Preparation and photocatalytic activity of Gd-doped TiO₂ nanofibre

来源期刊：中南大学学报(英文版)2005年第6期

论文作者：周艺 张世英 朱志平 李永坤

文章页码：657 - 661

Key words：photocatalytic activity; two-step synthesis method; Gd-doped TiO2nanofibre; K₂Ti₄O₉; photocatalytic degradation

Abstract: In order to realize the photocatalysis of TiO₂ in the sunlight and directly apply it to waste water treatment, the Gd-doped TiO₂ nanofibre was synthesized using two-step synthesis method as follows: Firstly, potassium carbonate, titanium dioxide and proper gadolinium oxide (dopant) were calcined in the muffle at high temperature and the doped gadolinium K₂Ti₄O₉ fibres were obtained; secondly, the fibre was heated using glycerol as solvent until Gd-doped TiO2nanofibres were obtained. The synthesized samples were characterized using scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The results show that Gd-doped TiO₂ nanofibre heat-treated by glycerol solvent can inhibit the agglomeration, so the grain diameter of the fibre is smaller than that without heat-treated with glycerol. Meanwhile, the diameter of the fibre decreases with the increase of the heating temperature and time. 97% 98% of Gd-doped TiO₂ nanofibre is anatase. The photocatalysis results showed that the photocatalysis activity of Gd-doped TiO₂ nanofibre is just a little lower than that of TiO₂ powder.