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Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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Preparation of CdSe/NH2-MIL-101(Cr) Nanocomposites with Improved Photocatalytic Hydrogen Production Performance
Catalysis Letters, 2021Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Jiayu Bai, Lei WangAbstract:In this paper, novel CdSe/NH2-MIL-101(Cr) nanocomposites for Photocatalytic Hydrogen Production were synthesized. When the prepared NH2-MIL-101(Cr) MOFs were modified with CdSe QDs, the Photocatalytic Hydrogen Production amount was significantly increased and reached to 17,664 μmol g−1 in 7 h. The formation of CdSe/NH2-MIL-101(Cr) nanocomposites enhanced the light absorption intensity, broadened the visible light absorption range, promoted the transfer of photogenerated electrons and inhibited the recombination of photogenerated electron–hole pairs, then effectively improved the Photocatalytic Hydrogen Production performance. In addition, the CdSe/NH2-MIL-101(Cr) nanocomposites exhibited high cycle stability, which was beneficial to the practical application in Photocatalytic Hydrogen Production.
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Construction of ternary Cd_xMo_1−xSe quantum dots for enhanced Photocatalytic Hydrogen Production
Journal of Materials Science, 2020Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Lei WangAbstract:The development of novel photocatalyst is an important issue for improving the Photocatalytic Hydrogen Production efficiency. Herein, novel aqueous ternary Cd_ x Mo_1− x Se quantum dots (QDs) are prepared with five ratios ( x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd_0.75Mo_0.25Se QDs, Cd_0.5Mo_0.5Se QDs and MoSe_2 QDs, Cd_0.67Mo_0.33Se QDs exhibit significantly enhanced Photocatalytic activity, and the amount of H_2 Production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd_0.67Mo_0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the Photocatalytic Hydrogen Production application.
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ZnIn2S4 decorated Co-doped NH2-MIL-53(Fe) nanocomposites for efficient Photocatalytic Hydrogen Production
Applied Surface Science, 2020Co-Authors: Fangxu Dai, Jishu Han, Ruiyang Zhao, Ying Wang, Xinran Zhou, Lei WangAbstract:Abstract An efficient visible light responsive ZnIn2S4@NH2-MIL-53(Fe/Co0.75) nanocomposite was prepared for Photocatalytic Hydrogen Production application. Under visible light irradiation, the ZnIn2S4@NH2-MIL-53(Fe/Co0.75) photocatalyst displayed improved Photocatalytic performance and the Hydrogen Production rate reached to 161724.8 μmol/g in 6 h. The nanocomposite with large specific surface area and mesoporous structure increased the light absorption, improved the electrons transfer and suppressed the recombination of photogenerated electron-hole pairs, thus exhibiting efficient Photocatalytic Hydrogen Production performance. The controllable synthesis of ZnIn2S4@NH2-MIL-53(Fe/Co0.75) nanocomposite as a high-efficiency photocatalyst would have broad prospect for water splitting Hydrogen Production application.
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Construction of ternary CdxMo1−xSe quantum dots for enhanced Photocatalytic Hydrogen Production
Journal of Materials Science, 2019Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Lei WangAbstract:The development of novel photocatalyst is an important issue for improving the Photocatalytic Hydrogen Production efficiency. Herein, novel aqueous ternary CdxMo1−xSe quantum dots (QDs) are prepared with five ratios (x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd0.75Mo0.25Se QDs, Cd0.5Mo0.5Se QDs and MoSe2 QDs, Cd0.67Mo0.33Se QDs exhibit significantly enhanced Photocatalytic activity, and the amount of H2 Production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd0.67Mo0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the Photocatalytic Hydrogen Production application.
