1
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Explicating the importance of aeration and pH for Amaranth degradation and electricity generation in a viable hybrid system of photocatalytic fuel cell and electro-Fenton process. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116535] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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2
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Nanostructured polypyrrole cathode based dual rotating disk photo fuel cell for textile wastewater purification and electricity generation. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Zhang B, Fan W, Yao T, Liao S, Li A, Li D, Liu M, Shi J, Liao S, Li C. Design and Fabrication of a Dual-Photoelectrode Fuel Cell towards Cost-Effective Electricity Production from Biomass. CHEMSUSCHEM 2017; 10:99-105. [PMID: 27860457 DOI: 10.1002/cssc.201601422] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 11/16/2016] [Indexed: 05/03/2023]
Abstract
A photo fuel cell (PFC) offers an attractive way to simultaneously convert solar and biomass energy into electricity. Photocatalytic biomass oxidation on a semiconductor photoanode combined with dark electrochemical reduction of oxygen molecules on a metal cathode (usually Pt) in separated compartments is the common configuration for a PFC. Herein, we report a membrane-free PFC based on a dual electrode, including a W-doped BiVO4 photoanode and polyterthiophene photocathode for solar-stimulated biomass-to-electricity conversion. Air- and water-soluble biomass derivatives can be directly used as reagents. The optimal device yields an open-circuit voltage (VOC ) of 0.62 V, a short-circuit current density (JSC ) of 775 μA cm-2 , and a maximum power density (Pmax ) of 82 μW cm-2 with glucose as the feedstock under tandem illumination, which outperforms dual-photoelectrode PFCs previously reported. Neither costly separating membranes nor Pt-based catalysts are required in the proposed PFC architecture. Our work may inspire rational device designs for cost-effective electricity generation from renewable resources.
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Affiliation(s)
- Bingqing Zhang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
- The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P. R. China
| | - Wenjun Fan
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
- The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P. R. China
| | - Tingting Yao
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
| | - Shichao Liao
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
| | - Ailong Li
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
| | - Deng Li
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
| | - Mingyao Liu
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
- The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P. R. China
| | - Jingying Shi
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
| | - Shijun Liao
- The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P. R. China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P. R. China
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4
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Xia M, Chen R, Zhu X, Liao Q, An L, Wang Z, He X, Jiao L. A micro photocatalytic fuel cell with an air-breathing, membraneless and monolithic design. Sci Bull (Beijing) 2016. [DOI: 10.1007/s11434-016-1178-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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5
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Liu J, Wang Y, Deng Q, Zhu L, Chao H, Li H. Unique catalytic properties of a butoxy chain-containing ruthenated porphyrin towards oxidation of uric acid and reduction of dioxygen for visible light-enhanced fuel cells. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Zhu W, Chong B, Qin K, Guan L, Hou X, Chen GZ. Cuprous oxide/titanium dioxide nanotube-array with coaxial heterogeneous structure synthesized by multiple-cycle chemical adsorption plus reduction method. RSC Adv 2016. [DOI: 10.1039/c6ra06893f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report the formation and characterization of Cu2O/TiO2 nanotube-array coaxial heterogeneous structure, which is supposed to have potential applications in photo-induced water decomposition and organic pollutant degradation.
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Affiliation(s)
- Wen Zhu
- State Key Laboratory of Materials Processing and Die & Mould Technology
- Huazhong University of Science & Technology
- Wuhan 430074
- People's Republic of China
- Faculty of Engineering
| | - Baohe Chong
- State Key Laboratory of Materials Processing and Die & Mould Technology
- Huazhong University of Science & Technology
- Wuhan 430074
- People's Republic of China
| | - Ke Qin
- State Key Laboratory of Materials Processing and Die & Mould Technology
- Huazhong University of Science & Technology
- Wuhan 430074
- People's Republic of China
| | - Li Guan
- Faculty of Engineering
- University of Nottingham
- Nottingham
- UK
| | - Xianghui Hou
- Faculty of Engineering
- University of Nottingham
- Nottingham
- UK
| | - George Z. Chen
- Faculty of Engineering
- University of Nottingham
- Nottingham
- UK
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7
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Arabzadeh A, Salimi A, Ashrafi M, Soltanian S, Servati P. Enhanced visible light driven photoelectrocatalytic oxidation of ethanol at reduced graphene oxide/CdS nanowires decorated with Pt nanoparticles. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01693b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A ternary rGO/CdS NWs/Pt NPs nanocomposite is successfully synthesized via a template-free route and its application for electrocatalytic and photoelectrocatalytic oxidation of ethanol was developed.
