Zno／TiO2复合材料的制备及其光学特性.pdf

ZnO/TiO复合材料的制备及其光学特性/涂盛辉等·13· Zno/Tio2复合材料的制备及其光学特性涂盛辉,梁海营,朱细平,杜军,万金保(南昌大学环境与化学工程学院,南昌330O31) 摘要采用水热法在锌片上制备出棒状ZnO,将TiOz溶胶旋涂在棒状ZnO上得到ZnO/TiOz新型复合材料。利用扫描电子显微镜(SEM)、X射线衍射仪(Ⅺ)及uv_Vis漫反射(DRS)等研究样品的微观形貌、晶型结构、光学特性。研究表明:375℃焙烧后,Ti02附着在ZnO纳米棒表层,随着溶胶旋涂层数的增加,其形貌呈现出多维花状结构。通过光催化降解甲基橙模拟废水考察其光催化性能,实验结果表明,ZnO/Ti02复合半导体的多维结构使其对紫外一可见光吸收增强,对甲基橙模拟废水(20mg/L),具有优异的光催化性能。关键词水热法模拟废水光催化中图分类号:TB34 文献标识码:A PreparationandOpticalPropertiesofZnO/posites TUShenghui,LIANGHaiying,ZHUXiping,DUJun,WANJinbao (SchoolofEnvironment8LChemicalEngineering,NanchangUniversity,Nanchang330031) Abstract Rod-likeZnOwaspreparedonzinctabletsbythehydrothermalmethod,Ti02solwasspin-coatedon therod-likeZnOtogetZnO/,XRDandUv_ Vistorevealthemicromorphology,crystalstructuresandopticalpropertiesofZnO/ wereadheredtothesuHaceofZn0nanorodsat375℃.WiththeincreaseinthenumberofSO1spincoating。themor— phologyshowingamulti—dimensionalflower- photocatalystswerecarriedouttoinvestigatethephotocatalyticactivityofZnO/— ofmethylorangesolution(20mg/L) whichshowsthatthesampleshaveperfectphotocatalyticproper— ties. Keywords hydrothermalmethod,simulatedwastewater,photocatalysis 由于半导体材料具有良好的光催化性,一直受