(1. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110004；
2. 沈陽理工大學(xué) 環(huán)境與化學(xué)工程學(xué)院，沈陽 110168；
3. 遼寧省教育廳，沈陽 110000)
摘 要: 以TiCl3為原料、過硫酸銨為引發(fā)劑，采用高分子網(wǎng)絡(luò)凝膠法制備TiO2復(fù)合粉體，利用TEM和XRD對納米粉體表征。研究結(jié)果表明：純TiO2和摻Sn4+納米粉體基本沒發(fā)生團(tuán)聚；La3+摻雜改性的催化劑為銳鈦礦型TiO2，摻雜稀土鑭會抑制TiO2晶型的轉(zhuǎn)變，使晶型轉(zhuǎn)變溫度滯后。摻雜Sn4+和La3+能夠有效抑制光生電子和空穴的復(fù)合，從而提高催化劑活性。
關(guān)鍵字: 高分子網(wǎng)絡(luò)凝膠；二氧化鈦；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
