The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Guang-li Wang - One of the best experts on this subject based on the ideXlab platform.
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High-throughput photoelectrochemical determination of E. coli O157:H7 by modulation of the anodic Photoelectrochemistry of CdS quantum dots via reversible deposition of MnO_2
Microchimica Acta, 2019Co-Authors: Gaoxia Yang, Yu Ming Dong, Zaijun Li, Hong Wang, Guang-li WangAbstract:A method is described for modulating the anodic Photoelectrochemistry of netlike CdS quantum dots through the deposition and dissolution of the electron acceptor manganese dioxide (MnO_2) on the surface of the photoelectrode. Specifically, the photocurrent of a CdS-modified indium tin oxide (ITO/CdS) electrode is inhibited by chemical deposition of MnO_2. However, the photocurrent becomes recovered by oxidative removal of MnO_2 with H_2O_2. This deposition-dissolution reaction modulates the Photoelectrochemistry of CdS effectively. A bioassay for Escherichia coli ( E. coli ) O157:H7 is designed that uses the antimicrobial peptide magainin I as the recognition element. Glucose oxidase (GOx) acts as a catalytic label tracer to produce the signaling molecule H_2O_2 in the microwell plates. The enzymatically generated H_2O_2 etches the deposited MnO_2 on the photoelectrode and thus enhances the photocurrent. This detection scheme does not cause any damage to biomolecules. It also avoids the adverse effects of immobilized biomolecules for retarding signal production and leads to improved detection when compared to conventional PEC configurations. E. coli can be detected in the 10 to 5.0 × 10^6 CFU·mL^−1 concentration range, and the limit of detection is 3 CFU·mL^−1. Graphical abstract Schematic representation of the photoelectrochemical assay of E. coli through the deposition and dissolution of electron accepting manganese dioxide (MnO_2) on the surface of the photoelectrode.
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High-throughput photoelectrochemical determination of E. coli O157:H7 by modulation of the anodic Photoelectrochemistry of CdS quantum dots via reversible deposition of MnO2.
Mikrochimica acta, 2019Co-Authors: Gaoxia Yang, Yu Ming Dong, Hong Wang, Guang-li WangAbstract:A method is described for modulating the anodic Photoelectrochemistry of netlike CdS quantum dots through the deposition and dissolution of the electron acceptor manganese dioxide (MnO2) on the surface of the photoelectrode. Specifically, the photocurrent of a CdS-modified indium tin oxide (ITO/CdS) electrode is inhibited by chemical deposition of MnO2. However, the photocurrent becomes recovered by oxidative removal of MnO2 with H2O2. This deposition-dissolution reaction modulates the Photoelectrochemistry of CdS effectively. A bioassay for Escherichia coli (E. coli) O157:H7 is designed that uses the antimicrobial peptide magainin I as the recognition element. Glucose oxidase (GOx) acts as a catalytic label tracer to produce the signaling molecule H2O2 in the microwell plates. The enzymatically generated H2O2 etches the deposited MnO2 on the photoelectrode and thus enhances the photocurrent. This detection scheme does not cause any damage to biomolecules. It also avoids the adverse effects of immobilized biomolecules for retarding signal production and leads to improved detection when compared to conventional PEC configurations. E. coli can be detected in the 10 to 5.0 × 106 CFU·mL−1 concentration range, and the limit of detection is 3 CFU·mL−1.
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Graphene oxide based photocathode for split photoelectrochemical bioanalysis
Electrochemistry Communications, 2018Co-Authors: Fang Li, Jun Xian Shu, Tian Tian Gu, Xiu Ming Wu, Yu Ming Dong, Guang-li WangAbstract:In contrast to the many studies employing heavy-metal-containing semiconductors in state-of-the-art Photoelectrochemistry, this work presents the first use of graphene oxide (GO) for advanced cathodic PEC analysis. The bioinspired redox reaction between GO and dopamine (DA) led to the formation of reduced GO (RGO) and the simultaneous deposition of the electron acceptor poly(dopamine) on RGO. This greatly stimulated the cathodic photocurrent of the GO-modified indium tin oxide (ITO) (ITO/GO) electrode, making it possible to detect DA rapidly and sensitively through a split Photoelectrochemistry strategy (i.e. the reaction between the analyte and the photoelectrode and the recording of the photocurrent signal are conducted in separate devices). This study indicates the great promise of GO by demonstrating an elegant sensing strategy involving an in situ redox reaction followed by PEC analysis. It is hoped that this may open up the exploration of carbon nanomaterials for innovative cathodic Photoelectrochemistry in the future.
