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Citation: WANG Shi-ming, LIU Ping, FU Xian-zhi. Preparation and Optical Properties of Nanocrystalline Cadmium Sulfide in Perfluorinated Ionomer Membrane[J]. Acta Physico-Chimica Sinica, ;2005, 21(10): 1151-1155. doi: 10.3866/PKU.WHXB20051018 shu

Preparation and Optical Properties of Nanocrystalline Cadmium Sulfide in Perfluorinated Ionomer Membrane

1.
Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002

Received Date: 27 April 2005
Available Online: 15 October 2005

Using thioacetamide (TAA) as precursor, homogeneous and steady monodispersed CdS nanocrystals were synthesized in Perfluorinated Ionomer Membranes (Nafion) by self-assembly. Unlike the ionic precursors such as Na₂S and H₂S, TAA could diffuse into the cationic- exchangeable ionomer membranes much more uniformly, which led to the homogeneous distribution of CdS nanoparticles in the Nafion membranes. High resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDXA) were used to investigate the synthesis mechanism, the size distribution and the microstructure of these CdS nanoparticles embedded in Nafion membranes. Optical properties of CdS nanoparticles in Nafion were also characterized by UV-Vis absorption and luminescence spectra. The results show that the quantum size effect becomes strong with the decrease of the size of CdS nanocrystals. Blue shift appears both on the absorb edges in the absorption spectra and on the band- edge emission in the luminescence spectrum.
- CdS;Nafion membrane;Nanocrystal;Optical property;Synthesis
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