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Li L, Wang X, Gu H, Zhang H, Zhang J, Zhang Q, Dai WL. Which Is More Efficient in Promoting the Photocatalytic H 2 Evolution Performance of g-C 3N 4: Monometallic Nanocrystal, Heterostructural Nanocrystal, or Bimetallic Nanocrystal? Inorg Chem 2022; 61:4760-4768. [PMID: 35245035 DOI: 10.1021/acs.inorgchem.2c00171] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Generally, an excellent cocatalyst could promote the photocatalytic hydrogen (H2) evolution performance of g-C3N4 significantly. Herein, a superior cocatalyst of gold-platinum (AuPt) nanocrystal with an ultralow content of Pt was successfully decorated on carbon self-doping g-C3N4 nanosheets (AuPt/CCN) via a facile photodeposition route. The corresponding Pt/CCN, Au/CCN, Au/Pt/CCN, and Pt/Au/CCN were also prepared for comparison. It is found that AuPt/CCN exhibits much superior photocatalytic H2 evolution performance (1135 μmol/h) when irradiated with a 300 W Xe lamp, up to 20, 12, 5, 2, and 1.5 times that of the pristine CCN, Pt/CCN, Au/CCN, Au/Pt/CCN, and Pt/Au/CCN, respectively. The quantum efficiency (QE) of AuPt/CCN at 420 nm reaches 12.5%. The experimental and density functional theory calculation results suggested that the improved AuPt performance can be mainly ascribed to the non-plasmon-related synergistic effect of Au and Pt atoms in AuPt nanocrystal: (1) the proximity and the electronegativity difference of Au and Pt atoms in AuPt accelerate the transfer and separation of charge carriers and (2) the synergistic interaction between Pt and Au atoms optimizes the Gibbs free energy (ΔGH*) of H* (atom) adsorption on AuPt, promoting the H2 generation kinetics of AuPt/CCN.
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Affiliation(s)
- Lingfeng Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Xiaohao Wang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Huajun Gu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Huihui Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Juhua Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Quan Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Wei-Lin Dai
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
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Li J, Zhang M, Chen J, Jia H. The Effect of Noble-Metal Deposition Routes on the Characteristics and Photocatalytic Activity of M-TiBi1.9%O2 (M = Pt and Pd). Top Catal 2020. [DOI: 10.1007/s11244-020-01307-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Widakdo J, Chiao YH, Lai YL, Imawan AC, Wang FM, Hung WS. Mechanism of a Self-Assembling Smart and Electrically Responsive PVDF-Graphene Membrane for Controlled Gas Separation. ACS Appl Mater Interfaces 2020; 12:30915-30924. [PMID: 32539328 DOI: 10.1021/acsami.0c04402] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The development of science and technology is accompanied by a complex composition of multiple pollutants. Conventional passive separation processes are not sufficient for current industrial applications. The advent of active or responsive separation methods has become highly essential for future applications. In this work, we demonstrate the preparation of a smart electrically responsive membrane, a poly(vinylidene difluoride) (PVDF)-graphene composite membrane. The high graphene content induces the self-assembly of PVDF with a high β-phase content, which displays a unique self-piezoelectric property. Additionally, the membrane exhibits excellent electrical conductivity and unique capacitive properties, and the resultant nanochannels in the membrane can be reversibly adjusted by external voltage applications, resulting in the tailored gas selectivity of a single membrane. After the application of voltage to the membrane, the permeability and selectivity toward carbon dioxide increase simultaneously. Moreover, atomic-level positron annihilation spectroscopic studies reveal the piezoelectric effect on the free volume of the membrane, which helps us to formulate a gas permeation mechanism for the electrically responsive membrane. Overall, the novel active membrane separation process proposed in this work opens new avenues for the development of a new generation of responsive membranes.