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Synthesis of CdSe/SrTiO3 nanocomposites with enhanced Photocatalytic Hydrogen Production activity
Applied Surface Science, 2018Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Lei Wang, Fangxu Dai, Shouhua FengAbstract:Abstract The Photocatalytic Hydrogen Production has become one of the most promising strategies to solve the energy crisis and environmental pollution. Novel CdSe/SrTiO3 nanocomposites (average diameter ≈ 114.6 nm) with high Photocatalytic activity are synthesized and used for visible light Photocatalytic water splitting for Hydrogen Production. Through optimizing the concentration of CdSe QDs, CdSe/SrTiO3 nanocomposites exhibit increased visible light absorption and enhanced Photocatalytic Hydrogen evolution efficiency compared to SrTiO3 nanoparticles. The maximum H2 evolution amount reaches to 3350.53 μmol in 8 h by using CdSe/SrTiO3-3 as catalyst. Owing to the formation of heterojunction at the interface between CdSe and SrTiO3, the electrochemical impedance spectrum of CdSe/SrTiO3-3 exhibits the smallest arc radius and the photocurrent density of CdSe/SrTiO3-3 reaches to 0.26 μA cm−2. The photogenerated electrons are effectively separated and transferred and the recombination of electron-hole pairs is avoided, thus significantly improving the Photocatalytic Hydrogen Production performance of CdSe/SrTiO3 nanocomposites.
Jishu Han - One of the best experts on this subject based on the ideXlab platform.
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Preparation of CdSe/NH2-MIL-101(Cr) Nanocomposites with Improved Photocatalytic Hydrogen Production Performance
Catalysis Letters, 2021Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Jiayu Bai, Lei WangAbstract:In this paper, novel CdSe/NH2-MIL-101(Cr) nanocomposites for Photocatalytic Hydrogen Production were synthesized. When the prepared NH2-MIL-101(Cr) MOFs were modified with CdSe QDs, the Photocatalytic Hydrogen Production amount was significantly increased and reached to 17,664 μmol g−1 in 7 h. The formation of CdSe/NH2-MIL-101(Cr) nanocomposites enhanced the light absorption intensity, broadened the visible light absorption range, promoted the transfer of photogenerated electrons and inhibited the recombination of photogenerated electron–hole pairs, then effectively improved the Photocatalytic Hydrogen Production performance. In addition, the CdSe/NH2-MIL-101(Cr) nanocomposites exhibited high cycle stability, which was beneficial to the practical application in Photocatalytic Hydrogen Production.
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Construction of ternary Cd_xMo_1−xSe quantum dots for enhanced Photocatalytic Hydrogen Production
Journal of Materials Science, 2020Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Lei WangAbstract:The development of novel photocatalyst is an important issue for improving the Photocatalytic Hydrogen Production efficiency. Herein, novel aqueous ternary Cd_ x Mo_1− x Se quantum dots (QDs) are prepared with five ratios ( x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd_0.75Mo_0.25Se QDs, Cd_0.5Mo_0.5Se QDs and MoSe_2 QDs, Cd_0.67Mo_0.33Se QDs exhibit significantly enhanced Photocatalytic activity, and the amount of H_2 Production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd_0.67Mo_0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the Photocatalytic Hydrogen Production application.
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ZnIn2S4 decorated Co-doped NH2-MIL-53(Fe) nanocomposites for efficient Photocatalytic Hydrogen Production
Applied Surface Science, 2020Co-Authors: Fangxu Dai, Jishu Han, Ruiyang Zhao, Ying Wang, Xinran Zhou, Lei WangAbstract:Abstract An efficient visible light responsive ZnIn2S4@NH2-MIL-53(Fe/Co0.75) nanocomposite was prepared for Photocatalytic Hydrogen Production application. Under visible light irradiation, the ZnIn2S4@NH2-MIL-53(Fe/Co0.75) photocatalyst displayed improved Photocatalytic performance and the Hydrogen Production rate reached to 161724.8 μmol/g in 6 h. The nanocomposite with large specific surface area and mesoporous structure increased the light absorption, improved the electrons transfer and suppressed the recombination of photogenerated electron-hole pairs, thus exhibiting efficient Photocatalytic Hydrogen Production performance. The controllable synthesis of ZnIn2S4@NH2-MIL-53(Fe/Co0.75) nanocomposite as a high-efficiency photocatalyst would have broad prospect for water splitting Hydrogen Production application.
