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Self-supported Cu2S/Cu(OH)2 composite nanorods for highly sensitive non-enzymatic glucose sensing were in situ grown on Cu foam by simple hydrothermal treatment of aligned Cu(OH)2 nanorods. The physicochemical and electrochemical properties of the as-fabricated Cu2S/Cu(OH)2 composite nanorods were characterized by scanning electron microscopy, transmission electron microscopy, x-ray diffraction, Raman spectroscope, x-ray photoelectron spectroscope, cyclic voltammetry, electrochemical impedance spectroscopy, amperometric i â€" t measurements. The mechanism of the composite nanorods produced on conductive substrates was also explored. The electrode exhibits a sensitivity of 9626.88 ÎĽ A mMâˆ'1 cmâˆ'2 towards glucose with good anti-interference ability, indicating it a promising electrode material for the enhanced non-enzymatic glucose detection. [ABSTRACT FROM AUTHOR]

Co(OH)2 nanosheets/Cu(OH)2 nanorods composite electrodes for non-enzymatic glucose detection were fabricated by electrodepositing Co(OH)2 nanosheets on Cu(OH)2 nanorods substrate grown directly on the copper sheet via a simple one-step reaction. The Co(OH)2 nanosheets/Cu(OH)2 nanorods composite electrode was characterized by scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction and x-ray photoelectron spectroscopy. The glucose sensing performance of the composite electrode was investigated by cyclic voltammetry and chronoamperometry. The composite electrode shows high sensitivity of 2366 µA mM−1 cm−2 up to 2 mM with a lower detection limit of 0.17 mM (S/N = 3). The composite electrode is highly selective to glucose in the presence of various substances that always co-exist with glucose in real blood samples. The response of the composite towards human blood serum was in good agreement with that of commercially available glucose sensors, suggesting that a promising electrode material for highly sensitive and selective non enzymatic detection of glucose can be envisioned. [ABSTRACT FROM AUTHOR]

[Display omitted] • Bimetallic CuCo-MOFs/NF were successfully in-situ prepared by hydrothermal treatment. • The morphology of bimetallic MOFs can be adjusted by changing the ratio of metal ions. • The CuCo-MOFs/NF shows high sensitivity of 8304.4 μA mM−1 cm−2 for glucose sensing. Metal-organic frameworks (MOFs) have great potential for electrochemical biosensors. In this paper, bimetallic MOFs were successfully in-situ grown on nickel foam (NF) through a facile one-pot hydrothermal treatment. X-ray diffraction, X-ray photoelectron spectroscope, Fourier transform infrared spectroscopy, energy dispersive spectrometer, and scanning electron microscopy were used to the structural and morphological characterization of bimetallic MOFs. Electrochemical measurement indicated that Cu 1 Co 2 -MOF/NF composite electrode processed a high sensitivity of 8304.4 μA mM−1 cm−2, a low detection limit of 0.023 mM (S/N = 3). Moreover, it also showed good anti-interference ability toward ascorbic acid (AA), uric acid (UA), dopamine hydrochloride (DA) and sodium chloride (NaCl). These results suggest that Cu 1 Co 2 -MOF/NF is a promising electrode material for high-performance glucose sensing. [ABSTRACT FROM AUTHOR]