摘要
用溶胶 凝胶法制备了纳米WO3 TiO2复合薄膜型光催化剂·利用该薄膜对罗丹明B溶液的光催化降解作用,考察了钨酸盐种类及其掺杂量、涂膜层数、溶解氧、焙烧温度、焙烧时间、基体材料等因素对光催化活性的影响·结果表明,钨酸铵加入量x(W)=1 5%、多孔钛片为基质,涂覆9层、500℃下焙烧1h得到的WO3 TiO2薄膜型复合光催化剂活性最高,其光催化活性较纯TiO2光催化剂提高1 5倍·该温度下多孔钛片负载的TiO2为锐钛矿型·
The nanocrystal composite photocatalyst WO3TiO2 was prepared by solgel process in form of film. The effects of various tungstates with their doping amounts, the number of coating layers, the dissolved oxygen, the roasting temperature/time and various substrates on the photocatalytic activity were investigated through the photodecomposition action of films to the solution of Rhodamine B. The results showed that the composite WO3TiO2 film with highest photocatalytic activity is obtained as the doping amount of (NH4)5H5[H2(WO4)]·H2O x(W)=15%, the substrate being porous Ti plate and the number of the layers being 9 for 1 hour roasting time at 500?℃ due to its photocatalytic activity being 1.5 times higher than that of pure TiO2. Meanwhile the phase of the composite WO3TiO2 film thus formed is attributed to anatase phase.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第11期1064-1067,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50104003).
关键词
光降解
二氧化钛
溶胶-凝胶法
薄膜
复合
photodegradation
composite
TiO_2
sol-gel process
film coating
