摘要
采用电子束蒸发法在玻璃基底上制备了TiO2薄膜及Fe、Cu、Al掺杂TiO2膜,通过XRD、Raman光谱、XPS及AFM等测试手段研究了TiO2膜及金属-TiO2掺杂膜的结构、组成和形貌。金属掺杂量为1%,退火温度为773 K时,沉积得到的薄膜均为锐钛矿晶体结构的TiO2,掺杂金属的种类对薄膜的晶粒尺寸有一定的影响。采用紫外-可见分光光度计测试薄膜的吸收光谱,掺杂后TiO2的吸收带边发生改变,薄膜对可见光的吸收明显加强。光催化降解甲基橙实验表明,制备的TiO2薄膜及其金属掺杂膜具有一定的光催化活性,且Fe-TiO2膜的降解效率较高。
The titanium dioxide(TiO2) thin film and Fe,Cu,Al-doped TiO2 films are prepared by electron beam evaporation on glass substrates.The crystal structures,compositions and surface micrographs of films are studied by means of X-ray diffraction(XRD),Raman spectrum,X-ray photo-electron spectroscopy(XPS) and atomic force microscopy(AFM).The results show that the anatase phase films obtained at doping content of 1% and annealing temperature of 773 K are mainly composed of TiO2.The grain size of films changes obviously as the doped metal ion varies.The optical properties of metal-TiO2 films are analyzed by ultraviolet-visible(UV-Vis) spectral,and the optical band gap of Fe,Cu,Al-TiO2 films narrow from 3.24 eV of TiO2 thin films to 2.98 eV,3.10 eV,3.18 eV respectively.The degradation of methyl orange shows that TiO2 films and metal-TiO2 films possess photocatalytic activity and Fe-TiO2 film has higher degradation efficiency.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2010年第4期547-552,共6页
Journal of Nanjing University of Science and Technology
基金
科技部中白政府间科技合作项目(CB08-9)
南京市科技发展计划项目(200901061)
关键词
TIO2薄膜
锐钛矿
电子束蒸发
金属掺杂
禁带宽度
光催化
titanium dioxide films
anatase
electron beam evaporation
metal-doping
band gap
photocatalysis