THE EFFECT OF CRYSTAL FORM OFN-DOPED TITANIUM DIOXIDE ON VISIBLE-LIGHT PHOTOCATALYTIC ACTIVITY

Jiwei Zhang, Jingwei Zhang, Zhensheng Jin (), Zhishen Wu and Zhijun Zhang
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Jiwei Zhang: Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China
Jingwei Zhang: Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China
Zhensheng Jin: Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China
Zhishen Wu: Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China
Zhijun Zhang: Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China

Surface Review and Letters (SRL), 2009, vol. 16, issue 04, 563-567

Abstract: TiO2samples with different crystal forms were treated in flowingNH3at elevated temperatures to fabricateN-dopedTiO2photocatalysts with different crystal forms. The resultingN-dopedTiO2photocatalysts were characterized by means of X-ray diffraction, transmission electron microscopy, diffusion reflectance spectrometry, and X-ray photoelectron spectroscopy. The visible-light photocatalytic activity of the catalysts was evaluated by measuring the photocatalyzed removal rate of propylene. Results indicate that the visible-light activity ofN-dopedTiO2photocatalysts is highly dependent on the crystal form. Namely,N-doped anataseTiO2has the highest visible-light activity, while the visible-light activity ofN-dopedTiO2photocatalysts decreases with decreasing content of anatase phase and increasing content of rutile phase. In additionN-doped rutileTiO2has no visible-light photocatalytic activity.

Keywords: N-doped titanium dioxide; crystal form; visible-light photocatalyst; photocatalytic activity (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09013013

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