Ti^(3+)自掺杂纳米TiO_2的制备、表征与可见光催化活性  

Preparation,Characterization and Visible-Light Photocatalytic Activity of Ti^(3+) Self-doped TiO_2 Nanoparticles

作　　者：王潇彤 李延敏[2] 陈玉静[1] 高善民[1] 

机构地区：[1]鲁东大学化学与材料科学学院,山东烟台264039 [2]鲁东大学生命科学学院,山东烟台264039

出　　处：《鲁东大学学报（自然科学版）》2015年第1期44-51,共8页Journal of Ludong University:Natural Science Edition

基　　金：山东省高等学校科技计划项目(J12LA01);山东省自然科学基金重点项目(ZR2013EMZ001)

摘　　要：以Ti H2和H2O2为原料,采用水热法制备了米粒状Ti3+自掺杂的TiO2纳米颗粒.采用X-射线衍射(XRD)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)和X-射线光电子能谱(XPS)对所制备样品的结构、结晶性、形貌和元素的存在状态进行了表征分析.电子顺磁共振谱(ESR)结果表明所制备的样品中含有晶格Ti3+和表面Ti3+.紫外—可见(UV-Vis)漫反射光谱表明这种Ti3+自掺杂的纳米TiO2在可见光区中有较强的吸收.在可见光辐射下,所制备的样品具有优于商业化P25 TiO2的光催化分解水和光催化降解次甲基蓝(MB)溶液的性能.其中160℃下水热处理27 h所得样品光催化降解MB的性能是P25 TiO2的9倍,而光催化分解水制氢的性能是P25 TiO2的12.5倍.Rice-shaped Ti^3＋self-doped TiO2 nanoparticles were prepared by hydrothermal treatment of Ti H2 in H2O2aqueous solution.The structure,crystallinity,morphology,and other properties of the as-prepared samples were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,high-resolution transmission electron microcopy（HRTEM） and X-ray photoelectron spectra（XPS）.Electron spin resonance（ESR） spectroscopy confirmed the presence of paramagnetic Ti^3＋in the bulk and surface of the as-prepared samples.The particles showed a strong absorption in the visible light region.Under visible light irradiation,the samples exhibited higher photocatalytic activity for hydrogen evolution and photooxidation of methylene blue than that of the commercial P25 TiO2 nanoparticles.The sample obtained at 160℃ for 27 h showed a 9-fold enhancement for the visible light decomposition of methylene blue and 12.5 times higher for H2 production in comparison to P25 TiO2.

关 键 词：TIO2 Ti^3+自掺杂 制备 可见光催化 

分 类 号：O614.4[理学—无机化学]