1
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Arulkumar E, Thanikaikarasan S, Rajkumar S, Wondimu W. Influence of solution pH dependency on structure, optical with photoelectrochemical characteristics of SILAR deposited copper oxide thin films. Heliyon 2024; 10:e33579. [PMID: 39040338 PMCID: PMC11260933 DOI: 10.1016/j.heliyon.2024.e33579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/23/2024] [Accepted: 06/24/2024] [Indexed: 07/24/2024] Open
Abstract
Photoelectrochemical (PEC) technology is a promising approach for converting solar energy into chemical energy, offering significant potential for renewable energy applications. In this work, the CuO thin film was fabricated with different pH value in between 8.5 ± 0.1 and 10.5 ± 0.1 via Successive Ionic Layer Adsorption and Reaction (SILAR) method. The Effect of pH on thickness, structural, morphological, elemental composition and optical properties were investigated by using stylus profilometry, XRD, SEM, TEM, EDX, UV-vis and PL. The XRD results showed that as the pH increased, the crystallite size increased from 19.24 nm to 25.62 nm, with a monoclinic phase along the (111) direction. The CuO film deposited at pH value 10.5 ± 0.1 exhibit well defined identical particle with its size in the range between 200 and 300 nm was confirmed by SEM and TEM analysis. As the pH increased from 8.5 ± 0.1 to 10.5 ± 0.1, the CuO film bandgap (Eg) value reduced from 1.52 eV to 1.42 eV with indirect transition. The CuO photocathode deposited at pH 10.5 ± 0.1 shows maximum photocurrent density of 1.45 mA/cm2 at -0.1 V vs. RHE in 0.5 M Na2SO4 solution. Furthermore, the Electrochemical Impedance Spectroscopy (EIS) analysis shows, the CuO (pH 10.5 ± 0.1) electrode have higher conductivity value of 0.6862 S/cm compared CuO at pH 8.5 ± 0.1 (0.2779 S/cm) and CuO at pH 9.5 ± 0.1 (0.4646 S/cm) electrodes.
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Affiliation(s)
- E. Arulkumar
- Department of Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602 105, Tamil Nadu, India
| | - S. Thanikaikarasan
- Department of Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602 105, Tamil Nadu, India
| | - S. Rajkumar
- Department of Mechanical Engineering, Faculty of Manufacturing, Institute of Technology, Hawassa University, Hawassa, Ethiopia
| | - Wasihun Wondimu
- Department of Mechanical Engineering, Faculty of Manufacturing, Institute of Technology, Hawassa University, Hawassa, Ethiopia
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2
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Korell L, Lauterbach S, Timm J, Wang L, Mellin M, Kundmann A, Wu Q, Tian C, Marschall R, Hofmann JP, Osterloh FE, Einert M. On the structural evolution of nanoporous optically transparent CuO photocathodes upon calcination for photoelectrochemical applications. NANOSCALE ADVANCES 2024; 6:2875-2891. [PMID: 38817433 PMCID: PMC11134239 DOI: 10.1039/d4na00199k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 04/11/2024] [Indexed: 06/01/2024]
Abstract
Copper oxides are promising photocathode materials for solar hydrogen production due to their narrow optical band gap energy allowing broad visible light absorption. However, they suffer from severe photocorrosion upon illumination, mainly due to copper reduction. Nanostructuring has been proven to enhance the photoresponse of CuO photocathodes; however, there is a lack of precise structural control on the nanoscale upon sol-gel synthesis and calcination for achieving optically transparent CuO thin film photoabsorbers. In this study, nanoporous and nanocrystalline CuO networks were prepared by a soft-templating and dip-coating method utilizing poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (Pluronic® F-127) as a structure-directing agent, resulting for the first-time in uniformly structured, crack-free, and optically transparent CuO thin films. The photoelectrochemical properties of the nanoporous CuO frameworks were investigated as a function of the calcination temperature and film thickness, revealing important information about the photocurrent, photostability, and photovoltage. Based on surface photovoltage spectroscopy (SPV), the films are p-type and generate up to 60 mV photovoltage at 2.0 eV (0.050 mW cm-2) irradiation for the film annealed at 750 °C. For these high annealing temperatures, the nanocrystalline domains in the thin film structure are more developed, resulting in improved electronic quality. In aqueous electrolytes with or without methyl viologen (as a fast electron acceptor), CuO films show cathodic photocurrents of up to -2.4 mA cm-2 at 0.32 V vs. RHE (air mass (AM) 1.5). However, the photocurrents were found to be entirely due to photocorrosion of the films and decay to near zero over the course of 20 min under AM 1.5 illumination. These fundamental results on the structural and morphological development upon calcination provide a direction and show the necessity for further (surface) treatment of sol-gel derived CuO photocathodes for photoelectrochemical applications. The study demonstrates how to control the size of nanopores starting from mesopore formation at 400 °C to the evolution of macroporous frameworks at 750 °C.
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Affiliation(s)
- Lukas Korell
- Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt Otto-Berndt-Straße 3 64287 Darmstadt Germany
| | - Stefan Lauterbach
- Institute for Applied Geosciences, Geomaterial Science, Technical University of Darmstadt Schnittspahnstraße 9 64287 Darmstadt Germany
| | - Jana Timm
- Department of Chemistry, University of Bayreuth Universitätsstraße 30 95447 Bayreuth Germany
| | - Li Wang
- Department of Chemistry, University of California One Shields Avenue Davis CA 95616 USA
| | - Maximilian Mellin
- Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt Otto-Berndt-Straße 3 64287 Darmstadt Germany
| | - Anna Kundmann
- Department of Chemistry, University of California One Shields Avenue Davis CA 95616 USA
| | - Qingyang Wu
- Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt Otto-Berndt-Straße 3 64287 Darmstadt Germany
| | - Chuanmu Tian
- Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt Otto-Berndt-Straße 3 64287 Darmstadt Germany
| | - Roland Marschall
- Department of Chemistry, University of Bayreuth Universitätsstraße 30 95447 Bayreuth Germany
| | - Jan P Hofmann
- Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt Otto-Berndt-Straße 3 64287 Darmstadt Germany
| | - Frank E Osterloh
- Department of Chemistry, University of California One Shields Avenue Davis CA 95616 USA
| | - Marcus Einert
- Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt Otto-Berndt-Straße 3 64287 Darmstadt Germany
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3
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Thi LLD, Ho TH, Vu TV, Nguyen DLT, Tran MX, Rhim SH, Nguyen CD. P-incorporated CuO/Cu 2S heteronanorods as efficient electrocatalysts for the glucose oxidation reaction toward highly sensitive and selective glucose sensing. Phys Chem Chem Phys 2023; 26:249-260. [PMID: 38054775 DOI: 10.1039/d3cp04095j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Currently, tremendous efforts have been made to explore efficient glucose oxidation electrocatalysts for enzymeless glucose sensors to meet the urgent demands for accurate and fast detection of glucose in the fields of health care and environmental monitoring. In this work, an advanced nanostructured material based on the well-aligned CuO/Cu2S heteronanorods incorporated with P atoms is successfully synthesized on a copper substrate. The as-synthesized material shows high catalytic behavior accompanied by outstanding electrical conductivity. This, combined with the unique morphology of unstacked nanorod arrays, which endow the entire material with a greater number of exposed active sites, make the proposed material act as a highly efficient electrocatalyst for the glucose oxidation reaction. Density functional theory calculations demonstrate that P doping endows P-doped CuO/Cu2S with excellent electrical conductivity and glucose adsorption capability, significantly improving its catalytic performance. As a result, a non-enzymatic glucose sensor fabricated based on our proposed material exhibits a broad linear detection range (0.02-8.2 mM) and a low detection limit (0.95 μM) with a high sensitivity of 2.68 mA mM-1 cm-2 and excellent selectivity.
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Affiliation(s)
- L L D Thi
- Laboratory for Advanced Nanomaterials and Sustainable Energy Technologies, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam.
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Thi H Ho
- Laboratory for Computational Physics, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam
- Faculty of Mechanical - Electrical and Computer Engineering, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Tuan V Vu
- Laboratory for Computational Physics, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam
- Faculty of Mechanical - Electrical and Computer Engineering, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Dang L T Nguyen
- Laboratory for Advanced Nanomaterials and Sustainable Energy Technologies, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam.
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Minh Xuan Tran
- Laboratory for Advanced Nanomaterials and Sustainable Energy Technologies, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam.
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Sonny H Rhim
- Department of Physics and Energy Harvest Storage Research Center, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - C-D Nguyen
- The University of Danang - University of Science and Education, Danang 550000, Vietnam.
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4
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Son MK. Key Strategies on Cu 2O Photocathodes toward Practical Photoelectrochemical Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3142. [PMID: 38133039 PMCID: PMC10745550 DOI: 10.3390/nano13243142] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Cuprous oxide (Cu2O) has been intensively in the limelight as a promising photocathode material for photoelectrochemical (PEC) water splitting. The state-of-the-art Cu2O photocathode consists of a back contact layer for transporting the holes, an overlayer for accelerating charge separation, a protection layer for prohibiting the photocorrosion, and a hydrogen evolution reaction (HER) catalyst for reducing the overpotential of HER, as well as a Cu2O layer for absorbing sunlight. In this review, the fundamentals and recent research progress on these components of efficient and durable Cu2O photocathodes are analyzed in detail. Furthermore, key strategies on the development of Cu2O photocathodes for the practical PEC water-splitting system are suggested. It provides the specific guidelines on the future research direction for the practical application of a PEC water-splitting system based on Cu2O photocathodes.