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Affiliation(s)
- Januar Widakdo
- Graduate Institute of Applied Science and Technology, Advanced Membrane Materials Research Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Yu-Hsuan Chiao
- Department of Chemical Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Yu-Lun Lai
- Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31057, Taiwan
| | - Arif C Imawan
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Fu-Ming Wang
- Graduate Institute of Applied Science and Technology, and Sustainable Energy Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
- R&D Centre for Membrane Technology and Department of Chemical Engineering, Chung Yuan University, Taoyuan 32023, Taiwan
| | - Wei-Song Hung
- Graduate Institute of Applied Science and Technology, Advanced Membrane Materials Research Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
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Andrade VM, Amirov A, Yusupov D, Pimentel B, Barroca N, Pires AL, Belo JH, Pereira AM, Valente MA, Araújo JP, Reis MS. Multicaloric effect in a multiferroic composite of Gd 5(Si,Ge) 4 microparticles embedded into a ferroelectric PVDF matrix. Sci Rep 2019; 9:18308. [PMID: 31797952 DOI: 10.1038/s41598-019-54635-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 11/04/2019] [Indexed: 11/30/2022] Open
Abstract
The coupling between electric, magnetic and elastic features in multiferroic materials is an emerging field in materials science, with important applications on alternative solid-state cooling technologies, energy harvesting and sensors/actuators. In this direction, we developed a thorough investigation of a multiferroic composite, comprising magnetocaloric/magnetostrictive Gd\documentclass[12pt]{minimal}
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\begin{document}$${}_{1.6}$$\end{document}1.6 microparticles blended into a piezo- and pyroelectric poly(vinylidene) fluoride (PVDF) matrix. Using a simple solvent casting technique, the formation and stabilization of PVDF electroactive phases are improved when the filler content increases from 2 to 12 weight fraction (wt.%). This effect greatly contributes to the magnetoelectric (ME) coupling, with the ME coefficient \documentclass[12pt]{minimal}
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\begin{document}$${\alpha }_{ME}$$\end{document}αME increasing from 0.3 V/cm.Oe to 2.2 V/cm.Oe, by increasing the amount of magnetic material. In addition, magnetic measurements revealed that the ME-coupling has influenced the magnetocaloric effect via a contribution from the electroactive polymer and hence leading to a multicaloric effect. These results contribute to the development of multifunctional systems for novel technologies.
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Sang L, Lei L, Burda C. Electrochemical Fabrication of rGO-embedded Ag-TiO 2 Nanoring/Nanotube Arrays for Plasmonic Solar Water Splitting. Nanomicro Lett 2019; 11:97. [PMID: 34138041 PMCID: PMC7770785 DOI: 10.1007/s40820-019-0329-2] [Citation(s) in RCA: 10] [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: 08/26/2019] [Accepted: 10/23/2019] [Indexed: 05/23/2023]
Abstract
Effective utilization of hot electrons generated from the decay of surface plasmon resonance in metal nanoparticles is conductive to improve solar water splitting efficiency. Herein, Ag nanoparticles and reduced graphene oxide (rGO) co-decorated hierarchical TiO2 nanoring/nanotube arrays (TiO2 R/T) were facilely fabricated by using two-step electrochemical anodization, electrodeposition, and photoreduction methods. Comparative studies were conducted to elucidate the effects of rGO and Ag on the morphology, photoresponse, charge transfer, and photoelectric properties of TiO2. Firstly, scanning electron microscope images confirm that the Ag nanoparticles adhered on TiO2 R/T and TiO2 R/T-rGO have similar diameter of 20 nm except for TiO2 R-rGO/T. Then, the UV-Vis DRS and scatter spectra reveal that the optical property of the Ag-TiO2 R/T-rGO ternary composite is enhanced, ascribing to the visible light absorption of plasmonic Ag nanoparticles and the weakening effect of rGO on light scattering. Meanwhile, intensity-modulated photocurrent spectroscopy and photoluminescence spectra demonstrate that rGO can promote the hot electrons transfer from Ag nanoparticles to Ti substrate, reducing the photogenerated electron-hole recombination. Finally, Ag-TiO2 R/T-rGO photoanode exhibits high photocurrent density (0.98 mA cm-2) and photovoltage (0.90 V), and the stable H2 evolution rate of 413 μL h-1 cm-2 within 1.5 h under AM 1.5 which exceeds by 1.30 times than that of pristine TiO2 R/T. In line with the above results, this work provides a reliable route synergizing rGO with plasmonic metal nanoparticles for photocatalysis, in which, rGO presents a broad absorption spectrum and effective photogenerated electrons transfer.
