Characterization and Photocatalytic Activity of ZnO/AgNbO3

doi:10.3724/SP.J.1077.2010.00935

Abstract

Abstract:

ZnO/AgNbO₃ hetero-junction photocatalysts were prepared by impregnation method. The samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), scan electron microscope (SEM) and UV-Vis diffusion reflectance spectra (DRS). The results indicated that Zn dopant did not change the crystal structures of AgNbO₃. With increasing Zn content and calcination temperature, the ZnO phase formed in the ZnO/AgNO₃. XPS analysis indicated that Zn²⁺ existed as ZnO. The DRS spectra showed that Zn dopant enhanced the ability of visible light absorption of the ZnO/AgNbO₃samples. The photocatalysts doping with ZnO exhibited the enhanced photocatalytic activities for degradation of methylene blue (MB) under visible light and UV light irradiation. The highest efficiency was obtained when the sample calcined at 300℃ with 3 wt% Zn content under UV light irradiation. The mechanism of improving photocatalytic activity was also discussed.

Key words: photocatalytic, ZnO/AgNbO3, methylene blue, characterization

CLC Number:

O643

SHU Huo-Ming, XIE Ji-Min, XU Hui, LI Hua-Ming, XU Yuan-Guo, GU Zheng. Characterization and Photocatalytic Activity of ZnO/AgNbO₃[J]. Journal of Inorganic Materials, 2010, 25(9): 935-941.

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Characterization and Photocatalytic Activity of ZnO/AgNbO₃

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