期刊
ANALYTICAL METHODS
卷 10, 期 3, 页码 381-388出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ay02290e
关键词
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资金
- National Natural Science Foundation of China [21375045]
- Natural Science Foundation of Jilin Province [20130101118JC]
In this work, a copper sulfide nanoflakes-reduced graphene oxide (rGO/CuSNFs) nanocomposite has been successfully synthesized via one-pot hydrothermal treatment, where the reduction of GO and in situ generation of CuS nanoflakes occurred simultaneously. Subsequently, a nonenzymatic electrochemical sensor was fabricated based on the disposable rGO/CuSNFs nanocomposite for the highly sensitive and selective detection of glucose. The prepared rGO/CuSNFs nanocomposite was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDX), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy, respectively. Under optimized conditions, the prepared enzymeless sensor exhibited remarkable catalytic activity toward the glucose oxidation with a fast response time of <6 s, a wide linear range from 1 to 2000 mM, a high sensitivity of 53.5 mu M (cm(2) mM)(-1) and a low detection limit of 0.19 mu M. Furthermore, the rGO/CuSNFs/GCE also showed the great reproducibility, the long-term storage stability and the excellent anti-interference ability for glucose sensing. In addition, the as-prepared sensor was applied to detect glucose in human urine and blood serum samples with satisfactory results, indicating that the rGO/CuSNFs nanocomposite is an extremely promising material for non-enzymatic glucose sensing in practical samples.
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