike past research, in this study, urea is not directly doped; instead, a new type of doping is carried out after annealing at 550 °C. In addition, the sample's morphology and structure are analyzed and characterized by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). A CHI 760E electrochemical workstation is used to test NSCL-900's performance in terms of oxygen reduction electrocatalysis (ORR). It has been found that the catalytic performance of NSCL-900 is significantly improved compared with that of NS-900 without urea doping. In a 0.1 mol/L KOH electrolyte, the half-wave potential can reach 0.86 V (vs. RHE) and the initial potential is 1.00 V (vs. RHE). The catalytic process is close to four-electron transfer and there are large quantities of pyridine nitrogen and pyrrole nitrogen.
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Korobova A, Gromov N, Medvedeva T, Lisitsyn A, Kibis L, Stonkus O, Sobolev V, Podyacheva O. Ru Catalysts Supported on Bamboo-like N-Doped Carbon Nanotubes: Activity and Stability in Oxidizing and Reducing Environment. Materials (Basel) 2023; 16:1465. [PMID: 36837095 PMCID: PMC9964624 DOI: 10.3390/ma16041465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/27/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
The catalysts with platinum-group metals on nanostructured carbons have been a very active field of research, but the studies were mainly limited to Pt and Pd. Here, Ru catalysts based on nitrogen-doped carbon nanotubes (N-CNTs) have been prepared and thoroughly characterized; Ru loading was kept constant (3 wt.%), while the degree of N-doping was varied (from 0 to 4.8 at.%) to evaluate its influence on the state of supported metal. Using the N-CNTs afforded ultrafine Ru particles (<2 nm) and allowed a portion of Ru to be stabilized in an atomic state. The presence of Ru single atoms in Ru/N-CNTs expectedly increased catalytic activity and selectivity in the formic acid decomposition (FAD) but had no effect in catalytic wet air oxidation (CWAO) of phenol, thus arguing against a key role of single-atom catalysis in the latter case. A remarkable difference between these two reactions was also found in regard to catalyst stability. In the course of FAD, no changes in the support or supported species or reaction rate were observed even at a high temperature (150 °C). In CWAO, although 100% conversions were still achievable in repeated runs, the oxidizing environment caused partial destruction of N-CNTs and progressive deactivation of the Ru surface by carbonaceous deposits. These findings add important new knowledge about the properties and applicability of Ru@C nanosystems.
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Rahman MO, Nor NBM, Sawaran Singh NS, Sikiru S, Dennis JO, Shukur MFBA, Junaid M, Abro GEM, Siddiqui MA, Al-Amin M. One-Step Solvothermal Synthesis by Ethylene Glycol to Produce N-rGO for Supercapacitor Applications. Nanomaterials (Basel) 2023; 13:666. [PMID: 36839033 PMCID: PMC9960698 DOI: 10.3390/nano13040666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/20/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Graphene and its derivatives have emerged as peerless electrode materials for energy storage applications due to their exclusive electroactive properties such as high chemical stability, wettability, high electrical conductivity, and high specific surface area. However, electrodes from graphene-based composites are still facing some substantial challenges to meet current energy demands. Here, we applied one-pot facile solvothermal synthesis to produce nitrogen-doped reduced graphene oxide (N-rGO) nanoparticles using an organic solvent, ethylene glycol (EG), and introduced its application in supercapacitors. Electrochemical analysis was conducted to assess the performance using a multi-channel electrochemical workstation. The N-rGO-based electrode demonstrates the highest specific capacitance of 420 F g-1 at 1 A g-1 current density in 3 M KOH electrolyte with the value of energy (28.60 Whkg-1) and power (460 Wkg-1) densities. Furthermore, a high capacitance retention of 98.5% after 3000 charge/discharge cycles was recorded at 10 A g-1. This one-pot facile solvothermal synthetic process is expected to be an efficient technique to design electrodes rationally for next-generation supercapacitors.