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Affiliation(s)
- Min-Kyu Son
- Nano Convergence Materials Center, Emerging Materials R&D Division, Korea Institute of Ceramic Engineering & Technology (KICET), Jinju 52851, Republic of Korea
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5
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Zhao Y, Niu Z, Zhao J, Xue L, Fu X, Long J. Recent Advancements in Photoelectrochemical Water Splitting for Hydrogen Production. ELECTROCHEM ENERGY R 2023. [DOI: 10.1007/s41918-022-00153-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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6
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Bandaranayake S, Patnaik A, Hruska E, Zhu Q, Sokolov AY, Baker LR. Electronic Structure and Ultrafast Electron Dynamics in CuO Photocatalysts Probed by Surface Sensitive Femtosecond X-ray Absorption Near-Edge Structure Spectroscopy. J Phys Chem Lett 2023; 14:3643-3650. [PMID: 37027816 DOI: 10.1021/acs.jpclett.2c03857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
CuO is often employed as a photocathode for H2 evolution and CO2 reduction, but observed efficiency is still far below the theoretical limit. To bridge the gap requires understanding the CuO electronic structure; however, computational efforts lack consensus on the orbital character of the photoexcited electron. In this study, we measure the femtosecond XANES spectra of CuO at the Cu M2,3 and O L1 edges to track the element-specific dynamics of electrons and holes. Results show that photoexcitation represents an O 2p to Cu 4s charge transfer state indicating the conduction band electron has primarily Cu 4s character. We also observe ultrafast mixing of Cu 3d and 4s conduction band states mediated by coherent phonons, with Cu 3d character of the photoelectron reaching a maximum of 16%. This is the first observation of the photoexcited redox state in CuO, and results provide a benchmark for theory where electronic structure modeling still relies heavily on model-dependent parametrization.
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Affiliation(s)
- Savini Bandaranayake
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Ananya Patnaik
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Emily Hruska
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Quansong Zhu
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Alexander Yu Sokolov
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - L Robert Baker
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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7
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Mustafa E, Dawi EA, Ibupoto ZH, Ibrahim AMM, Elsukova A, Liu X, Tahira A, Adam RE, Willander M, Nur O. Efficient CuO/Ag 2WO 4 photoelectrodes for photoelectrochemical water splitting using solar visible radiation. RSC Adv 2023; 13:11297-11310. [PMID: 37057263 PMCID: PMC10088074 DOI: 10.1039/d3ra00867c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 04/03/2023] [Indexed: 04/15/2023] Open
Abstract
Water splitting energy production relies heavily on the development of high-performance photoelectrochemical cells (PECs). Among the most highly regarded semiconductor materials, cupric oxide (CuO) is an excellent photocathode material. Pristine CuO does not perform well as a photocathode due to its tendency to recombine electrons and holes rapidly. Photocathodes with high efficiency can be produced by developing CuO-based composite systems. The aim of our research is to develop an Ag2WO4/CuO composite by incorporating silver tungstate (Ag2WO4) nanoparticles onto hydrothermally grown CuO nanoleaves (NLs) by successive ionic layer adsorption and reaction (SILAR). To prepare CuO/Ag2WO4 composites, SILAR was used in conjunction with different Ag2WO4 nanoparticle deposition cycles. Physicochemical characterization reveals well-defined nanoleaves morphologies with tailored surface compositions. Composite CuO/Ag2WO4 crystal structures are governed by the monoclinic phase of CuO and the hexagonal phase of Ag2WO4. It has been demonstrated that the CuO/Ag2WO4 composite has outstanding performance in the PEC water splitting process when used with five cycles. In the CuO/Ag2WO4 photocathode, water splitting activity is observed at low overpotential and high photocurrent density, indicating that the reaction takes place at low energy barriers. Several factors contribute to PEC performance in composites. These factors include the high density of surface active sites, the high charge separation rate, the presence of favourable surface defects, and the synergy of CuO and Ag2WO4 photoreaction. By using SILAR, silver tungstate can be deposited onto semiconducting materials with strong visible absorption, enabling the development of energy-efficient photocathodes.
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Affiliation(s)
- E Mustafa
- Department of Sciences and Technology, Linköping University, Campus Norrköping SE-601 74 Norrköping Sweden
| | - E A Dawi
- Nonlinear Dynamics Research Centre (NDRC), Ajman University P. O. Box 346 United Arab Emirates
| | - Z H Ibupoto
- Institute of Chemistry, University of Sindh 76080 Jamshoro Pakistan
| | - A M M Ibrahim
- Department of Pharmaceutical Chemistry, Jazan University P. O. Box 346 Kingdom of Saudi Arabia
| | - A Elsukova
- Department of Physics, Chemistry and Biology, Linköping University SE-58183 Linköping Sweden
| | - X Liu
- Department of Sciences and Technology, Linköping University, Campus Norrköping SE-601 74 Norrköping Sweden
| | - A Tahira
- Institute of Chemistry, Shah Abdul Latif University Khairpur Mirs 66020 Sindh Pakistan
| | - R E Adam
- Department of Sciences and Technology, Linköping University, Campus Norrköping SE-601 74 Norrköping Sweden
| | - M Willander
- Department of Sciences and Technology, Linköping University, Campus Norrköping SE-601 74 Norrköping Sweden
| | - O Nur
- Department of Sciences and Technology, Linköping University, Campus Norrköping SE-601 74 Norrköping Sweden
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8
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Zheng Z, Morgan M, Maji P, Xia X, Zu X, Zhou W. CuO nanorod arrays by gas-phase cation exchange for efficient photoelectrochemical water splitting. RSC Adv 2023; 13:3487-3493. [PMID: 36756593 PMCID: PMC9871730 DOI: 10.1039/d2ra07648a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/13/2023] [Indexed: 01/25/2023] Open
Abstract
CuO has been considered a promising candidate for photoelectrochemical water splitting electrodes owing to its suitable bandgap, favorable band alignments, and earth-abundant nature. In this paper, a novel gas-phase cation exchange method was developed to synthesize CuO nanorod arrays by using ZnO nanorod arrays as the template. ZnO nanorods were fully converted to CuO nanorods with aspect ratios of 10-20 at the temperature range from 350 to 600 °C. The as-synthesized CuO nanorods exhibit a photocurrent as high as 2.42 mA cm-2 at 0 V vs. RHE (reversible hydrogen electrode) under 1.5 AM solar irradiation, demonstrating the potential as the photoelectrode for efficient photoelectrochemical water splitting. Our method provides a new approach for the rational fabrication of high-performance CuO-based nanodevices.
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Affiliation(s)
- Zhi Zheng
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China Huzhou 313001 P. R. China .,Department of Physics, Advanced Materials Research Institute, University of New Orleans New Orleans LA 70148 USA .,School of Physics, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Mikhail Morgan
- Department of Physics, Advanced Materials Research Institute, University of New Orleans New Orleans LA 70148 USA
| | - Pramathesh Maji
- Department of Physics, Advanced Materials Research Institute, University of New Orleans New Orleans LA 70148 USA
| | - Xiang Xia
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China Huzhou 313001 P. R. China .,School of Physics, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Xiaotao Zu
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China Huzhou 313001 P. R. China .,School of Physics, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Weilie Zhou
- Department of Physics, Advanced Materials Research Institute, University of New Orleans New Orleans LA 70148 USA
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9
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Lu Y, Hu X, Tang L, Peng B, Tang J, Zeng T, Liu Q. Effect of CuO/ZnO/FTO electrode properties on the performance of a photo-microbial fuel cell sensor for the detection of heavy metals. CHEMOSPHERE 2022; 302:134779. [PMID: 35513075 DOI: 10.1016/j.chemosphere.2022.134779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 04/23/2022] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
The development of sustainable, low-cost and responsive technology for heavy metals detection in wastewater is crucial. In this study, by combining CuO/ZnO photocathode with microbial anode, a novel photo-microbial fuel cell (PMFC) sensor was developed. The self-powered PMFC was performed under light and dark condition for heavy metals detection. Compared with MFC sensor, PMFC sensor showed a wider detection range (0.1-4 mg L-1 of Cd2+ and 10-80 mg L-1 of Cu2+). The improved performance in sensing limit and sensitivity was mainly attributed to the intimate P-N heterojunctions formed in CuO/ZnO, which accelerated the electron transport between the photocathode and the microbial anode. Besides, the toxicity of five heavy metals tested in PMFC was shown as Cd2+>Cr6+>Zn2+>Hg2+>Cu2+. This study has taken advantage of the characteristics of PMFC and facilitated its application in heavy metals detection, which provides a new approach for the development of biosensors.
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Affiliation(s)
- Yue Lu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, Hunan, China.
| | - Xingxin Hu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, Hunan, China
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, Hunan, China.
| | - Bo Peng
- College of Geographic Science, Hunan Normal University, Changsha, 410081, PR China
| | - Jin Tang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, Hunan, China
| | - Taotao Zeng
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, Hunan, China
| | - Qian Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, Hunan, China
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10
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Approaches for Modifying Oxide-Semiconductor Materials to Increase the Efficiency of Photocatalytic Water Splitting. MATERIALS 2022; 15:ma15144915. [PMID: 35888381 PMCID: PMC9324759 DOI: 10.3390/ma15144915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/08/2022] [Accepted: 07/12/2022] [Indexed: 12/18/2022]
Abstract
The constant increase in the amount of energy consumed and environmental problems associated with the use of fossil fuels determine the relevance of the search for alternative and renewable energy sources. One of these is hydrogen gas, which can be produced by sunlight-driven photocatalytic water splitting. The decisive role in the efficiency of the process is played by the properties of the photocatalyst. Oxide materials are widely used as photocatalysts due to their appropriate band structure, high-enough photochemical stability and corrosion resistance. However, the bandgap, crystallinity and the surface morphology of oxide materials are subject to improvement. Apart from the properties of the photocatalyst, the parameters of the process influence the hydrogen-production efficiency. This paper outlines the key ways to improve the characteristics of oxide-semiconductor photocatalysts with the optimum parameters of photocatalytic water splitting.
