In this work,a fascinating nanocomposite based on manganese-cobalt sulfide(MnS/Co_(3)S_(4))wrapped by electrochemically reduced graphene oxide(ERGO)has been successfully synthesized on the surface of a glassy carbon e...In this work,a fascinating nanocomposite based on manganese-cobalt sulfide(MnS/Co_(3)S_(4))wrapped by electrochemically reduced graphene oxide(ERGO)has been successfully synthesized on the surface of a glassy carbon electrode(GCE)by a facile hydrothermal assisted electrochemical reduction method.The modified electrode was fully characterized by scanning electron microscopy,cyclic voltammetry and electrochemical impedance spectroscopy.The morphological results illustrate that MnS/Co_(3)S_(4) are embedded in the ERGO layers,resulting in a rough surface and three-dimensional(3D)microstructure.The as-synthesized MnS/Co_(3)S_(4)-ERGO/GCE displays distinctly enhanced electrocatalytic activity for vanillin oxidation in comparison with that of the ERGO/GCE and MnS/Co_(3)S_(4)/GCE.Therefore,the MnS/Co_(3)S_(4)-ERGO/GCE can be used as an effective electrochemical sensing platform for the sensitive determination of vanillin,and the fabricated sensor displays a wide linear range of 0.02−1.00 mmol/L and 1.0−40.0 mmol/L,low detection limit of 4.0 nmol/L and satisfactory recoveries between 98.0%and 102.8%.展开更多
基金supported by Scientific research Fund of Hunan Provincial Education Department(22C0401)Project of Key Laboratory of Functional Metal-organic Compounds of Hunan Province(2022HSKFJJ026).
文摘In this work,a fascinating nanocomposite based on manganese-cobalt sulfide(MnS/Co_(3)S_(4))wrapped by electrochemically reduced graphene oxide(ERGO)has been successfully synthesized on the surface of a glassy carbon electrode(GCE)by a facile hydrothermal assisted electrochemical reduction method.The modified electrode was fully characterized by scanning electron microscopy,cyclic voltammetry and electrochemical impedance spectroscopy.The morphological results illustrate that MnS/Co_(3)S_(4) are embedded in the ERGO layers,resulting in a rough surface and three-dimensional(3D)microstructure.The as-synthesized MnS/Co_(3)S_(4)-ERGO/GCE displays distinctly enhanced electrocatalytic activity for vanillin oxidation in comparison with that of the ERGO/GCE and MnS/Co_(3)S_(4)/GCE.Therefore,the MnS/Co_(3)S_(4)-ERGO/GCE can be used as an effective electrochemical sensing platform for the sensitive determination of vanillin,and the fabricated sensor displays a wide linear range of 0.02−1.00 mmol/L and 1.0−40.0 mmol/L,low detection limit of 4.0 nmol/L and satisfactory recoveries between 98.0%and 102.8%.