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Construction of ternary CdxMo1−xSe quantum dots for enhanced Photocatalytic Hydrogen Production
Journal of Materials Science, 2019Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Lei WangAbstract:The development of novel photocatalyst is an important issue for improving the Photocatalytic Hydrogen Production efficiency. Herein, novel aqueous ternary CdxMo1−xSe quantum dots (QDs) are prepared with five ratios (x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd0.75Mo0.25Se QDs, Cd0.5Mo0.5Se QDs and MoSe2 QDs, Cd0.67Mo0.33Se QDs exhibit significantly enhanced Photocatalytic activity, and the amount of H2 Production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd0.67Mo0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the Photocatalytic Hydrogen Production application.
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Synthesis of CdSe/SrTiO3 nanocomposites with enhanced Photocatalytic Hydrogen Production activity
Applied Surface Science, 2018Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Lei Wang, Fangxu Dai, Shouhua FengAbstract:Abstract The Photocatalytic Hydrogen Production has become one of the most promising strategies to solve the energy crisis and environmental pollution. Novel CdSe/SrTiO3 nanocomposites (average diameter ≈ 114.6 nm) with high Photocatalytic activity are synthesized and used for visible light Photocatalytic water splitting for Hydrogen Production. Through optimizing the concentration of CdSe QDs, CdSe/SrTiO3 nanocomposites exhibit increased visible light absorption and enhanced Photocatalytic Hydrogen evolution efficiency compared to SrTiO3 nanoparticles. The maximum H2 evolution amount reaches to 3350.53 μmol in 8 h by using CdSe/SrTiO3-3 as catalyst. Owing to the formation of heterojunction at the interface between CdSe and SrTiO3, the electrochemical impedance spectrum of CdSe/SrTiO3-3 exhibits the smallest arc radius and the photocurrent density of CdSe/SrTiO3-3 reaches to 0.26 μA cm−2. The photogenerated electrons are effectively separated and transferred and the recombination of electron-hole pairs is avoided, thus significantly improving the Photocatalytic Hydrogen Production performance of CdSe/SrTiO3 nanocomposites.
Ruiyang Zhao - One of the best experts on this subject based on the ideXlab platform.
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Preparation of CdSe/NH2-MIL-101(Cr) Nanocomposites with Improved Photocatalytic Hydrogen Production Performance
Catalysis Letters, 2021Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Jiayu Bai, Lei WangAbstract:In this paper, novel CdSe/NH2-MIL-101(Cr) nanocomposites for Photocatalytic Hydrogen Production were synthesized. When the prepared NH2-MIL-101(Cr) MOFs were modified with CdSe QDs, the Photocatalytic Hydrogen Production amount was significantly increased and reached to 17,664 μmol g−1 in 7 h. The formation of CdSe/NH2-MIL-101(Cr) nanocomposites enhanced the light absorption intensity, broadened the visible light absorption range, promoted the transfer of photogenerated electrons and inhibited the recombination of photogenerated electron–hole pairs, then effectively improved the Photocatalytic Hydrogen Production performance. In addition, the CdSe/NH2-MIL-101(Cr) nanocomposites exhibited high cycle stability, which was beneficial to the practical application in Photocatalytic Hydrogen Production.
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Construction of ternary Cd_xMo_1−xSe quantum dots for enhanced Photocatalytic Hydrogen Production
Journal of Materials Science, 2020Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Lei WangAbstract:The development of novel photocatalyst is an important issue for improving the Photocatalytic Hydrogen Production efficiency. Herein, novel aqueous ternary Cd_ x Mo_1− x Se quantum dots (QDs) are prepared with five ratios ( x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd_0.75Mo_0.25Se QDs, Cd_0.5Mo_0.5Se QDs and MoSe_2 QDs, Cd_0.67Mo_0.33Se QDs exhibit significantly enhanced Photocatalytic activity, and the amount of H_2 Production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd_0.67Mo_0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the Photocatalytic Hydrogen Production application.