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Affiliation(s)
- Lixia Sang
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, People's Republic of China.
| | - Lei Lei
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, People's Republic of China
| | - Clemens Burda
- Department of Chemistry, Center for Chemical Dynamics and Nanomaterials Research, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
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Lei X, Cao Y, Chen Q, Ao X, Fang Y, Liu B. ZIF-8 derived hollow CuO/ZnO material for study of enhanced photocatalytic performance. Colloids Surf A Physicochem Eng Asp 2019; 568:1-10. [DOI: 10.1016/j.colsurfa.2019.01.072] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Lee Y, Lee S, Kim HS, Moon JT, Joo JB, Choi I. Multifunctional and recyclable TiO2 hybrid sponges for efficient sorption, detection, and photocatalytic decomposition of organic pollutants. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Wang L, Su Z, Yuan J. The Influence of Materials, Heterostructure, and Orientation for Nanohybrids on Photocatalytic Activity. Nanoscale Res Lett 2019; 14:20. [PMID: 30643998 PMCID: PMC6331350 DOI: 10.1186/s11671-019-2851-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 01/02/2019] [Indexed: 05/25/2023]
Abstract
In this work, different structures based on electrodeposited n-type ZnO nanorods and p-type Cu2O, CuSCN, and NiO nanostructures are fabricated for the degradation of methyl orange (MO). The influence of materials, heterostructure, and orientation for nanohybrids on photocatalytic activity is discussed for the first time. The heterojunction structures show remarkable enhancement compared to the bare semiconductor. The morphology of nanostructure has mainly an influence on the photocatalytic activity. NiO has the highest catalytic activity among the four pristine semiconductor nanostructures of ZnO, Cu2O, CuSCN, and NiO. The greatest enhancement of the photocatalytic activity is obtained using a ZnO/NiO (1 min) heterostructure attributed to the heterojunction structure and extremely higher specific surface area, which can degrade MO (20 mg/L) into colorless within 20 min with the fastest photocatalytic speed among homogeneous heterojunction structures. Meanwhile, the methodology and data analysis described herein will serve as an effective approach for the design of hybrid nanostructures for solar energy application, and the appropriate nanohybrids will have significant potential to solve the environment and energy issues.
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Affiliation(s)
- Lidan Wang
- College of Chemical Engineering and Material, Quanzhou Normal University, Quanzhou, 362000 Fujian China
| | - Zisheng Su
- College of Physics and Information Engineering, Quanzhou Normal University, Quanzhou, 362000 Fujian China
| | - Junsheng Yuan
- College of Chemical Engineering and Material, Quanzhou Normal University, Quanzhou, 362000 Fujian China
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Bhunia K, Chandra M, Khilari S, Pradhan D. Bimetallic PtAu Alloy Nanoparticles-Integrated g-C 3N 4 Hybrid as an Efficient Photocatalyst for Water-to-Hydrogen Conversion. ACS Appl Mater Interfaces 2019; 11:478-488. [PMID: 30525406 DOI: 10.1021/acsami.8b12183] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Herein, we report the synthesis of metal (Pt and Au) and metal alloy (PtAu) nanoparticles (NPs)-integrated graphitic carbon nitride (g-C3N4) hybrids using a facile solvothermal route for water-splitting application. The metal and metal alloy NPs with varying percentages of Pt and Au are found to be in the size range of 3-5 nm and uniformly distributed on the g-C3N4 sheets. The metal and metal alloy NPs act as cocatalyst for g-C3N4 to enhance the photocatalytic activity for hydrogen (H2) generation through higher light absorption and efficient charge separation. The alloy composition plays an important role to maximize the photoactivity, with an optimized PtAu/g-C3N4 sample delivered 1009 μmol g-1 h-1 of H2. The visible light assisted photocatalytic H2 evolution is further investigated with the optimized PtAu alloy NPs-integrated g-C3N4. This study presents a robust, stable, and easily synthesizable PtAu/g-C3N4 hybrid material as a promising photocatalyst for H2 generation through water splitting.