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Affiliation(s)
- Abbas Arabzadeh
- Department of Chemistry
- University of Kurdistan
- 66177-15175 Sanandaj
- Iran
| | - Abdollah Salimi
- Department of Chemistry
- University of Kurdistan
- 66177-15175 Sanandaj
- Iran
- Research Center for Nanotechnology
| | - Maysam Ashrafi
- Department of Chemistry
- University of Kurdistan
- 66177-15175 Sanandaj
- Iran
| | - Saied Soltanian
- Department of Electrical and Computer Engineering
- University of British Columbia
- Vancouver
- Canada
| | - Peyman Servati
- Department of Electrical and Computer Engineering
- University of British Columbia
- Vancouver
- Canada
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8
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Hu C, Kelm D, Schreiner M, Wollborn T, Mädler L, Teoh WY. Designing Photoelectrodes for Photocatalytic Fuel Cells and Elucidating the Effects of Organic Substrates. CHEMSUSCHEM 2015; 8:4005-4015. [PMID: 26564312 DOI: 10.1002/cssc.201500793] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 08/14/2015] [Indexed: 06/05/2023]
Abstract
Photocatalytic fuel cells (PFCs) are constructed from anodized photoanodes with the aim of effectively converting organic materials into solar electricity. The syntheses of the photoanodes (TiO2 , WO3 , and Nb2 O5 ) were optimized using the statistical 2(k) factorial design. A systematic study was carried out to catalog the influence of eleven types of organic substrate on the photocurrent responses of the photoanodes, showing dependence on the adsorption of the organic substrates and on the associated photocatalytic degradation mechanisms. Strong adsorbates, such as carboxylic acids, generated high photocurrent enhancements. Simple and short-chained molecules, such as formic acid and methanol, are the most efficient in the corresponding carboxylic acid and alcohol groups as a result of their fast degradation kinetics. The TiO2 -based PFC yielded the highest photocurrent and obtainable power, whereas the Nb2 O5 -based PFC achieved the highest open-circuit voltage, which is consistent with its most negative Fermi level.
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Affiliation(s)
- Chenyan Hu
- Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Denis Kelm
- Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- Department of Production Engineering, University of Bremen, Bremen, Germany
| | - Manuel Schreiner
- Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- Department of Production Engineering, University of Bremen, Bremen, Germany
| | - Tobias Wollborn
- Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- Department of Production Engineering, University of Bremen, Bremen, Germany
| | - Lutz Mädler
- Department of Production Engineering, University of Bremen, Bremen, Germany
| | - Wey Yang Teoh
- Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR.
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9
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Zhang B, Shi J, Ding C, Chong R, Zhang B, Wang Z, Li A, Liang Z, Liao S, Li C. Conversion of Biomass Derivatives to Electricity in Photo Fuel Cells using Undoped and Tungsten-doped Bismuth Vanadate Photoanodes. CHEMSUSCHEM 2015; 8:4049-4055. [PMID: 26609790 DOI: 10.1002/cssc.201500942] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Indexed: 06/05/2023]
Abstract
The photo fuel cell (PFC) is a promising technology for simultaneously converting solar energy and bioenergy into electricity. Here, we present a miniature air-breathing PFC that uses either BiVO4 or W-doped BiVO4 as the photoanode and a Pt/C catalyst as the air-breathing cathode. The PFC exhibited excellent performance under solar illumination and when fed with several types of biomaterial. We found the PFC performance could be significantly enhanced using W-doping into the BiVO4 photoanode. With glucose as the fuel and simulated sunlight (AM 1.5 G) as the light source, the open-circuit voltage increased from 0.74 to 0.92 V, the short-circuit current density rose from 0.46 to 1.62 mA cm(-2) , and the maximum power density was boosted from 0.05 to 0.38 mW cm(-2) , compared to a PFC using undoped BiVO4 as the anode.
