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Citation: LI Xiao-Hui, CHEN Xiao-Yun, LIU Shou-Xin, CHEN Xi, WANG Hai-Liang, LIU Zheng-Feng. Preparation and Characterization of Nanosize TiO_2 Photocatalyst Obtained via Acid Catalyzed Hydrolysis Method[J]. Chinese Journal of Applied Chemistry, ;2007, 24(11): 1279-1283. shu

Preparation and Characterization of Nanosize TiO_2 Photocatalyst Obtained via Acid Catalyzed Hydrolysis Method

1.
College of Material Science and Engineering, Northeast Forestry University, Harbin 150040

Corresponding author: LIU Shou-Xin,
Received Date: 21 December 2006
Available Online: 30 April 2007
Fund Project: 教育部博士点基金(20050225006) (20050225006)国家自然科学基金(30400339)资助项目 (30400339)

An acid was used as the catalyst to adjust the hydrolysis rate of TiCl₄, and a high active nanosize TiO₂ photocatalyst was obtained by means of acid catalyzed hydrolysis method. Various preparation parameters such as the kind of acid catalysts, hydrolysis temperature and calcination temperature were optimized by means of phenol degradation. XRD, DRS, SEM and N₂ adsorption isotherm were used for the characterization of TiO₂ photocatalyst. The optimal preparation conditions were determined as: catalyst:HCl, hydrolysis reaction temperature:98℃, and calcination temperature:500℃. The prepared TiO₂ precursor was uncrystalline. With the increasing of calcination temperature, uncrystalline was transformed into anatase, accompanyed with the threshold red-shift, SBET decreased and particle size increased. Completely transformation of anatase to rutile can be realized at 800℃.
- TiO₂,
- acid catalyzed hydrolysis,
- photocatalysis,
- phenol
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