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Affiliation(s)
- Kousik Bhunia
- Materials Science Centre , Indian Institute of Technology Kharagpur , Kharagpur 721 302 , W. B. , India
| | - Moumita Chandra
- Materials Science Centre , Indian Institute of Technology Kharagpur , Kharagpur 721 302 , W. B. , India
| | - Santimoy Khilari
- Materials Science Centre , Indian Institute of Technology Kharagpur , Kharagpur 721 302 , W. B. , India
| | - Debabrata Pradhan
- Materials Science Centre , Indian Institute of Technology Kharagpur , Kharagpur 721 302 , W. B. , India
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Yang D, Chen Y, Peng H, Chen G, Lin Z. An integrated experimental and theoretical study on the optical properties of uniform hairy noble metal nanoparticles. Nanoscale 2018; 10:22750-22757. [PMID: 30346004 DOI: 10.1039/c8nr07115b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report a viable route to plasmonic nanoparticles with well-controlled sizes, shapes, and compositions. A series of monodisperse Ag and Au nanoparticles capped with polystyrene chains (i.e., "hairy" nanoparticles) are crafted by capitalizing on star-like diblock copolymers as nanoreactors. Such monodisperse nanoparticles render an accurate absorption spectrum, providing a strong basis for theoretical investigation into their optical properties. By combining the experimental study with the three-dimensional finite element calculation of electromagnetic field distributions, the contributions of both intra-band and inter-band transitions to plasmonic absorption are revealed. The calculated absorption spectra perfectly reproduce the experimental observations, including the peak positions, shapes, and trends of peak shifting or broadening as a function of nanoparticle sizes. The influences of nanoparticle dimensions and surface ligands on plasmonic absorption of metallic nanoparticles are also systematically explored.
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Affiliation(s)
- Di Yang
- School of Science, Minzu University of China, Beijing 100081, China
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11
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Wang J, Zhang D, Deng J, Chen S. Fabrication of phosphorus nanostructures/TiO2 composite photocatalyst with enhancing photodegradation and hydrogen production from water under visible light. J Colloid Interface Sci 2018; 516:215-223. [DOI: 10.1016/j.jcis.2018.01.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 12/25/2017] [Accepted: 01/02/2018] [Indexed: 11/24/2022]
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12
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Lu Y, Feng Y, Wang F, Zou X, Chen Z, Chen P, Liu H, Su Y, Zhang Q, Liu G. Facile hydrothermal synthesis of carbon dots (CDs) doped ZnFe2O4/TiO2 hybrid materials with high photocatalytic activity. J Photochem Photobiol A Chem 2018; 353:10-8. [DOI: 10.1016/j.jphotochem.2017.10.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Le L, Wu Y, Zhou Z, Wang H, Xiong R, Shi J. Cu2O clusters decorated on flower-like TiO2 nanorod array film for enhanced hydrogen production under solar light irradiation. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.08.073] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gao B, Chen W, Dong S, Liu J, Liu T, Wang L, Sillanpää M. Polypyrrole/ZnIn2S4 composite photocatalyst for enhanced mineralization of chloramphenicol under visible light. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.09.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Gao G, Xi Q, Zhou H, Zhao Y, Wu C, Wang L, Guo P, Xu J. Novel inorganic perovskite quantum dots for photocatalysis. Nanoscale 2017; 9:12032-12038. [PMID: 28795754 DOI: 10.1039/c7nr04421f] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Herein, we report the performance of CsPbX3 (X = Cl, Br, and I) perovskite quantum dots (QDs) for photocatalytic degradation of organic dyes. The photocatalytic performance of CsPbX3 QDs was characterized by UV-vis absorption spectra and ESI-MS, which evaluated their ability of degrading methyl orange (MO) solution under visible light irradiation. Interestingly, both CsPbCl3 and CsPbBr3 QDs show excellent photocatalytic activities, which can decompose the MO solution into a colorless solution within 100 min. This study demonstrates the potential of CsPbX3 QDs in the degradation of organic dyes and environmentally friendly applications. Moreover, the integration of CsPbX3 QDs and photocatalysis provides a new insight for the design of new photocatalysts.