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Affiliation(s)
- Bingqing Zhang
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy Technology of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P.R. China
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Jingying Shi
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Chunmei Ding
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Ruifeng Chong
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Bao Zhang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Zhiliang Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Ailong Li
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
| | - Zhenxing Liang
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy Technology of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P.R. China
| | - Shijun Liao
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy Technology of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P.R. China.
| | - Can Li
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Shenyang, 116023, P.R. China
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10
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Li K, Zhang H, Tang T, Xu Y, Ying D, Wang Y, Jia J. Optimization and application of TiO₂/Ti-Pt photo fuel cell (PFC) to effectively generate electricity and degrade organic pollutants simultaneously. WATER RESEARCH 2014; 62:1-10. [PMID: 24926902 DOI: 10.1016/j.watres.2014.05.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 04/04/2014] [Accepted: 05/26/2014] [Indexed: 06/03/2023]
Abstract
A TiO2/Ti-Pt photo fuel cell (PFC) was established to generate electricity and degrade organic pollutants simultaneously. The electricity generation was optimized through investigation the influences of photoanode calcination temperature and dissolve oxygen on the resistances existing in PFC. TiO2 light quantum yield was also improved in PFC which resulted in a higher PC degradation efficiency. Two kinds of real textile wastewaters were also employed in this PFC system, 62.4% and 50.0% Coulombic efficiency were obtained for 8 h treatment. These refractory wastewaters with high salinity may become good fuels in PFC because a) TiO2 has no selectivity and can degrade nearly any organic substance, b) no more electrolyte is needed due to the high salinity, c) the energy in wastes can be recovered to generate electricity. The electricity generated by the PFC was further applied on a TiO2/Ti rotating disk photoelectrocatalytic reactor. A bias voltage between 0.6 and 0.75 V could be applied and the PC degradation efficiency was significantly improved. This result was similar with that obtained by a 0.7 V DC power.
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Affiliation(s)
- Kan Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Hongbo Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Tiantian Tang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Yunlan Xu
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400050, PR China
| | - Diwen Ying
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Yalin Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jinping Jia
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
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11
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Wang M, Batabyal SK, Li Z, Li D, Mhaisalkar SG, Lam YM. Nanocrystalline copper indium selenide (CuInSe2) particles for solar energy harvesting. RSC Adv 2013. [DOI: 10.1039/c3ra40961a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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12
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Nosaka AY, Tanaka G, Nosaka Y. The Behaviors of Glutathione and Related Amino Acids in the TiO2 Photocatalytic System. J Phys Chem B 2012; 116:11098-102. [DOI: 10.1021/jp3057338] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Atsuko Y. Nosaka
- Department
of Chemistry, Nagaoka University of Technology, Nagaoka, 940-2188 Japan
| | - Goro Tanaka
- Department
of Chemistry, Nagaoka University of Technology, Nagaoka, 940-2188 Japan
| | - Yoshio Nosaka
- Department
of Chemistry, Nagaoka University of Technology, Nagaoka, 940-2188 Japan
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13
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Photocatalysis and photoelectrocatalysis using nanocrystalline titania alone or combined with Pt, RuO2 or NiO co-catalysts. J APPL ELECTROCHEM 2012. [DOI: 10.1007/s10800-012-0408-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Direct Biomass Fuel Cell (BMFC) with Anode/Catalyst Comprising a Nanocomposite of a Mesoporous n-Semiconductor Film and a Metal Thin Layer: A New Concept of Catalyst Design. Catal Letters 2012. [DOI: 10.1007/s10562-012-0783-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Liu Y, Li J, Zhou B, Li X, Chen H, Chen Q, Wang Z, Li L, Wang J, Cai W. Efficient electricity production and simultaneously wastewater treatment via a high-performance photocatalytic fuel cell. WATER RESEARCH 2011; 45:3991-3998. [PMID: 21620432 DOI: 10.1016/j.watres.2011.05.004] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 05/03/2011] [Accepted: 05/05/2011] [Indexed: 05/30/2023]
Abstract
A great quantity of wastewater were discharged into water body, causing serious environmental pollution. Meanwhile, the organic compounds in wastewater are important sources of energy. In this work, a high-performance short TiO(2) nanotube array (STNA) electrode was applied as photoanode material in a novel photocatalytic fuel cell (PFC) system for electricity production and simultaneously wastewater treatment. The results of current work demonstrate that various model compounds as well as real wastewater samples can be used as substrates for the PFC system. As a representative of model compounds, the acetic acid solution produces the highest cell performance with short-circuit current density 1.42 mA cm(-2), open-circuit voltage 1.48 V and maximum power density output 0.67 mW cm(-2). The STNA photoanode reveals obviously enhanced cell performance compared with TiO(2) nanoparticulate film electrode or other long nanotubes electrode. Moreover, the photoanode material, electrolyte concentration, pH of the initial solution, and cathode material were found to be important factors influencing the system performance of PFC. Therefore, the proposed fuel cell system provides a novel way of energy conversion and effective disposal mode of organics and serves well as a promising technology for wastewater treatment.
