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Preparation of nano-TiO2 photocatalysts and their decomposition activity in phenol-contaminated water

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Abstract

TiO2 was prepared by the hydrolyzation method in (NH4)2SO4-modified TiCl4 solution, and TiO2 photocatalysts were obtained by accelerating the precipitation of TiO2 powder in a high-temperature water bath. The photocatalysts were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), Raman spectrum and UV-Vis (Ultraviolet-Visible) spectrometry techniques, and the photocatalytic activity in phenol-contaminated water was investigated. The results showed that photocatalysts calcined at 400 °C had a specific surface area of 138.2 m2/g and an average particle size of 9 nm, and a significant increase in thermal stability of anatase phase. At the calcination temperature of 700 °C, the crystal form of TiO2 started to change into rutile (anatase: 97%, rutile: 3%). The activity of TiO2 photocatalysts prepared with (NH4)2SO4-modified TiCl4 solution was markedly stronger than that without (NH4)2SO4-modified TiCl4 solution. Maximal photocatalytic activity was observed at the mole ratio of Ti:(NH4)2SO4=1:2, the water-bath temperature of 90 °C and the calcination temperature of 700 °C.

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Authors and Affiliations

  1. Institute of Catalysis, Faculty of Science, Zhejiang University, Hangzhou, 310028, China

    Xiao-yuan Jiang, Feng Du, Chun-xia Guo, Qiong Yang & Xiao-ming Zheng

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  1. Xiao-yuan Jiang
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  2. Feng Du
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  3. Chun-xia Guo
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  4. Qiong Yang
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  5. Xiao-ming Zheng
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Correspondence to Xiao-yuan Jiang.

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Jiang, Xy., Du, F., Guo, Cx. et al. Preparation of nano-TiO2 photocatalysts and their decomposition activity in phenol-contaminated water. J. Zhejiang Univ. Sci. A 10, 1651–1659 (2009). https://doi.org/10.1631/jzus.A0820687

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  • DOI: https://doi.org/10.1631/jzus.A0820687

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