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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Photocatalytic Activity of Sol-Gel TiO_2 Thin Films on Various Kinds of Glass Substrates:The Effects of Na~+ and Primary Particle Size
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Photocatalytic Activity of Sol-Gel TiO_2 Thin Films on Various Kinds of Glass Substrates:The Effects of Na~+ and Primary Particle Size

机译：溶胶-凝胶TiO_2薄膜在不同类型玻璃基板上的光催化活性：Na〜+和一次粒径的影响

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摘要

To study the effects of ions diffused from the glass substrate on TiO_2 photocatalysis,TiO_2 thin films were prepared on different kinds of glass substrates at different heating temperatures.The TiO_2 films were characterized using X-ray photoemission spectroscopy (XPS),X-ray diffraction (XRD),ellipsometry,and absorption spectroscopy.The photocatalytic activities of the TiO_2 thin films were evaluated using the degradation reaction of trichloroethylene (TCE).Diffused ions such as Na~+ and Si~(4+) raised the anatase formation temperature and increased the particle size of TiO_2 thin films (r_c).The photocatalytic activity of the thin films largely depended on the particle size of TiO_2;the reciprocal number of the half-life of the TCE degradation,t_(1/2)~- was roughly proportional to r_c~(-1.8).The conventional recombination center hypothesis for the Na~+ ions might not hold for the sol-gel TiO_2 films.
机译：为了研究玻璃基板上扩散的离子对TiO_2光催化的影响，在不同加热温度下，在不同种类的玻璃基板上制备了TiO_2薄膜。利用X射线光电子能谱（XPS），X射线衍射对TiO_2薄膜进行了表征。三氯乙烯（TCE）的降解反应评价了TiO_2薄膜的光催化活性。Na〜+和Si〜（4+）等离子的扩散提高了锐钛矿的形成温度。 TiO_2薄膜的光催化活性在很大程度上取决于TiO_2的粒径; TCE降解半衰期的倒数t_（1/2）〜-为大约与r_c〜（-1.8）成正比。Na〜+离子的常规复合中心假设可能不适用于溶胶-凝胶TiO_2薄膜。

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