CdSe纳米粒子负载的TiO_2纳米带复合材料制备及其可见光催化性能  

Preparation of CdSe Nanoparticle-Deposited TiO_2 Nanobelts and Their Visible-Light Photocatalysis

作　　者：周吉[1] 嵇天浩[1] 李丽[1] 孙家跃[1] 

机构地区：[1]北京工商大学化学与环境工程学院,北京100048

出　　处：《光谱学与光谱分析》2011年第5期1398-1402,共5页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展计划(973计划)项目(2006CB932605);北京工商大学高层引进人才项目资助

摘　　要：采用水热法制备了CdSe纳米粒子负载的锐钛矿型TiO2纳米带复合材料,并对产物的晶体结构、形貌尺寸、CdSe负载量及其可见光催化性能进行了测试。结果表明,产物中CdSe纳米粒子以闪锌矿型面心立方结构负载在TiO2纳米带表面,负载量可控;虽然CdSe纳米粒子的负载降低了TiO2纳米带比表面积,但是显著增强了产物可见光吸收率。对罗丹明B的可见光光催化降解活性测试结果表明,若在产物表面CdSe负载量过多或者有大量NH3分子存在,产物光催化活性较低,相反地,若CdSe负载量较低且NH3分子较少,则产物光催化活性有很大提高。A series of CdSe nanoparticle-deposited anatase TiO2 nanobelts were prepared by hydrothermal process.Their crystal structures,morphologies,depositing content of CdSe and visible-light photocatalytic activities were characterized using various measurement techniques.The measurement results show that the CdSe nanoparticles with zinc blende face-center-cubic structure and controlled content have deposited on anatase TiO2 nanobelts;the special surface areas of the products become lower in comparison with that of TiO2 nanobelts due to the deposited CdSe,whereas their visible-light absorptions exhibit much more obviously.The visible-light photocatalytic activities in degradation of rhodamine B solution demonstrate that the products with excess depositing content of CdSe nanoparticles and existence of NH3 molecules on the surface,show much lower photodegradation activities.On the contrary,the products with less CdSe nanoparticles and less NH3 molecules exhibit much higher photodegradation activities.

关 键 词：水热合成 CdSe纳米粒子 TIO2纳米带 光催化 

分 类 号：TB381[一般工业技术—材料科学与工程]