Study on Photocatalytic Reduction Hg2+ by TiO2 Film

doi:10.7517/j.issn.1674-0475.2005.06.460

Imaging Science and Photochemistry ›› 2005, Vol. 23 ›› Issue (6): 460-466.DOI: 10.7517/j.issn.1674-0475.2005.06.460

Study on Photocatalytic Reduction Hg²⁺ by TiO₂ Film

YANG Li, WU Guang-hui, ZHOU Wei, SHI Wu-long

Department of Enviroment and Chemistry Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, Jiangxi, P. R. China

Received:2005-03-28 Revised:2005-06-29 Online:2005-11-23 Published:2005-11-23

Abstract

Abstract: TiO₂、SO₄^2-/TiO₂、CdS/TiO₂ film photocatalysts were prepared by sol method.The optimum experimental conditions for photocatalytic reduction Hg²⁺ using TiO₂ film and the photocatalytic activity comparision among SO₄^2-/TiO₂,CdS/TiO₂,and TiO₂ film,between TiO₂ powder and film were investigated.The results were as follows: the best reduction efficiency of Hg²⁺ was obtained under UV irradiation for 30 min at pH=5.34,the photoreduced mass of Hg²⁺ was more lower with the Hg²⁺ initial concentration increasing,the reduction efficiency was promoted under shorter wavelength,the reduction efficiency reached 100% after 30 min at the additon of methanol=15%(v/v),the photocatalytic activity of CdS-modified film was higher than that of unmodified film,the photocatalytic activity of CdS/TiO₂ film was better than that of powder.

Key words: sol method, SO₄^2-/TiO₂, CdS/TiO₂, methanol, photocatalytic reduction, Hg²⁺

CLC Number:

YANG Li, WU Guang-hui, ZHOU Wei, SHI Wu-long. Study on Photocatalytic Reduction Hg²⁺ by TiO₂ Film[J]. Imaging Science and Photochemistry, 2005, 23(6): 460-466.

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Study on Photocatalytic Reduction Hg²⁺ by TiO₂ Film

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