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Affiliation(s)
- Ge Gao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China.
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Moldovan S, Roiban L, Georgescu D, Baia L, Ersen O. Thermal evolution of silver nanoparticles onto porous TiO 2 nanostructures. Catal Today 2017; 284:221-8. [DOI: 10.1016/j.cattod.2016.12.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Hu X, Li Y, Tian J, Yang H, Cui H. Highly efficient full solar spectrum (UV-vis-NIR) photocatalytic performance of Ag2S quantum dot/TiO2 nanobelt heterostructures. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.09.022] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Dai B, Huang H, Wang W, Chen Y, Lu C, Kou J, Wang L, Wang F, Xu Z. Greatly enhanced photocatalytic activity by organic flexible piezoelectric PVDF induced spatial electric field. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01638g] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient charge separation accelerated by a spatial electric field is a vital factor for semiconductor photocatalysts to achieve high photocatalytic activity.
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Affiliation(s)
- Baoying Dai
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Hengming Huang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Wei Wang
- School of Physics and Optoelectronic Engineering
- Nanjing University of Information Science & Technology
- Nanjing 210044
- P. R. China
| | - Yukai Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Chunhua Lu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Jiahui Kou
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Lianzhou Wang
- Nanomaterials Center
- School of Chemical Engineering and Australia Institute for Bioengineering and Nanotechnology
- University of Queensland
- Brisbane
- Australia
| | - Fulei Wang
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- P.R. China
| | - Zhongzi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
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Wang J, Ong WL, Ho JH, Ho GW. Inorganic-organic Hybrid Membranes for Photocatalytic Hydrogen Generation and Volatile Organic Compound Degradation. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.proeng.2017.11.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Shao S, Chen Y, Huang S, Jiang F, Wang Y, Koehn R. A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation. RSC Adv 2017. [DOI: 10.1039/c7ra07478f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Pt/GQDs/TiO2 nanocomposite thin film-based gas sensors show tunable VOC sensing behaviour at room temperature under visible-light activation.
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Affiliation(s)
- Shaofeng Shao
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Yunyun Chen
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Shenbei Huang
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Fan Jiang
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Yunfei Wang
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Ralf Koehn
- Center for Free-Electron Laser Science
- Hanburg
- Germany
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Deng F, Pei X, Luo Y, Luo X, Dionysiou D, Wu S, Luo S. Fabrication of Hierarchically Porous Reduced Graphene Oxide/SnIn4S8 Composites by a Low-Temperature Co-Precipitation Strategy and Their Excellent Visible-Light Photocatalytic Mineralization Performance. Catalysts 2016; 6:113. [DOI: 10.3390/catal6080113] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Meng X, Yao P, Xu Y, Meng H, Zhang X. Fabrication of organic–inorganic hybrid membranes composed of poly(vinylidene fluoride) and silver cyanamide and their high photocatalytic activity under visible light irradiation. RSC Adv 2016. [DOI: 10.1039/c6ra10434g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An active photocatalytic membrane composed of silver cyanamide and poly(vinylidene fluoride) showed high photocatalytic efficiency toward the degradation of Acid Blue 1 under visible light irradiation.
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Affiliation(s)
- Xinru Meng
- Department of Chemistry
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Pin Yao
- Department of Chemistry
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Yan Xu
- Department of Chemistry
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Hao Meng
- Department of Chemistry
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Xia Zhang
- Department of Chemistry
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
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24
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Zhu L, Fu Tan C, Gao M, Ho GW. Design of a Metal Oxide-Organic Framework (MoOF) Foam Microreactor: Solar-Induced Direct Pollutant Degradation and Hydrogen Generation. Adv Mater 2015; 27:7713-7719. [PMID: 26501718 DOI: 10.1002/adma.201503828] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [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: 08/06/2015] [Revised: 09/23/2015] [Indexed: 06/05/2023]
Abstract
A macroporous carbon network combined with mesoporous catalyst immobilization by a template method gives a metal-oxide-organic framework (MoOF) foam microreactor that readily soaks up pollutants and localizes solar energy in itself, leading to effective degradation of water pollutants (e.g., methyl orange (MO) and also hydrogen generation. The cleaned-up water can be removed from the microreactor simply by compression, and the microreactor used repeatedly.
