水热法制备ZnTiO_3/TiO_2复合光催化剂及其光催化性能研究  

The synthesis of ZnTiO_3/TiO_2 composite photocatalysts and their photocatalytic performances

作　　者：刘冷[1] 杜意恩 李军[1] 刘毓芳[1] 蔡雪梅[1] 陈勇强[1] LIU Leng;DUYi-En;LI Jun;LIUYu-Fang;CAI Xue-Mei;CHNE Yong-Qiang(School of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China)

机构地区：[1]晋中学院化学化工学院,晋中030619

出　　处：《四川大学学报（自然科学版）》2018年第4期827-832,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：晋中学院博士科研项目;晋中学院"131工程"创新团队建设计划;山西高校科技研究开发项目(20121026)

摘　　要：本文以层状钛酸盐K_2Ti_4O_9为前驱体,将其通过质子交换和插层反应剥离成[Ti4O9]2-纳米片,然后用3mol/L的HCl溶液和3mol/L的NaOH溶液将其调节成设定的pH,再往上述溶液中加入一定质量的六次甲基四胺和锌盐,在水热条件下制备出高催化活性的ZnTiO3/TiO2复合光催化剂.通过X-射线粉末衍射仪(XRD)和扫描电镜(SEM)表征了其结构和形貌,并在光照条件下,对不同条件下所制备的ZnTiO3/TiO2复合光催化剂进行了光催化降解亚甲基蓝性能研究.研究结果表明,在pH=7.0条件下制备的ZnTiO_3/TiO_2复合光催化剂展示出了较高的光催化性能.The ZnTiO3/TiO2 composite photocatalysts with high photocatalytic activity were synthesized by hydrothermal treatment of the [Ti4O9]^2ˉ nanosheets after it was adjusted to a desired pH value with a 3 mol/L HCl solution and a 3 mol/L NaOH solution in the present of hexamethylenetetramine and Zn（NO3）2. The [Ti4O9]^2ˉ nanosheets were prepared by using the layered tetratitanate K2Ti4O9 as the processor. First, the K2Ti4O9 sample was converted into a protonic tetratitanate H2Ti4O9 by exchanging K＋ of K2Ti4O9. And then the H2Ti4O9 was mixed with the triethanolamine （TEAOH） to obtain the TEA＋-intercalated tetratitanate compound. Finally, the TEA＋-intercalated tetratitanate compound was dispersed in massive amounts of distilled water to obtain the [Ti4O9]^2ˉ nanosheets. The structures and morphologies of the ZnTiO3/TiO2 composite photocatalysts were investigated by using X-ray diffraction （XRD） and scanning electron diffraction microscopy （SEM）. Furthermore, the photocatalytic activities of the synthesized ZnTiO3/TiO2 composite photocatalysts were also characterized. The experimental results revealed that the ZnTiO3/TiO2 composite photocatalyst obtained at the value of pH = 7.0 exhibits the higher photocatalytic activity.

关 键 词：二氧化钛 催化性能 亚甲基蓝 降解率 

分 类 号：O657.32[理学—分析化学]