Influence of Ag Doping on the Crystal Structure and Photocatalytic Activity of FeVO4

Abstract:

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Silver (Ag+) doped iron (III) vanadate (FeVO4) samples are prepared by the precipitation method and then characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy(XPS). The photocatalytic activity under visible light is evaluated by photocatalytic degradation of methyl orange (MO) in the solution. The results show that both FeVO4 and Ag+ doped FeVO4 samples are triclinic, the later have different surface morphology, and some needle-shaped materials appear in the later. From XPS, there are more Fe2+ ions in Ag+ doped FeVO4 sample than that in FeVO4 one without Ag+. It indicates that Ag+ doping can increase the density of the surface oxygen vacancies of catalysts, which can act as electron traps promoting the electron-hole separation and then increase the photo-activity. The decoloration rate after Ag+ doping against methyl orange solution can reach about 81%, and be more about 20% than that of pure FeVO4.

Info:

Periodical:

Advanced Materials Research (Volumes 197-198)

Edited by:

Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng

Pages:

919-925

DOI:

10.4028/www.scientific.net/AMR.197-198.919

Citation:

M. Wang and Q. Liu, "Influence of Ag Doping on the Crystal Structure and Photocatalytic Activity of FeVO4", Advanced Materials Research, Vols. 197-198, pp. 919-925, 2011

Online since:

February 2011

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$35.00

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