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Affiliation(s)
- Mohammad Obaidur Rahman
- Department of Electrical & Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Nursyarizal Bin Mohd Nor
- Department of Electrical & Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Narinderjit Singh Sawaran Singh
- Faculty of Data Science and Information Technology (FDSIT), INTI International University, Persiaran Perdana BBN, Putra Nilai, Nilai 71800, Negeri Sembilan, Malaysia
| | - Surajudeen Sikiru
- Centre for Subsurface Imaging, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - John Ojur Dennis
- Department of Fundamental & Applied Science, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
- Centre of Innovative Nanostructure and Nanodevices (COINN), Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Muhammad Fadhlullah bin Abd. Shukur
- Department of Fundamental & Applied Science, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
- Centre of Innovative Nanostructure and Nanodevices (COINN), Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Muhammad Junaid
- Department of Electrical & Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
- Department of Electronic Engineering, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta 87300, Balochistan, Pakistan
| | - Ghulam E. Mustafa Abro
- Department of Electrical & Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Muhammad Aadil Siddiqui
- Department of Electrical & Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Md Al-Amin
- The University of Queensland, St Lucia, QLD 4072, Australia
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Wei J, Sun J, Xu D, Shi L, Wang M, Li B, Song X, Zhang S, Zhang H. Preparation and Electrochemical Performance of Bio-Oil-Derived Hydrochar as a Supercapacitor Electrode Material. Int J Environ Res Public Health 2023; 20:1355. [PMID: 36674109 PMCID: PMC9858659 DOI: 10.3390/ijerph20021355] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
The rapid consumption of fossil energy and the urgent demand for sustainable development have significantly promoted worldwide efforts to explore new technology for energy conversion and storage. Carbon-based supercapacitors have received increasing attention. The use of biomass and waste as a carbon precursor is environmentally friendly and economical. In this study, hydrothermal pretreatment was used to synthetize coke from bio-oil, which can create a honeycomb-like structure that is advantageous for electrolyte transport. Furthermore, hydrothermal pretreatment, which is low in temperature, can create a low graphitization degree which can make heteroatom introduction and activation easier. Then, urea and KOH were used for doping and activation, which can improve conductivity and capacitance. Compared with no heteroatom and activation hydrothermal char (HC) (58.3 F/g at 1 A/g), the prepared carbon material nitrogen doping activated hydrothermal carbon (NAHC1) had a good electrochemical performance of 225.4 F/g at 1 A/g. The specific capacitance of the prepared NAHC1 was improved by 3.8 times compared with that of HC.
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Affiliation(s)
- Juntao Wei
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Jiawei Sun
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Deliang Xu
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Lei Shi
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Miao Wang
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Bin Li
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xudong Song
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Shu Zhang
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Hong Zhang
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
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Zhang W, Xie S, Wang S, Zhao P, Yang X, Huang P, Liu P, Cheng F. Nonmetallic Nitrogen-Doped MnO 2 as Highly Efficient Oxygen Electrocatalyst for Rechargeable Zinc-Air Batteries. Chemistry 2022; 29:e202203787. [PMID: 36585826 DOI: 10.1002/chem.202203787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Zinc-air batteries (ZABs) have been considered as one of the most promising energy storage devices to solve the problem of energy crisis and environmental pollution. In this work, we reported the synthesis of nitrogen-doped MnO2 (N-MnO2 ) to replace the noble metal electrocatalysts for air cathode in ZABs. The doped N atoms here introduced more Mn3+ and oxygen vacancies for MnO2 , enhancing charge transfer property and accelerating surface intermediate product during the oxygen reduction reaction (ORR). Hence, the best N-MnO2 achieved remarkable electrocatalytic activities towards ORR (half-wave potential of 0.797 V vs. RHE), and reversible oxygen overpotential of around 0.842 V, which is better than or comparable to the Pt/C and Mn-based catalysts reported recently. Moreover, the homemade ZABs based on N-MnO2 showed the maximum power density of 132.8 mW cm-2 and excellent cyclic stability.
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Affiliation(s)
- Wenlong Zhang
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Shilei Xie
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Shoushan Wang
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Peng Zhao
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Xiaoman Yang
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Peng Huang
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Peng Liu
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Faliang Cheng
- Guangdong Engineering and Technology, Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
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36
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Yin H, Gao X, Liu J, Chen P. Synthesis of N-Doped Few-Layer Graphene through Shock-Induced Carbon Fixation from CO 2. Nanomaterials (Basel) 2022; 13:109. [PMID: 36616019 PMCID: PMC9824553 DOI: 10.3390/nano13010109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
In this study, graphene and N-doped graphene nanosheets were synthesized through the shock-induced reduction of CO2 using a cylindrical shock-loading apparatus. The mixture of solid CO2 and Mg powder was filled in the pre-cooled sample tube and then impacted by a shock-driven cylindrical flyer tube. The impact generated a shockwave that propagated into the mixed precursor, inducing a chemical reaction between CO2 and Mg at a high shock pressure and high shock temperature. The recovered black powders were characterized via various techniques, confirming the presences of few-layer graphene. The mechanism is carefully shown to be that CO2 was reduced by Mg to form few-layer graphene under shock-induced high pressure and high temperature. By adding carbamide as an N source, this synthetic route was also applied to synthesize N-doped graphene nanosheets. Moreover, the yield and mass of the graphene materials in this study are up to 40% and 0.5 g, respectively. This study showed an efficient and easy-to-scale-up route to prepare few-layer graphene and N-doped few-layer graphene through shock synthesis.