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Graphene oxide based photocathode for split photoelectrochemical bioanalysis
Elsevier, 2018Co-Authors: Jun Xian Shu, Yu Ming Dong, Guang-li WangAbstract:In contrast to the many studies employing heavy-metal-containing semiconductors in state-of-the-art Photoelectrochemistry, this work presents the first use of graphene oxide (GO) for advanced cathodic PEC analysis. The bioinspired redox reaction between GO and dopamine (DA) led to the formation of reduced GO (RGO) and the simultaneous deposition of the electron acceptor poly(dopamine) on RGO. This greatly stimulated the cathodic photocurrent of the GO-modified indium tin oxide (ITO) (ITO/GO) electrode, making it possible to detect DA rapidly and sensitively through a split Photoelectrochemistry strategy (i.e. the reaction between the analyte and the photoelectrode and the recording of the photocurrent signal are conducted in separate devices). This study indicates the great promise of GO by demonstrating an elegant sensing strategy involving an in situ redox reaction followed by PEC analysis. It is hoped that this may open up the exploration of carbon nanomaterials for innovative cathodic Photoelectrochemistry in the future. Keywords: Graphene oxide, Cathodic Photoelectrochemistry, In situ redox reactio
Akira Fujishima - One of the best experts on this subject based on the ideXlab platform.
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heterogeneous photocatalysis from water photolysis to applications in environmental cleanup
International Journal of Hydrogen Energy, 2007Co-Authors: Akira Fujishima, Xintong Zhang, Donald A TrykAbstract:Water splitting and environmental cleanup are two active fields in heterogeneous photocatalysis, which are both closely related to the research in semiconductor Photoelectrochemistry since the 1960s. The present review paper will attempt to describe some of the progress and resulting achievements in these two fields, and to briefly discuss the future prospects. We will cover the major developments worldwide but will highlight work carried out in Japan over the last several years.
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x ray induced Photoelectrochemistry on tio2
Electrochimica Acta, 2007Co-Authors: Kazuhisa Tamura, Akira Fujishima, Yoshihisa Ohko, Hiroyuki Kawamura, Hideki Yoshikawa, Tetsu Tatsuma, Junichiro MizukiAbstract:Abstract The electrochemical behaviour of TiO2 under X-ray irradiation was studied. Under X-ray irradiation a current, a negative shift in the rest potential, and electrochemical oxidation and decomposition of [FeII(CN)6]4− were clearly observed. The incident photon-current conversion efficiency and energy conversion efficiency was 400–2000% and 0.2–2%, respectively, depending on sample conditions. These results show that the photoelectrochemical reactions were promoted by X-rays with a high incident photon-current conversion efficiency. The photocurrent and photopotential were observed above 4.965 keV, which corresponds to the Ti–K edge, indicating that electron-hole pairs are formed during the relaxation process of the excited Ti atoms.
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Recent topics in Photoelectrochemistry: achievements and future prospects
Electrochimica Acta, 2000Co-Authors: Donald A Tryk, Akira Fujishima, Kenichi HondaAbstract:Abstract The tremendous amount of research that has been carried out in the two closely related fields of semiconductor Photoelectrochemistry and photocatalysis during the past three decades continues to provide fundamental insights and practical applications. The present review paper will attempt to describe some of the progress and resulting achievements in these two areas and to briefly discuss the future prospects. In order to provide a focal point, we will highlight work carried out in Japan over the last 5 years. However, we will try as much as possible to put this work into a global and historical context by tracing some of the key developments that have occurred outside this relatively narrow scope. We should note at the outset that we have made no attempt to cover the underlying theory or physics of Photoelectrochemistry. Several excellent reviews have appeared during this same time period that cover fundamental and general aspects of Photoelectrochemistry and photocatalysis.
