Abstract
We report fabrication of stable ZnS nanoparticles (NPs) using a green chemistry concept with watermelon rind extract as capping and stabilizing agent. The cubic structure of the NPs was evidenced by X-ray powder diffraction analysis and electron diffraction studies. Dynamic light scattering and high-resolution transmission electron microscopy studies revealed that the average size of the ZnS NPs was <12 nm. The bandgap of the ZnS nanocrystals was found to be 3.42 eV using ultraviolet–visible (UV–Vis) spectroscopy studies. The energy-dispersive X-ray spectrum of the fabricated ZnS NPs confirmed the elemental Zn and S signals without peaks from any impurities. The biomolecular capping of the ZnS NPs was analyzed using Fourier-transform infrared spectroscopy. An illustrative stabilization mechanism for the ZnS NPs is given using citrulline, a major phytochemical in watermelon rind extract. The obtained ZnS NPs showed good photocatalytic activity towards methylene blue dye degradation.
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R.L. greatly acknowledges the help of VIT University, Vellore 632014, India for the platform provided to do this research. M.K.K. and S.G. are grateful for postdoctoral scholarships from Dirección General de Asuntos del Personal Académico - Universidad Nacional Autónoma de México (DGAPA-UNAM).
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Lakshmipathy, R., Kesarla, M.K., Nimmala, A.R. et al. ZnS nanoparticles capped with watermelon rind extract and their potential application in dye degradation. Res Chem Intermed 43, 1329–1339 (2017). https://doi.org/10.1007/s11164-016-2700-y
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DOI: https://doi.org/10.1007/s11164-016-2700-y