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ZnIn2S4 decorated Co-doped NH2-MIL-53(Fe) nanocomposites for efficient Photocatalytic Hydrogen Production
Applied Surface Science, 2020Co-Authors: Fangxu Dai, Jishu Han, Ruiyang Zhao, Ying Wang, Xinran Zhou, Lei WangAbstract:Abstract An efficient visible light responsive ZnIn2S4@NH2-MIL-53(Fe/Co0.75) nanocomposite was prepared for Photocatalytic Hydrogen Production application. Under visible light irradiation, the ZnIn2S4@NH2-MIL-53(Fe/Co0.75) photocatalyst displayed improved Photocatalytic performance and the Hydrogen Production rate reached to 161724.8 μmol/g in 6 h. The nanocomposite with large specific surface area and mesoporous structure increased the light absorption, improved the electrons transfer and suppressed the recombination of photogenerated electron-hole pairs, thus exhibiting efficient Photocatalytic Hydrogen Production performance. The controllable synthesis of ZnIn2S4@NH2-MIL-53(Fe/Co0.75) nanocomposite as a high-efficiency photocatalyst would have broad prospect for water splitting Hydrogen Production application.
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Construction of ternary CdxMo1−xSe quantum dots for enhanced Photocatalytic Hydrogen Production
Journal of Materials Science, 2019Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Ying Wang, Lei WangAbstract:The development of novel photocatalyst is an important issue for improving the Photocatalytic Hydrogen Production efficiency. Herein, novel aqueous ternary CdxMo1−xSe quantum dots (QDs) are prepared with five ratios (x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd0.75Mo0.25Se QDs, Cd0.5Mo0.5Se QDs and MoSe2 QDs, Cd0.67Mo0.33Se QDs exhibit significantly enhanced Photocatalytic activity, and the amount of H2 Production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd0.67Mo0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the Photocatalytic Hydrogen Production application.
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Synthesis of CdSe/SrTiO3 nanocomposites with enhanced Photocatalytic Hydrogen Production activity
Applied Surface Science, 2018Co-Authors: Jishu Han, Ruiyang Zhao, Ying Liu, Lei Wang, Fangxu Dai, Shouhua FengAbstract:Abstract The Photocatalytic Hydrogen Production has become one of the most promising strategies to solve the energy crisis and environmental pollution. Novel CdSe/SrTiO3 nanocomposites (average diameter ≈ 114.6 nm) with high Photocatalytic activity are synthesized and used for visible light Photocatalytic water splitting for Hydrogen Production. Through optimizing the concentration of CdSe QDs, CdSe/SrTiO3 nanocomposites exhibit increased visible light absorption and enhanced Photocatalytic Hydrogen evolution efficiency compared to SrTiO3 nanoparticles. The maximum H2 evolution amount reaches to 3350.53 μmol in 8 h by using CdSe/SrTiO3-3 as catalyst. Owing to the formation of heterojunction at the interface between CdSe and SrTiO3, the electrochemical impedance spectrum of CdSe/SrTiO3-3 exhibits the smallest arc radius and the photocurrent density of CdSe/SrTiO3-3 reaches to 0.26 μA cm−2. The photogenerated electrons are effectively separated and transferred and the recombination of electron-hole pairs is avoided, thus significantly improving the Photocatalytic Hydrogen Production performance of CdSe/SrTiO3 nanocomposites.
Chang Feng - One of the best experts on this subject based on the ideXlab platform.
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Synergistic effect of hierarchical structure and Z-scheme heterojunction constructed by CdS nanoparticles and nanoflower-structured Co9S8 with significantly enhanced Photocatalytic Hydrogen Production performance
Journal of Photochemistry and Photobiology A: Chemistry, 2021Co-Authors: Chang Feng, Zhuoyuan Chen, Jiangping Jing, Mengmeng Sun, Jing Han, Ke FangAbstract:Abstract Hierarchical structure can significantly increase the reactive sites and provide advantages for heterojunction engineering in the field of photocatalysis. However, it is still a great challenge to realize efficient Photocatalytic Hydrogen Production by controlling the band structure and constructing Z-scheme heterojunction system based on the hierarchical photocatalyst. In this paper, a CdS/Co9S8 Z-scheme heterojunction system was prepared by depositing CdS nanoparticles on nanoflower-structured Co9S8 hierarchical photocatalyst, which showed enhanced Photocatalytic Hydrogen Production performance. The Photocatalytic Hydrogen Production rate of the CdS/Co9S8 Z-scheme heterojunction system is 11.60 mmol g−1 h−1, which is 13.6 and 55.2 times that of CdS and Co9S8, respectively. The synergistic effect of the hierarchical structure and the Z-scheme heterojunction makes the photogenerated charge carriers quickly and efficiently transfer to the surface of the photocatalyst, which accelerates the Photocatalytic Hydrogen Production process.
