Abstract
Three-atom-thick two-dimensional layered transition metal dichalcogenides (TMDs) has shown appreciable capabilities as materials candidate for photocatalytic applications. In particular, atomically-thin tungsten disulfide (WS2) has shown attractive interest towards visible-light photocatalytic activity. In this work, we show that the atomically-thin WS2 films can be used as an effective photocatalyst with Methylene Blue (MB) as a model pollutant, under visible light irradiation. Further, we demonstrate that these WS2 thin film samples can be recovered effortlessly without losing its chemical and structural stability. The bi-layered WS2 films yielded a degradation efficiency of ~94% for MB dye. Recovery and reusability of the WS2 thin films were demonstrated without significant loss in the degradation-efficiency even after 4-cycles of degradation. This study may pave the way for the large-scale degradation and recycling of various effluents using recoverable thin-film photocatalysts.
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Acknowledgements
We are grateful to Science and Engineering Research Board (SERB), Department of Science and Technology, India for the financial support (Grant No. ECR/2016/000918 & CRG/2023/2938). We sincerely acknowledge SRMIST for the seed grant and startup grant for the establishment of MicroRaman spectrometer and UV-Vis-NIR spectrometer. We acknowledge Nanotechnology Research Center for providing support of characterization facilities.
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Funding was supported by Science and Engineering Research Board, No: ECR/2016/000918, CRG/2023/2938.
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ASS, KM, SH, MN and SKE have conceived and designed the research work. ASS and KM have contributed to the implementation of the idea. All the authors have contributed to data analysis and writing of the manuscript.
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Sindhu, A.S., Meganathan, K., Harish, S. et al. Seamless recovery and reusable photocatalytic activity of CVD grown atomically-thin WS2 films. J Mater Sci: Mater Electron 35, 877 (2024). https://doi.org/10.1007/s10854-024-12615-3
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DOI: https://doi.org/10.1007/s10854-024-12615-3