Titania（TiO2） nanorod powder was prepared by nonhydrolytic sol-gel method using titanic chloride（TiCl4） as titanium source, methylene dichloride（CH2Cl2） as solvent, absolute ethyl alcohol（CH（-3）CH2OH） as oxy...Titania（TiO2） nanorod powder was prepared by nonhydrolytic sol-gel method using titanic chloride（TiCl4） as titanium source, methylene dichloride（CH2Cl2） as solvent, absolute ethyl alcohol（CH（-3）CH2OH） as oxygen donor. The effects of Si^（4＋） doping on the TiO2 nanocrystalline phase transformation temperature were systematically researched. The results showed that when the molar ratio of Ti^（4＋） to Si^（4＋） is 1 to1.3, TiO2 prepared by calcination at 1 100 ℃ for 1 hour exhibits rod shape and has good photocatalytic activity. Doping of Si^（4＋） makes glass phase core-shell structure forming on the surface of anatase crystal particles, which can inhibit crystal phase transformation and raise the transformation temperature, making TiO2 stable in anatase phase at 1 200 ℃.展开更多
基金Funded by the National Natural Science Foundation of China(No.51302064)
文摘Titania（TiO2） nanorod powder was prepared by nonhydrolytic sol-gel method using titanic chloride（TiCl4） as titanium source, methylene dichloride（CH2Cl2） as solvent, absolute ethyl alcohol（CH（-3）CH2OH） as oxygen donor. The effects of Si^（4＋） doping on the TiO2 nanocrystalline phase transformation temperature were systematically researched. The results showed that when the molar ratio of Ti^（4＋） to Si^（4＋） is 1 to1.3, TiO2 prepared by calcination at 1 100 ℃ for 1 hour exhibits rod shape and has good photocatalytic activity. Doping of Si^（4＋） makes glass phase core-shell structure forming on the surface of anatase crystal particles, which can inhibit crystal phase transformation and raise the transformation temperature, making TiO2 stable in anatase phase at 1 200 ℃.
