3DOM TiO2-ZrO2复合材料制备与多模式光催化降解有机污染物

Preparation of Three-Dimensionally Ordered Macroporous Composite ZrO_2-TiO_2 and Its Photocatalytic Degradation of Organic Pollutants under Multiple Modes

采用溶胶-凝胶结合煅烧后处理方法,以聚苯乙烯(PS)胶球和EO20PO70EO20(P123)作为双模板剂制备了三维有序大孔复合材料3DOM Ti O2-Zr O2.通过XRD、UV-Vis/DRS、XPS、SEM以及氮气吸附-脱附等测试手段对其组成、结构与表面形貌进行了表征.同时,研究了3DOM Ti O2-Zr O2在多模式光催化条件下对有机污染物的降解情况.结果表明,3DOM Ti O2-Zr O2复合材料呈现的开放通透、整齐有序的"蜂巢状"大孔结构不仅有利于有机污染物分子的输入与输出,而且其良好的晶型结构与较高的BET比表面积进一步增强了其在紫外光、微波辅助以及模拟日光光催化降解甲基橙中的活性.同时,该复合材料对多种类型结构的有机污染物均显示一定程度的降解.

Using polystyrene（ PS） spheres and EO20PO70EO20（ P123） as dual template agents,three-dimensionally ordered macroporous composite（ 3DOM） TiO2-ZrO2 was prepared through sol-gel method and post-processing calcination. The XRD,UV-Vis / DRS,XPS,SEM and N2adsorption-desorption measurement were employed to characterize the composition,structure and surface morphology of 3DOM TiO2-ZrO2. Meanwhile,the phoyocatalytic degradation of 3DOM TiO2-ZrO2 about organic pollutants under multi-modes was studied. The results showed that,the neat,orderly,open and transparent macroporous structure in 3DOM TiO2-ZrO2 composite presented ‘honeycomb-like＇was in favor of the transmission of organic pollution,moreover,of which the well-defined crystal structure together with higher BET areas could enhance photocatalytic performance in the degradation of methyl orange under UV light,simulated sunlight and microwave-assisted photocatalytic conditions. Moreover,3DOM TiO2-ZrO2 composite also showed a certain degree of degradation effect on the other organic pollutants with different structures.