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Affiliation(s)
- Hao Yin
- Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 612900, China
| | - Xin Gao
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250307, China
| | - Jianjun Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Pengwan Chen
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250307, China
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37
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Tanabe Y, Ito Y, Sugawara K, Jeong S, Ohto T, Nishiuchi T, Kawada N, Kimura S, Aleman CF, Takahashi T, Kotani M, Chen M. Coexistence of Urbach-Tail-Like Localized States and Metallic Conduction Channels in Nitrogen-Doped 3D Curved Graphene. Adv Mater 2022; 34:e2205986. [PMID: 36208073 DOI: 10.1002/adma.202205986] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen (N) doping is one of the most effective approaches to tailor the chemical and physical properties of graphene. By the interplay between N dopants and 3D curvature of graphene lattices, N-doped 3D graphene displays superior performance in electrocatalysis and solar-energy harvesting for energy and environmental applications. However, the electrical transport properties and the electronic states, which are the key factors to understand the origins of the N-doping effect in 3D graphene, are still missing. The electronic properties of N-doped 3D graphene are systematically investigated by an electric-double-layer transistor method. It is demonstrated that Urbach-tail-like localized states are located around the neutral point of N-doped 3D graphene with the background metallic transport channels. The dual nature of electronic states, generated by the synergistic effect of N dopants and 3D curvature of graphene, can be the electronic origin of the high electrocatalysis, enhanced molecular adsorption, and light absorption of N-doped 3D graphene.
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Affiliation(s)
- Yoichi Tanabe
- Department of Applied Science, Okayama University of Science, Okayama, 700-0005, Japan
| | - Yoshikazu Ito
- Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
| | - Katsuaki Sugawara
- Department of Physics, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
- Center for Spintronics Research Network, Tohoku University, Sendai, 980-8577, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Tokyo, 102-0076, Japan
| | - Samuel Jeong
- Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
| | - Tatsuhiko Ohto
- Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, 560-8531, Japan
| | - Tomohiko Nishiuchi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Naoaki Kawada
- Department of Applied Science, Okayama University of Science, Okayama, 700-0005, Japan
| | - Shojiro Kimura
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
| | | | - Takashi Takahashi
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - Motoko Kotani
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
- Mathematical Institute, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
| | - Mingwei Chen
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
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Jing Z, Guo W, Yu H, Qi S, Tao X, Qiao Y, Zhang W, Li X, Dong H. A new approach to simultaneously reducing, nitrogen doping and noble metal coating of graphene oxide via active-screen plasma. Nanotechnology 2022; 34:055702. [PMID: 36317242 DOI: 10.1088/1361-6528/ac9e06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
Graphene is widely used for various applications, especially after nitrogen doping and incorporation with metal nanoparticles. Herein, a simultaneous approach to reducing, nitrogen doping and noble metals coating of graphene oxide (GO) is reported using an advanced active-screen plasma (ASP) technique. With a noble metal plate added as an extra lid of active screen cage, the corresponding noble metal, mainly or fully in pure metal state, depending on the noble metal type, as well as a minority of Fe and Cr, is deposited on GO with simultaneous reduction and nitrogen doping. The ASP treated GO exhibits varying levels of improvement in electrical property depending on the type of noble metal nanoparticles hybridized with. Specifically, ASP treated GO incorporated with Pt or Au revealed 2-4 orders of magnitude of improvement in electrical property.
