Abstract
Surface-modified hydrophilic CZTS nanostructures have been successfully synthesized through hot injection method followed by bi-phase ligand exchange process. The as-synthesized CZTS nanoparticles (NPs) were characterized using the XRD, FTIR, TEM, BET, and UV–visible absorption spectroscopy. The morphology of the NPs has an important effect on the photocatalytic activity. CZTS NPs were synthesized with two different morphologies, i.e., nanospheres and nanoflakes. The photocatalytic degradation results indicate that the CZTS nanoflakes show more effective degradation of hazardous water pollutants, i.e., 98% degradation for methylene blue and 95% for rhodamine B within 80 min under 50-W LED visible light illumination. CZTS nanoflakes yield 60% degradation of industrial textile effluent under 50-W LED illumination. CZTS nanoflakes as catalyst effectively degrades the textile effluent under direct sunlight (average power density = 67 mW/cm2) illumination within 80 min. Further, the photo-degradation mechanism, photostability and recyclability of the catalysts were also analyzed. The results indicate that the hydroxyl and superoxide radicals play an important role in the organic pollutant degradation process.
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Acknowledgements
The authors sincerely thank DRDO (ERIP/ER/201808007/M/01/1740) for funding the research project. One of the authors M. Sai Prasanna, sincerely thank Anna University for providing research fellowship through ACRF scheme.
Funding
This study was funded by defence research and development organisation (ERIP/ER/201808007/M/01/1740).
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Imla Mary, C., Senthilkumar, M., Manobalaji, G. et al. Effect of different nanostructures of Cu2ZnSnS4 on visible light-driven photocatalytic degradation of organic pollutants. J Mater Sci: Mater Electron 33, 894–906 (2022). https://doi.org/10.1007/s10854-021-07359-3
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DOI: https://doi.org/10.1007/s10854-021-07359-3