反蛋白石结构TiO2的制备与性能

Preparation and properties of inverse opal of TiO2

以聚苯乙烯光子晶体为模板,结合Pechini溶胶-凝胶法制备反蛋白石结构TiO2光催化材料.采用XRD和SEM分别对所得材料的晶相和形貌进行表征,研究了样品对罗丹明B的光催化降解性能,探讨了反蛋白石结构TiO2光催化剂的光催化反应机理.结果表明,当硫酸钛、柠檬酸的用量分别为1g、1.75g时,所得反蛋白石结构TiO2的周期性排列的有序性最强,有序反蛋白石结构TiO2的高比表面、慢光子、光子局域等特性有效增强了光催化性能.

The inverse opal TiO2 was prepared by Pechini sol-gel method using polystyrene photonic crystal as temples.The crystal phases and morphologies of samples were characterized by XRD and SEM respectively,and its photocatalytic degradation process of Rh B with the samples were also studied.And the photocatalytic mechanism of the inverse opal TiO2 was discussed.The results show that when the dosages of titanium sulfate and citric acid are 1 g and 1.75 g respectively,the prepared TiO2 powders have ordered periodic structure and significantly enhance the degradation of Rh B by virtue of high specific surface area,slow photon and photon localization effects and so on.