The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Hideki Minoura - One of the best experts on this subject based on the ideXlab platform.
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cathodic electrodeposition of zno Eosin y hybrid thin films from oxygen saturated aqueous solution of zncl2 and Eosin y
Journal of The Electrochemical Society, 2003Co-Authors: Tsukasa Yoshida, Thierry Pauporte, Daniel Lincot, Torsten Oekermann, Hideki MinouraAbstract:Electrodeposition of ZnO/Eosin Y hybrid thin films from aqueous mixed solution of zinc chloride and Eosin Y as promoted by reduction of oxygen has been studied. Highly oriented crystalline hybrid thin films with two distinctive structures have been obtained depending on the redox state of Eosin Y. Deposition at potentials more positive than that of Eosin Y reduction resulted in a formation of compact ZnO crystals into which Eosin Y molecules are entrapped, while that accompanied with the reduction of Eosin Y yielded a film consisting of sponge-like ZnO crystals with internal nanoporous structure to which Eosin Y molecules are adsorbed. The addition of Eosin Y accelerated the film growth both in oxidized and reduced forms due to its catalysis toward the reduction of oxygen. Photoelectrochemical measurement in an I - /I 3 redox electrolyte solution resealed that the hybrid thin film in the latter structure performed as an efficient sensitized photoelectrode because of its porous nature.
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Cathodic Electrodeposition of ZnO/Eosin Y Hybrid Thin Films from Oxygen-Saturated Aqueous Solution of ZnCl2 and Eosin Y
Journal of The Electrochemical Society, 2003Co-Authors: Tsukasa Yoshida, Thierry Pauporte, Daniel Lincot, Torsten Oekermann, Hideki MinouraAbstract:Electrodeposition of ZnO/Eosin Y hybrid thin films from aqueous mixed solution of zinc chloride and Eosin Y as promoted by reduction of oxygen has been studied. Highly oriented crystalline hybrid thin films with two distinctive structures have been obtained depending on the redox state of Eosin Y. Deposition at potentials more positive than that of Eosin Y reduction resulted in a formation of compact ZnO crystals into which Eosin Y molecules are entrapped, while that accompanied with the reduction of Eosin Y yielded a film consisting of sponge-like ZnO crystals with internal nanoporous structure to which Eosin Y molecules are adsorbed. The addition of Eosin Y accelerated the film growth both in oxidized and reduced forms due to its catalysis toward the reduction of oxygen. Photoelectrochemical measurement in an I - /I 3 redox electrolyte solution resealed that the hybrid thin film in the latter structure performed as an efficient sensitized photoelectrode because of its porous nature.
Tsukasa Yoshida - One of the best experts on this subject based on the ideXlab platform.
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Influence of the supporting salt concentration on the electrodeposition of ZnO/Eosin Y hybrid films
physica status solidi (a), 2008Co-Authors: Cathrin Boeckler, Torsten Oekermann, M. Saruban, Keigo Ichinose, Tsukasa YoshidaAbstract:ZnO/Eosin Y hybrid films were electrodeposited from O 2 -saturated ZnCl 2 -solution under variation of the concentration of the supporting salt KCl. The supporting salt concentration was found to have a significant influence on the amount of dye loading and the morphology of the ZnO/Eosin Y films. By decreasing the supporting salt concentration to 0.01 M KCl, porous films with a high dye loading can be obtained at potentials of -0.8 V vs. SCE at low Eosin Y concentrations in the electrodeposition bath, which usually only lead to porous films at potentials where Eosin Y is reduced (< -0.9 V vs. SCE). ZnO/Eosin Y hybrid films deposited at -0.8 V vs. SCE with KCl concentrations of a) 0.1 M, b) 0.05 M and c) 0.01 M. The photo illustrates the increasing dye loading with decreased supporting salt concentration.
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cathodic electrodeposition of zno Eosin y hybrid thin films from oxygen saturated aqueous solution of zncl2 and Eosin y
Journal of The Electrochemical Society, 2003Co-Authors: Tsukasa Yoshida, Thierry Pauporte, Daniel Lincot, Torsten Oekermann, Hideki MinouraAbstract:Electrodeposition of ZnO/Eosin Y hybrid thin films from aqueous mixed solution of zinc chloride and Eosin Y as promoted by reduction of oxygen has been studied. Highly oriented crystalline hybrid thin films with two distinctive structures have been obtained depending on the redox state of Eosin Y. Deposition at potentials more positive than that of Eosin Y reduction resulted in a formation of compact ZnO crystals into which Eosin Y molecules are entrapped, while that accompanied with the reduction of Eosin Y yielded a film consisting of sponge-like ZnO crystals with internal nanoporous structure to which Eosin Y molecules are adsorbed. The addition of Eosin Y accelerated the film growth both in oxidized and reduced forms due to its catalysis toward the reduction of oxygen. Photoelectrochemical measurement in an I - /I 3 redox electrolyte solution resealed that the hybrid thin film in the latter structure performed as an efficient sensitized photoelectrode because of its porous nature.
