Abstract
Graphene-based nanocomposites are developing as a new class of materials with several uses. The varied weight percentages of rGO on Ag2S catalysts were synthesized using a simple hydrothermal process and employed for the decomposition of anionic dye naphthol green B (NGB) under solar light. The reduced graphene oxide-based silver sulfide (rGO/Ag2S) nanoparticles were then examined using XRD, SEM, EDS, HR-TEM, XPS, UV-DRS, and PL analysis. Using solar light, the photocatalytic activity of the produced catalyst was examined for the degradation of naphthol green B (NGB) in an aqueous solution. At pH 9, rGO/Ag2S is discovered to be more effective than the other catalysts for the NGB dye mineralization. Analyses have been conducted on the influence of operational parameters on the photo-mineralization of NGB, including the initial pH, initial dye concentration, and catalyst dosage. The dye concentration increased; the efficiency of photocatalytic degradation tended to decrease. Chemical oxygen demand (COD) studies have verified the NGB dye mineralization. Active species trapping revealed that holes, hydroxyl radicals, and superoxide radicals all played major roles in the photocatalytic deterioration of NGB processes. Additionally, a potential mechanism of NGB dye degradation by rGO/Ag2S catalyst is presented. The synthesized compound was further evaluated for antibacterial activity, and the results indicated that rGO/Ag2S were potentially effective antibacterial agents.
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The datasets used or analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
The authors express their sincere appreciation to the Researchers Supporting Project Number (RSP2024R398) King Saud University, Riyadh, Saudi Arabia. One of the authors M. Shanthi is thankful to Dr. M. Swaminathan, Emeritus Professor (CSIR), Nanomaterials Laboratory, Department of Chemistry, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, India.
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BSP was contributed to conceptualization, methodology, formal analysis, investigation, writing—original draft. SK was contributed to software, data curation, validation. JKA was contributed to writing—review, formal analysis. SD was contributed to resources, formal analysis. AV was contributed to formal analysis. ML was contributed to data duration, and writing—review. MS was contributed to conceptualization, supervision, writing—review and editing.
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Priya, B.S., Kumaravel, S., Alagarasan, J.K. et al. Solar-activated and hydrothermally synthesized effective rGO/Ag2S composites for the destruction of naphthol green B dye and antibacterial applications. Environ Geochem Health 46, 95 (2024). https://doi.org/10.1007/s10653-024-01876-w
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DOI: https://doi.org/10.1007/s10653-024-01876-w