期刊
MICROCHIMICA ACTA
卷 187, 期 5, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-020-04227-5
关键词
Amperometric detection; Copper silicate; Human blood serum; Template method; One-pot preparation; Conducting polymers; Metal sulfides; Hydrothermal method
资金
- DST, New Delhi, India [DST/INSPIRE/04/2015/002259]
- National Research Foundation of Korea [NRF-2019R1F1A1059831]
Porous spheres of CuS@SiO2 were obtained by deposition of CuS on silica spheres through a one-step chemical method. Subsequently, polypyrrole (PPy) was deposited on the CuS@SiO2 spheres. The formation of the porous spheres was elucidated by control experiments and physical characterizations. The nanohybrid was placed on a glassy carbon electrode (GCE) surface where it displays good electrocatalytic activity in terms of glucose electrooxidation with an optimum at a working potential of 0.55 V (vs. Ag/AgCl) in 0.1 M NaOH solution. The PPy-CuS@SiO2 achieves an extremely high sensitivity (505.3 mu A mM(-1) cm(-2)), wide linear range (10 mu M-4.2 mM), low detection limit (1.0 mu M), short response time (< 0.5 s), high selectivity, long-term durability, and reproducibility. The fabricated electrode based on PPy-CuS@SiO2 was further used for the determination of glucose in blood sample with good recoveries.
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