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In-situ synthesis of CdS quantum dots on CdCO3 cubic structure for enhanced Photocatalytic Hydrogen Production performance
Materials Letters, 2019Co-Authors: Jing Han, Chang Feng, Zhuoyuan Chen, Qingyue Xiang, Yu Qiao, Xiaoyan DengAbstract:Abstract The CdCO3 cubic structure was firstly synthesized by hydrothermal method. Then CdS quantum dots (QDs) were in-situ deposited on the CdCO3 to form CdCO3/CdS QDs composite photocatalyst to explore its Photocatalytic Hydrogen Production performance. Physical characterization results show that cubic CdCO3 consists of nanoflake structures, and CdS QDs are uniformly dispersed on the surface of CdCO3 nanoflakes to form heterostructures. Under visible light irradiation, CdCO3/CdS QDs photocatalyst exhibits excellent Photocatalytic performance with the Photocatalytic H2 Production rate of 1.93 mmol·h−1·g−1. The cubic CdCO3 can provide a large number of activity sites for CdS QDs, which is conducive to the Photocatalytic Hydrogen Production process.
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effectively enhanced Photocatalytic Hydrogen Production performance of one pot synthesized mos2 clusters cds nanorod heterojunction material under visible light
Chemical Engineering Journal, 2018Co-Authors: Chang Feng, Zhuoyuan Chen, Jian Hou, Mingxian Sun, Rongchang ZengAbstract:Abstract In the present work, the MoS2 clusters/CdS (CMo/CdS) nanorod (NR) heterojunction photocatalysts were prepared through a simple one-pot solvothermal method under lower temperature. The cluster-structured MoS2 is uniformly dispersed on the surface of CdS NRs, and the MoS2 modification does not change the crystal structure and morphology of CdS NRs. The modification of MoS2 can significantly enhance the Photocatalytic Hydrogen Production performance of CdS NRs. When the molar ratio of MoS2 to CdS NRs is 3%, the CMo/CdS NRs has the highest Photocatalytic Hydrogen evolution rate, 12.38 mmol·g−1·h−1, which is 17.4 times that of CdS NRs. The enhanced Photocatalytic Hydrogen Production performance can be attributed to the co-catalytic action of MoS2, which can accelerate the Photocatalytic Hydrogen Production process of CdS NRs. Meanwhile, MoS2 can reduce the surface resistance of CdS NRs and improve the transmission of the photogenerated electrons to the surface of CdS NRs, resulting in the significant decrease of the recombination rate of the photogenerated electrons and holes, and thus promoting the Photocatalytic Hydrogen Production performance of CdS NRs.
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Effectively enhanced Photocatalytic Hydrogen Production performance of one-pot synthesized MoS2 clusters/CdS nanorod heterojunction material under visible light
Chemical Engineering Journal, 2018Co-Authors: Chang Feng, Zhuoyuan Chen, Jian Hou, Mingxian Sun, Rongchang ZengAbstract:Abstract In the present work, the MoS2 clusters/CdS (CMo/CdS) nanorod (NR) heterojunction photocatalysts were prepared through a simple one-pot solvothermal method under lower temperature. The cluster-structured MoS2 is uniformly dispersed on the surface of CdS NRs, and the MoS2 modification does not change the crystal structure and morphology of CdS NRs. The modification of MoS2 can significantly enhance the Photocatalytic Hydrogen Production performance of CdS NRs. When the molar ratio of MoS2 to CdS NRs is 3%, the CMo/CdS NRs has the highest Photocatalytic Hydrogen evolution rate, 12.38 mmol·g−1·h−1, which is 17.4 times that of CdS NRs. The enhanced Photocatalytic Hydrogen Production performance can be attributed to the co-catalytic action of MoS2, which can accelerate the Photocatalytic Hydrogen Production process of CdS NRs. Meanwhile, MoS2 can reduce the surface resistance of CdS NRs and improve the transmission of the photogenerated electrons to the surface of CdS NRs, resulting in the significant decrease of the recombination rate of the photogenerated electrons and holes, and thus promoting the Photocatalytic Hydrogen Production performance of CdS NRs.