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11
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Wang Q, Zong X, Tian L, Han Y, Ding Y, Xu C, Tao R, Fan X. Fe 2 O 3 /FePO 4 /FeOOH Ternary Stepped Energy Band Heterojunction Photoanode with Cascade-Driven Charge Transfer and Enhanced Photoelectrochemical Performance. CHEMSUSCHEM 2022; 15:e202102377. [PMID: 35014210 DOI: 10.1002/cssc.202102377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/07/2022] [Indexed: 06/14/2023]
Abstract
Controlling the charge transfer pathway in semiconductors is an important method to improve charge separation efficiency and enhance photoelectrochemical activity. In this work, a Fe2 O3 /FePO4 /FeOOH nanorod photoanode with stepped energy band structure is prepared by a hydrothermal and water bath method. The charge separation efficiency of the ternary heterojunction is higher than that of the traditional type II heterojunction, which might be due to the efficient cascade charge transfer and separation effect of the ternary stepped energy band heterojunction. The H2 and O2 evolution rates for photoelectrochemical water splitting of Fe2 O3 /FePO4 /FeOOH photoanode are 0.247 and 0.111 μmol min-1 , which is 2.15 and 1.95 times that of the Fe2 O3 /FePO4 photoanode, respectively. The incident photocurrent efficiency (IPCE) of Fe2 O3 /FePO4 /FeOOH photoanode under 365 nm light irradiation is 1.5 and 1.8 times that of Fe2 O3 /FePO4 and Fe2 O3 /FeOOH photoanodes, respectively. This work provides an attractive strategy for solar energy conversion to construct efficient photoelectrochemical photoanode materials.
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Affiliation(s)
- Qian Wang
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
| | - Xiaohang Zong
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
| | - Li Tian
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
| | - Yu Han
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
- Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials, Liaoning University, Shenyang, 110036, P. R. China
| | - Yong Ding
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
| | - Chao Xu
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
| | - Ran Tao
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
- Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials, Liaoning University, Shenyang, 110036, P. R. China
| | - Xiaoxing Fan
- School of Physics, Liaoning University, Shenyang, 110036, P. R. China
- Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials, Liaoning University, Shenyang, 110036, P. R. China
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12
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Hadia NMA, Abdelazeez AAA, Alzaid M, Shaban M, Mohamed SH, Hoex B, Hajjiah A, Rabia M. Converting Sewage Water into H 2 Fuel Gas Using Cu/CuO Nanoporous Photocatalytic Electrodes. MATERIALS (BASEL, SWITZERLAND) 2022; 15:1489. [PMID: 35208029 PMCID: PMC8879772 DOI: 10.3390/ma15041489] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/05/2022] [Accepted: 02/10/2022] [Indexed: 11/17/2022]
Abstract
This work reports on H2 fuel generation from sewage water using Cu/CuO nanoporous (NP) electrodes. This is a novel concept for converting contaminated water into H2 fuel. The preparation of Cu/CuO NP was achieved using a simple thermal combustion process of Cu metallic foil at 550 °C for 1 h. The Cu/CuO surface consists of island-like structures, with an inter-distance of 100 nm. Each island has a highly porous surface with a pore diameter of about 250 nm. X-ray diffraction (XRD) confirmed the formation of monoclinic Cu/CuO NP material with a crystallite size of 89 nm. The prepared Cu/CuO photoelectrode was applied for H2 generation from sewage water achieving an incident to photon conversion efficiency (IPCE) of 14.6%. Further, the effects of light intensity and wavelength on the photoelectrode performance were assessed. The current density (Jph) value increased from 2.17 to 4.7 mA·cm-2 upon raising the light power density from 50 to 100 mW·cm-2. Moreover, the enthalpy (ΔH*) and entropy (ΔS*) values of Cu/CuO electrode were determined as 9.519 KJ mol-1 and 180.4 JK-1·mol-1, respectively. The results obtained in the present study are very promising for solving the problem of energy in far regions by converting sewage water to H2 fuel.
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Affiliation(s)
- N. M. A. Hadia
- Physics Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia;
- Basic Sciences Research Unit, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia
| | - Ahmed Adel A. Abdelazeez
- Nanoscale Science, University of North Carolina at Charlotte, Charlotte, NC 28223, USA;
- State Key Lab of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Meshal Alzaid
- Physics Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia;
| | - Mohamed Shaban
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; (M.S.); (M.R.)
- Department of Physics, Faculty of Science, Islamic University of Madinah, Prince Naifbin Abdulaziz, Al Jamiah, Madinah 42351, Saudi Arabia;
| | - S. H. Mohamed
- Department of Physics, Faculty of Science, Islamic University of Madinah, Prince Naifbin Abdulaziz, Al Jamiah, Madinah 42351, Saudi Arabia;
- Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Bram Hoex
- School of Photovoltaics and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia;
| | - Ali Hajjiah
- Electrical Engineering Department, College of Engineering and Petroleum, Kuwait University, Safat 13113, Kuwait
| | - Mohamed Rabia
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; (M.S.); (M.R.)
- Nanomaterials Science Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
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13
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Zhao L, Chen Y, Wu X, Li Z, Dong Y, Wang GL. Invoking Cathodic Photoelectrochemistry through a Spontaneously Coordinated Electron Transporter: A Proof of Concept Toward Signal Transduction for Bioanalysis. Anal Chem 2021; 93:17119-17126. [PMID: 34908413 DOI: 10.1021/acs.analchem.1c04750] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Most of the cathodic photoelectrochemical (PEC) bioassays rely on electron accepting molecules for signal stimuli; unfortunately, the performances of which are still undesirable. New signal transduction strategies are still highly expected for the further development of cathodic photoelectrochemistry as a potentially competitive method. This work represents a new concept of invoked cathodic photoelectrochemistry by a spontaneously formed electron transporter for innovative operation of the sensing strategy. Specifically, the hexacyanoferrate(II) in solution easily self-coordinated with CuO nanomaterials and formed electron transporting copper hexacyanoferrate (CuHCF) on the surface, which endowed improved carrier separation for presenting augmented photocurrent readout. Exemplified by the T4 polynucleotide kinase (T4 PNK) and its inhibitors as targets, a homogenous cathodic PEC biosensing platform was achieved with the distinctive merits of label-free, immobilization-free, and split-mode readout. The mechanism revealed here provided a totally different perspective for signal transduction in cathodic photoelectrochemistry. Hopefully, it may stimulate more interests in the design and construction of semiconductor/transporter counterparts for exquisite operation of photocathodic bioanalysis.
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Affiliation(s)
- Lingling Zhao
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Yanru Chen
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiuming Wu
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Zaijun Li
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Yuming Dong
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Guang-Li Wang
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.,Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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14
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Jia H, Wong YL, Wang B, Xing G, Tsoi CC, Wang M, Zhang W, Jian A, Sang S, Lei D, Zhang X. Enhanced solar water splitting using plasmon-induced resonance energy transfer and unidirectional charge carrier transport. OPTICS EXPRESS 2021; 29:34810-34825. [PMID: 34809262 DOI: 10.1364/oe.440777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Solar water splitting by photoelectrochemical (PEC) reactions is promising for hydrogen production. The gold nanoparticles (AuNPs) are often applied to promote the visible response of wideband photocatalysts. However, in a typical TiO2/AuNPs structure, the opposite transfer direction of excited electrons between AuNPs and TiO2 under visible light and UV light severely limits the solar PEC performance. Here we present a unique Pt/TiO2/Cu2O/NiO/AuNPs photocathode, in which the NiO hole transport layer (HTL) is inserted between AuNPs and Cu2O to achieve unidirectional transport of charge carriers and prominent plasmon-induced resonance energy transfer (PIRET) between AuNPs and Cu2O. The measured applied bias photon-to-current efficiency and the hydrogen production rate under AM 1.5G illumination can reach 1.5% and 16.4 μmol·cm-2·h-1, respectively. This work is original in using the NiO film as the PIRET spacer and provides a promising photoelectrode for energy-efficient solar water splitting.
