Controlling morphology and structure of nanocrystalline cadmium sulfide (CdS) by tailoring solvothermal processing parameters |
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Authors: | P Dalvand M R Mohammadi |
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Institution: | (1) Department of Materials Science and Engineering, Sharif University of Technology, Azadi Street, Tehran, Iran; |
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Abstract: | Cadmium sulfide (CdS) with different morphologies was successfully prepared by solvothermal process by controlling the processing
parameters, including nature of precursor and solvent, reaction temperature and process time. X-ray diffraction patterns revealed
that, in all cases highly pure and crystallized CdS with hexagonal structure were obtained. In addition, it was found that
the processing parameters influence on preferable growth direction of CdS nanostructures. Field emission scanning electron
microscope analysis showed that CdS nanowires with different aspect ratios were obtained (depending upon the reaction temperature
and process time) in presence of sulfur powder and ethylenediamine, whereas CdS nanoparticles were produced by sulfur powder
and ethanolamine. Moreover, CdS nanorods were prepared using thiourea and ethylenediamine. Transmission electron microscope
image confirmed that CdS nanowire with one of the highest aspect ratio reported in the literature (i.e., 255) was achieved
using sulfur powder and ethylenediamine at 200 °C reaction temperature for 72 h process time. UV–Vis absorption spectra of
CdS nanostructures prepared under different conditions displayed a blue shift relative to that of bulk CdS due to the quantum
size effect. |
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Keywords: | |
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