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Acta Phys. -Chim. Sin.  2008, Vol. 24 Issue (07): 1219-1224    DOI: 10.3866/PKU.WHXB20080717
Article     
Self-Assembly and Photocatalytic Properties of Clustered and Flowerlike CdS Nanostructures
XU Di; GAO Ai-Mei; DENG Wen-Li
College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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Abstract  Clustered and flowerlike CdS nanostructures 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). XRDpatterns demonstrated that the CdS nanorod cluster sample was hexagonal cell and the flowerlike CdS nanostructure was cubic cell. 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 nm and nearly 565 nm, which should arise respectively from the excitonic emission and surface-defect. The specific surface areas were characterized by the Brunauer-Emmett-Teller (BET) method. The photocatalysis of clustered and flowerlike 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 flowerlike CdS nanostructure, with higher specific surface area, was observed to be better than other CdS materials.


Key wordsCdS      Nanorod clusters      Flowerlike nanostructures      Self-assembly      Photocatalysis     
Received: 10 January 2008      Published: 28 May 2008
MSC2000:  O649  
  O643  
Corresponding Authors: DENG Wen-Li     E-mail: wldeng@scut.edu.cn
Cite this article:

XU Di; GAO Ai-Mei; DENG Wen-Li. Self-Assembly and Photocatalytic Properties of Clustered and Flowerlike CdS Nanostructures. Acta Phys. -Chim. Sin., 2008, 24(07): 1219-1224.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20080717     OR     http://www.whxb.pku.edu.cn/Y2008/V24/I07/1219

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