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Affiliation(s)
- Zhiyuan Jing
- School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Weiling Guo
- National Key Laboratory for Remanufacturing, Beijing, 100072, People's Republic of China
| | - Helong Yu
- National Key Laboratory for Remanufacturing, Beijing, 100072, People's Republic of China
| | - Shaojun Qi
- School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Xiao Tao
- School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Yulin Qiao
- National Engineering Research Center for Mechanical Product Remanufacturing, Beijing 100072, People's Republic of China
| | - Wei Zhang
- School of Mechatronic Engineering and Automation, Foshan University, Foshan Guangdong 528231, People's Republic of China
| | - Xiaoying Li
- School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Hanshan Dong
- School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom
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Telychko M, Noori K, Biswas H, Dulal D, Chen Z, Lyu P, Li J, Tsai HZ, Fang H, Qiu Z, Yap ZW, Watanabe K, Taniguchi T, Wu J, Loh KP, Crommie MF, Rodin A, Lu J. Gate-Tunable Resonance State and Screening Effects for Proton-Like Atomic Charge in Graphene. Nano Lett 2022; 22:8422-8429. [PMID: 36214509 DOI: 10.1021/acs.nanolett.2c02235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The ability to create a robust and well-defined artificial atomic charge in graphene and understand its carrier-dependent electronic properties represents an important goal toward the development of graphene-based quantum devices. Herein, we devise a new pathway toward the atomically precise embodiment of point charges into a graphene lattice by posterior (N) ion implantation into a back-gated graphene device. The N dopant behaves as an in-plane proton-like charge manifested by formation of the characteristic resonance state in the conduction band. Scanning tunneling spectroscopy measurements at varied charge carrier densities reveal a giant energetic renormalization of the resonance state up to 220 meV with respect to the Dirac point, accompanied by the observation of gate-tunable long-range screening effects close to individual N dopants. Joint density functional theory and tight-binding calculations with modified perturbation potential corroborate experimental findings and highlight the short-range character of N-induced perturbation.
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Affiliation(s)
- Mykola Telychko
- Department of Chemistry, National University of Singapore, 117543, Singapore
| | - Keian Noori
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, 117543, Singapore
| | - Hillol Biswas
- Centre for Advanced 2D Materials, National University of Singapore, 117543, Singapore
- Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore
| | - Dikshant Dulal
- Yale-NUS College, 16 College Avenue West, 138527, Singapore
| | - Zhaolong Chen
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore
| | - Pin Lyu
- Department of Chemistry, National University of Singapore, 117543, Singapore
| | - Jing Li
- Centre for Advanced 2D Materials, National University of Singapore, 117543, Singapore
| | - Hsin-Zon Tsai
- Department of Physics, University of California, Berkeley94720, California, United States
| | - Hanyan Fang
- Department of Chemistry, National University of Singapore, 117543, Singapore
| | - Zhizhan Qiu
- Department of Chemistry, National University of Singapore, 117543, Singapore
| | - Zhun Wai Yap
- Yale-NUS College, 16 College Avenue West, 138527, Singapore
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba305-0044, Japan
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba305-0044, Japan
| | - Jing Wu
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 08-03, 2 Fusionopolis Way, Singapore138634, Singapore
| | - Kian Ping Loh
- Department of Chemistry, National University of Singapore, 117543, Singapore
| | - Michael F Crommie
- Department of Physics, University of California, Berkeley94720, California, United States
| | - Aleksandr Rodin
- Centre for Advanced 2D Materials, National University of Singapore, 117543, Singapore
- Yale-NUS College, 16 College Avenue West, 138527, Singapore
| | - Jiong Lu
- Department of Chemistry, National University of Singapore, 117543, Singapore
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, 117543, Singapore
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Tian XH, Zhou TY, Meng Y, Zhao YM, Shi C, Hou PX, Zhang LL, Liu C, Cheng HM. A Flexible NO 2 Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen. Molecules 2022; 27:6523. [PMID: 36235060 DOI: 10.3390/molecules27196523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/25/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
Abstract
Carbon nanotubes (CNTs) are considered a promising candidate for the detection of toxic gases because of their high specific surface area and excellent electrical and mechanical properties. However, the detecting performance of CNT-based detectors needs to be improved because covalently bonded CNTs are usually chemically inert. We prepared a nitrogen-doped single-wall CNT (SWCNT) film by means of gas-phase fluorination followed by thermal annealing in NH3. The doped nitrogen content could be changed in the range of 2.9–9.9 at%. The N-doped SWCNT films were directly used to construct flexible and transparent gas sensors, which can work at a low voltage of 0.01 V. It was found that their NO2 detection performance was closely related to their nitrogen content. With an optimum nitrogen content of 9.8 at%, a flexible sensor had a detection limit of 500 ppb at room temperature with good cycling ability and stability during bending.
