三维有序大孔复合材料Ag/TiO_2的制备与不同模式下的光催化性能  

Preparation and Photocatalytic Activities with Different Modes of Three-dimensionally Ordered Macroporous Composite Ag /TiO_2

作　　者：路露[1] 李莉[1,2] 黄贤丹[1] 李召[1] 张秀丽[1] 王丽丽[1] 

机构地区：[1]齐齐哈尔大学材料科学与工程学院,齐齐哈尔161006 [2]黑龙江省高校复合改性材料重点实验室,齐齐哈尔161006

出　　处：《高等学校化学学报》2013年第9期2202-2209,共8页Chemical Journal of Chinese Universities

基　　金：黑龙江省自然科学基金(批准号:B201106);黑龙江省教育厅科学技术研究项目(批准号:12511592);黑龙江省政府博士后资助经费(批准号:LBH-Z11108);黑龙江省研究生创新科研项目(2013年);黑龙江省普通高校绿色化工技术重点实验室开放课题(2013年);国家自然科学基金(批准号:21376126)资助

摘　　要：采用聚苯乙烯(PS)微球和EO20PO70EO20(P123)作为模板剂,通过溶胶-凝胶及煅烧后处理等方法制备了三维有序大孔复合材料Ag/TiO2(3DOM Ag/TiO2).经傅里叶变换红外光谱、X射线衍射、紫外-可见漫反射吸收光谱、X射线光电子能谱、N2吸附-脱附测试和扫描电子显微镜配合X射线能量色散谱等测试手段对其组成、结构及形貌等进行了表征.结果显示,该复合材料的孔结构排列整齐有序,孔壁呈现介孔结构且分布均匀,属于三维有序大孔材料.该3DOM Ag/TiO2具有锐钛矿晶相,其Ag以单质形式存在.与商用光催化剂(Degussa P-25)相比,3DOM Ag/TiO2对光的吸收红移至可见区.考察了3DOM Ag/TiO2在紫外光、可见光以及微波辅助等不同模式下光催化降解有机污染物的性能.结果显示,其活性明显高于P-25和Ag/TiO2,且针对不同类型的有机污染物均表现出较好的光催化性能.Using polystyrene（PS） latex sphere and triblock copolymer surfactant EO20PO70EO20（ P123 ） as templates, three-dimensionally ordered macroporous（3DOM） composite Ag/TiO2 was prepared by the sol-gel method and calcination. The phase compositions, structures and morphologies of 3DOM Ag/TiO2 were well- characterized by Fourier transform infrared （FTIR） spectra, X-ray diffraction （ XRD）, UV-Vis diffuse reflec- tance spectra（UV-Vis/DRS）, X-ray photoelectron spectra（XPS）, N2 adsorption-desorption tests and scan- ning electron microscopy assisted X-ray energy dispersive spectroscopy（SEM-EDS）. The results show that the pore structure of Ag/TiO2 composite is distributed neat and orderly, whose wall is mesoporous, moreover, the composite belongs to three-dimensional ordered macroporous material. The 3DOM Ag/TiO2 has anatase crys- talline structure, in which Ag is metallic Ag~. Compared with Degussa P25, the absorption band of 3DOM Ag/TiO2 is red-shifted ca. 30 nm to the visible region. For photocatalytic degradation of organic pollutants with different modes, including UV, visible light and mircomave-assisted irradiation, better activities than Degussa P25 and Ag/TiO2. In addition, 3DOM Ag/TiO2 exhibits activity in the degradation process of different type organic pollutans. 3DOM Ag/TiO2 shows superior photocatalytic

关 键 词：三维有序大孔材料 Ag TIO2 光催化 有机污染物 

分 类 号：O643.36[理学—物理化学]