Abstract In this article, we synthesize the bifunctional materials of various transition metals (TM) (Co, Ni and Mn) doped SnO2@MoS2 composites for enhanced energy storage and improved photocatalytic activity for removing organic pollutants. Herein, we use a facile hydrothermal method for sample synthesis and the physico chemical properties of the synthesized samples were investigated in detail using various analytical tools. The energy dispersive X-ray spectra and elemental mapping confirmed the presence of species in the synthesized samples. X-ray photoelectron spectroscopy analysis revealed the corresponding energy state of various TM doped SnO2@MoS2 samples. The Mn doped SnO2@MoS2 composite exhibited a higher specific capacitance of 242 F/g at a current density 0.5 A/g. The capacitance retention of 83.95% was observed after 5000 continuous charge/discharge cycles. Further, the Mn doped SnO2@MoS2 composite had higher degradation efficiency (97%) compared to all other samples using methylene blue as an organic dye under visible light irradiation. Henceforth, this study demonstrates the optimum concentration of Mn doped SnO2@MoS2 composite is the outstanding bifunctional materials for supercapacitor and photocatalytic applications.

中文翻译：

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用于超级电容器和光催化应用的各种过渡金属掺杂的 SnO2@MoS2 复合材料的合成和表征

摘要 在本文中，我们合成了各种过渡金属 (TM)（Co、Ni 和 Mn）掺杂的 SnO2@MoS2 复合材料的双功能材料，以增强能量存储和提高光催化去除有机污染物的活性。在这里，我们使用简便的水热法进行样品合成，并使用各种分析工具详细研究了合成样品的理化性质。能量色散 X 射线光谱和元素映射证实了合成样品中物质的存在。X 射线光电子能谱分析揭示了各种 TM 掺杂的 SnO2@MoS2 样品的相应能态。Mn 掺杂的 SnO2@MoS2 复合材料在 0.5 A/g 的电流密度下表现出更高的比电容 242 F/g。83的电容保持率。在 5000 次连续充电/放电循环后观察到 95%。此外，与使用亚甲蓝作为有机染料在可见光照射下的所有其他样品相比，Mn 掺杂的 SnO2@MoS2 复合材料具有更高的降解效率（97%）。此后，该研究证明了 Mn 掺杂的 SnO2@MoS2 复合材料的最佳浓度是用于超级电容器和光催化应用的优秀双功能材料。