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15
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Divyapriya G, Singh S, Martínez-Huitle CA, Scaria J, Karim AV, Nidheesh PV. Treatment of real wastewater by photoelectrochemical methods: An overview. CHEMOSPHERE 2021; 276:130188. [PMID: 33743419 DOI: 10.1016/j.chemosphere.2021.130188] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/24/2021] [Accepted: 03/03/2021] [Indexed: 06/12/2023]
Abstract
An inadequate and inefficient performance ability of conventional methods to remove persistent organic pollutants urges the need of alternative or complementary advanced wastewater treatments methods to ensure the safer reuse of reclaimed water. Photoelectrochemical methods are emerging as promising options among other advanced oxidation processes because of the higher treatment efficiency achieved due to the synergistic effects of combined photochemical and electrolysis reactions. Synergistic effects of integrated photochemical, electrochemical and photoelectrochemical processes not only increase the hydroxyl radical production; an enhancement on the mineralization ability through various side reactions is also achieved. In this review, fundamental reaction mechanisms of different photoelectrochemical methods including photoelectrocatalysis, photo/solar electro-Fenton, photo anodic oxidation, photoelectroperoxone and photocatalytic fuel cell are discussed. Various integrated photochemical, electrochemical and photoelectrochemical processes and their synergistic effects are elaborated. Different reactor configurations along with the positioning of electrodes, photocatalysts and light source of the individual/combined photoelectrochemical treatment systems are discussed. Modified photoanode and cathode materials used in the photoelectrochemical reactors and their performance ability is presented. Photoelectrochemical treatment of real wastewater such as landfill leachate, oil mill, pharmaceutical, textile, and tannery wastewater are reviewed. Hydrogen production efficiency in the photoelectrochemical process is further elaborated. Cost and energy involved in these processes are briefed, but the applicability of photocatalytic fuel cells to reduce the electrical dependence is also summarised. Finally, the use of photoelectrochemical approaches as an alternative for treating soil washing effluents is currently discussed.
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Affiliation(s)
- G Divyapriya
- Virginia Polytechnic Institute and State University, USA
| | - Seema Singh
- Omvati Devi Degree College, Bhalaswagaj, Haridwar, India
| | - Carlos A Martínez-Huitle
- Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil.
| | - Jaimy Scaria
- CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
| | - Ansaf V Karim
- Environmental Science and Engineering Department, Indian Institute of Technology, Bombay, India
| | - P V Nidheesh
- CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India.
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16
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Siavash Moakhar R, Hosseini-Hosseinabad SM, Masudy-Panah S, Seza A, Jalali M, Fallah-Arani H, Dabir F, Gholipour S, Abdi Y, Bagheri-Hariri M, Riahi-Noori N, Lim YF, Hagfeldt A, Saliba M. Photoelectrochemical Water-Splitting Using CuO-Based Electrodes for Hydrogen Production: A Review. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007285. [PMID: 34117806 DOI: 10.1002/adma.202007285] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 12/25/2020] [Indexed: 06/12/2023]
Abstract
The cost-effective, robust, and efficient electrocatalysts for photoelectrochemical (PEC) water-splitting has been extensively studied over the past decade to address a solution for the energy crisis. The interesting physicochemical properties of CuO have introduced this promising photocathodic material among the few photocatalysts with a narrow bandgap. This photocatalyst has a high activity for the PEC hydrogen evolution reaction (HER) under simulated sunlight irradiation. Here, the recent advancements of CuO-based photoelectrodes, including undoped CuO, doped CuO, and CuO composites, in the PEC water-splitting field, are comprehensively studied. Moreover, the synthesis methods, characterization, and fundamental factors of each classification are discussed in detail. Apart from the exclusive characteristics of CuO-based photoelectrodes, the PEC properties of CuO/2D materials, as groups of the growing nanocomposites in photocurrent-generating devices, are discussed in separate sections. Regarding the particular attention paid to the CuO heterostructure photocathodes, the PEC water splitting application is reviewed and the properties of each group such as electronic structures, defects, bandgap, and hierarchical structures are critically assessed.
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Affiliation(s)
- Roozbeh Siavash Moakhar
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
- Non-Metallic Materials Research Group, Niroo Research Institute (NRI), Tehran, 14686-13113, Iran
| | | | - Saeid Masudy-Panah
- Electrical and Computer Engineering, National University of Singapore, Singapore, 119260, Singapore
- Low Energy Electronic Systems (LEES), Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore, 38602, Singapore
| | - Ashkan Seza
- Non-Metallic Materials Research Group, Niroo Research Institute (NRI), Tehran, 14686-13113, Iran
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Ave, Tehran, 11155-9466, Iran
| | - Mahsa Jalali
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
| | - Hesam Fallah-Arani
- Non-Metallic Materials Research Group, Niroo Research Institute (NRI), Tehran, 14686-13113, Iran
| | - Fatemeh Dabir
- Non-Metallic Materials Research Group, Niroo Research Institute (NRI), Tehran, 14686-13113, Iran
| | - Somayeh Gholipour
- Nanophysics Research Laboratory, Department of Physics, University of Tehran, Tehran, 14395-547, Iran
| | - Yaser Abdi
- Nanophysics Research Laboratory, Department of Physics, University of Tehran, Tehran, 14395-547, Iran
| | - Mohiedin Bagheri-Hariri
- Institute for Corrosion and Multiphase flow Technology, Department of Chemical and Biomedical Engineering, Ohio University, Athens, OH, 45701, USA
| | - Nastaran Riahi-Noori
- Non-Metallic Materials Research Group, Niroo Research Institute (NRI), Tehran, 14686-13113, Iran
| | - Yee-Fun Lim
- Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Anders Hagfeldt
- Laboratory of Photomolecular Science, Ecole Polytechnique Fédérale de Lausanne, EPFL SB-ISIC-LSPM, Station 6, Lausanne, 1015, Switzerland
| | - Michael Saliba
- Institute for Photovoltaics, University of Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany
- Helmholtz Young Investigator Group FRONTRUNNER IEK5-Photovoltaik, Forschungszentrum, D-52425, Jülich, Germany
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17
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García-Espinoza JD, Robles I, Durán-Moreno A, Godínez LA. Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review. CHEMOSPHERE 2021; 274:129957. [PMID: 33979920 PMCID: PMC8121763 DOI: 10.1016/j.chemosphere.2021.129957] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 05/04/2023]
Abstract
Disinfection is usually the final step in water treatment and its effectiveness is of paramount importance in ensuring public health. Chlorination, ultraviolet (UV) irradiation and ozone (O3) are currently the most common methods for water disinfection; however, the generation of toxic by-products and the non-remnant effect of UV and O3 still constitute major drawbacks. Photo-assisted electrochemical advanced oxidation processes (EAOPs) on the other hand, appear as a potentially effective option for water disinfection. In these processes, the synergism between electrochemically produced active species and photo-generated radicals, improve their performance when compared with the corresponding separate processes and with other physical or chemical approaches. In photo-assisted EAOPs the inactivation of pathogens takes place by means of mechanisms that occur at different distances from the anode, that is: (i) directly at the electrode's surface (direct oxidation), (ii) at the anode's vicinity by means of electrochemically generated hydroxyl radical species (quasi-direct), (iii) or at the bulk solution (away from the electrode surface) by photo-electrogenerated active species (indirect oxidation). This review addresses state of the art reports concerning the inactivation of pathogens in water by means of photo-assisted EAOPs such as photo-electrocatalytic process, photo-assisted electrochemical oxidation, photo-electrocoagulation and cathodic processes. By focusing on the oxidation mechanism, it was found that while quasi-direct oxidation is the preponderant inactivation mechanism, the photo-electrocatalytic process using semiconductor materials is the most studied method as revealed by numerous reports in the literature. Advantages, disadvantages, trends and perspectives for water disinfection in photo-assisted EAOPs are also analyzed in this work.
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Affiliation(s)
- Josué Daniel García-Espinoza
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703, Pedro Escobedo, Querétaro, Mexico
| | - Irma Robles
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703, Pedro Escobedo, Querétaro, Mexico
| | | | - Luis A Godínez
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703, Pedro Escobedo, Querétaro, Mexico.
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18
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Photoelectrochemical Hydrogen Production by Screen-Printed Copper Oxide Electrodes. ENERGIES 2021. [DOI: 10.3390/en14102942] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this work, copper oxides-based photocathodes for photoelectrochemical cells (PEC) were produced for the first time by screen printing. A total 7 × 10−3 g/m2 glycerine trioleate was found as optimum deflocculant amount to assure stable and homogeneous inks, based on CuO nano-powder. The inks were formulated considering different binder amounts and deposited producing films with homogenous thickness, microstructure, and roughness. The as-produced films were thermally treated to obtain Cu2O- and Cu2O/CuO-based electrodes. The increased porosity obtained by adding higher amounts of binder in the ink positively affected the electron transfer from the surface of the electrode to the electrolyte, thus increasing the corresponding photocurrent values. Moreover, the Cu2O/CuO system showed a higher charge carrier and photocurrent density than the Cu2O-based one. The mixed Cu2O/CuO films allowed the most significant hydrogen production, especially in slightly acid reaction conditions.
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19
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Quiñonero J, Pastor FJ, Orts JM, Gómez R. Photoelectrochemical Behavior and Computational Insights for Pristine and Doped NdFeO 3 Thin-Film Photocathodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14150-14159. [PMID: 33728897 PMCID: PMC8485327 DOI: 10.1021/acsami.0c21792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
Among the different strategies that are being developed to solve the current energy challenge, harvesting energy directly from sunlight through a tandem photoelectrochemical cell (water splitting) is most attractive. Its implementation requires the development of stable and efficient photocathodes, NdFeO3 being a suitable candidate among ternary oxides. In this study, transparent NdFeO3 thin-film photocathodes have been successfully prepared by a citric acid-based sol-gel procedure, followed by thermal treatment in air at 640 °C. These electrodes show photocurrents for both the hydrogen evolution and oxygen reduction reactions. Doping with Mg2+ and Zn2+ has been observed to significantly enhance the photoelectrocatalytic performance of NdFeO3 toward oxygen reduction. Magnesium is slightly more efficient as a dopant than Zn, leading to a multiplication of the photocurrent by a factor of 4-5 for a doping level of 5 at % (with respect to iron atoms). This same trend is observed for hydrogen evolution. The beneficial effect of doping is primarily attributed to an increase in the density and a change in the nature of the majority charge carriers. DFT calculations help to rationalize the behavior of NdFeO3 by pointing to the importance of nanostructuring and doping. All in all, NdFeO3 has the potential to be used as a photocathode in photoelectrochemical applications, although efforts should be directed to limit surface recombination.
