Y掺杂纳米TiO_2的合成及晶型转变过程

Preparation and Polymorphic Transition of Nanosized Y-doped TiO_2

以钛酸四丁酯和硝酸钇为原料 ,采用溶胶 -凝胶法制备了掺杂不同量 Y的 Ti O2 纳米材料 ,通过XRD、TEM、TG-DTA对产物的晶体结构、晶粒大小、形貌进行了表征 ,并研究了 Ti O2 在锐钛型和金红石型之间的晶型转变过程。结果表明 ,产物的平均粒径为 3 0 nm左右。Y的掺入延缓了 Ti O2

Nanosized TiO 2 and Y doped TiO 2 were synthesized from Ti(OC 4H 9) 4 and Y(NO 3) 3 by a sol gel method. The structure, size, appearance, and the polymorphic transition between anatase and rutile of TiO 2 crystal types were examined by XRD, TEM, TG DTA. The results indicate the average particle size of TiO 2 crystal is about 30 nm and the doped Y prevents the transition of TiO 2 from anatase to rutile.