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Significantly enhanced Photocatalytic Hydrogen Production performance of g-C3N4/CNTs/CdZnS with carbon nanotubes as the electron mediators
Journal of Materials Science & Technology, 1Co-Authors: Chang Feng, Zhuoyuan Chen, Jiangping Jing, Mengmeng Sun, Jing Tian, Jian HouAbstract:Abstract The electron mediator can effectively improve the performance of the direct Z-scheme heterojunction photocatalysts. However, it is still a great challenge to select cheap and efficient electron mediators and to design them into the Z-scheme Photocatalytic system. In the present paper, the g-C3N4/CNTs/CdZnS Z-scheme photocatalyst was prepared using carbon nanotubes (CNTs) as the electron mediators, and its Photocatalytic Hydrogen Production performance was studied. Compared with single-phase g-C3N4, CdZnS and biphasic g-C3N4/CdZnS photocatalysts, the Photocatalytic Hydrogen Production performance of the prepared g-C3N4/CNTs/CdZnS has been significantly enhanced. Meanwhile, g-C3N4/CNTs/CdZnS possesses very good Photocatalytic Hydrogen Production stability. The enhanced Photocatalytic Hydrogen Production performance of g-C3N4/CNTs/CdZnS is attributed to the fact that CNTs, as an electron mediator, can accelerate the recombination of the photogenerated holes in the valence band of g-C3N4 and the photogenerated electrons in the conduction band of CdZnS, which makes the g-C3N4/CNTs/CdZnS Z-scheme photocatalyst be easier to escape the photogenerated electrons, increases the concentration of the photogenerated carriers and prolongs the lifetime of the photogenerated carriers. This work provides a theoretical basis for the further development and design of CNTs as the intermediate electron mediator of the Z-scheme heterojunction photocatalyst.
Satoshi Kaneco - One of the best experts on this subject based on the ideXlab platform.
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Photocatalytic Hydrogen Production from aqueous methanol solution using titanium dioxide with the aid of simultaneous metal deposition
Energy Sources Part A: Recovery Utilization and Environmental Effects, 2016Co-Authors: P. Gomathisankar, Hideyuki Katsumata, T. Kawamura, Suzuki Toru, Satoshi KanecoAbstract:ABSTRACTThe Photocatalytic Hydrogen generation from aqueous methanol solution using TiO2 photocatalyst was investigated with the aid of simultaneous metal deposition. The Photocatalytic Hydrogen evolution with pure TiO2 was very small. The simultaneous deposition for various metals was therefore evaluated. As a result, the additions of Au and Cu ions were effective for the improvement of Photocatalytic Hydrogen Production. Methanol concentration and metal ion concentration were optimized for the system. The optimal methanol concentrations were 90 and 80 vol% in the case of addition of Au and Cu ions, respectively. Under the optimal conditions, the Photocatalytic Hydrogen Production using TiO2 photocatalyst with the aid of simultaneous Cu and Au deposition were approximately 25 and 120 times larger than those obtained with bare TiO2.
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Enhanced Photocatalytic Hydrogen Production from aqueous methanol solution using ZnO with simultaneous photodeposition of Cu
International Journal of Hydrogen Energy, 2013Co-Authors: P. Gomathisankar, Katsumasa Hachisuka, Hideyuki Katsumata, Tohru Suzuki, Kunihiro Funasaka, Satoshi KanecoAbstract:Abstract The enhanced Photocatalytic Hydrogen Production from aqueous methanol solution using ZnO was investigated with aid of simultaneous metal deposition. The simultaneous deposition for such metals as Ag, Au, Cu, Ni, Pd, Pt, and Rh was evaluated for the H2 Production from aqueous methanol solution. As a result, the addition of Cu ion was effective improvement in Photocatalytic Hydrogen evolution. The Photocatalytic Hydrogen Production using ZnO photocatalyst with aid of simultaneous deposition of Cu was approximately 130 times better than those obtained with bare ZnO. The Cu-deposited ZnO had the response to the visible light for the Hydrogen formation. After the Photocatalytic Hydrogen Production, the in-situ Cu-photodeposited ZnO sample was characterized by X-ray diffraction (XRD), UV–visible diffuse reflectance spectrometry (UV-DRS), and photoluminescence (PL) spectroscopy.