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Affiliation(s)
- Javier Quiñonero
- Departament
de Química Física, Institut Universitari d’Electroquímica, Universitat d’Alacant, Apartat 99, E-03080 Alicante, Spain
| | - Francisco J. Pastor
- Departament
de Química Física, Institut Universitari d’Electroquímica, Universitat d’Alacant, Apartat 99, E-03080 Alicante, Spain
| | - José M. Orts
- Departament
de Química Física, Institut Universitari d’Electroquímica, Universitat d’Alacant, Apartat 99, E-03080 Alicante, Spain
| | - Roberto Gómez
- Departament
de Química Física, Institut Universitari d’Electroquímica, Universitat d’Alacant, Apartat 99, E-03080 Alicante, Spain
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20
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Bae H, Burungale V, Na W, Rho H, Kang SH, Ryu SW, Ha JS. Nanostructured CuO with a thin g-C 3N 4 layer as a highly efficient photocathode for solar water splitting. RSC Adv 2021; 11:16083-16089. [PMID: 36042848 PMCID: PMC9355345 DOI: 10.1039/d1ra02193a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 04/24/2021] [Indexed: 12/30/2022] Open
Abstract
A g-C3N4/CuO nanostructure featuring improved photoelectrochemical properties was successfully prepared using a facile and cost-effective method involving electrodeposition and thermal oxidation.
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Affiliation(s)
- Hyojung Bae
- Optoelectronics Convergence Research Center
- Chonnam National University
- Gwangju 61186
- Korea
- School of Chemical Engineering
| | - Vishal Burungale
- School of Chemical Engineering
- Chonnam National University
- Gwangju 61186
- Korea
| | - Wonkyeong Na
- School of Chemical Engineering
- Chonnam National University
- Gwangju 61186
- Korea
| | - Hokyun Rho
- Energy Convergence Core Facility
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Soon Hyung Kang
- Optoelectronics Convergence Research Center
- Chonnam National University
- Gwangju 61186
- Korea
| | - Sang-Wan Ryu
- Optoelectronics Convergence Research Center
- Chonnam National University
- Gwangju 61186
- Korea
| | - Jun-Seok Ha
- Optoelectronics Convergence Research Center
- Chonnam National University
- Gwangju 61186
- Korea
- School of Chemical Engineering
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21
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Han J, Xing H, Song Q, Yan H, Kang J, Guo Y, Liu Z. A ZnO@CuO core–shell heterojunction photoanode modified with ZnFe-LDH for efficient and stable photoelectrochemical performance. Dalton Trans 2021; 50:4593-4603. [DOI: 10.1039/d1dt00336d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A highly efficient ZnO@CuO core–shell heterojunction photoanode modified with cocatalyst ZnFe-layered double hydroxides was designed and synthesized in this work.
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Affiliation(s)
- Jianhua Han
- College of Science
- Civil Aviation University of China
- Tianjin
- China
| | - Haiyang Xing
- School of Materials Science and Engineering & Tianjin Key Laboratory of Building Green Functional Materials
- Tianjin Chengjian University
- Tianjin
- China
| | - Qinggong Song
- College of Science
- Civil Aviation University of China
- Tianjin
- China
| | - Huiyu Yan
- College of Science
- Civil Aviation University of China
- Tianjin
- China
| | - Jianhai Kang
- College of Science
- Civil Aviation University of China
- Tianjin
- China
| | - Yanrui Guo
- College of Science
- Civil Aviation University of China
- Tianjin
- China
| | - Zhifeng Liu
- College of Science
- Civil Aviation University of China
- Tianjin
- China
- School of Materials Science and Engineering & Tianjin Key Laboratory of Building Green Functional Materials
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22
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The Optical and Electrical Performance of CuO Synthesized by Anodic Oxidation Based on Copper Foam. MATERIALS 2020; 13:ma13235411. [PMID: 33261204 PMCID: PMC7730794 DOI: 10.3390/ma13235411] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 11/29/2022]
Abstract
Metal oxide semiconductor materials have a wide range of applications in the field of solar energy conversion. In this paper, CuO was prepared directly on copper foam substrate by anodic oxidation. The effects of current density and anodizing temperature on sample preparation and performance were studied. Field emission scanning electron microscopy (FESEM) and X-ray diffractometer (XRD) had been used to determine the morphology and phase structure of the sample, and its optical and electrical properties were discussed through UV-vis spectrophotometer and electrochemical tests. In addition, the influences of experimental conditions such as current density and reaction temperature on the morphology and properties of CuO were systematically discussed. The FESEM images showed that as the anodic oxidation temperature increase, the morphology of the prepared sample changed from nanowires to leaf-like CuO nanosheets. According to the results of XRD, the structure of prepared CuO was monoclinic, and the intensity of diffraction peaks gradually increased as anodizing temperature increased. We found that the optimum current density and anodizing temperature were 20 mA cm−2 and 60 °C, respectively. The results of electrochemical indicated that the CuO electrode based on copper foam (CuO/Cu foam) prepared at the optimum exhibited the highest specific capacitance (0.1039 F cm−2) when the scan rate was 2 mV s−1.
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23
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Hao S, Zhang H, Sun X, Zhai J, Dong S. A Photoelectrochemical Fuel Cell Based on a CuO Photocathode for Sustainable Resources Utilization. ChemElectroChem 2020. [DOI: 10.1002/celc.202001309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Shuai Hao
- State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
| | - He Zhang
- State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
| | - Xiaoxuan Sun
- State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
| | - Junfeng Zhai
- State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
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24
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Pollutants degradation and power generation by photocatalytic fuel cells: A comprehensive review. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.07.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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25
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Katal R, Masudy-Panah S, Sabbaghan M, Hossaini Z, Davood Abadi Farahani MH. Photocatalytic degradation of triclosan by oxygen defected CuO thin film. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117239] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Aktar A, Ahmmed S, Hossain J, Ismail ABM. Solution-Processed Synthesis of Copper Oxide (Cu x O) Thin Films for Efficient Photocatalytic Solar Water Splitting. ACS OMEGA 2020; 5:25125-25134. [PMID: 33043191 PMCID: PMC7542592 DOI: 10.1021/acsomega.0c02754] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
This article reports a solution-processed synthesis of copper oxide (Cu x O) to be used as a potential photocathode for solar hydrogen production in the solar water-splitting system. Cu x O thin films were synthesized through the reduction of copper iodide (CuI) thin films by sodium hydroxide (NaOH), which were deposited by the spin coating method from CuI solution in a polar aprotic solvent (acetonitrile). The phase and crystalline quality of the synthesized Cu x O thin films prepared at various annealing temperatures were investigated using various techniques. The X-ray diffraction and energy dispersive X-ray spectroscopy studies confirm the presence of Cu2O, CuO/Cu2O mixed phase, and pure CuO phase at annealing temperatures of 250, 300, and 350 °C, respectively. It is revealed from the experimental findings that the synthesized Cu x O thin films with an annealing temperature of 350 °C possess the highest crystallinity, smooth surface morphology, and higher carrier density. The highest photocurrent density of -19.12 mA/cm2 at -1 V versus RHE was achieved in the photoelectrochemical solar hydrogen production system with the use of the Cu x O photocathode annealed at a temperature of 350 °C. Therefore, it can be concluded that Cu x O synthesized by the spin coating method through the acetonitrile solvent route can be used as an efficient photocathode in the solar water-splitting system.
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Affiliation(s)
- Asma Aktar
- Solar Energy Laboratory, Department
of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Shamim Ahmmed
- Solar Energy Laboratory, Department
of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Jaker Hossain
- Solar Energy Laboratory, Department
of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Abu Bakar Md. Ismail
- Solar Energy Laboratory, Department
of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
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27
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Fang G, Liu Z, Han C, Ma X, Lv H, Huang C, Cheng Z, Tong Z, Wang P. CoNiO 2 as a novel water oxidation cocatalyst to enhance PEC water splitting performance of BiVO 4. Chem Commun (Camb) 2020; 56:9158-9161. [PMID: 32657301 DOI: 10.1039/d0cc03516e] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A strategy is proposed for modifying BiVO4 photoanode with CoNiO2 as a novel water oxidation cocatalyst to enhance PEC water splitting performance. The results show that CoNiO2 has the following functions: reducing photogenerated charge recombination centers; providing trapping sites to promote charge separation; improving the stability of the overall system; providing more active sites; and offering a lower overpotential. The BiVO4/CoNiO2 photoanode has a higher photocurrent density (1.16 mA cm-2 at 1.23 V vs. RHE), a lower onset potential (∼0.06 V vs. RHE), a larger IPCE (34.37%) and ABPE (0.163%), better stability and good rates of hydrogen evolution (0.0148 μmol cm-2 min-1) and oxygen evolution (0.0076 μmol cm-2 min-1). The strategy provides promising prospects for achieving efficient PEC water splitting performance using water oxidation cocatalysts.
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Affiliation(s)
- Guozhen Fang
- School of Science, Hubei University of Technology, Wuhan, 430068, China.
