摘要
以钛酸丁酯Ti(OBu)4为原料,采用溶胶-凝胶法在普通钠钙玻璃表面制备了TiO2纳米薄膜,用XRD、UV-VIS等技术对薄膜微结构及紫外吸收性能进行了表征,选用食用油光催化降解为模型对TiO2薄膜光催化性能进行了评价。探讨了退火温度对薄膜晶相结构及其光催化活性的影响,450℃退火处理的薄膜呈锐钛矿和金红石型混晶结构,锐钛矿相平均晶粒尺寸为28.8 nm,金红石相平均晶粒尺寸为40.4 nm,700℃退火后为纯金红石相。焙烧温度在450—490℃光催化活性较为理想,480℃附近光催化活性达到最高。涂膜层数增加,光催化活性增强,8层膜的光催化活性最高。
Nano-TiO2 films were prepared by sol-gel method on the normal glass substrates using Ti （OBu） as precursor. The microstructure and UV absorbability of films were measured by using XRD, UV-VIS technology. The photocatalytic activity of TiO2 films was evaluated by the degradation of the cooking oil. The influences of dippinglayers and calcinations temperature of the films on crystalloid microstructure and photocatalytic activity were investigated. The results show that the TiO2 thin films are of anatase and rutile phase structures at 450 ℃. When heated up to 700 ℃, the structure of TiO2 film changed into futile completely. The calcinations temperature at 450 - 490 ℃ is efficient and photocatalytic activity at 480 ℃ is better. The photocatalytic activity of films is higher when the thickness of films is much thicker. The photocatalytic activity of eight-layer film is the highest.
出处
《化学工程》
CAS
CSCD
北大核心
2006年第5期41-44,共4页
Chemical Engineering(China)
基金
陕西省科技厅科技攻关项目(2004k05-G26)