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Cathodic Electrodeposition of ZnO/Eosin Y Hybrid Thin Films from Oxygen-Saturated Aqueous Solution of ZnCl2 and Eosin Y
Journal of The Electrochemical Society, 2003Co-Authors: Tsukasa Yoshida, Thierry Pauporte, Daniel Lincot, Torsten Oekermann, Hideki MinouraAbstract:Electrodeposition of ZnO/Eosin Y hybrid thin films from aqueous mixed solution of zinc chloride and Eosin Y as promoted by reduction of oxygen has been studied. Highly oriented crystalline hybrid thin films with two distinctive structures have been obtained depending on the redox state of Eosin Y. Deposition at potentials more positive than that of Eosin Y reduction resulted in a formation of compact ZnO crystals into which Eosin Y molecules are entrapped, while that accompanied with the reduction of Eosin Y yielded a film consisting of sponge-like ZnO crystals with internal nanoporous structure to which Eosin Y molecules are adsorbed. The addition of Eosin Y accelerated the film growth both in oxidized and reduced forms due to its catalysis toward the reduction of oxygen. Photoelectrochemical measurement in an I - /I 3 redox electrolyte solution resealed that the hybrid thin film in the latter structure performed as an efficient sensitized photoelectrode because of its porous nature.
Lixia Sang - One of the best experts on this subject based on the ideXlab platform.
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TiO2 nanotube arrays decorated with plasmonic Cu, CuO nanoparticles, and Eosin Y dye as efficient photoanode for water splitting
Materials Chemistry and Physics, 2019Co-Authors: Lixia Sang, Shan Zhang, Jing Zhang, Guangmei BaiAbstract:Abstract Photoelectrochemical (PEC) splitting of water over a semiconductor is an ideal and clean way to produce hydrogen by using solar energy. Herein, a photoanode of TiO2 nanotube arrays (TNTA) was decorated with environment-friendly Cu-based nanomaterials through a two-step electrochemical process, followed by sensitization with Eosin Y dye, for PEC water splitting. The confirmations of Cu and CuO on the surface of TNTA were recorded by XRD combined with XPS techniques. The obtained Cu-CuO/TNTA and Eosin Y/Cu-CuO/TNTA electrodes exhibit good light absorption abilities in the range of 380–600 nm, and the adsorption of Eosin Y is enhanced. Based on the analysis of the charge transfer resistance and energy levels of Cu, CuO, TiO2, and Eosin Y, it can be found that the deposition of Cu-CuO and Eosin Y on TNTA can greatly accelerate the interface charge transfer, resulting in enhanced PEC performances. Moreover, the plasmonic Cu and Eosin Y can help to harvest more visible light and further improve the photocurrent density.
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Co-sensitization of TiO2 electrode with Eosin Y dye and carbon dots for photoelectrochemical water splitting: The enhanced dye adsorption and the charge transfer route
International Journal of Hydrogen Energy, 2017Co-Authors: Lixia Sang, Lei Lei, Jia LinAbstract:Abstract According to a stepwise adsorption approach, TiO2 NT photoanode was co-sensitized with Eosin Y and carbon dots for photoelectrochemical water splitting. The adsorption amount of Eosin Y in co-sensitized samples increases due to the presence of carbon dots regardless of co-sensitization sequence. The absorbance of Eosin Y/carbon dots/TiO2 NT in visible light region is stronger than that of carbon dots/Eosin Y/TiO2 NT, while carbon dots/Eosin Y/TiO2 NT exhibits higher photocurrent density and hydrogen production rate. Based on the shortest electron transport time, the electron diffusion coefficient in carbon dots/Eosin Y/TiO2 NT electrode is up to 14.94 × 10−19cm2s−1. A favorable energy levels alignment dominates in carbon dots/Eosin Y/TiO2 NT, which can further account for enhancement in charge transfer.
Shaoqin Peng - One of the best experts on this subject based on the ideXlab platform.
