CTAB作用下纳米复合材料ZnO-TiO_2制备与多模式光催化降解罗丹明B  

The Preparation of Nanocomposite ZnO-TiO_2 by CTAB-assisted and Photocatalytic Degradation Rhodamine B with Multiple Modes

作　　者：张文治[1,2] 张秀丽[2] 李莉[2] 李楠楠[2] 王宝辉[1] 

机构地区：[1]东北石油大学化学化工学院化学工程与技术博士后流动站,黑龙江大庆163318 [2]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《分子催化》2013年第5期474-482,共9页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金资助项目(No.21376126);黑龙江省自然科学基金资助项目(No.B201106和B200907);黑龙江省教育厅科学技术项目(No.12511592和11551532);黑龙江省政府博士后资助经费(LBH-Z11108和LBH-Z10234);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)

摘　　要：在模板剂十六烷基三甲基溴化铵作用下,通过溶胶-凝胶与程序升温溶剂热法制备了纳米复合材料ZnOTiO2(CTAB).经X-射线衍射(XRD)、紫外-可见漫反射吸收光谱(UV-Vis/DRS)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和N2吸附-脱附测试等手段对其组成、结构和形貌等进行了表征.结果显示,合成产物ZnO-TiO2(CTAB)主要晶型为ZnO纤锌矿,并部分生成ZnTiO3.同时,该合成产物经CTAB作用后,其对光的吸收发生明显红移,且平均孔径明显变小,BET值增大.在紫外光、可见光、模拟日光和微波辅助等不同模式光催化降解罗丹明B的实验研究中,与未经CTAB作用的样品ZnO-TiO2相比,ZnO-TiO2(CTAB)具有更高的光催化性能.同时,该复合材料在紫外光条件下,对甲基橙、罗丹明B、结晶紫、亚甲基蓝和龙胆紫5种不同结构染料的光催化中均表现出良好的降解效果.The nano-composite ZnO-TiO2 under cetyhrimethyl ammonium bromide（CTAB） was prepared by the sol- gel method combined with temperature-programmed hydrothermal treatment. The phase composition, structure and morphology of the nano-composite ZnO-TiO2 （CTAB） were well-characterized by X-ray diffraction（ XRD）, diffuse reflectance （ UV-Vis/DRS ）, X-ray photoelectron spectroscopy （ XPS ）, Scanning electron microscopy （ SEM ）, Transmission electron microscopy （TEM） and N2 adsorption-desorption measurement. Results showed that the syn- thesized product ZnO-TiO2（CTAB） had mainly the ZnO wurtzite and part ZnTiO3 generated. Meanwhile, the ab- sorption band of as-product ZnO-TiO2 （CTAB） was obviously red shifted with CTAB effect, and the average pore size of ZnO-TiO2 （CTAB） was obviously reduced, moreover, its BET was increased. Compared with ZnO-TiO2 without CTAB, the nano-composite ZnO-TiO2 （CTAB） had better photocatalytic properties in the different modes in- cluding ultraviolet, visible light, simulated sunlight and microwave-assisted photocatalytic degradation of Rhoda- mine B. In addition, the nano-composite ZnO-TiO2 （CTAB） showed good degradation for five different structure dyes including methyl orange, Rhodamine B, Crystal violet, Gentian violet and Methylene blue under UV light irra- diation.

关 键 词：溶胶-凝胶 程序升温溶剂热 CTAB ZnO—TiO2 光催化 染料 

分 类 号：O643.32[理学—物理化学]