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Kim D, Kim J, Kim S. Enhancement of Resistive and Synaptic Characteristics in Tantalum Oxide-Based RRAM by Nitrogen Doping. Nanomaterials (Basel) 2022; 12:3334. [PMID: 36234461 PMCID: PMC9565720 DOI: 10.3390/nano12193334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/18/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Resistive random-access memory (RRAM) for neuromorphic systems has received significant attention because of its advantages, such as low power consumption, high-density structure, and high-speed switching. However, variability occurs because of the stochastic nature of conductive filaments (CFs), producing inaccurate results in neuromorphic systems. In this article, we fabricated nitrogen-doped tantalum oxide (TaOx:N)-based resistive switching (RS) memory. The TaOx:N-based device significantly enhanced the RS characteristics compared with a TaOx-based device in terms of resistance variability. It achieved lower device-to-device variability in both low-resistance state (LRS) and high-resistance state (HRS), 8.7% and 48.3% rather than undoped device of 35% and 60.7%. Furthermore, the N-doped device showed a centralized set distribution with a 9.4% variability, while the undoped device exhibited a wider distribution with a 17.2% variability. Concerning pulse endurance, nitrogen doping prevented durability from being degraded. Finally, for synaptic properties, the potentiation and depression of the TaOx:N-based device exhibited a more stable cycle-to-cycle variability of 4.9%, compared with only 13.7% for the TaOx-based device. The proposed nitrogen-doped device is more suitable for neuromorphic systems because, unlike the undoped device, uniformity of conductance can be obtained.
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Han X, Zhao F, Shang Q, Zhao J, Zhong X, Zhang J. Effect of Nitrogen Atom Introduction on the Photocatalytic Hydrogen Evolution Activity of Covalent Triazine Frameworks: Experimental and Theoretical Study. ChemSusChem 2022; 15:e202200828. [PMID: 35869028 DOI: 10.1002/cssc.202200828] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 07/22/2022] [Indexed: 06/15/2023]
Abstract
The construction of high-performance photocatalyst has always been explored. Covalent organic frameworks (COFs), especially keto-amine-linked COFs, have many advantages, such as adjustable bandgaps, π-π stacking structure, excellent response ability to visible light, high specific surface area, high mobility of carrier carriers, good physical and chemical stability, and so on, showing strong potential applications in photocatalytic solar energy conversion and hydrogen production. Two analogous covalent triazine frameworks (CTFs), T3H-CTF and T3N-CTF, have been synthesized via Schiff-base condensation reactions between 2,4,6-trihydroxybenzene-1,3,5-tricarbalehyde (MOP) and the corresponding triazine-based aromatic amines under solvothermal condition. For T3N-CTF, the peripheral aromatic linker to the central triazine unit was the pyridine unit, instead of the benzene unit in the T3H-CTF unit. T3N-CTF had a hydrogen production rate (HPR) of 6485.05 μmol g-1 h-1 , much higher than that of T3H-CTF (2028.06 μmol g-1 h-1 ). Accordingly, T3N-CTF had a much higher apparent quantum yield (AQY) of 12.2 % than that of T3H-CTF (4.12 %) at 405 nm. The experimental and theoretical results showed that the extended light absorption range, enlarged surface area, and enhanced separation and transportation efficiencies of charge carriers of T3N-CTF compared with T3H-CTF were uniformly induced by the introduction of peripheral nitrogen atoms into the skeleton of former CTF, which eventually boosted the visible-light induced hydrogen evolution reaction (HER). The work suggests a new method for enhancing the intrinsic HER activity by modulating the electronic features of the conjugated COFs by the introduction of pyridinic N atoms.
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Affiliation(s)
- Xiao Han
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China
| | - Fei Zhao
- College of Chemistry and Chemical Engineering, Taishan University, Taian, 271000, P. R. China
| | - Qianqian Shang
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China
| | - Jinsheng Zhao
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China
| | - Xiujuan Zhong
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China
| | - Junhong Zhang
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China
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Wang Q, Zhong T, Wang Z. Plasma-Engineered N-CoO x Nanowire Array as a Bifunctional Electrode for Supercapacitor and Electrocatalysis. Nanomaterials (Basel) 2022; 12:nano12172984. [PMID: 36080021 PMCID: PMC9457654 DOI: 10.3390/nano12172984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 08/25/2022] [Accepted: 08/27/2022] [Indexed: 06/02/2023]
Abstract
Surface engineering has achieved great success in enhancing the electrochemical activity of Co3O4. However, the previously reported methods always involve high-temperature calcination processes which are prone to induce agglomeration of the nanostructure, leading to the attenuation of performance. In this work, Co3O4 nanowires were successfully modified by a low-temperature NH3/Ar plasma treatment, which simultaneously generated a porous structure and efficient nitrogen doping with no agglomeration. The modified N-CoOx electrode exhibited remarkable performance due to the synergistic effect of the porous structure and nitrogen doping, which provided additional active sites for faradic transitions and improved charge transfer characteristics. The electrode achieved excellent supercapacitive performance with a maximum specific capacitance of 2862 mF/cm2 and superior cycling retention. Furthermore, the assembled asymmetric supercapacitor (N-CoOx//AC) device exhibited an extended potential window of 1.5 V, a maximum specific energy of 80.5 Wh/kg, and a maximum specific power of 25.4 kW/kg with 91% capacity retention after 5000 charge-discharge cycles. Moreover, boosted hydrogen evolution reaction performance was also confirmed by the low overpotential (126 mV) and long-term stability. This work enlightens prospective research on the plasma-enhanced surface engineering strategies.
