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

fYear

2011

fDate

14-15 April 2011

Firstpage

1

Lastpage

6

Abstract

A series of Cd_xIn₂S₄-Zn_1-xIn₂S₄ composite photocatalysts has been synthesized by hydrothermal method. The physical and photophysical properties of the Cd_xIn₂S₄-Zn_1-xIn₂S₄ photocatalysts were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectrum, X-ray photoelectron spectroscopy and scanning electron microscopy. Cd_xIn₂S₄-Zn_1-xIn₂S₄ could form composite semiconductors with cubic spinel phase in agreement with CdIn₂S₄. The absorption edges of Cd_xIn₂S₄-Zn_1-xIn₂S₄ were red-shifted and the band gaps energy gradually reduced with the increasing of x value in Cd_xIn₂S₄-Zn_1-xIn₂S₄. Cd_xIn₂S₄-Zn_1-xIn₂S₄ series photocatalysts were used in the photodecomposition of H₂S to H₂. The results indicated that the photocatalyst of Cd_0.3In₂S₄-Zn_0.7In₂S₄ 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/GREEN.2011.5754877

Filename

5754877