Copper oxide supported on three-dimensional ammonia-doped porous reduced graphene oxide prepared through electrophoretic deposition for non-enzymatic glucose sensing

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• 作者：Houcem Maaoui^a ; ^b ; Santosh K. Singh^a ; ^c ; ^d ; Florina Teodorescu^a ; Yannick Coffinier^a ; Alexandre Barras^a ; Radhouane Chtourou^e ; Sreekumar Kurungot^c ; ^d ; Sabine Szunerits^a ; Rabah Boukherroub^a ; ^{rabah.boukherroub@iemn.univ-lille1.fr}
• 关键词：Porous ammonia-doped reduced graphene oxide ; Copper oxide nanoparticles ; EPD ; Glucose ; Non-enzymatic ; Electrochemistry
• 刊名：Electrochimica Acta
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：224
• 期：Complete
• 页码：346-354
• 全文大小：1561 K
• 卷排序：224

文摘

The paper reports on the preparation of N-doped porous reduced graphene oxide/copper oxide (ammonia-doped-prGO/CuO) nanocomposite on gold electrodes using electrophoretic deposition (EPD) from an ethanolic suspension of ammonia-doped-prGO and Cu(ClO4)2 by applying a DC voltage. The ammonia-doped-prGO/CuO nanocomposite film thickness is controlled by varying the deposition time. Morphological analysis using scanning electron microscopy (SEM) showed the formation of a 3-dimensional structure with CuO nanoparticles being homogeneously embedded in the graphene layer. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman analysis revealed that the deposited copper was in its oxidized form, mainly CuO. The Au/ammonia-doped-prGO/CuO electrode was successfully applied for non-enzymatic amperometric detection of glucose. Under optimized conditions, the electrode exhibited a sensitivity of 1210 μA mM−1 cm−2 with a detection limit of 0.25 μM (S/N = 3) over a wide concentration range (0.25 μM to 6 mM) at an applied potential of +0.50 V vs. Ag/AgCl. The electrode material displayed good stability, excellent selectivity, and accurate measurement in healthy and diabetic human serum samples.