TiO2/ACF复合光催化材料的制备及性能

摘要

The immobilization of powder photocatalyst on the suitable carrier is the key to improve the stability of photocata⁃lyt. TiO2/ACF composite photocatalyst was prepared by sol⁃gel method with Ti(OC4H9)4 and activated carbon fibe (ACF) in this pa⁃per. The micro⁃structure of composte photocatalyst were characterized by means of X⁃ray diffraction, DSC⁃TG and SEM respective⁃ly. Under the ultraviolet light, the photocatalytic activity of the composite photocatalyst was evaluated by degradation of formalde⁃hyde. The effects of different preparation conditions on the structures and properties of composite photocatalyst were investigated, such as the calcined temperature, the calcined time, the loaded times and the loaded time, etc. The results showed that when cal⁃cined at the temperature of 400℃for 2 hours and loaded 3 times for 6 minutes, the TiO2/ACF composite photocatalyst achieved its best photocatalyic performance.%用适宜载体将粉体材料固定是提高光催化材料稳定性的关键。采用溶胶-凝胶法，以钛酸丁酯为原料，选取活性炭纤维（ACF）为载体，制备了TiO2/ACF复合光催化材料。利用X射线衍射仪（XRD）、热分析仪（DSC-TG）和扫描电子显微镜（SEM）等测试技术对复合光催化材料的结构进行了表征分析。在紫外光照射下，通过对甲醛气体的光催化降解，考察了煅烧温度、煅烧时间、负载次数和负载时间等不同制备条件对复合光催化材料结构和性能的影响，结果表明：当煅烧温度为400℃，煅烧时间为2 h，负载3次，负载时间为6 min制备的TiO2/ACF光催化性能最佳。