Self-Assembly and Photocatalytic Properties of Clustered and Flowerlike CdS Nanostructures
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.
Keywords: CdS; Flowerlike nanostructures; Nanorod clusters; Photocatalysis; Self-assembly
Document Type: Research Article
Publication date: 15 July 2008
- Acta Physico-Chimica Sinica, founded in 1985, is sponsored by the Chinese Chemical Society and organized by the College of Chemistry and Molecular Engineering, PekingUniversity. Since 1997, Acta Physico-Chimica Sinica has been indexed in SCI of ISI (US). Acta Physico-Chimica Sinica is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and material physical chemists. Manuscripts that are essentially reporting data, applications of data, or reviews of the literature are not suitable for publication in Acta Physico-Chimica Sinica.
- Editorial Board
- Information for Authors
- Submit a Paper
- Ingenta Connect is not responsible for the content or availability of external websites
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content