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Affiliation(s)
- Liangliang Zhu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Chuan Fu Tan
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Minmin Gao
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
- Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, 117575, Singapore
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
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25
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Wang M, Zhai S, Ye Z, He L, Peng D, Feng X, Yang Y, Fang S, Zhang H, Zhang Z. An electrochemical aptasensor based on a TiO2/three-dimensional reduced graphene oxide/PPy nanocomposite for the sensitive detection of lysozyme. Dalton Trans 2015; 44:6473-9. [PMID: 25751032 DOI: 10.1039/c5dt00168d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A sensitive aptasensor based on a nanocomposite of hollow titanium dioxide nanoball, three-dimensional reduced graphene oxide, and polypyrrole (TiO2/3D-rGO/PPy) was developed for lysozyme detection. A lysozyme aptamer was easily immobilized onto the TiO2/3D-rGO/PPy nanocomposite matrix by assembling the aptamer onto graphene through simple π-stacking interactions and electrostatic interactions between PPy molecular chains and aptamer strands. In the presence of lysozyme, the aptamer on the adsorbent layer catches the target on the electrode interface, which generates a barrier for electrons and inhibits electron transfer, subsequently resulting in decreased electrochemically differential pulse voltammetric signals of a gold electrode modified with TiO2/3D-rGO/PPy. Using this strategy, a low limit of detection of 0.085 ng mL(-1) (5.5 pM) for detecting lysozyme was observed within the detection range of 0.1-50 ng mL(-1) (0.007-3.5 nM). The aptasensor also presents high specificity for lysozyme, which is unaffected by the coexistence of other proteins. Such an aptasensor opens a rapid, selective, and sensitive route to lysozyme detection. This finding indicates that the TiO2/3D-rGO/PPy nanocomposite could be used as an electrochemical biosensor for detecting proteins in the biomedical field.
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Affiliation(s)
- Minghua Wang
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, No. 166, Science Avenue, Zhengzhou 450001, P. R. China.
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26
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Zhu L, Hong M, Wei Ho G. Hierarchical Assembly of SnO2/ZnO Nanostructures for Enhanced Photocatalytic Performance. Sci Rep 2015; 5:11609. [PMID: 26109295 PMCID: PMC4479871 DOI: 10.1038/srep11609] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 05/15/2015] [Indexed: 12/04/2022] Open
Abstract
SnO2/ZnO hierarchical heterostructures have been successfully synthesized by combining electrospinning technique and hydrothermal method. Various morphologies of the secondary ZnO nanostructures including nanorods (NRs) and nanosheets (NSs) can be tailored by adding surfactants. Photocatalytic performance of the heterostructures was investigated and obvious enhancement was demonstrated in degradation of the organic pollutant, compared to the primary SnO2-based nanofibers (NFs) and bare ZnO. Furthermore, it was found that the H2 evolution from water splitting was achieved by photocatalysis of heterostructured nanocomposites after sulfurization treatment. This synthetic methodology described herein promises to be an effective approach for fabricating variety of nanostructures for enhanced catalytic applications. The heterostructured nanomaterials have considerable potential to address the environmental and energy issues via degradation of pollutant and generation of clean H2 fuel.
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Affiliation(s)
- Liangliang Zhu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Minghui Hong
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore.,Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, 117575, Singapore
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore.,Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, 117575, Singapore.,Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
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27
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Zhu T, Li Ong W, Zhu L, Wei Ho G. TiO2 Fibers Supported β-FeOOH Nanostructures as Efficient Visible Light Photocatalyst and Room Temperature Sensor. Sci Rep 2015; 5:10601. [PMID: 26030002 PMCID: PMC4450542 DOI: 10.1038/srep10601] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 04/20/2015] [Indexed: 01/27/2023] Open
Abstract
Hierarchical heterostructures of beta-iron oxyhydroxide (β-FeOOH) nanostructures on electrospun TiO2 nanofibers were synthesized by a facile hydrothermal method. This synthesis method proves to be versatile to tailoring of β-FeOOH structural design that cuts across zero-dimensional particles (TF-P), one-dimensional needles (TF-N) to two-dimensional flakes (TF-F). In addition, synthesizing such oxyhyroxide nanostructures presents the advantage of exhibiting similar functional performances to its oxides counterpart however, without the need to undergo any annealing step which leads to undesirable structural collapse or sintering. The as-prepared hierarchical heterostructures possess high surface area for dye adsorptivity, efficient charge separation and visible photocatalytic activity. Also, for the first time, hydrogen gas sensing has been demonstrated on β-FeOOH nanostructures at room temperature. The reported hierarchical heterostructures of β-FeOOH on TiO2 nanofibers afford multiple functions of photocatalysis and sensing which are highly promising for environment monitoring and clean up applications.
