Photoactivity and phase stability of ZrO<sub>2</sub>-doped anatase-type TiO<sub>2</sub> directly formed as nanometer-sized particles by hydrolysis under hydrothermal conditions期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Photoactivity and phase stability of ZrO₂-doped anatase-type TiO₂ directly formed as nanometer-sized particles by hydrolysis under hydrothermal conditions

Authors:	Masanori Hirano Chiaki Nakahara Keisuke Ota Osamu Tanaike Michio Inagaki

Institution:	Department of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Yachigusa, Yakusa, Toyota, 470-0392 Japan

Abstract:	Anatase-type TiO₂ doped with 4.7 and 12.4 mol% ZrO₂ that were directly precipitated as nanometer-sized particles from acidic precursor solutions of TiOSO₄ and Zr(SO₄)₂ by simultaneous hydrolysis under hydrothermal conditions at 200°C, showed higher photocatalytic activity than pure anatase-type TiO₂ for the decomposition of methylene blue. The crystallite growth and the phase transformation from anatase-type to rutile-type structure caused by heating at high temperature were retarded by doping ZrO₂ into TiO₂. The anatase-type TiO₂ doped with ZrO₂ showed high phase stability and maintained anatase-type structure even after heating at 1000°C for 1 h.

Keywords:	Titanium oxide Anatase Zirconium oxide Methylene blue Photocatalytic activity
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