硕士研究生王霜与其课题组研究团队,包括刘茂祥、高娟娟、钱悦月等人，构建了一种新型的MoS₂-NiCo₂O₄纳米复合材料，并将其应用于修饰玻碳电极简便灵敏的检测葡萄糖浓度。在该纳米复合材料中，MoS₂被设计用作一种灵巧的NiCo₂O₄的连接物。具有高导电性的六角型NiCo₂O₄在被连接后形成了一种高效的导电网络，该网络被证实拥有对于葡萄糖的高的催化活性。在应用点位+0.418V下即可完成对较低浓度葡萄糖的催化氧化，灵敏度高达1748.58μAmM^-1cm^-2，检测下限为0.152 μmmol/L。同时该电极已经成功应用于对血清中葡萄糖的检测，未来极有希望为糖尿病的诊断预防作出贡献。

Title:MoS₂ as connector inspired high electrocatalytic performance of NiCo₂O₄ nanoplates towards glucose

Authors: Shuang Wang^a, Shupeng Zhang^a,*, Maoxiang Liu^a, Haiou Song^b,*, Juanjuan Gao^a, Yueyue Qian^a

Abstract: A novel MoS₂-NiCo₂O₄ architecture with highly sensitive determination toward glucose is constructed successfully in this work. MoS₂ nanosheets are regarded as clever connectors to connect NiCo₂O₄ nanoplates together, which would inspire the electrocatlytic performance of NiCo₂O₄ nanoplates acted as active sites greatly. The interesting nanostructure and composition were confirmed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy, etc. Rational incorporation of MoS₂ as an electron collector can promote the formation of conductive chains among the NiCo₂O₄nanoplates, accompanying with inhibiting of NiCo₂O₄ aggregation. The conductive path can accelerate the charge transfer significantly. The MoS₂-NiCo₂O₄ modified GCE exhibits enhanced electrocatalytic activity toward the oxidation of glucose, compared with NiCo₂O₄ nanoplates. At a potential of + 0.418 V, the fabricated biosensor demonstrates a wide detection range with high sensitivity (1748.58 μAmM^-1cm^-2) and a low detection limit of 0.152 μM. It also shows anti-interference for ascorbic acid, uric acid, dopamine and chloride ion. Besides, it owns good reproducibility, repeatability and long-term stability. Excellent catalytic oxidation performance for glucose supports that MoS₂-NiCo₂O₄ hybrid is an outstanding and promising electrode material toward glucose biosensor.

全文链接：http://www.sciencedirect.com/science/article/pii/S0925400517314338

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