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Thin semiconductor films: photoeffects and new applications
Electrochimica Acta, 1994Co-Authors: Akira Fujishima, L. A. Nagahara, Hajime Yoshiki, Katsuhiro Ajito, Kazuhito HashimotoAbstract:Abstract Current topics in photochemistry and Photoelectrochemistry of thin semiconductor films are presented in regards to technological applications. Examples include photoelectrochemical reduction of CO 2 , photocatalytic applications for deodorization, metalization via photochemical reactions, and the photochromic behavior of MoO 3 .
Yu Ming Dong - One of the best experts on this subject based on the ideXlab platform.
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High-throughput photoelectrochemical determination of E. coli O157:H7 by modulation of the anodic Photoelectrochemistry of CdS quantum dots via reversible deposition of MnO_2
Microchimica Acta, 2019Co-Authors: Gaoxia Yang, Yu Ming Dong, Zaijun Li, Hong Wang, Guang-li WangAbstract:A method is described for modulating the anodic Photoelectrochemistry of netlike CdS quantum dots through the deposition and dissolution of the electron acceptor manganese dioxide (MnO_2) on the surface of the photoelectrode. Specifically, the photocurrent of a CdS-modified indium tin oxide (ITO/CdS) electrode is inhibited by chemical deposition of MnO_2. However, the photocurrent becomes recovered by oxidative removal of MnO_2 with H_2O_2. This deposition-dissolution reaction modulates the Photoelectrochemistry of CdS effectively. A bioassay for Escherichia coli ( E. coli ) O157:H7 is designed that uses the antimicrobial peptide magainin I as the recognition element. Glucose oxidase (GOx) acts as a catalytic label tracer to produce the signaling molecule H_2O_2 in the microwell plates. The enzymatically generated H_2O_2 etches the deposited MnO_2 on the photoelectrode and thus enhances the photocurrent. This detection scheme does not cause any damage to biomolecules. It also avoids the adverse effects of immobilized biomolecules for retarding signal production and leads to improved detection when compared to conventional PEC configurations. E. coli can be detected in the 10 to 5.0 × 10^6 CFU·mL^−1 concentration range, and the limit of detection is 3 CFU·mL^−1. Graphical abstract Schematic representation of the photoelectrochemical assay of E. coli through the deposition and dissolution of electron accepting manganese dioxide (MnO_2) on the surface of the photoelectrode.
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High-throughput photoelectrochemical determination of E. coli O157:H7 by modulation of the anodic Photoelectrochemistry of CdS quantum dots via reversible deposition of MnO2.
Mikrochimica acta, 2019Co-Authors: Gaoxia Yang, Yu Ming Dong, Hong Wang, Guang-li WangAbstract:A method is described for modulating the anodic Photoelectrochemistry of netlike CdS quantum dots through the deposition and dissolution of the electron acceptor manganese dioxide (MnO2) on the surface of the photoelectrode. Specifically, the photocurrent of a CdS-modified indium tin oxide (ITO/CdS) electrode is inhibited by chemical deposition of MnO2. However, the photocurrent becomes recovered by oxidative removal of MnO2 with H2O2. This deposition-dissolution reaction modulates the Photoelectrochemistry of CdS effectively. A bioassay for Escherichia coli (E. coli) O157:H7 is designed that uses the antimicrobial peptide magainin I as the recognition element. Glucose oxidase (GOx) acts as a catalytic label tracer to produce the signaling molecule H2O2 in the microwell plates. The enzymatically generated H2O2 etches the deposited MnO2 on the photoelectrode and thus enhances the photocurrent. This detection scheme does not cause any damage to biomolecules. It also avoids the adverse effects of immobilized biomolecules for retarding signal production and leads to improved detection when compared to conventional PEC configurations. E. coli can be detected in the 10 to 5.0 × 106 CFU·mL−1 concentration range, and the limit of detection is 3 CFU·mL−1.
