掺锌的TiO_2纳米粉的结构相变及发光性质

Structural Phase Transformation and Photoluminescence of Zn doped TiO 2 Nanopowders

采用溶胶－凝胶法制备了掺锌的ＴｉＯ２纳米粉末，并用ＸＲＤ、ＴＥＭ、ＴＧ和ＤＳＣ等技术考察了掺入的锌对ＴｉＯ２的锐钛矿→金红石结构相变的影响．研究结果表明，锌的掺入可促进ＴｉＯ２的结构相变，使相变温度显著降低．纳米态ＴｉＯ２存在室温光致发光现象，在ＴｉＯ２的纳米粉中掺入适量的锌。

Zn doped titania nanopowders was prepared by sol gel method. Influence of the dopant on the anatase to rutile phase transformation of TiO 2 was investigated. It was found that the Zn dopant can effectively enhance the transformation by lowering the transition temperature. In addition, photoluminescence of gel derived TiO 2 nanopowders under 228 nm light excition can be observed at room temperature, and its relative luminescence intensity can be increased by doping Zn into the titania nanopowders.