制备方法对Ti_(0.8)Zr_(0.2)O_2/沸石结构及光催化性能的影响  

Influence of Preparation Method on the Structure and Photocatalytic Performance of Ti_(0.8)Zr_(0.2)O_2/Zeolite

作　　者：方林霞[1] 王玲玲[1] 余萌[1] 井强山[1] 

机构地区：[1]信阳师范学院非金属材料研究所,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2012年第4期508-511,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省重点科技攻关项目(122102310041);河南省教育厅科技计划项目(2010A150019);河南省科技计划项目(112300410217)

摘　　要：以酸处理后的信阳上天梯天然斜发沸石作为载体,分别采用浸渍法和溶胶凝胶法制备Ti0.8Zr0.2O2/沸石光催化剂.采用X-射线衍射、红外光谱和扫描电镜分析样品的微观结构和形貌.结果表明,80℃下,4 mol/L盐酸处理10 h后沸石结构发生了显著变化,Al—O—Si骨架结构保持.扫描电镜证明钛锆氧化物在溶胶凝胶法制备的光催化剂上高度分散,以罗丹明B(RhB)为模型污染物考察了该样品的吸附与光催化效果.300 W紫外灯光照1.5 h后,0.2 g该催化剂可使20 mL浓度为80 mg/L RhB溶液的去除率达97.12%,重复使用8次后去除率为89.47%.Ti0.8Zr0.2O2/zeolite photocatalysts were prepared by impregnation and sol-gel methods,the natural clinoptilolite from Xinyang was employed as substrate after dealuminating with hydrochloric acid.Morphology and structure of samples were characterized by X-ray diffraction（XRD）,infrared spectroscopy and scanning electron microscope（SEM） techniques.The results show that remarkable change in structure of natural zeolite is observed after treated with 4 mol/L HCl at 80 ℃ for 10 h,the framework of Al—O—Si remain unchanged.SEM images indicate that the composite TiZr oxide is highly dispersed in the catalyst prepared by sol-gel method.Performance of adsorption and photocatalysis was evaluated by employing rhodamine B（RhB） as a model of pollutant.97.12 % of 20 mL RhB（80 mg/L） was removed over 0.2 g Ti0.8Zr0.2O2/zeolite under 300 W UV light irradiation for 1.5 h.89.47 % of RhB could be removed after recycling 8 times.

关 键 词：二氧化钛 锆掺杂 天然沸石 罗丹明B 光催化 

分 类 号：X781.1[环境科学与工程—环境工程]