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28
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CuO/CuBi2O4 heterojunction photocathode: High stability and current densities for solar water splitting. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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29
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Kampmann J, Betzler S, Hajiyani H, Häringer S, Beetz M, Harzer T, Kraus J, Lotsch BV, Scheu C, Pentcheva R, Fattakhova-Rohlfing D, Bein T. How photocorrosion can trick you: a detailed study on low-bandgap Li doped CuO photocathodes for solar hydrogen production. NANOSCALE 2020; 12:7766-7775. [PMID: 32215409 DOI: 10.1039/c9nr10250g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The efficiency of photoelectrochemical tandem cells is still limited by the availability of stable low band gap electrodes. In this work, we report a photocathode based on lithium doped copper(ii) oxide, a black p-type semiconductor. Density functional theory calculations with a Hubbard U term show that low concentrations of Li (Li0.03Cu0.97O) lead to an upward shift of the valence band maximum that crosses the Fermi level and results in a p-type semiconductor. Therefore, Li doping emerged as a suitable approach to manipulate the electronic structure of copper oxide based photocathodes. As this material class suffers from instability in water under operating conditions, the recorded photocurrents are repeatedly misinterpreted as hydrogen evolution evidence. We investigated the photocorrosion behavior of LixCu1-xO cathodes in detail and give the first mechanistic study of the fundamental physical process. The reduced copper oxide species were localized by electron energy loss spectroscopy mapping. Cu2O grows as distinct crystallites on the surface of LixCu1-xO instead of forming a dense layer. Additionally, there is no obvious Cu2O gradient inside the films, as Cu2O seems to form on all LixCu1-xO nanocrystals exposed to water. The application of a thin Ti0.8Nb0.2Ox coating by atomic layer deposition and the deposition of a platinum co-catalyst increased the stability of LixCu1-xO against decomposition. These devices showed a stable hydrogen evolution for 15 minutes.
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Affiliation(s)
- Jonathan Kampmann
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 (E), 81377 Munich, Germany.
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30
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Lam SM, Sin JC, Lin H, Li H, Zeng H. Greywater and bacteria removal with synchronized energy production in photocatalytic fuel cell based on anodic TiO 2/ZnO/Zn and cathodic CuO/Cu. CHEMOSPHERE 2020; 245:125565. [PMID: 31855765 DOI: 10.1016/j.chemosphere.2019.125565] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 12/04/2019] [Accepted: 12/06/2019] [Indexed: 05/03/2023]
Abstract
An approach that can recuperate of energy from wastewater treatment process is highly necessitate and would help to surmount the both environmental pollution and energy crisis issues. A photocatalytic fuel cell (PFC) employing an anodic TiO2/ZnO/Zn and a cathodic CuO/Cu has been applied to degrade the raw greywater, which realized advanced organics destruction, bacteria disinfection, and synchronously electricity production. The improved photocatalytic performance has been observed when the cell was incorporated with anodic TiO2/ZnO/Zn under UV and sunlight irradiation due to the enhanced electric field conductivity of the catalysts and heterojunction interface of TiO2. In the constructed UV-activated PFC system, the electricity production capability was observed with the measured voltage and power density of 868 mV and 0.0172 mW cm-2, respectively. Advanced chemical oxygen demand (COD) removal efficiency of greywater achieved a 100% completion within 60 min of light irradiation. The Escherichia coli (E. coli) colonies decreased significantly and accounted ∼99% disinfection efficiency. Moreover, the photoelectrochemical and photoluminescence (PL) experiments elucidated that the charge carrier separation efficiency were higher when TiO2 was coupled to ZnO. The organic matter elimination principle was assessed by radical trapping experiment, and the findings indicated that the hydroxyl (OH) radical and hole (h+) appeared as major functions in the reaction. The stable cycle operation of the cell has been also obtained owing to the stable and film-type materials of anodic material. This performance was among the highest documented for PFC using real wastewater effluent as the fuel source.
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Affiliation(s)
- Sze-Mun Lam
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst area, Guilin University of Technology, Guilin, 541004, China; Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
| | - Jin-Chung Sin
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst area, Guilin University of Technology, Guilin, 541004, China; Department of Petrochemical Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia
| | - Hua Lin
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst area, Guilin University of Technology, Guilin, 541004, China
| | - Haixiang Li
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst area, Guilin University of Technology, Guilin, 541004, China
| | - Honghu Zeng
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst area, Guilin University of Technology, Guilin, 541004, China.
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31
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Explicating charge transfer dynamics in anodic TiO2/ZnO/Zn photocatalytic fuel cell for ameliorated palm oil mill effluent treatment and synchronized energy generation. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112353] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Dalapati GK, Masudy‐Panah S, Moakhar RS, Chakrabortty S, Ghosh S, Kushwaha A, Katal R, Chua CS, Xiao G, Tripathy S, Ramakrishna S. Nanoengineered Advanced Materials for Enabling Hydrogen Economy: Functionalized Graphene-Incorporated Cupric Oxide Catalyst for Efficient Solar Hydrogen Production. GLOBAL CHALLENGES (HOBOKEN, NJ) 2020; 4:1900087. [PMID: 32140256 PMCID: PMC7050082 DOI: 10.1002/gch2.201900087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 12/24/2019] [Indexed: 06/10/2023]
Abstract
Cupric oxide (CuO) is a promising candidate as a photocathode for visible-light-driven photo-electrochemical (PEC) water splitting. However, the stability of the CuO photocathode against photo-corrosion is crucial for developing CuO-based PEC cells. This study demonstrates a stable and efficient photocathode through the introduction of graphene into CuO film (CuO:G). The CuO:G composite electrodes are prepared using graphene-incorporated CuO sol-gel solution via spin-coating techniques. The graphene is modified with two different types of functional groups, such as amine (-NH2) and carboxylic acid (-COOH). The -COOH-functionalized graphene incorporation into CuO photocathode exhibits better stability and also improves the photocurrent generation compare to control CuO electrode. In addition, -COOH-functionalized graphene reduces the conversion of CuO phase into cuprous oxide (Cu2O) during photo-electrochemical reaction due to effective charge transfer and leads to a more stable photocathode. The reduction of CuO to Cu2O phase is significantly lesser in CuO:G-COOH as compared to CuO and CuO:G-NH2 photocathodes. The photocatalytic degradation of methylene blue (MB) by CuO, CuO:G-NH2 and CuO:G-COOH is also investigated. By integrating CuO:G-COOH photocathode with a sol-gel-deposited TiO2 protecting layer and Au-Pd nanostructure, stable and efficient photocathode are developed for solar hydrogen generation.
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Affiliation(s)
- Goutam Kumar Dalapati
- Department of PhysicsSRM University – APAmaravatiAndhra Pradesh522502India
- Institute of Materials Research and EngineeringA*STAR (Agency for Science, Technology and Research)2 Fusionopolis Way; Innovis, #08‐03Singapore138634Singapore
- School of Engineering & InnovationThe Open UniversityMilton KeynesMK7 6AAUK
- Center for Nanofibers and NanotechnologyFaculty of EngineeringNational University of SingaporeSingapore117576Singapore
| | - Saeid Masudy‐Panah
- Energy Electronic Systems (LEES)Singapore‐MIT Alliance for Research and Technology (SMART) Centre1 CREATE Way, #09‐01/02 CREATE TowerSingapore138602Singapore
- Electrical and Computer EngineeringNational University of SingaporeSingapore119260Singapore
| | - Roozbeh Siavash Moakhar
- Department of Materials Science and EngineeringSharif University of TechnologyTehran11155‐9466Iran
| | | | - Siddhartha Ghosh
- Department of PhysicsSRM University – APAmaravatiAndhra Pradesh522502India
| | - Ajay Kushwaha
- Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of Technology IndoreSimrolIndoreMadhya Pradesh453552India
| | - Reza Katal
- Department of Civil & Environmental EngineeringNational University of SingaporeSingapore119260Singapore
| | - Chin Sheng Chua
- Institute of Materials Research and EngineeringA*STAR (Agency for Science, Technology and Research)2 Fusionopolis Way; Innovis, #08‐03Singapore138634Singapore
| | - Gong Xiao
- Energy Electronic Systems (LEES)Singapore‐MIT Alliance for Research and Technology (SMART) Centre1 CREATE Way, #09‐01/02 CREATE TowerSingapore138602Singapore
- Electrical and Computer EngineeringNational University of SingaporeSingapore119260Singapore
| | - Sudhiranjan Tripathy
- Institute of Materials Research and EngineeringA*STAR (Agency for Science, Technology and Research)2 Fusionopolis Way; Innovis, #08‐03Singapore138634Singapore
| | - Seeram Ramakrishna
- Center for Nanofibers and NanotechnologyFaculty of EngineeringNational University of SingaporeSingapore117576Singapore
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33
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CuO/NiOx thin film–based photocathodes for photoelectrochemical water splitting. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04513-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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34
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An S, Joshi B, Yarin AL, Swihart MT, Yoon SS. Supersonic Cold Spraying for Energy and Environmental Applications: One-Step Scalable Coating Technology for Advanced Micro- and Nanotextured Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905028. [PMID: 31747097 PMCID: PMC6980375 DOI: 10.1002/adma.201905028] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 09/09/2019] [Indexed: 05/17/2023]
Abstract
Supersonic cold spraying is an emerging technique for rapid deposition of films of materials including micrometer-size and sub-micrometer metal particles, nanoscale ceramic particles, clays, polymers, hybrid materials composed of polymers and particulates, reduced graphene oxide (rGO), and metal-organic frameworks. In this method, particles are accelerated to a high velocity and then impact a substrate at near ambient temperature, where dissipation of their kinetic energy produces strong adhesion. Here, recent progress in fundamentals and applications of cold spraying is reviewed. High-velocity impact with the substrate results in significant deformation, which not only produces adhesion, but can change the particles' internal structure. Cold-sprayed coatings can also exhibit micro- and nanotextured morphologies not achievable by other means. Suspending micro- or nanoparticles in a liquid and cold-spraying the suspension produces fine atomization and even deposition of materials that could not otherwise be processed. The scalability and low cost of this method and its compatibility with roll-to-roll processing make it promising for many applications, including ultrathin flexible materials, solar cells, touch-screen panels, nanotextured surfaces for enhanced heat transfer, thermal and electrical insulation films, transparent conductive films, materials for energy storage (e.g., Li-ion battery electrodes), heaters, sensors, photoelectrodes for water splitting, water purification membranes, and self-cleaning films.
