摘要
以钛酸四丁酯、硝酸铜和硝酸铝为先驱原料,乙醇为溶剂,二乙醇胺为稳定剂制备了玻璃基TiO2/(Cu,Al)复合薄膜。采用XRD、SEM和分光光度计研究了薄膜焙烧温度对复合薄膜晶相组成、形貌以及可见光催化活性的影响,采用UV-Vis分光光度计表征了混合离子加入量对复合薄膜光谱响应的影响规律。结果表明,掺杂混合离子的TiO2复合薄膜在450℃即可开始形成锐钛矿相,直至600℃一直保持锐钛矿相,表现出很好的晶体结构稳定性,而纯TiO2薄膜550℃焙烧时即出现金红石相;SEM晶相结构显示550℃焙烧的复合薄膜晶体形成均匀,致密,对基片覆盖率高,相应的可见光催化活性也最高;随着混合离子加入量的增加,光谱响应吸收边不同程度地红移至可见区,尤以掺杂量n=2 mol的Ti100-x/CuxAl2x复合薄膜吸收边红移最大(较纯TiO2薄膜大约红移75 nm)。光催化实验表明,复合薄膜的可见光活性显著提高,掺杂量n=2 mol的Ti100-n/CunAl2n复合薄膜对酸性红B的降解脱色率可达67.3%,比纯TiO2的降解脱色率(5.5%)提高了近12倍。
TiC2 （Cu/Al） nanometer film on glass was prepared by the sol-gel method and its crystal structure and surface morphology was detected with XRD, TEM and spectrophotometer. The spectral response of the film was determined with UV-vis diffuse reflectance spectrum. The results indicate that the anatase crystal structure of Cu/Al doped TiC2 composite film formed at 450-600℃, suggesting that the stability of film crystal structure. Comparatively, the rutile crystal structure was found in pure TiC2 film while the temperature reached 550℃. The film sintered at 550 ℃ is symmetrical and compact in crystal grains and its photocatalytic activity is preferable. The absorption edges is red-shifted to visible light area obviously if increasing the mixed ion, in which the Ti100-n/Cu.Al2. film doped with n ： 2 tool showed shift maximally. The discolored rate of the the Ti100-n/CunAl2n film doped with n ： 2 tool on acidic red B is 67.3%.
出处
《大连工业大学学报》
CAS
北大核心
2009年第5期357-361,共5页
Journal of Dalian Polytechnic University
基金
辽宁省教育厅A类项目(20060176)
