Effects of Rare Earth Elements on Photocatalytic Antibacterial Properties of Nanometer TiO2 Powders
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第3期
论文作者：Meng Junping LIANG Jinsheng Ou Xiuqin GAO Ning
Key words：composite materials; titanium dioxide; powders; antibacterial properties; photocatalytic activities; rare earth elements; functional materials; electronic spin resonance(ESR);
Abstract: Nanometer Ce/TiO2 functional materials with photocatalystic antibacterial properties were prepared by dipping TiO2 nanometer powders into RE( NO3 )·nH2O solutions, filtrating, drying and heat treatment, and the enhancement mechanisms of Ce on the nanometer TiO2 were studied by electronic spin resonance(ESR) The results show that TiO2 for photocatalystic antibacterial properties is strengthened evidently by adding Ce, which has a high efficiency of photocatalystic antibacterial properties with the light extent of visible light and ultraviolet radiation. The basic reason for obtaining the strengthened result is that the effective wave length of photocatalystic properties of TiO2 can be expanded to visible light area with the induction of the rare earth elements, whether or not ultraviolet light exists, nanometer TiO2 can produce a great deal of hydroxylic radical(·OH) by treating with rare earth elements.
Meng Junping1，LIANG Jinsheng1，Ou Xiuqin1，GAO Ning2
(1.Institute of Power Source & Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China;
2.School of Material Science and Technology, Tianjin University, Tianjin 300072, China)
Abstract:Nanometer Ce/TiO2 functional materials with photocatalystic antibacterial properties were prepared by dipping TiO2 nanometer powders into RE( NO3 )·nH2O solutions, filtrating, drying and heat treatment, and the enhancement mechanisms of Ce on the nanometer TiO2 were studied by electronic spin resonance(ESR) The results show that TiO2 for photocatalystic antibacterial properties is strengthened evidently by adding Ce, which has a high efficiency of photocatalystic antibacterial properties with the light extent of visible light and ultraviolet radiation. The basic reason for obtaining the strengthened result is that the effective wave length of photocatalystic properties of TiO2 can be expanded to visible light area with the induction of the rare earth elements, whether or not ultraviolet light exists, nanometer TiO2 can produce a great deal of hydroxylic radical(·OH) by treating with rare earth elements.
Key words:composite materials; titanium dioxide; powders; antibacterial properties; photocatalytic activities; rare earth elements; functional materials; electronic spin resonance(ESR);
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