期刊
MICROCHIMICA ACTA
卷 182, 期 13-14, 页码 2183-2192出版社
SPRINGER WIEN
DOI: 10.1007/s00604-015-1549-x
关键词
Nonenzymatic glucose sensor; Graphene oxide; Pd-CuO/rGO nanocomposite; Screen printed electrode
资金
- Department of Biotechnology, India [BT/PR14849/MED/32/157/2010, BT/PR4076/MED/32/221 /2011]
- Department of Science and Technology (DST) [DST/INSPIRE Fellowship/2011/ [4]]
A nanocomposite consisting of reduced graphene oxide decorated with palladium-copper oxide nanoparticles (Pd-CuO/rGO) was synthesized by single-step chemical reduction. The morphology and crystal structure of the nanocomposite were characterized by field-emission scanning electron microscopy, high resolution transmission electron microscopy and X-ray diffraction analysis. A 3-electrode system was fabricated by screen printing technology and the Pd-CuO/rGO nanocomposite was dropcast on the carbon working electrode. The catalytic activity towards glucose in 0.2 M NaOH solutions was analyzed by linear sweep voltammetry and amperometry. The steady state current obtained at a constant potential of +0.6 V (vs. Ag/AgCl) showed the modified electrode to possess a wide analytical range (6 mu M to 22 mM), a rather low limit of detection (30 nM), excellent sensitivity (3355 mu Aa (TM) mM(-1)a (TM) cm(-2)) and good selectivity over commonly interfering species and other sugars including fructose, sucrose and lactose. The sensor was successfully employed to the determination of glucose in blood serum.
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