二维六方p6mm有序介孔WO_3-TiO_2复合材料的制备及其可见光光催化性能  

Preparation of 2D Hexagonal p6mm Ordered Mesoporous WO_3-TiO_2 Composite Materials and Their Visible-Light Photocatalytic Activity

作　　者：黄燕[1] 李可心[1] 颜流水[1] 戴玉华[1] 黄智敏[1] 薛昆鹏[1] 郭会琴[1] 熊晶晶[1] 

机构地区：[1]南昌航空大学环境与化学工程学院,生态诊断修复与污染阻断技术省级重点实验室,江西南昌330063

出　　处：《催化学报》2012年第2期308-316,共9页

基　　金：国家自然科学基金(20765003,21165013);江西省自然科学基金(2010GZH0112);江西省科技支撑计划(2010BSB03100);南昌航空大学博士启动基金(EA201002219)~~

摘　　要：以非离子型表面活性剂为模板剂,采用蒸发诱导自组装法制备了一系列不同WO3含量的有序介孔WO3-TiO2复合材料,并表征了其孔结构、形貌、孔隙率、光谱性质及组成.结果表明,该材料呈二维六方p6mm对称和锐钛矿晶相结构;与无序WO3-TiO2复合材料相比,其比表面积(152～154m2/g)更大,孔径更均一(5.3nm),且比纯TiO2的帯隙宽度(3.0eV)更窄.将该WO3-TiO2样品用于可见光光催化降解水相中罗丹明B和2,4-二氯苯氧乙酸的反应中,发现WO3含量适当的有序介孔WO3-TiO2样品的光催化活性比无序的样品和纯TiO2的更高.A series of ordered mesoporous WO3-TiO2 composite materials with different WO3 loadings were prepared by using a single step nonionic-surfactant-templating combined with evaporation-induced self-assembly（EISA） technique.The mesostructure,morphology,porosity,optical property,and composition of as-prepared materials were characterized.The characterization results confirmed that the ordered composite materials exhibited 2D hexagonal p6mm symmetry and anatase phase structure with larger BET surface area（152-154 m2/g） and more uniform pore size（5.3 nm） compared with the disordered WO3-TiO2 composite material as well as narrow bandgap（3.0 eV） with respect to pure TiO2.Subsequently,the ordered mesoporous composite materials were successfully applied to the degradation of rhodamine B and 2,4-dichlorophenoxy acetic acid in the liquid phase under visible-light（？ ？ 400 nm） irradiation,and enhanced photocatalytic activity compared with the disordered WO3-TiO2 composite material and pure TiO2 was obtained for the samples with suitable WO3 loadings.

关 键 词：三氧化钨 二氧化钛 有序介孔材料 光催化 罗丹明B 2 4-二氯苯氧乙酸 

分 类 号：O643.36[理学—物理化学]