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Affiliation(s)
- Ting Zhu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Wei Li Ong
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Liangliang Zhu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore.,Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, 117575, Singapore.,Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
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28
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Li W, Pei X, Deng F, Luo X, Li F, Xiao Y. Bio-inspired artificial functional photocatalyst: biomimetic enzyme-like TiO2/reduced graphene oxide nanocomposite with excellent molecular recognition ability. Nanotechnology 2015; 26:175706. [PMID: 25851067 DOI: 10.1088/0957-4484/26/17/175706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An enzyme-like TiO(2)/reduced graphene oxide (enzyme-TiO(2)/rGO) nanocomposite with molecular recognition ability was fabricated by biomimicking the geometrical and chemical complementation of the enzyme and substrate. The anatase TiO(2) nanocrystals were densely dispersed on rGO nanosheets with close interfacial contacts. With geometrical and chemical matching of target molecules and memorized cavities, the adsorption capacity of enzyme-TiO(2)/rGO nanocomposites for 4-nitrophenol (4.71 mg g(-1)) is about six times that of control TiO(2)/rGO without the enzyme-like feature (0.79 mg g(-1)), and the enzyme-TiO(2)/rGO shows a relative selectivity coefficient of 7.24. Moreover, enzyme-TiO(2)/rGO exhibits molecular recognitive photocatalytic degradation for a particular contaminant. The results demonstrate that enzyme-substrate recognition provides a convenient and powerful basis on which to biomimic and construct efficient photocatalysts with high selectivity.
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Affiliation(s)
- Wentao Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, People's Republic of China. College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, People's Republic of China
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29
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Zhang LJ, Zheng R, Li S, Liu BK, Wang DJ, Wang LL, Xie TF. Enhanced photocatalytic H₂ generation on cadmium sulfide nanorods with cobalt hydroxide as cocatalyst and insights into their photogenerated charge transfer properties. ACS Appl Mater Interfaces 2014; 6:13406-12. [PMID: 25105856 DOI: 10.1021/am501216b] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Cobalt hydroxide/cadmium sulfide composite was prepared using an easy coprecipitation strategy. The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) confirmed that Co(OH)2 nanometer particles were modified on CdS. Even without noble-metal cocatalyst, the photocatalytic H2 evolution over CdS after Co(OH)2 loaded was evidently increased. The most excellent Co(OH)2 of 6.8 mol %, resulted in a H2 generation rate of 61 μmol h(-1) g(-1), which exceeded that of pure CdS by a factor of 41 times. Surface photovoltage (SPV) and surface photocurrent (SPC) investigations revealed that the photogenerated electrons could be captured by the loaded Co(OH)2 nanoparticles. The interface formed between Co(OH)2 and CdS is vital to the enhancement of photocatalytic H2 generation. Electrochemical measurement results indicated that another reason for the enhanced photocatalytic activity of Co(OH)2/CdS catalyst is that Co(OH)2 has outstanding H2 generation activity.
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Affiliation(s)
- Li J Zhang
- State Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China
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30
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Chen F, Yan F, Chen Q, Wang Y, Han L, Chen Z, Fang S. Fabrication of Fe3O4@SiO2@TiO2nanoparticles supported by graphene oxide sheets for the repeated adsorption and photocatalytic degradation of rhodamine B under UV irradiation. Dalton Trans 2014; 43:13537-44. [DOI: 10.1039/c4dt01702a] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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