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Wang X, Zhang F, Hu F, Li Y, Chen Y, Wang H, Min Z, Zhang R. N-Doped Honeycomb-like Ag@N-Ti 3C 2T x Foam for Electromagnetic Interference Shielding. Nanomaterials (Basel) 2022; 12:2967. [PMID: 36080005 PMCID: PMC9457588 DOI: 10.3390/nano12172967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/17/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
To solve the pollution problem of electromagnetic waves, new electromagnetic shielding materials should meet the requirements of being lightweight with high electrical conductivity. In this work, the combination of silver (Ag) nanoparticles and nitrogen doping (N-doping) was expected to tune the electromagnetic and physical properties of Ti3C2Tx MXene, and the Ag@N-Ti3C2Tx composites were fabricated through the hydrothermal reactions. The nitrogen doped (N-doped) Ag@Ti3C2Tx composites showed a hollow structure with a pore size of 5 μm. The influence of N-doped degrees on the electromagnetic interference (EMI) shielding performance was investigated over 8-18 GHz. Therefore, the controlled N-doping composites exhibited reflection-based EMI shielding performance due to the electrical conductivity and the special three-dimensional (3D) honeycomb-like structure. The achieved average EMI shielding values were 52.38 dB at the X-band and 72.72 dB at the Ku-band. Overall, the Ag@N-Ti3C2Tx foam, due to its special 3D honeycomb-like structure, not only meets the characteristics of light weight, but also exhibits ultra-high-efficiency EMI shielding performance, revealing great prospects in the application of electromagnetic wave shielding field.
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Affiliation(s)
- Xiaohan Wang
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Fan Zhang
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- Henan Vocational College of Information and Statistics, Zhengzhou 450008, China
| | - Feiyue Hu
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yaya Li
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yongqiang Chen
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Hailong Wang
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Zhiyu Min
- School of Material Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471026, China
| | - Rui Zhang
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Material Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471026, China
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45
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Wang Y, Shi C, Sha J, Ma L, Liu E, Zhao N. Single-Atom Cobalt Supported on Nitrogen-Doped Three-Dimensional Carbon Facilitating Polysulfide Conversion in Lithium-Sulfur Batteries. ACS Appl Mater Interfaces 2022; 14:25337-25347. [PMID: 35605282 DOI: 10.1021/acsami.2c02713] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Single-atom catalysts (SACs) have demonstrated catalytic efficacy toward lithium polysulfide conversion in Li-S batteries. However, achieving high-density M-Nx sites with rational design by a simple method is still challenging to date. Herein, an ultrathin porous 3D carbon-supported single-atom catalyst (SACo/NDC) is synthesized with a salt-template strategy via a facile freeze-drying and one-step pyrolysis procedure and serves well as a sulfur host. The well-defined 3D carbon structure can effectively alleviate volume stress and confine polysulfides inside. Moreover, the dispersed Co-Nx sites exhibit strong chemical adsorption function and valid catalytic efficiency to LiPSs redox conversion. As a result, the SACo/NDC cathodes display enhanced long-term cycling stability and better rate capability.
