摘要
采用改进的化学沉积法,用ZnO对TiO2-纳米管进行改性,制备ZnO/TiO2-纳米管的复合半导体材料。用X射线衍射仪、透射电镜、高分辨透射电镜、X射线能谱仪、比表面分析仪,紫外-可见光度计等研究样品的结构、表面形貌和化学组成。通过光降解甲基橙模拟污染物考察其光催化性能,并探讨ZnO粒子表面修饰增强TiO2-纳米管光催化活性的机制。结果表明:n(Zn)-n(Ti)为1-4的ZnO/TiO2-纳米管复合材料具有最佳的光催化活性;Zn和Ti的协同效应改善了复合材料的可见光响应性。
TiO2-nanotubes（TiO2-NTs） coated with nanosized ZnO particles were synthesized by a modified deposition-precipitation process. The obtained products were characterized by XRD, TEM, HRTEM, XPS, BET and UV-Vis to reveal the structures, micrography and composition of ZnO/TiO2-NTs. The photodegradations of methyl orange with ZnO/TiO2-NTs as photocatalysts were carried out to investigate the photocatalytic activity of ZnO/TiO2-NTs. The photocatalytic mechanism for ZnO/TiO2-NTs with high photocatalytic activity was proposed. The results show that the ZnO/TiO2-NT with molar ratio of Zn to Ti of 1-4 exhibits excellent photocatalytic activity for photodegradation of methyl orange. The enhanced photocatalytic activities for ZnO/TiO2-NTs own to the synergistic effect of Zn and Ti, resulting in the improved response to UV-Vis light.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第7期1382-1389,共8页
The Chinese Journal of Nonferrous Metals
基金
湖南省科技计划资助项目(2009FJ3097)
长沙市科技计划资助项目(K0902131-11)
广西青年基金资助项目(0728107)
关键词
TiO2-纳米管
ZNO
表面修饰
可见光
光催化机理
TiO2-nanotube
zinc oxide
surface modification
visible light
photocatalytic mechanism
作者简介
通信作者：段学臣，教授：电话：0731—88830503：E-mail：xc_d@163．net
