کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6454570 | 1418817 | 2017 | 15 صفحه PDF | دانلود رایگان |
- Morphology and structure of CdS depend on the solvent used.
- Coordination of solvents with Cd2+ and its dielectric constant control CdS growth.
- Differences in photoactivity with the morphology and structure of CdS.
CdS crystals with different morphologies, nanorods, sheets, microspheres and irregular particles have been obtained by changing the solvothermal solvent (ethylenediamine, diethylenetriamine, triethanolamine and ethanol). Characteristics of the solvothermal solvents, such as dielectric constant, ion-coordination and length of an atomic chain, have influence on the nucleation and growth of CdS crystals. The differences in the morphological and structural characteristics of the CdS crystals have strong influence on their photophysical properties as well as in their photoactivity for hydrogen production under visible light from aqueous solutions containing Na2SO3 and Na2S as sacrificial electron donor agents. The hydrogen production rate on CdS samples decreases in the order: nanorods (ethylenediamine)Â >Â sheets (diethylenetriamine)Â >Â irregular particles (triethanolamine)Â >> microspheres (ethanol). Variations in photoactivity were analysed taking into account the changes in the morphology, structure, surface and light absorption ability of CdS crystals.
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Journal: Applied Catalysis B: Environmental - Volume 203, April 2017, Pages 753-767