Low temperature synthesis of visible light-driven vanadium doped titania photocatalyst

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• 作者：Hong Li ; Gaoling Zhao ; Zhijun Chen ; Gaorong Han ; Bin Song
• 关键词：Photocatalyst ; Low temperature ; TiO₂ ; Sol– ; gel
• 刊名：Journal of Colloid and Interface Science
• 出版年：2010
• 出版时间：15 April 2010
• 年：2010
• 卷：344
• 期：2
• 页码：247-250
• 全文大小：695 K

文摘

A simple method based on sol–gel method was developed to prepare vanadium ions doped TiO₂ nanocrystalline at low temperature. Thus-obtained vanadium doped TiO₂ was proved to be V_xTi_1−xO₂ solid solution. Doping vanadium could enhance the formation of stable phase. Its optical absorption spectrum shows a red shift to 445 nm. Photodegradation experiments suggest that thus-prepared vanadium doped TiO₂ nanocrystalline can be excited by visible light and is a good photocatalyst under daylight. These properties are the same as the vanadium doped TiO₂ prepared under high temperature conditions (350 °C). However, in the present work, the vanadium doped TiO₂ crystal particle is very uniform and fine, about 5 nm. It is much smaller than the production prepared under high temperature.