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Affiliation(s)
- Yanbiao Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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16
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Kaneko M, Saito R, Ueno H, Nemoto J, Izuoka A. Efficient Photocatalytic Decomposition of Glucose, Starch, and Cellulose to CO2 Using a Mesoporous Semiconductor Thin Film. Catal Letters 2011. [DOI: 10.1007/s10562-011-0615-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Kaneko M, Ueno H, Nemoto J. Schottky junction/ohmic contact behavior of a nanoporous TiO(2) thin film photoanode in contact with redox electrolyte solutions. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2011; 2:127-34. [PMID: 21977423 PMCID: PMC3148041 DOI: 10.3762/bjnano.2.15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 02/12/2011] [Indexed: 05/03/2023]
Abstract
The nature and photoelectrochemical reactivity of nanoporous semiconductor electrodes have attracted a great deal of attention. Nanostructured materials have promising capabilities applicable for the construction of various photonic and electronic devices. In this paper, a mesoporous TiO(2) thin film photoanode was soaked in an aqueous methanol solution using an O(2)-reducing Pt-based cathode in contact with atmospheric air on the back side. It was shown from distinct photocurrents in the cyclic voltammogram (CV) that the nanosurface of the mesoporous n-TiO(2) film forms a Schottky junction with water containing a strong electron donor such as methanol. Formation of a Schottky junction (liquid junction) was also proved by Mott-Schottky plots at the mesoporous TiO(2) thin film photoanode, and the thickness of the space charge layer was estimated to be very thin, i.e., only 3.1 nm at -0.1 V vs Ag/AgCl. On the other hand, the presence of [Fe(CN)(6)](4-) and the absence of methanol brought about ohmic contact behavior on the TiO(2) film and exhibited reversible redox waves in the dark due to the [Fe(CN)(6)](4-/3-) couple. Further studies showed that multiple Schottky junctions/ohmic contact behavior inducing simultaneously both photocurrent and overlapped reversible redox waves was found in the CV of a nanoporous TiO(2) photoanode soaked in an aqueous redox electrolyte solution containing methanol and [Fe(CN)(6)](4-). That is, the TiO(2) nanosurface responds to [Fe(CN)(6)](4-) to give ohmic redox waves overlapped simultaneously with photocurrents due to the Schottky junction. Additionally, a second step photocurrent generation was observed in the presence of both MeOH and [Fe(CN)(6)](4-) around the redox potential of the iron complex. It was suggested that the iron complex forms a second Schottky junction for which the flat band potential (E(fb)) lies near the redox potential of the iron complex.
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Affiliation(s)
- Masao Kaneko
- The Institute of Biophotochemonics Co.Ltd., 2-1-1 Bunkyo, Mito, 310-8512 Japan
| | - Hirohito Ueno
- The Institute of Biophotochemonics Co.Ltd., 2-1-1 Bunkyo, Mito, 310-8512 Japan
| | - Junichi Nemoto
- The Institute of Biophotochemonics Co.Ltd., 2-1-1 Bunkyo, Mito, 310-8512 Japan
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18
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Liu Y, Li J, Zhou B, Chen H, Wang Z, Cai W. A TiO2-nanotube-array-based photocatalytic fuel cell using refractory organic compounds as substrates for electricity generation. Chem Commun (Camb) 2011; 47:10314-6. [DOI: 10.1039/c1cc13388h] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Fujiwara K, Osako Y, Sasaki T, Kumata H, Aoki M, Kawashima N. Construction of Photo-Decomposer for Organic Compounds in Natural Water and Evaluation of Its Performance by Chemiluminescence. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.1021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Kitao Fujiwara
- School of Life Sciences, Tokyo University of Pharmacy and Life sciences
| | - Yuta Osako
- School of Life Sciences, Tokyo University of Pharmacy and Life sciences
| | - Takana Sasaki
- School of Life Sciences, Tokyo University of Pharmacy and Life sciences
| | - Hidetoshi Kumata
- School of Life Sciences, Tokyo University of Pharmacy and Life sciences
| | - Motohide Aoki
- School of Life Sciences, Tokyo University of Pharmacy and Life sciences
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