Title :
Photodecomposition of H2s to H2 over CdxIn2S4-Zn1-xIn2S4 Composite Photocatalysts
Author :
Lv Hongfei ; Shan Wenyan ; Bai Xuefeng
Author_Institution :
Sch. of Chem. & Environ. Eng., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
A series of CdxIn2S4-Zn1-xIn2S4 composite photocatalysts has been synthesized by hydrothermal method. The physical and photophysical properties of the CdxIn2S4-Zn1-xIn2S4 photocatalysts were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectrum, X-ray photoelectron spectroscopy and scanning electron microscopy. CdxIn2S4-Zn1-xIn2S4 could form composite semiconductors with cubic spinel phase in agreement with CdIn2S4. The absorption edges of CdxIn2S4-Zn1-xIn2S4 were red-shifted and the band gaps energy gradually reduced with the increasing of x value in CdxIn2S4-Zn1-xIn2S4. CdxIn2S4-Zn1-xIn2S4 series photocatalysts were used in the photodecomposition of H2S to H2. The results indicated that the photocatalyst of Cd0.3In2S4-Zn0.7In2S4 exhibited the highest photocatalytic activity with the rate of H2 evolution to be 590 imol/(h·g) under visible light irradiation.
Keywords :
II-VI semiconductors; X-ray diffraction; X-ray photoelectron spectra; cadmium compounds; catalysis; catalysts; hydrogen; indium compounds; photodissociation; scanning electron microscopy; zinc compounds; CdInS-ZnInS; H2; H2S; UV-Vis diffuse reflectance spectrum; X-ray diffraction; X-ray photoelectron spectroscopy; absorption edges; composite photocatalysts; cubic spinel phase; hydrothermal method; photodecomposition; red-shift; scanning electron microscopy; Absorption; Hydrogen; Photonic band gap; Production; Radiation effects; Reflectivity; X-ray diffraction;
Conference_Titel :
Green Technologies Conference (IEEE-Green), 2011 IEEE
Conference_Location :
Baton Rouge, LA
Print_ISBN :
978-1-61284-713-9
Electronic_ISBN :
978-1-61284-714-6
DOI :
10.1109/GREEN.2011.5754877