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Affiliation(s)
- Seongpil An
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL, 60607-7022, USA
| | - Bhavana Joshi
- Department of Physics, NES Science College, Snehnagar, Nanded, 431605, Maharashtra, India
| | - Alexander L Yarin
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL, 60607-7022, USA
| | - Mark T Swihart
- Department of Chemical and Biological Engineering and RENEW Institute, University at Buffalo, The State University of New York, Buffalo, NY, 14260-4200, USA
| | - Sam S Yoon
- School of Mechanical Engineering, Korea University, Seoul, 02841, Republic of Korea
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35
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Liu J, Xia M, Chen R, Zhu X, Liao Q, Ye D, Zhang B, Zhang W, Yu Y. A membrane-less visible-light responsive micro photocatalytic fuel cell with the laterally-arranged CdS/ZnS-TiO2 photoanode and air-breathing CuO photocathode for simultaneous wastewater treatment and electricity generation. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115821] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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36
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Tomita R, Pu Z, Kamegawa T, Anpo M, Higashimoto S. Photoelectrochemical properties of copper oxide (CuO) influenced by work functions of conductive electrodes. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-04012-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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37
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Shinde S, Yadav H, Ghodake G, Kadam A, Kumbhar V, Yang J, Hwang K, Jagadale A, Kumar S, Kim D. Using chemical bath deposition to create nanosheet-like CuO electrodes for supercapacitor applications. Colloids Surf B Biointerfaces 2019; 181:1004-1011. [DOI: 10.1016/j.colsurfb.2019.05.079] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 10/26/2022]
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38
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Dasineh Khiavi N, Katal R, Kholghi Eshkalak S, Masudy-Panah S, Ramakrishna S, Jiangyong H. Visible Light Driven Heterojunction Photocatalyst of CuO-Cu 2O Thin Films for Photocatalytic Degradation of Organic Pollutants. NANOMATERIALS 2019; 9:nano9071011. [PMID: 31337085 PMCID: PMC6669717 DOI: 10.3390/nano9071011] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 11/16/2022]
Abstract
A high recombination rate and low charge collection are the main limiting factors of copper oxides (cupric and cuprous oxide) for the photocatalytic degradation of organic pollutants. In this paper, a high performance copper oxide photocatalyst was developed by integrating cupric oxide (CuO) and cuprous oxide (Cu2O) thin films, which showed superior performance for the photocatalytic degradation of methylene blue (MB) compared to the control CuO and Cu2O photocatalyst. Our results show that a heterojunction photocatalyst of CuO–Cu2O thin films could significantly increase the charge collection, reduce the recombination rate, and improve the photocatalytic activity.
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Affiliation(s)
- Negar Dasineh Khiavi
- Faculty of Biosciences & Medical Engineering, University Technology Malaysia, Johor 81310, Malaysia
| | - Reza Katal
- Department of Civil & Environmental Engineering, National University of Singapore, Singapore 119260, Singapore
| | - Saeideh Kholghi Eshkalak
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117575, Singapore
| | - Saeid Masudy-Panah
- Electrical and Computer Engineering, National University of Singapore, Singapore 119260, Singapore
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117575, Singapore.
| | - Hu Jiangyong
- Department of Civil & Environmental Engineering, National University of Singapore, Singapore 119260, Singapore.
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39
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Basu M. Porous Cupric Oxide: Efficient Photocathode for Photoelectrochemical Water Splitting. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900103] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Mrinmoyee Basu
- Department of ChemistryBITS Pilani, Pilani Campus Rajasthan- 333031 India
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40
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Hubička Z, Zlámal M, Čada M, Kment Š, Krýsa J. Photo-electrochemical stability of copper oxide photocathodes deposited by reactive high power impulse magnetron sputtering. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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41
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Zhang F, Chen Y, Zhou W, Ren C, Gao H, Tian G. Hierarchical SnS 2/CuInS 2 Nanosheet Heterostructure Films Decorated with C 60 for Remarkable Photoelectrochemical Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9093-9101. [PMID: 30758936 DOI: 10.1021/acsami.8b21222] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Rational architectural design and catalyst components are beneficial to improve the photoelectrochemical (PEC) performance. Herein, hierarchical SnS2/CuInS2 nanosheet heterostructure porous films were fabricated and decorated with C60 to form photocathodes for PEC water reduction. Large-size CuInS2 nanosheet films were first grown on transparent conducting glass to form substrate films. Then, small-size SnS2 nanosheets were epitaxially grown on both sides of the CuInS2 nanosheets to form uniform hierarchical porous laminar films. The addition of C60 on the surface of the SnS2/CuInS2 porous nanosheets effectively increased visible light absorption of the composite photocathode. Photoluminescence spectroscopy and impedance spectroscopy analyses indicated that the formation of a SnS2/CuInS2 heterojunction and decoration of C60 significantly increased the photocurrent density by promoting the electron-hole separation and decreasing the resistance to the transport of charge carriers. The hierarchical SnS2/CuInS2 nanosheet heterostructure porous films containing multiscale nanosheets and pore configurations can enlarge the surface area and enhance visible light utilization. These beneficial factors make the optimized C60-decorated SnS2/CuInS2 photocathode exhibit much higher photocathodic current (4.51 mA cm-2 at applied potential -0.45 V vs reversible hydrogen electrode ) and stability than the individual CuInS2 (2.58 mA cm-2) and SnS2 (1.92 mA cm-2) nanosheet film photocathodes. This study not only reveals the promise of C60-decorated hierarchical SnS2/CuInS2 nanosheet heterostructure porous film photocathodes for efficient solar energy harvesting and conversion but also provides rational guidelines in designing high-efficiency photoelectrodes from earth-abundant and low-cost materials allowing widely practical applications.
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Affiliation(s)
- Fangfang Zhang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China
| | - Yajie Chen
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China
| | - Wei Zhou
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China
| | - Can Ren
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China
| | - Haijing Gao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China
| | - Guohui Tian
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China
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42
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Sawant SY, Sayed MS, Han TH, Karim MR, Shim JJ, Cho MH. Bio-synthesis of finely distributed Ag nanoparticle-decorated TiO2 nanorods for sunlight-induced photoelectrochemical water splitting. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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43
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Xing H, E L, Guo Z, Zhao D, Li X, Liu Z. Exposing the photocorrosion mechanism and control strategies of a CuO photocathode. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00780f] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A CuO photocathode modified with TiO2 and Pt displays superior photocorrosion stability in PEC water splitting.
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Affiliation(s)
- Haiyang Xing
- School of Materials Science and Engineering
- Tianjin Chengjian University
- Tianjin
- China
| | - Lei E
- School of Materials Science and Engineering
- Tianjin Chengjian University
- Tianjin
- China
- Tianjin Key Laboratory of Building Green Functional Materials
| | - Zhengang Guo
- School of Materials Science and Engineering
- Tianjin Chengjian University
- Tianjin
- China
- Tianjin Key Laboratory of Building Green Functional Materials
| | - Dan Zhao
- School of Materials Science and Engineering
- Tianjin Chengjian University
- Tianjin
- China
| | - Xifei Li
- Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering
- Xi'an University of Technology
- Xi'an
- China
| | - Zhifeng Liu
- School of Materials Science and Engineering
- Tianjin Chengjian University
- Tianjin
- China
- Tianjin Key Laboratory of Building Green Functional Materials
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44
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Kee MW, Soo JW, Lam SM, Sin JC, Mohamed AR. Evaluation of photocatalytic fuel cell (PFC) for electricity production and simultaneous degradation of methyl green in synthetic and real greywater effluents. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 228:383-392. [PMID: 30243074 DOI: 10.1016/j.jenvman.2018.09.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/27/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
Recycling of alternative water sources particularly greywater and recovery of energy from wastewater are gaining momentum due to clean water scarcity and energy crisis. In this study, the photocatalytic fuel cell (PFC) employing ZnO/Zn photoanode and CuO/Cu photocathode was successfully designed for effective greywater recycling as well as energy recovery. The photoelectrodes were analyzed using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and fourier transform infrared (FTIR) spectroscopy. The PFC performance in terms of electricity generation and parallel methyl green (MG) degradation were evaluated under operating parameters such as electrolyte type, initial MG concentration and solution pH. The results showed that the addition of Na2SO4 electrolyte, MG concentration of 40 mg L-1 and solution pH of 5.2 improved the short circuit current density (Jsc) and power density (Pmax) in the as-constructed PFC. Such a system also afforded highest MG and chemical oxygen demand (COD) removal efficiencies after 4 h of irradiation. The photoanodes used in this study demonstrated great recyclability after four repetition tests. The COD removal was reduced to some extents when the PFC treatment was tested in the real greywater under optimal conditions. Various greywater quality parameters including ammoniacal nitrogen (NH3-N), turbidity, pH and biochemical oxygen demand (BOD5) were also monitored. The phytotoxicity experiments via Vigna radiate seeds indicated a reduction in the phytotoxicity.
