作　　者： ; ; ;

机构地区： 华南师范大学化学与环境学院

出　　处： 《华南师范大学学报（自然科学版）》 2008年第3期82-88,共7页

摘　　要： 采用十六烷基三甲基溴化铵(CTAB)/正己醇/水微乳体系合成纳米TiO2/SiO2复合物,用X射线衍射、投射电镜和热重分析法对其结构进行了表征,并以碱性品红降解评价了其光催化性能,讨论了煅烧温度与光催化活性的关系.光催化实验表明TiO2/SiO2复合物降解碱性品红能力优于纯TiO2;TiO2/SiO2复合物的光催化活性随煅烧温度先增加后减少,煅烧温度在800℃时TiO2/SiO2复合物的光催化活性最好. Nanosized TiO2/SiO2 particles were synthesized by hydrolusis of tetrabutyl titanate and tetraethyl orthosilicate in a CTAB/n - hexanol/water reverse microemulsion. The particles were characterized by X - ray diffraction, transmission electron microscopy, and TG - DSC. The photocatalytic activity was evaluated by photocatalytic degradation of alkaline fuchsin under UV light and visible light irradiation. The effects of calcined temperatures on the photocatalytic activity were discussed. The experiment of photocatalysis shows that the activity of TiO/SiO2 is better than the pure TiO2; the photocatalytic activity of TiO/SiO2 increases while the calcined temperature grows from 500 ℃ to 800 ℃, and decreases from 800 ℃ to 1 000 ℃. Therefore, 800 ℃ is the best calcining temperature.

关 键 词： 微乳法 光催化 二氧化钛 二氧化硅 碱性品红

领　　域： [理学] [理学]