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Xin Z, Zhang Y, Hou D, Sun H, Ding Z, Wang P, Wang M, Wang X, Xu Q, Guan J, Yang J, Liu Y, Zhang L. Atomic Insights into the Relationship between Molecular Structure and Dispersion Performance of Phenyl Polymer on Graphene Oxide. Langmuir 2024; 40:413-425. [PMID: 38133590 DOI: 10.1021/acs.langmuir.3c02648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
The adsorption of organic polymers onto the surface of graphene oxide is known to improve its dispersibility in cement-based materials. However, the mechanism of this improvement at the atomic level is not yet fully understood. In this study, we employ a combination of DFT static calculation and umbrella sampling to explore the reactivity of polymers and investigate the effects of varying amounts of phenyl groups on their adsorption capacity on the surface of graphene oxide. Quantitative analysis is utilized to study the structural reconstruction and charge transfer caused by polymers from multiple perspectives. The interfacial reaction between the polymer and graphene oxide surface is further clarified, indicating that the adsorption process is promoted by hydrogen bond interactions and π-π stacking effects. This study sheds light on the adsorption mechanism of polymer-graphene oxide systems and has important implications for the design of more effective graphene oxide dispersants at the atomic level.
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Affiliation(s)
- Zhaorui Xin
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Yue Zhang
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Dongshuai Hou
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Huiwen Sun
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Zhiheng Ding
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Pan Wang
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Muhan Wang
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Xinpeng Wang
- Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Qingqing Xu
- Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jing Guan
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China
| | - Jiayi Yang
- College of Materials Design and Engineering, Beijing Institute of Fashion and Technology, Beijing 100029, China
| | - Yingchun Liu
- College of Materials Design and Engineering, Beijing Institute of Fashion and Technology, Beijing 100029, China
| | - Liran Zhang
- College of Materials Design and Engineering, Beijing Institute of Fashion and Technology, Beijing 100029, China
- Department of Chemical Engineering, China University of Mining & Technology, Beijing 100083, China
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NagaVenkata Satyanarayana G, Raghavan A, Jayachitra S, Sathish M, Saikat Roy S, Ghosh S. Rhus Semialata
Derived Carbon Quantum Dots Decorated Pt Deposited TiO
2
for Efficient Light‐Driven Hydrogen Production. ChemistrySelect 2022. [DOI: 10.1002/slct.202202705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gavidi NagaVenkata Satyanarayana
- Polymers and Functional Materials Division CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Akshaya Raghavan
- Polymers and Functional Materials Division CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - S. Jayachitra
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Electrochemical Power Sources Division CSIR-Central Electrochemical Research Institute Karaikudi 630003 India
| | - M. Sathish
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Electrochemical Power Sources Division CSIR-Central Electrochemical Research Institute Karaikudi 630003 India
| | | | - Sutapa Ghosh
- Polymers and 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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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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Wang Z, Zhou H, Xue J, Liu X, Liu S, Li X, He D. Ultrasonic-assisted hydrothermal synthesis of cobalt oxide/nitrogen-doped graphene oxide hybrid as oxygen reduction reaction catalyst for Al-air battery. Ultrason Sonochem 2021; 72:105457. [PMID: 33444941 PMCID: PMC7808954 DOI: 10.1016/j.ultsonch.2020.105457] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 05/11/2023]
Abstract
A persistent ultrasound-assisted hydrothermal method has been developed to prepare cobalt oxide incorporated nitrogen-doped graphene (Co3O4/N-GO) hybrids. The electrochemical behaviors and catalytic activity of the prepared hybrids have been systematically investigated as cathode materials for Al-air battery. The results show that ultrasonication can promote the yield ratio of Co3O4 from 63.1% to 70.6%. The prepared Co3O4/N-GO hybrid with ultrasonication exhibits better ORR activity over that without ultrasonication. The assembled Al-air battery using the ultrasonicated Co3O4/N-GO hybrid exhibited an average working voltage of 1.02 V in 4 M KOH electrolyte at 60 mA∙cm-2, approximately 60 mV higher than that using hybrid without ultrasonication. This should be attributed to large number density of fine Co3O4 particles growing on the dispersed GO sheets under the persistent ultrasonication. The related ultrasonic mechanism has been discussed in details.
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Affiliation(s)
- Zengjie Wang
- Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Hongpeng Zhou
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jilai Xue
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Xuan Liu
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Shizhe Liu
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiang Li
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Dingyong He
- Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
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