介孔结构Na_4W_(10)O_(32)/TiO_2复合光催化剂的制备及其可见光光催化性能的研究  

Mesoporous Na_4W_(10)O_(32)/TiO_2 composite photocatalyst:preparation and visible-light photocatalytic activity

作　　者：耿爱芳[1] 王长华[2] 姜淑娟[2] 郭伊荇[2] 

机构地区：[1]长春理工大学材料与化工学院,吉林长春130022 [2]东北师范大学化学学院,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2006年第4期77-80,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20071007)

摘　　要：用溶胶-凝胶和程序升温水热法制备了介孔结构的Na4W10O32/TiO2多酸纳米晶复合光催化剂.用ICP-AES、XRD、拉曼散射光谱、TEM和N2吸附测定等技术对其组成和结构进行了表征.考察了催化剂的可见光光催化性能.结果表明:Na4W10O32均匀地分散在TiO2网络内部,而且其基本骨架结构未发生改变;该催化剂比锐钛矿TiO2,H6P2W18O62/TiO2和H4SiW12O40/TiO2具有更高的可见光光催化活性.The anatase phase, nanosized Na4W10O32/TiO2 composite, was prepared by a sol-gel technique coupled with programmed temperature hydrothermal treatment. The composite was characterized by ICPAES,XRD, Raman scattering studies, TEM, and nitrogen adsorption/desorption determination, indicating that the primary Na4W10O32 structure remained intact after immobilizing photoreactive decatungstate inside the titania network, and the composite exhibited mesoporosity. Na4W10O32/TiO2 showed visible-light photocatalytic activity to polyacrylamide （PAM） degradation, attributed to synergistic effect resulting from the combination of the two photoactive materials and its porous structure.

关 键 词：溶胶-凝胶法 纳米材料 多金属氧酸盐 锐钛矿 协同作用 可见光光催化 

分 类 号：O611[理学—无机化学]