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Kong D, Han X, Shevlin SA, Windle C, Warner JH, Guo ZX, Tang J. A Metal-Free Oxygenated Covalent Triazine 2-D Photocatalyst Works Effectively from the Ultraviolet to Near-Infrared Spectrum for Water Oxidation Apart from Water Reduction. ACS APPLIED ENERGY MATERIALS 2020; 3:8960-8968. [PMID: 33015589 PMCID: PMC7525806 DOI: 10.1021/acsaem.0c01153] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Solar-driven water splitting is highly desirable for hydrogen fuel production, particularly if water oxidation is effectively sustained in a complete cycle and/or by means of stable and efficient photocatalysts of main group elements, for example, carbon and nitrogen. Despite extensive success on H2 production on polymer photocatalysts, polymers have met with very limited success for the rate-determining step of the water splitting-water oxidation reaction due to the extremely slow "four-hole" chemistry. Here, the synthesized metal-free oxygenated covalent triazine (OCT) is remarkably active for oxygen production in a wide operation window from UV to visible and even to NIR (up to 800 nm), neatly matching the solar spectrum with an unprecedented external quantum efficiency (even 1% at 600 nm) apart from excellent activity for H2 production under full arc irradiation, a big step moving toward full solar spectrum water splitting. Experimental results and DFT calculations show that the oxygen incorporation not only narrows the band gap but also causes appropriate band-edge shifts. In the end, a controlled small amount of oxygen in the ionothermal reaction is found to be a promising and facile way of achieving such oxygen incorporation. This discovery is a significant step toward both scientific understanding and practical development of metal-free photocatalysts for cost-effective water oxidation and hydrogen generation over a large spectral window.
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Affiliation(s)
- Dan Kong
- Department
of Chemical Engineering, University College
London, Torrington Place, London WC1E 7JE, U.K.
| | - Xiaoyu Han
- Department
of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, U.K.
| | - Stephen A. Shevlin
- Department
of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, U.K.
| | - Christopher Windle
- Department
of Chemical Engineering, University College
London, Torrington Place, London WC1E 7JE, U.K.
| | - Jamie H. Warner
- Department
of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, U.K.
| | - Zheng-Xiao Guo
- Department
of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, U.K.
| | - Junwang Tang
- Department
of Chemical Engineering, University College
London, Torrington Place, London WC1E 7JE, U.K.
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Sánchez-Albores RM, Pérez-Sariñana BY, Meza-Avendaño C, Sebastian P, Reyes-Vallejo O, Robles-Ocampo JB. Hydrothermal synthesis of bismuth vanadate-alumina assisted by microwaves to evaluate the photocatalytic activity in the degradation of methylene Blue. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.07.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ganeshbabu M, Kannan N, Venkatesh PS, Paulraj G, Jeganathan K, MubarakAli D. Synthesis and characterization of BiVO4 nanoparticles for environmental applications. RSC Adv 2020; 10:18315-18322. [PMID: 35517221 PMCID: PMC9053757 DOI: 10.1039/d0ra01065k] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/27/2020] [Indexed: 11/21/2022] Open
Abstract
In the present study, a chemical precipitation method is adopted to synthesize bismuth vanadate nanoparticles. The calcination temperature dependent photocatalytic and antibacterial activities of BiVO4 nanoparticles are examined. The structural analysis evidences the monoclinic phase of BiVO4 nanoparticles, where the grain size increases with calcination temperature. Interestingly, BiVO4 nanoparticles calcined at 400 °C exhibit superior photocatalytic behaviour against methylene blue dye (K = 0.02169 min−1) under natural solar irradiation, which exhibits good stability for up to three cycles. The evolution of antibacterial activity studies using a well diffusion assay suggest that the BiVO4 nanoparticles calcined at 400 °C can act as an effective growth inhibitor of pathogenic Gram-negative (P. aeruginosa & A. baumannii) and Gram-positive bacteria (S. aureus). In the present study, a chemical precipitation method is adopted to synthesize bismuth vanadate nanoparticles.![]()
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Affiliation(s)
- M. Ganeshbabu
- Nanomaterials Laboratory
- Department of Physics
- Sri S. Ramasamy Naidu Memorial College
- Sattur-626 203
- India
| | - N. Kannan
- Nanomaterials Laboratory
- Department of Physics
- Sri S. Ramasamy Naidu Memorial College
- Sattur-626 203
- India
| | - P. Sundara Venkatesh
- Nanomaterials Laboratory
- Department of Physics
- Sri S. Ramasamy Naidu Memorial College
- Sattur-626 203
- India
| | - G. Paulraj
- Centre for Nanoscience and Nanotechnology
- Department of Physics
- Bharathidasan University
- Tiruchirappalli-620 024
- India
| | - K. Jeganathan
- Centre for Nanoscience and Nanotechnology
- Department of Physics
- Bharathidasan University
- Tiruchirappalli-620 024
- India
| | - D. MubarakAli
- School of Life Sciences
- B. S. Abdul Rahman Crescent Institute of Science and Technology
- Chennai-600 048
- India
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Stoll T, Zafeiropoulos G, Dogan I, Genuit H, Lavrijsen R, Koopmans B, Tsampas M. Visible-light-promoted gas-phase water splitting using porous WO 3 /BiVO 4 photoanodes. Electrochem commun 2017. [DOI: 10.1016/j.elecom.2017.07.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Zhang Y, Yi Z, Wu G, Shen Q. Novel Y doped BiVO4 thin film electrodes for enhanced photoelectric and photocatalytic performance. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Yuan D, Xiao L, Luo J, Luo Y, Meng Q, Mao BW, Zhan D. High-Throughput Screening and Optimization of Binary Quantum Dots Cosensitized Solar Cell. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18150-18156. [PMID: 27355523 DOI: 10.1021/acsami.6b06029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Quantum dots (QDs) are considered as the alternative of dye sensitizers for solar cells. However, interfacial construction and evaluation of photocatalytic nanomaterials still remains challenge through the conventional methodology involving demo devices. We propose here a high-throughput screening and optimizing method based on combinatorial chemistry and scanning electrochemical microscopy (SECM). A homogeneous TiO2 catalyst layer is coated on a FTO substrate, which is then covered by a dark mask to expose the photocatalyst array. On each photocatalyst spot, different successive ionic layer adsorption and reaction (SILAR) processes are performed by a programmed solution dispenser to load the binary PbxCd1-xS QDs sensitizers. An optical fiber is employed as the scanning tip of SECM, and the photocatalytic current is recorded during the imaging experiment, through which the optimized technical parameters are figured out. To verify the validity of the combinatorial SECM imaging results, the controlled trials are performed with the corresponding photovoltaic demo devices. The harmonious accordance proved that the methodology based on combinatorial chemistry and SECM is valuable for the interfacial construction, high-throughput screening, and optimization of QDSSCs. Furthermore, the PbxCd1-xS/CdS QDs cosensitized solar cell optimized by SECM achieves a short circuit current density of 24.47 mA/cm(2), an open circuit potential of 421 mV, a fill factor of 0.52, and a photovoltaic conversion efficiency of 5.33%.
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Affiliation(s)
- Ding Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Lina Xiao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Jianheng Luo
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Yanhong Luo
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Qingbo Meng
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Bing-Wei Mao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Dongping Zhan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
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