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Affiliation(s)
- Yichen Wang
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Chunsheng Shi
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Junwei Sha
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Liying Ma
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Enzuo Liu
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
- Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin 300072, China
| | - Naiqin Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
- Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin 300072, China
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Andrade ÓR, Rodríguez V, Camarillo R, Martínez F, Jiménez C, Rincón J. Photocatalytic Reduction of CO 2 with N-Doped TiO 2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis. Nanomaterials (Basel) 2022; 12:1793. [PMID: 35683653 DOI: 10.3390/nano12111793] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 01/28/2023]
Abstract
The objective of this work was to analyze the effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles. Thus, N-doped TiO2 and two types of composites, N-doped TiO2/CNT and N-doped TiO2/rGO, were prepared by a new environmentally friendly one-pot method. CNT and rGO were used as supports, triethylamine and urea as N doping agents, and titanium (IV) tetraisopropoxide and ethanol as Ti precursor and hydrolysis agent, respectively. The as-prepared photocatalysts exhibited enhanced photocatalytic performance compared to TiO2 P25 commercial catalyst during the photoreduction of CO2 with water vapor. It was imputed to the synergistic effect of N doping (reduction of semiconductor band gap energy) and carbon support (enlarging e−-h+ recombination time). The activity and selectivity of catalysts varied depending on the investigated material. Thus, whereas N-doped TiO2 nanoparticles led to a gaseous mixture, where CH4 formed the majority compared to CO, N-doped TiO2/CNT and N-doped TiO2/rGO composites almost exclusively generated CO. Regarding the activity of the catalysts, the highest production rates of CO (8 µmol/gTiO2/h) and CH4 (4 µmol/gTiO2/h) were achieved with composite N1/TiO2/rGO and N1/TiO2 nanoparticles, respectively, where superscript represents the ratio mg N/g TiO2. These rates are four times and almost forty times higher than the CO and CH4 production rates observed with commercial TiO2 P25.
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Gou Z, Qu H, Liu H, Ma Y, Zong L, Li B, Xie C, Li Z, Li W, Wang L. Coupling of N-Doped Mesoporous Carbon and N-Ti 3 C 2 in 2D Sandwiched Heterostructure for Enhanced Oxygen Electroreduction. Small 2022; 18:e2106581. [PMID: 35229469 DOI: 10.1002/smll.202106581] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/27/2022] [Indexed: 06/14/2023]
Abstract
2D heterostructures provide a competitive platform to tailor electrical property through control of layer structure and constituents. However, despite the diverse integration of 2D materials and their application flexibility, tailoring synergistic interlayer interactions between 2D materials that form electronically coupled heterostructures remains a grand challenge. Here, the rational design and optimized synthesis of electronically coupled N-doped mesoporous defective carbon and nitrogen modified titanium carbide (Ti3 C2 ) in a 2D sandwiched heterostructure, is reported. First, a F127-polydopamine single-micelle-directed interfacial assembly strategy guarantees the construction of two surrounding mesoporous N-doped carbon monolayers assembled on both sides of Ti3 C2 nanosheets. Second, the followed ammonia post-treatment successfully introduces N elements into Ti3 C2 structure and more defective sites in N-doped mesoporous carbon. Finally, the oxygen reduction reaction (ORR) and theoretical calculation prove the synergistic coupled electronic effect between N-Ti3 C2 and defective N-doped carbon active sites in the 2D sandwiched heterostructure. Compared with the control 2D samples (0.87-0.88 V, 4.90-5.15 mA cm-2 ), the coupled 2D heterostructure possesses the best onset potential of 0.90 V and limited density current of 5.50 mA cm-2 . Meanwhile, this catalyst exhibits superior methanol tolerance and cyclic durability. This design philosophy opens up a new thought for tailoring synergistic interlayer interactions between 2D materials.
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Affiliation(s)
- Zhaolin Gou
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Huiqi Qu
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
| | - Hanfang Liu
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Yiru Ma
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Lingbo Zong
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Bin Li
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Congxia Xie
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Zhenjiang Li
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Wei Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai, Shanghai, 200433, China
| | - Lei Wang
- Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, Qingdao, 266042, China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
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48
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Shang P, Liu M, Mei Y, Liu Y, Wu L, Dong Y, Zhao Z, Qiu J. Urea-Mediated Monoliths Made of Nitrogen-Enriched Mesoporous Carbon Nanosheets for High-Performance Aqueous Zinc Ion Hybrid Capacitors. Small 2022; 18:e2108057. [PMID: 35279955 DOI: 10.1002/smll.202108057] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/24/2022] [Indexed: 06/14/2023]
Abstract
Aqueous zinc ion hybrid capacitors (aZHCs) are of great potential for large-scale energy storage and flexible wearable devices, of which the specific capacity and energy density need to be further enhanced for practical applications. Herein, a urea-mediated foaming strategy is reported for the efficient synthesis of monoliths consisting of nitrogen-enriched mesoporous carbon nanosheets (NPCNs) by prefoaming drying a solution made of polyvinylpyrrolidone, zinc nitrate, and urea at low temperatures, foaming and annealing at high temperatures, and subsequent acid etching. NPCNs have a large lateral size of ≈40 µm, thin thickness of ≈55 nm, abundant micropores and mesopores (≈3.8 nm), and a high N-doping value of 9.7 at.%. The NPCNs as the cathode in aZHCs provide abundant zinc storage sites involving both physical and chemical adsorption/desorption of Zn2+ ions, and deliver high specific capacities of 262 and 115 mAh g-1 at 0.2 and 10 A g-1 , and a remarkable areal capacity of ≈0.5 mAh cm-2 with a mass loading of 5.3 mg cm-2 , outperforming most carbon cathodes reported thus far. Moreover, safe and flexible NPCNs based quasi-solid-state devices are fabricated, which can withstand drilling and mechanical bending, suggesting their potential applications in wearable devices.
