Pulsed Current Electrochemical Synthesis of Cadmium Sulfide Nanofibers

摘要

This work describes electrosynthesis of cadmium sulfide. A cadmium sulfide/cadmium nanocompositein nanofibers form was synthesized by using, cadmium chloride (0.2 M), sodium thiosulfate (0.02 M)as precursor by the pulsed current of 100 mA cm-2 with a frequency of 8 Hz at solution temperature of50C. Cd content of the samples can be decreased by using of higher synthesis temperature. A purenanostructured cadmium sulfide can be synthesized at temperature of 150C. The morphology andparticle size of each synthesized sample were studied by SEM, TEM and XRD. The cadmium sulfidenanopowder synthesized in the optimum conditions has excellent uniform nanofibers with a diameterrange of 80 to 100 nm (average diameter of 90 nm) and length of 5m to 7 m. The obtained resultsindicate that the pulsed current electrochemical method can be used as a confident and controllablemethod for the preparation of cadmium sulfide nanofibers. Based on XRD studies, the samples werecontaminated with cadmium impurity, which impurity was decreased by increasing of synthesistemperature. At solution temperature of 150C (in electrohydrothermal bomb), cadmium sulfide wassynthesized without any impurity of metallic cadmium.