Abstract
Herein, cadmium sulfide (CdS) nanoparticles (NPs) and different concentrations (1–5 and 10 wt %) of Sn-doped CdS NPs were prepared by a chemical precipitation method using PVP as a capping agent. The synthesized NPs were characterized using various characteristic techniques such as XRD, SEM, TEM, Raman spectroscopy, UV-Vis, and photoluminescence to investigate structural, morphological, and optical properties. Optical band gap of CdS has been tuned by substitution of Sn with different concentrations. Pure CdS and Sn-doped CdS NPs were used for the photocatalytic degradation of methylene blue (MB) dye under direct sunlight irradiation. The photocatalytic activity of the Sn-doped CdS NPs is attributed to the interface actions between Sn and CdS, which significantly decreases the recombination of a photogenerated electron-hole pair. The degradation efficiencies were found to be 91.39% and 97.56% within 180 min for pure CdS and Sn-doped CdS NPs, respectively. Among the catalysts, 4% Sn-doped CdS NPs exhibit best photocatalytic degradation efficiency after 180 min of irradiation.
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Acknowledgments
We thank the CSIR-CECRI, DST-SERI (DST/TM/SERI/FR/172(G)) UGC-SAP—New Delhi for the instrumentation facilities, SERI/FR/172 (G), RUSA 2.0-BEIC for research grant and the Department of Nanoscience and Technology, Bharathiar University.
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Venkatesh, N., Sabarish, K., Murugadoss, G. et al. Visible light–driven photocatalytic dye degradation under natural sunlight using Sn-doped CdS nanoparticles. Environ Sci Pollut Res 27, 43212–43222 (2020). https://doi.org/10.1007/s11356-020-10268-3
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DOI: https://doi.org/10.1007/s11356-020-10268-3