(1. 东北大学 材料与冶金学院，沈阳 110004；
2. 沈阳理工大学 环境与化学工程学院，沈阳 110168；
3. 辽宁省教育厅，沈阳 110000)
摘 要: 以TiCl3为原料、过硫酸铵为引发剂，采用高分子网络凝胶法制备TiO2复合粉体，利用TEM和XRD对纳米粉体表征。研究结果表明：纯TiO2和掺Sn4+纳米粉体基本没发生团聚；La3+掺杂改性的催化剂为锐钛矿型TiO2，掺杂稀土镧会抑制TiO2晶型的转变，使晶型转变温度滞后。掺杂Sn4+和La3+能够有效抑制光生电子和空穴的复合，从而提高催化剂活性。
关键字: 高分子网络凝胶；二氧化钛；光催化
（1. School of Materials and Metallurgy, Northeast University, Shenyang 110004, China;
2. School of Environmental and Chemical Engineering; Shenyang Ligong University, Shenyang 110168, China;
3. Department of Education of Liaoning Province, Shenyang 110000, China）
Abstract:With TiCl3 and (NH4)2S2O8 as original material, TiO2 was produced with polymer network gel method. The characteristics of nanopowder were measured by XRD and TEM. The results show that pure TiO2 and composite powder with Sn4+ can not unite, and the TiO2 catalyzer doped with La3+ belongs to anatase type. Doping La3+ depresses the crystallographic transformation of TiO2 and postpones the transformation temperature. Doping with Sn4+ and La3+ metal ions can improve the activity, because ions restrain the combination of photoelectron and cavity.
Key words: polymer network gel; titanium dioxide; photocatalysis
