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<p>In order to separate organic contaminants from wastewater and store energy, it is crucial to develop better and more stable catalyst and electrode materials. Because of their special electrical and physical characteristics, heterojunctions have drawn a lot of interest in catalytic, energy storage, and environmental applications. In this study, a molybdenum disulfide-tin disulfide@reduced graphene oxide (MSS@rGO) nanocomposite was prepared using a simple one-pot hydrothermal technique. The physicochemical properties of the nanocomposite were investigated through XRD, UV–Vis DRS, XPS, and TEM analysis, which confirmed the formation of the MSS@rGO nanocomposites. Additionally, the absorption characteristics, photocatalytic activity, and notable stability of the catalysts were evaluated against methylene blue (MB). The degradation efficiency of the synthesized catalysts was assessed, with MSS@rGO-40 demonstrating significant performance at 89% within 150&#xa0;min, compared to MSS (45%), MSS@rGO-20 (76.6%), and MSS@rGO-60 (85%). The enhanced photocatalytic efficiency of the MSS@rGO-40 photocatalyst is attributed to superior electron–hole pair separation and the formation of the heterojunction structure. Furthermore, the recyclability of the MSS@rGO-40 nanocomposite catalysts was tested over four consecutive cycles, and the MSS@rGO-40 nanocomposite showed excellent stability after these cycles. At a current density of 1 A/g, the MSS@rGO-40 nanocomposite had a high specific capacitance of 154.1 F/g. Additionally, it showed outstanding long-term cycling stability, maintaining capacitance retention at over 98.6% and coulombic efficiency over 99.4% after 5000 charge–discharge cycles 5000.</p>

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Fabrication of MoS2-SnS2@rGO Nanocomposites as Bifunctional Catalysts for Methylene blue Dye Degradation and Supercapacitor Applications

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • K. Tamilarasu,
  • R. Ranjith,
  • K. Silambarasan,
  • C. Umarani

摘要

In order to separate organic contaminants from wastewater and store energy, it is crucial to develop better and more stable catalyst and electrode materials. Because of their special electrical and physical characteristics, heterojunctions have drawn a lot of interest in catalytic, energy storage, and environmental applications. In this study, a molybdenum disulfide-tin disulfide@reduced graphene oxide (MSS@rGO) nanocomposite was prepared using a simple one-pot hydrothermal technique. The physicochemical properties of the nanocomposite were investigated through XRD, UV–Vis DRS, XPS, and TEM analysis, which confirmed the formation of the MSS@rGO nanocomposites. Additionally, the absorption characteristics, photocatalytic activity, and notable stability of the catalysts were evaluated against methylene blue (MB). The degradation efficiency of the synthesized catalysts was assessed, with MSS@rGO-40 demonstrating significant performance at 89% within 150 min, compared to MSS (45%), MSS@rGO-20 (76.6%), and MSS@rGO-60 (85%). The enhanced photocatalytic efficiency of the MSS@rGO-40 photocatalyst is attributed to superior electron–hole pair separation and the formation of the heterojunction structure. Furthermore, the recyclability of the MSS@rGO-40 nanocomposite catalysts was tested over four consecutive cycles, and the MSS@rGO-40 nanocomposite showed excellent stability after these cycles. At a current density of 1 A/g, the MSS@rGO-40 nanocomposite had a high specific capacitance of 154.1 F/g. Additionally, it showed outstanding long-term cycling stability, maintaining capacitance retention at over 98.6% and coulombic efficiency over 99.4% after 5000 charge–discharge cycles 5000.