期刊
ELECTROANALYSIS
卷 24, 期 5, 页码 1192-1200出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201100670
关键词
a-Ni(OH)2 nanosheets; Electrochemistry; Glucose sensor; Self-assembly; Thin films
资金
- National Natural Science Foundation of China
- 863 Program [2009AA064201]
- 111 Project [B07004]
- Beijing Education Committee
This article reports the fabrication of Acid Violet 34 (AV34)/nickel hydroxide nanosheets ultrathin film on the glassy carbon electrode (GCE) via the electrostatic layer-by-layer (LBL) technique, and its electrocatalytic oxidation for glucose was demonstrated. UV-vis absorption and electrochemical impedance spectra indicate the uniform deposition of the LBL film, with a continuous and smooth film surface observed by SEM and AFM. The electrochemical performance of the ultrathin film was studied by cyclic voltammetry and chronoamperometry. The (AV34/Ni(OH)2)5 ultrathin film modified electrode displays a fast direct electron transfer attributed to the Ni2+/Ni3+ redox couple as well as remarkable electrocatalytic activity towards the oxidation of glucose. The linear response was obtained in the range 0.513.5 mM (R=0.9994) with a low detection limit (14 mu M), high sensitivity (25.9 mu A?mM-1?cm-2), rapid response (less than 1 s) and excellent anti-interference properties to the species including ascorbic acid (AA), uric acid (UA), acetamidophenol (AP) and structurally related sugars. Therefore, the AV34/Ni(OH)2 ultrathin film can be potentially used as a feasible electrochemical sensor for the determination of glucose.
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