CTAB辅助制备ZnO及其光催化脱色性能研究  

Photocatalytic activity of ZnO prepared with the assistance of CTAB

作　　者：卢燕[1] 钟俊波[1] 李建章[1] 曾俊[1] 贺进进[1] 

机构地区：[1]绿色催化四川省高校重点实验室,四川理工学院化学与制药工程学院,四川自贡643000

出　　处：《化学研究与应用》2013年第6期866-870,共5页Chemical Research and Application

基　　金：四川省教育厅基金(09ZZ016)资助项目;四川理工学院博士启动基金(2010XJKRL007)资助项目绿色催化四川省高校重点实验室开放课题(LYJ1102)资助项目

摘　　要：本文采用并流沉淀法在CTAB辅助下制备了纳米ZnO光催化剂(ZnO-CTAB),以甲基橙为模拟有机污染物对催化剂的光催化脱色性能进行了考察。用BET比表面(BET)、X射线粉末衍射(XRD)、紫外可见漫反射光谱(DRS)和表面光电压谱(SPS)对所制备的催化剂进行了表征,结果表明ZnO-CTAB的比表面是ZnO比表面的3倍多,添加CTAB后制备的氧化锌晶粒尺寸更小,ZnO-CTAB局部呈不规则的蜂窝,CTAB辅助制备纳米ZnO有利于光诱导电荷分离。光催化性能测试结果表明ZnO-CTAB催化活性显著提高,ZnO-CTAB催化甲基橙脱色的速率常数ZnO脱色速率常数的3倍。Nano-ZnO was fabricated by a parallel flow precipitation with the assistance of CTAB. The photocatalysts prepared were studied by BET surface area, X-ray diffraction （ XRD）, UV/Vis diffuse reflectance and surface photovohage spectra （StXS） tech- niques. The results show that BET surface area of ZnO-CTAB is three times of that of ZnO ,the absorbance of ZnO-CTAB increases in visible light region, ZnO-CTAB has smaller average crystal size than that of ZnO, ZnO-CTAB is irregular honeycomb partly and adding CTAB into the synthesis system enhances the photoinduced charge separation rate of ZnO. The result illustrates that the ap- parent deeolorization rate constant of methyl orange over ZnO-CTAB is three times of that over the reference ZnO.

关 键 词：氧化锌 CTAB 光催化 甲基橙 

分 类 号：TQ013.1[化学工程]