TiO_2/Nd_2Zr_2O_7复合物的合成及催化性能(英文)  

Synthesis and Catalytic Peoperties of TiO_2/Nd_2Zr_2O_7 Nanocomposites

作　　者：仝玉萍[1] 钱晓军[1] 赵文轩[1] 陆路德[2] 

机构地区：[1]华北水利水电学院土木与交通学院 [2]南京理工大学功能材料与软化学教育部重点实验室

出　　处：《硅酸盐学报》2013年第1期34-37,共4页Journal of The Chinese Ceramic Society

基　　金：河南省科技攻关项目(122102210239);郑州市科技领军人才项目(096SYJH23105);河南省教育厅基础研究项目(2010B4-30018);河南省青年骨干教师基金资助计划(2012GGJS–103)

摘　　要：通过溶胶-凝胶法成功合成了TiO2/Nd2Zr2O7复合氧化物。采用X射线衍射、透射电子显微镜、扫描电子显微镜对材料进行了表征,并对其比表面积进行了测试。结果表明:TiO2均匀地包覆在了Nd2Zr2O7颗粒的表面,其包覆量为50.36%(质量分数);TiO2/Nd2Zr2O7复合物的BET比表面积为25.62m2/g,比Nd2Zr2O7纳米晶的表面积3.48m2/g大得多。通过降解甲基橙评价产物的光催化活性,证实TiO2/Nd2Zr2O7复合物具有好的光催化活性。通过Nd2Zr2O7,TiO2和TiO2/Nd2Zr2O7在20min内降解甲基橙的降解量分别为20.1%,70.7%和88.2%。TiO2/Nd2Zr2O7 composites were synthesized by a sol-gel method. The composites were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, energy dispersive X-ray spec- trometer （EDS） and Brunauer-Emmett-Teller （BET） nitrogen adsorption, respectively. The results show that TiO2 is uniformly coated on the surface of Nd2Zr2O7 particles, and the coated amount is 50.36 wt.%. The specific surface area of TiO2/Nd2Zr2O7 composites was 25.62 m2/g, which was greater than that of Nd2Zr2O7 nanocrystals （3.48 m2/g）. These results could favor the catalytic activity of the composites. The photocatalytic property was evaluated via the photodegradation of methyl orange. It was indicated that TiO2/Nd2Zr2O7 composites had a superior photocatalytic activity. The photodecomposition amounts of methyl orange catalyzed by Nd2Zr2O7, TiO2 and TiO2/Nd2Zr2O7for 20 min were 20.1%, 70.7% and 88.2%, respectively.

关 键 词：溶胶-凝胶法 氧化钛 锆酸钕复合物 催化性能 

分 类 号：TB332[一般工业技术—材料科学与工程]