Abstract： To study the photocatalytic property of TiO₂ nano-particles doped with Gd³⁺ and C⁴⁺, the amount of Gd³⁺ and C⁴⁺, different calcination temperatures and atmospheres were chosen in the experiment．The Gd³⁺-C⁴⁺ co-doped TiO₂ composite powders were prepared by a simple sol-gel method. XRD, TEM, specific surface analysis were used to characterize the composite powders．The results show that TiO₂ crystals co-doped withGd³⁺-C⁴⁺ and calcined at 550 ℃ for 2 h in nitrogen are anatase structure， the composite powders disperse evenly. When the molar ratio of Gd³⁺ and C⁴⁺ is 0.06, it possesses 90% degradation ratio of rhodamine B after 3 h sunlight irradiation.

Keywords: titania; doping; photocatalytic activity

中图分类号：TQ426，TB383        文献标志码：A

文章编号：1008-5548（2015）04-0040-05

DOI:10.13732/j.issn.1008-5548.2015.04.009

收稿日期：2014-07-20， 修回日期：2014-08-04，在线出版时间：2015-08-26。

第一作者简介：钟春燕（1984—），女，硕士，讲师，研究方向为无机精细材料的制备与应用。 E-mail：65544826@qq.com。