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Formation of multilayer-Eosin Y-sensitized TiO2 via Fe3+ coupling for efficient visible-light photocatalytic hydrogen evolution
International Journal of Hydrogen Energy, 2009Co-Authors: Miaomiao Guo, Shaoqin PengAbstract:Abstract An efficient visible-light active photocatalyst of multilayer-Eosin Y-sensitized TiO2 is prepared through linkage of Fe3+ between not only TiO2 and Eosin Y but also different Eosin Y molecules to form three-dimensional polymeric dye structure. The multilayer-dye-sensitized photocatalyst is found to have high light harvesting efficiency and photocatalytic activity for hydrogen evolution under visible light irradiation (λ > 420 nm). On the optimum conditions (1:1 initial molar ratio of Eosin Y to Fe(NO3)3, initial 10 × 10−3 M Eosin Y, and 1.0 wt% Pt deposited by in situ photoreduction), its maximal apparent quantum yield for hydrogen evolution is 19.1% from aqueous triethanolamine solution (TEOA aq). The present study highlights linking between dye molecules via metal ions as a general way to develop efficient visible-light photocatalyst.
Torsten Oekermann - One of the best experts on this subject based on the ideXlab platform.
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Influence of the supporting salt concentration on the electrodeposition of ZnO/Eosin Y hybrid films
physica status solidi (a), 2008Co-Authors: Cathrin Boeckler, Torsten Oekermann, M. Saruban, Keigo Ichinose, Tsukasa YoshidaAbstract:ZnO/Eosin Y hybrid films were electrodeposited from O 2 -saturated ZnCl 2 -solution under variation of the concentration of the supporting salt KCl. The supporting salt concentration was found to have a significant influence on the amount of dye loading and the morphology of the ZnO/Eosin Y films. By decreasing the supporting salt concentration to 0.01 M KCl, porous films with a high dye loading can be obtained at potentials of -0.8 V vs. SCE at low Eosin Y concentrations in the electrodeposition bath, which usually only lead to porous films at potentials where Eosin Y is reduced (< -0.9 V vs. SCE). ZnO/Eosin Y hybrid films deposited at -0.8 V vs. SCE with KCl concentrations of a) 0.1 M, b) 0.05 M and c) 0.01 M. The photo illustrates the increasing dye loading with decreased supporting salt concentration.
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cathodic electrodeposition of zno Eosin y hybrid thin films from oxygen saturated aqueous solution of zncl2 and Eosin y
Journal of The Electrochemical Society, 2003Co-Authors: Tsukasa Yoshida, Thierry Pauporte, Daniel Lincot, Torsten Oekermann, Hideki MinouraAbstract:Electrodeposition of ZnO/Eosin Y hybrid thin films from aqueous mixed solution of zinc chloride and Eosin Y as promoted by reduction of oxygen has been studied. Highly oriented crystalline hybrid thin films with two distinctive structures have been obtained depending on the redox state of Eosin Y. Deposition at potentials more positive than that of Eosin Y reduction resulted in a formation of compact ZnO crystals into which Eosin Y molecules are entrapped, while that accompanied with the reduction of Eosin Y yielded a film consisting of sponge-like ZnO crystals with internal nanoporous structure to which Eosin Y molecules are adsorbed. The addition of Eosin Y accelerated the film growth both in oxidized and reduced forms due to its catalysis toward the reduction of oxygen. Photoelectrochemical measurement in an I - /I 3 redox electrolyte solution resealed that the hybrid thin film in the latter structure performed as an efficient sensitized photoelectrode because of its porous nature.
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Cathodic Electrodeposition of ZnO/Eosin Y Hybrid Thin Films from Oxygen-Saturated Aqueous Solution of ZnCl2 and Eosin Y
Journal of The Electrochemical Society, 2003Co-Authors: Tsukasa Yoshida, Thierry Pauporte, Daniel Lincot, Torsten Oekermann, Hideki MinouraAbstract:Electrodeposition of ZnO/Eosin Y hybrid thin films from aqueous mixed solution of zinc chloride and Eosin Y as promoted by reduction of oxygen has been studied. Highly oriented crystalline hybrid thin films with two distinctive structures have been obtained depending on the redox state of Eosin Y. Deposition at potentials more positive than that of Eosin Y reduction resulted in a formation of compact ZnO crystals into which Eosin Y molecules are entrapped, while that accompanied with the reduction of Eosin Y yielded a film consisting of sponge-like ZnO crystals with internal nanoporous structure to which Eosin Y molecules are adsorbed. The addition of Eosin Y accelerated the film growth both in oxidized and reduced forms due to its catalysis toward the reduction of oxygen. Photoelectrochemical measurement in an I - /I 3 redox electrolyte solution resealed that the hybrid thin film in the latter structure performed as an efficient sensitized photoelectrode because of its porous nature.