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Preparation and Characterization of ZnS-ZnIn2S4 and Its Photocatalytic Performance for Hydrogen Generation in the Presence of Glucose Visible Light Irradiation

Author: WangJianXia
Tutor: LiYueXiang
School: Nanchang University
Course: Inorganic Chemistry
Keywords: ZnS ZnIn2S4 Composite photocatalyst Glucose Hydrogen
CLC: O643.3
Type: Master's thesis
Year: 2010
Downloads: 120
Quote: 1
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Abstract


This article was prepared by two methods compound semiconductor photocatalyst ZnS-ZnIn2S4, and studied the glucose as an electron donor in the photocatalytic hydrogen production performance and photocatalytic degradation of glucose in the reaction mechanism . Can be divided into two parts: one with methanol Solvothermal photocatalyst ZnS-ZnIn2S4. Catalysts using scanning electron microscopy SEM, TEM TEM, EDS EDS, X diffraction XRD, UV - Vis spectroscopy DRS, BET surface area and electrochemical means of characterization. The results showed that the photocatalyst ZnS-ZnIn2S4 hexagonal crystal form , has a complex morphology, such as microspheres , micro rods and microstrip structure . Glucose as the electron donor , was studied on the catalyst Pt/ZnS-ZnIn2S4 Photocatalytic Hydrogen glucose acts . The results show that the system at the same time to increase the degradation of the active hydrogen glucose. Also studied the ZnS (x mol%)-ZnIn2S4 composition, initial glucose concentration and NaOH concentration on hydrogen production activity. ZnS-ZnIn2S4 photocatalytic activity than pure ZnIn2S4 better because ZnIn2S4 ZnS surface of the catalyst to promote the adsorption of glucose . Initial glucose concentration on hydrogen production rate of the Langmuir adsorption model . The fluorescence method in the ZnS-ZnIn2S4 detected in the reaction system a large number of · OH, which discusses the possible reaction mechanism . Second, the hot water was prepared compound semiconductor photocatalyst ZnS-ZnIn2S4, catalyst SEM, XRD, UV-vis, BET surface area by means of characterization. Prepared by two methods compared catalytic activity and the nature of the similarities and differences . The results show that the catalyst prepared by hydrothermal ZnS-ZnIn2S4 morphological structure , unlike the former , it is only microsphere structure exists , there is no micro- rods and microstrip structure . Hydrothermal activity and hydrogen catalyst specific surface area is less than the former , and the hydrogen activity consistent with the specific surface area reduction ratio . In addition, when the hydrothermal preparation of the catalyst structure and composition of ZnS (40mol%)-ZnIn2S4, its Photocatalytic Hydrogen best .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic
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