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Affiliation(s)
- Ming-Wei Kee
- Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan University, Bandar Barat, 31900, Kampar, Perak, Malaysia
| | - Jian-Wen Soo
- Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan University, Bandar Barat, 31900, Kampar, Perak, Malaysia
| | - Sze-Mun Lam
- Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan University, Bandar Barat, 31900, Kampar, Perak, Malaysia.
| | - Jin-Chung Sin
- Department of Petrochemical Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan University, Bandar Barat, 31900, Kampar, Perak, Malaysia
| | - Abdul Rahman Mohamed
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Pulau Pinang, Malaysia
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Synthesis of Self-Gravity Settling Faceted-Anatase TiO2 with Dominant {010} Facets for the Photocatalytic Degradation of Acetaminophen and Study of the Type of Generated Oxygen Vacancy in Faceted-TiO2. WATER 2018. [DOI: 10.3390/w10101462] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In this study, faceted TiO2, predominately exposed with {010} facets (T-{010}), was synthesized with a two-step hydrothermal reaction and used for the degradation of acetaminophen (ACE) in an aqueous solution. T-{010} showed considerable photocatalytic reactivity, and its easy-settling (gravity-settling, ~97% of T-{010} settled after 30 min) property demonstrated acceptable reusability. A solid-state chemical reduction approach (NaBH4) at a mild temperature (300 °C) was used for generation of an oxygen vacancy in T-{010} and P25 (commercial TiO2). The oxygen vacancy concentrations of the samples were investigated by electron paramagnetic resonance (EPR). It was also found that NaBH4 reduction induced the generation of both surface and subsurface Ti3+ on colored P25, but only surface Ti3+ species were formed on colored T-{010}. The prepared colored TiO2 samples were successfully used for photocatalytic degradation of ACE in an aqueous solution under visible light illumination.
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46
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Abstract
The oxygen evolution reaction (OER) is a complex multi-step four-electron process showing sluggish kinetics. Layered double hydroxides (LDH) were reported as promising catalysts for the OER, but their low electrical conductivity restricts their widespread applications. To overcome this problem, a composite material containing Mn-Co LDH ultrathin nanosheet and highly conductive graphene was synthesized for the first time. Benefited from the high electrocatalytic activity and the superior charge transfer ability induced by these components, the new material shows superior OER activity. Used as the OER catalyst, a high current density of 461 mA cm−2 at 2.0 V vs. RHE (reversible hydrogen electrode) was measured besides shows a low overpotential of 0.33 V at 10 mA cm−2. Moreover, the new composite also shows a superior bifunctional water splitting performance as catalyst for the OER and HER (hydrogen evolution reaction) catalysts. Our results indicate that the presented material is a promising candidate for water splitting which is cheap and efficient.
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Cots A, Bonete P, Gómez R. Improving the Stability and Efficiency of CuO Photocathodes for Solar Hydrogen Production through Modification with Iron. ACS APPLIED MATERIALS & INTERFACES 2018; 10:26348-26356. [PMID: 30016591 DOI: 10.1021/acsami.8b09892] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cupric oxide (CuO) is considered as a promising photocathode material for photo(electro)chemical water splitting because of its suitable band gap, low cost related to copper earth abundancy, and straightforward fabrication. The main challenge for the development of practical CuO-based photocathodes for solar hydrogen evolution is to enhance its stability against photocorrosion. In this work, stable and efficient CuO photocathodes have been developed by using a simple and cost-effective methodology. CuO films, composed of nanowires and prepared by chemical oxidation of electrodeposited Cu, develop relatively high photocurrents in 1 M NaOH. However, this photocurrent appears to be partly associated with photocorrosion of CuO. It is significant though that, even unprotected, a faradaic efficiency for hydrogen evolution of ∼45% is attained. The incorporation of iron through an impregnation method, followed by a high-temperature thermal treatment for promoting the external phase transition of the nanowires from CuO to ternary copper iron oxide, was found to provide an improved stability at the expense of photocurrent, which decreases to about one-third of its initial value. In contrast, a faradaic efficiency for hydrogen evolution of ∼100% is achieved even in the absence of co-catalysts, which is ascribable to the favorable band positions of CuO and the iron copper ternary oxide in the core-shell structure of the nanowires.
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Affiliation(s)
- Ainhoa Cots
- Departament de Química Física i Institut Universitari d'Electroquímica , Universitat d'Alacant , Apartat 99 , E-03080 Alacant , Spain
| | - Pedro Bonete
- Departament de Química Física i Institut Universitari d'Electroquímica , Universitat d'Alacant , Apartat 99 , E-03080 Alacant , Spain
| | - Roberto Gómez
- Departament de Química Física i Institut Universitari d'Electroquímica , Universitat d'Alacant , Apartat 99 , E-03080 Alacant , Spain
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48
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Jalali M, AbdelFatah T, Mahshid SS, Labib M, Sudalaiyadum Perumal A, Mahshid S. A Hierarchical 3D Nanostructured Microfluidic Device for Sensitive Detection of Pathogenic Bacteria. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801893. [PMID: 30048039 DOI: 10.1002/smll.201801893] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 06/11/2018] [Indexed: 05/28/2023]
Abstract
Efficient capture and rapid detection of pathogenic bacteria from body fluids lead to early diagnostics of bacterial infections and significantly enhance the survival rate. We propose a universal nano/microfluidic device integrated with a 3D nanostructured detection platform for sensitive and quantifiable detection of pathogenic bacteria. Surface characterization of the nanostructured detection platform confirms a uniform distribution of hierarchical 3D nano-/microisland (NMI) structures with spatial orientation and nanorough protrusions. The hierarchical 3D NMI is the unique characteristic of the integrated device, which enables enhanced capture and quantifiable detection of bacteria via both a probe-free and immunoaffinity detection method. As a proof of principle, we demonstrate probe-free capture of pathogenic Escherichia coli (E. coli) and immunocapture of methicillin-resistant-Staphylococcus aureus (MRSA). Our device demonstrates a linear range between 50 and 104 CFU mL-1 , with average efficiency of 93% and 85% for probe-free detection of E. coli and immunoaffinity detection of MRSA, respectively. It is successfully demonstrated that the spatial orientation of 3D NMIs contributes in quantifiable detection of fluorescently labeled bacteria, while the nanorough protrusions contribute in probe-free capture of bacteria. The ease of fabrication, integration, and implementation can inspire future point-of-care devices based on nanomaterial interfaces for sensitive and high-throughput optical detection.
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Affiliation(s)
- Mahsa Jalali
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
| | - Tamer AbdelFatah
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
| | - Sahar Sadat Mahshid
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, M5S 3M2, Canada
| | - Mahmoud Labib
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, M5S 3M2, Canada
| | | | - Sara Mahshid
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
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49
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Review on the criteria anticipated for the fabrication of highly efficient ZnO-based visible-light-driven photocatalysts. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.01.012] [Citation(s) in RCA: 525] [Impact Index Per Article: 87.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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50
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Kwon J, Cho H, Jung J, Lee H, Hong S, Yeo J, Han S, Ko SH. ZnO/CuO/M (M = Ag, Au) Hierarchical Nanostructure by Successive Photoreduction Process for Solar Hydrogen Generation. NANOMATERIALS 2018; 8:nano8050323. [PMID: 29757225 PMCID: PMC5977337 DOI: 10.3390/nano8050323] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 05/10/2018] [Accepted: 05/10/2018] [Indexed: 11/24/2022]
Abstract
To date, solar energy generation devices have been widely studied to meet a clean and sustainable energy source. Among them, water splitting photoelectrochemical cell is regarded as a promising energy generation way for splitting water molecules and generating hydrogen by sunlight. While many nanostructured metal oxides are considered as a candidate, most of them have an improper bandgap structure lowering energy transition efficiency. Herein, we introduce a novel wet-based, successive photoreduction process that can improve charge transfer efficiency by surface plasmon effect for a solar-driven water splitting device. The proposed process enables to fabricate ZnO/CuO/Ag or ZnO/CuO/Au hierarchical nanostructure, having an enhanced electrical, optical, photoelectrochemical property. The fabricated hierarchical nanostructures are demonstrated as a photocathode in the photoelectrochemical cell and characterized by using various analytic tools.
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Affiliation(s)
- Jinhyeong Kwon
- Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Hyunmin Cho
- Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Jinwook Jung
- Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Habeom Lee
- Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
| | - Sukjoon Hong
- Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan Gyeonggi-do 15588, Korea.
| | - Junyeob Yeo
- Novel Applied Nano Optics (NANO) Lab, Department of Physics, Kyungpook National University, 80 Daehak-ro, Bukgu, Daegu 41566, Korea.
| | - Seungyong Han
- Department of Mechanical Engineering, Ajou University, 206 Worldcupro, Yeongtong-gu, Suwon 16499, Korea.
| | - Seung Hwan Ko
- Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
- Department of Mechanical Engineering/Institute of Advanced Machinery and Design (SNU-IAMD), Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
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