Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (04): 633-638.doi: 10.3866/PKU.WHXB20080415

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Kinetic Behavior of Visible Light Photocatalytic Oxidation of Propylene for N-Doped Nano-TiO2

FENG Cai-Xia; WANG Yan; JIN Zhen-Sheng; ZHANG Shun-Li   

  1. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan Province, P. R. China; Functional Material Research Center, Kaifeng University, Kaifeng 475004, Henan Province, P. R. China
  • Received:2007-08-22 Revised:2007-12-26 Published:2008-04-07
  • Contact: JIN Zhen-Sheng E-mail:zhenshengjin@henu.edu.cn

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Abstract: N-doped TiO2 (anatase) with high visible light photocatalytic activity was prepared by treating nanotube titanic acid (NTA) in NH3 flowat different temperatures. The crystalline structure of N-doped TiO2 determined by XRD was anatase when the treating temperature was higher than 400 ℃, however, a newphase (TiN) emerged at 700 ℃. The UV-Vis diffuse reflectance spectra (DRS) display that N-doped TiO2 has a continuous absorption at λ=400 nm. The photocatalytic activity of the N-doped TiO2 was determined by the photocatalytic oxidation of propylene under visible light irradiation. The highest photocatalytic activity was obtained for the catalyst treated at 600 ℃ in NH3 flow, which was active even under λ=500 nm, its kinetic behavior was accordant with the first order reaction formula.

Key words: Nanotube titanic acid, Dioxide titanium, Nitrogen doped, Visible light photocatalysis