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Affiliation(s)
- Ping Shang
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Min Liu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Yingying Mei
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Yuanhao Liu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Lisha Wu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Yanfeng Dong
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
- State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Zongbin Zhao
- State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Jieshan Qiu
- State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
- College of Chemical Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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49
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Sarkar S, Won JS, An M, Zhang R, Lee JH, Lee SG, Joo YL. Tailoring Mesopores and Nitrogen Groups of Carbon Nanofibers for Polysulfide Entrapment in Lithium-Sulfur Batteries. Polymers (Basel) 2022; 14:1342. [PMID: 35406216 DOI: 10.3390/polym14071342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/18/2022] [Accepted: 03/23/2022] [Indexed: 02/05/2023] Open
Abstract
In the current work, we combined different physical and chemical modifications of carbon nanofibers through the creation of micro-, meso-, and macro-pores as well as the incorporation of nitrogen groups in cyclic polyacrylonitrile (CPAN) using gas-assisted electrospinning and air-controlled electrospray processes. We incorporated them into electrode and interlayer in Li–Sulfur batteries. First, we controlled pore size and distributions in mesoporous carbon fibers (mpCNF) via adding polymethyl methacrylate as a sacrificial polymer to the polyacrylonitrile carbon precursor, followed by varying activation conditions. Secondly, nitrogen groups were introduced via cyclization of PAN on mesoporous carbon nanofibers (mpCPAN). We compared the synergistic effects of all these features in cathode substrate and interlayer on the performance Li–Sulfur batteries and used various characterization tools to understand them. Our results revealed that coating CPAN on both mesoporous carbon cathode and interlayer greatly enhanced the rate capability and capacity retention, leading to the capacity of 1000 mAh/g at 2 C and 1200 mAh/g at 0.5 C with the capability retention of 88% after 100 cycles. The presence of nitrogen groups and mesopores in both cathodes and interlayers resulted in more effective polysulfide confinement and also show more promise for higher loading systems.
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Zheng F, Chu K, Yang Y, Li Z, Wei L, Xu Y, Yao G, Chen Q. Optimizing the Interlayer Spacing of Heteroatom-Doped Carbon Nanofibers toward Ultrahigh Potassium-Storage Performances. ACS Appl Mater Interfaces 2022; 14:9212-9221. [PMID: 35152696 DOI: 10.1021/acsami.1c24275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Precise control over the interlayer spacing for K+ intercalation is an effective approach to boost the potassium-storage performances in carbonaceous materials. Herein, we first found that the optimal interlayer spacing for K+ intercalation is around 0.38 nm for N, O codoped carbon nanofibers (NOCNs), displaying a reversible capacity of 627 mAh g-1 at 0.1 A g-1 after 200 cycles, excellent rate capability (123 mAh g-1 at 20 A g-1), and ultrastable cycling stability (262 mAh g-1 at 5 A g-1 after 10 000 cycles). Such good potassium-storage performances have never been reported in carbonaceous materials. The theoretical calculations and electrochemical studies reveal that the optimal interlayer spacing and N, O heteroatom-induced active sites work together to provide an intercalation-adsorption mechanism for storing K+ in carbonaceous materials. This work facilitates the understanding of the role of the critical interlayer spacing for K+ intercalation in carbonaceous materials.
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Affiliation(s)
- Fangcai Zheng
- Institutes of Physical Science and Information Technology and Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
| | - Kainian Chu
- Institutes of Physical Science and Information Technology and Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
| | - Yang Yang
- Hefei National Laboratory for Physical Science at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Zhiqiang Li
- Institutes of Physical Science and Information Technology and Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
| | - Lingzhi Wei
- Institutes of Physical Science and Information Technology and Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
| | - Yang Xu
- Institutes of Physical Science and Information Technology and Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
| | - Ge Yao
- Institutes of Physical Science and Information Technology and Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
| | - Qianwang Chen
- Hefei National Laboratory for Physical Science at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China
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