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Photocatalytic Hydrogen Production with CuS/ZnO from aqueous Na2S + Na2SO3 solution
International Journal of Hydrogen Energy, 2013Co-Authors: P. Gomathisankar, Katsumasa Hachisuka, Hideyuki Katsumata, Tohru Suzuki, Kunihiro Funasaka, Satoshi KanecoAbstract:Abstract The Photocatalytic Hydrogen Production in the sacrificial S2−–SO32− anions was investigated with ZnO in the addition of metal sulfides containing Ag2S, CuS, Fe2S3, and NiS. In the absence of metal sulfides, the Photocatalytic H2 evolution using ZnO was observed with 255 μmol g−1. The CuS amount and the concentrations of S2− and SO32− ions were optimized. It was found that ternary component semiconductor CuS/ZnS/ZnO was formed during the Photocatalytic Hydrogen Production in the aqueous Na2S + Na2SO3 solution. The Photocatalytic Hydrogen evolution with CuS/ZnS/ZnO in the 0.4 M Na2S–0.4 M Na2SO3 solution was more than about 8.5 times better compared with those obtained with only ZnO. The CuS clusters on the surface of ZnS/ZnO seem to play an important role on the separation for electron–hole pair and the enhancement of H2 Production. Nano-sized ZnS/ZnO Photocatalytic Hydrogen technology has great potential for low-cost, environmentally friendly solar-Hydrogen Production to support the future Hydrogen economy.
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Photocatalytic Hydrogen Production with aid of simultaneous metal deposition using titanium dioxide from aqueous glucose solution
International Journal of Hydrogen Energy, 2013Co-Authors: P. Gomathisankar, Hideyuki Katsumata, Tohru Suzuki, Daisuke Yamamoto, Satoshi KanecoAbstract:The Photocatalytic Hydrogen Production with aid of simultaneous metal deposition using TiO2 was investigated in biomass glucose solution. Because the Hydrogen Production was very trace with pure TiO2, the simultaneous metal deposition was applied into the glucose solution. The Photocatalytic H2 Production activity with TiO2 was significantly enhanced by simultaneous metal deposition for Au and Pd. The experimental factors such as glucose concentration, metal ion concentration and reaction temperature were investigated. The Photocatalytic Hydrogen Production increased with increasing the concentration of glucose, and it followed Langmuir–Hinshelwood mechanism. Under the optimal conditions, the Photocatalytic Hydrogen generations from aqueous glucose solution with in-situ Au and Pd deposited TiO2 were about 203 and 362 times larger compared with those observed with pure TiO2. The enhanced Photocatalytic activity could be explained in terms of reduced electron hole recombination via electron transfer from conductance band of TiO2 to metal.
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Photocatalytic Hydrogen Production from aqueous methanol solution with CuO/Al2O3/TiO2 nanocomposite
International Journal of Hydrogen Energy, 2010Co-Authors: Takuya Miwa, Hideyuki Katsumata, Tohru Suzuki, Satoshi Kaneco, Kiyohisa Ohta, Suresh Chand Verma, Kunihiro SugiharaAbstract:Abstract The Photocatalytic Hydrogen Production from aqueous methanol solution was investigated with ZnO/TiO2, SnO/TiO2, CuO/TiO2, Al2O3/TiO2 and CuO/Al2O3/TiO2 nanocomposites. A mechanical mixing method, followed by the solid-state reaction at elevated temperature, was used for the preparation of nanocomposite photocatalyst. Among these nanocomposite photocatalysts, the maximal Photocatalytic Hydrogen Production was observed with CuO/Al2O3/TiO2 nanocomposites. A variety of components of CuO/Al2O3/TiO2 photocatalysts were tested for the enhancement of H2 formation. The optimal component was 0.2 wt% CuO/0.3 wt% Al2O3/TiO2. The activity exhibited approximately tenfold enhancement at the optimum loading, compared with that with pure P-25 TiO2. Nano-sized TiO2 Photocatalytic Hydrogen technology has great potential for low-cost, environmentally friendly solar-Hydrogen Production to support the future Hydrogen economy.