物理化学学报2008，Vol.24Issue(7)：1219-1224,6.
簇形和花形CdS纳米结构的自组装及光催化性能
Self-Assembly and Photocatalytic Properties of Clustered and Flowerlike CdS Nanostructures
摘要
Abstract
Clustered and flowerlike CdS nanosUuctures were synthesized via the controllable solvent thermal method using ethylenediamine as the structure-directing template.The phase structures and morphologies were measured by X-ray diffraction(XRD)and scanning electron microscopy(SEM).XRD patterns demonstrated that the CdS nanorod cluster samplewas hexagonal cell and the flowerlike CdS nanostructurc was cubiccell.Experimental results showed that the whole self-assembly process was made-up of nucleation and growth,which was due to the competition in the nucleation.And the template function of ethylenediamine played an important role in the self-assembly.The self-assembly mechanisms of forming the clustered and flowerlike nanostructures were investigated on the basis of the time-and temperature-dependent experiments and were briefly discussed.At room temperature,photoluminescence (PL)spectrum experiments revealed that CdS nanostructures had two visible emission peaks respectively at the wavelengths of 433 nnl and nearly 565 nm,which should arise respectively from the excitonic emission and surfacedefect.The specific surface areas were characterized by the Brunaue-Emmett-Teller(BET)method.The photocatalysis of clustered and flower like CdS nanostructures in methyl orange(MeO)under high-pressure mercury lamp illumination was investigated.The experimental results indicated that the performance of photocatalytic system employing flower like CdS nanostructure,with higher specific surface area,was observed to be better than other CdS materials.关键词
硫化镉/纳米棒簇/花形纳米结构/自组装/光催化Key words
CdS/Nanorod clusters/Flowerlike nanostructurcs/Self-assembly/Photocatalysis分类
化学化工引用本文复制引用
许迪,高爱梅,邓文礼..簇形和花形CdS纳米结构的自组装及光催化性能[J].物理化学学报,2008,24(7):1219-1224,6.基金项目
国家自然科学基金(20643001)、广东省科技计划项(20061311801002)和广州市重点科技攻关项目(2006Z3-D2021)资助 （20643001）
