One-step formation of a hybrid material of graphene and porous Ni with highly active Ni(OH) 2 used for glucose detection

• Published in: Nanotechnology Vol. 31; no. 18; p. 185501
• Main Authors: Ren, Zhaodi, Mao, Haochao, Luo, Haowen, Deng, Xiangjun, Liu, Yuanan
• Format: Journal Article
• Language: English
• Published: England 01.05.2020
• Subjects: Electrochemistry; Glucose - analysis; Graphite - chemistry; Hydroxides - chemistry; Nickel - chemistry; Photoelectron Spectroscopy; Porosity; Spectrum Analysis, Raman; X-Ray Diffraction
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/1361-6528/ab6ab7

A hybrid material of graphene and porous Ni with highly active Ni(OH) was formed through a one-step electrochemical exfoliation assisted method. The porous Ni with a pore size of 2-10 micrometers obtained by a hydrogen bubble template method was used as the cathode while the graphite foil was used as the anode with only (NH ) SO as the electrolyte. Both the high surface areas of porous Ni and the oxygen radicals in graphene favored the formation of the Ni(OH) . It is confirmed by energy dispersion spectrum, transmission electron microscope, Raman spectroscopy, x-ray diffraction and x-ray photoelectron spectroscopy analysis. Both the active area and the glucose sensing property of the as-prepared hybrid material were estimated by electrochemical methods of cyclic voltammetry with current-voltage (C-V) curve, chronoamperometry with current-time (I-t) curve and electrochemical impedance spectroscopy analysis, respectively. It shows an extraordinary active area as well as a low charge transfer resistance and absorption resistance. As a result, a high sensitivity of 6504 μA/mM cm within a linear range of 4 μM-1.0 mM was obtained for glucose detection.