CdS/TiO_2复合纳米粒子的光学性质  

Optic Property of CdS/TiO_2 Composite Nanoparticle Prepared in the Reversed Microemulsion

作　　者：王斌[1] 高飞[1] 何斌[1] 张冬柏[1] 程虎民[1] 马季铭[1] 齐利民[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《物理化学学报》2003年第1期21-24,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20003001)资助项目~

摘　　要：在Brij35/正己醇/环己烷/水构成的反相微乳体系中,分别合成了CdS、TiO2纳米粒子和TiO2包覆CdS(CdS/TiO2)的复合纳米粒子.测定了它们的紫外-可见吸收和荧光光谱.结果表明,CdS/TiO2复合纳米粒子在可见光区的吸收比相应的两组分的吸收之和更强.纳米CdS和纳米TiO2均有较强的荧光.而且在相同浓度时纳米TiO2的荧光比纳米CdS的荧光更强.但在CdS/TiO2复合纳米粒子中,TiO2的荧光被淬灭,而CdS的荧光稍有降低.Nanoparticles of CdS, TiO2 and CdS coated with TiO2 (CdS/TiO2) are prepared respectively in reversed microemulsion which is made up of Brij35/n-hexanol/cyclohexane/water. The absorption of CdS/TiO2 composite nanoparticle in the range of visible light is stronger than the sum of CdS and TiO2. Both of the particles of CdS and TiO2 show the obvious fluorescence spectrum, which of TiO2 is much stronger than that of CdS when they are in the same concentration. However, the fluorescence of TiO2 is quenched and that of CdS decreases slightly in the CdS/TiO2 composite nanoparticle.

关 键 词：光学性质 反相微乳 CDS TIO2 荧光 复合纳米粒子 硫化镉 二氧化钛 半导体 光催化剂 

分 类 号：TB383[一般工业技术—材料科学与工程]