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Graphene oxide based photocathode for split photoelectrochemical bioanalysis
Electrochemistry Communications, 2018Co-Authors: Fang Li, Jun Xian Shu, Tian Tian Gu, Xiu Ming Wu, Yu Ming Dong, Guang-li WangAbstract:In contrast to the many studies employing heavy-metal-containing semiconductors in state-of-the-art Photoelectrochemistry, this work presents the first use of graphene oxide (GO) for advanced cathodic PEC analysis. The bioinspired redox reaction between GO and dopamine (DA) led to the formation of reduced GO (RGO) and the simultaneous deposition of the electron acceptor poly(dopamine) on RGO. This greatly stimulated the cathodic photocurrent of the GO-modified indium tin oxide (ITO) (ITO/GO) electrode, making it possible to detect DA rapidly and sensitively through a split Photoelectrochemistry strategy (i.e. the reaction between the analyte and the photoelectrode and the recording of the photocurrent signal are conducted in separate devices). This study indicates the great promise of GO by demonstrating an elegant sensing strategy involving an in situ redox reaction followed by PEC analysis. It is hoped that this may open up the exploration of carbon nanomaterials for innovative cathodic Photoelectrochemistry in the future.
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Graphene oxide based photocathode for split photoelectrochemical bioanalysis
Elsevier, 2018Co-Authors: Jun Xian Shu, Yu Ming Dong, Guang-li WangAbstract:In contrast to the many studies employing heavy-metal-containing semiconductors in state-of-the-art Photoelectrochemistry, this work presents the first use of graphene oxide (GO) for advanced cathodic PEC analysis. The bioinspired redox reaction between GO and dopamine (DA) led to the formation of reduced GO (RGO) and the simultaneous deposition of the electron acceptor poly(dopamine) on RGO. This greatly stimulated the cathodic photocurrent of the GO-modified indium tin oxide (ITO) (ITO/GO) electrode, making it possible to detect DA rapidly and sensitively through a split Photoelectrochemistry strategy (i.e. the reaction between the analyte and the photoelectrode and the recording of the photocurrent signal are conducted in separate devices). This study indicates the great promise of GO by demonstrating an elegant sensing strategy involving an in situ redox reaction followed by PEC analysis. It is hoped that this may open up the exploration of carbon nanomaterials for innovative cathodic Photoelectrochemistry in the future. Keywords: Graphene oxide, Cathodic Photoelectrochemistry, In situ redox reactio
Thomas W Hamann - One of the best experts on this subject based on the ideXlab platform.
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splitting water with rust hematite Photoelectrochemistry
Dalton Transactions, 2012Co-Authors: Thomas W HamannAbstract:This article focuses on the promise, problems and progress of utilizing hematite for photocatalyzed water oxidation. Issues which require further research are also presented.
Krishnan Rajeshwar - One of the best experts on this subject based on the ideXlab platform.
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Fundamentals of semiconductor electrochemistry and Photoelectrochemistry
Encyclopedia of electrochemistry, 2001Co-Authors: Krishnan RajeshwarAbstract:The sections in this article are Introduction and Scope Electron Energy Levels in Semiconductors and Energy Band Model The Semiconductor–Electrolyte Interface at Equilibrium The Equilibration Process The Depletion Layer Mapping of the Semiconductor Band-edge Positions Relative to Solution Redox Levels Surface States and Other Complications Charge Transfer Processes in the Dark Current-potential Behavior Dark Processes Mediated by Surface States or by Space Charge Layer Recombination Rate-limiting Steps in Charge Transfer Processes in the Dark Light Absorption by the Semiconductor Electrode and Carrier Collection Light Absorption and Carrier Generation Carrier Collection Photocurrent-potential Behavior Dynamics of Photoinduced Charge Transfer Hot Carrier Transfer Multielectron Photoprocesses Nanocrystalline Semiconductor Films and Size Quantization Introductory Remarks The Nanocrystalline Film–Electrolyte Interface and Charge Storage Behavior in the Dark Photoexcitation and Carrier Collection: Steady State Behavior Photoexcitation and Carrier Collection: Dynamic Behavior Size Quantization Chemically Modified Semiconductor–Electrolyte Interfaces Single Crystals Nanocrystalline Semiconductor Films and Composites Types of Photoelectrochemical Devices Conclusion Acknowledgments
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Photoelectrochemistry and the environment
Journal of Applied Electrochemistry, 1995Co-Authors: Krishnan RajeshwarAbstract:This article builds upon a companion review on electrochemical techniques [1] and discusses photocatalytic methods for the treatment and analysis of pollutants in water and air. Organic, inorganic and microbiological pollutants are considered. Areas wherein further research and development are needed are identified. Finally, perspectives on commercialization of this technology are presented.