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As a novel nanomaterial after graphene, molybdenum disulfide (MoS 2 ) has potential applications in electrochemical sensing and other fields, while the low electric conductivity of MoS 2 limits its application significantly. In this paper, carbon spheres (CSs) wrapped with molybdenum disulfide (CSs@MoS 2 ) novel nanostructure was successfully prepared via a green hydrothermal method and then used for firstly electrochemical sensing of 4-aminophenol (4-AP, one toxic pollutant). The morphology and structure of CSs@MoS 2 were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy and electrochemical impedance spectroscopy. As an electrochemical sensor, CSs@MoS 2 nanohybrids modified electrode exhibits excellent electrochemical sensing performance toward 4-AP analysis owing to the synergetic advantages of MoS 2 and CSs. Under the optimized conditions, the detection limit of 4-AP obtained in this work is 3 nM and the linear range is 0.01-18.00 μM.

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