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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (11): 1651-1659    DOI: 10.1631/jzus.A0820687
Chemical and Energy Engineering     
Preparation of nano-TiO2 photocatalysts and their decomposition activity in phenol-contaminated water
Xiao-yuan JIANG, Feng DU, Chun-xia GUO, Qiong YANG, Xiao-ming ZHENG
Institute of Catalysis, Faculty of Science, Zhejiang University, Hangzhou 310028, China
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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.

Key words： Ammonium sulfate      Titanium dioxide      Photocatalysis reaction      Phenol-contaminated water     
Received: 05 October 2008     
CLC:  R733.7  
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Xiao-yuan JIANG
Feng DU
Chun-xia GUO
Qiong YANG
Xiao-ming ZHENG
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Xiao-yuan JIANG, Feng DU, Chun-xia GUO, Qiong YANG, Xiao-ming ZHENG. Preparation of nano-TiO2 photocatalysts and their decomposition activity in phenol-contaminated water. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(11): 1651-1659.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820687     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I11/1651

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