title: Free-standing electrochemical electrode based on Ni(OH)2/3D graphene foam for nonenzymatic glucose detection.
abstract: Three-dimensional graphene foam (3DGF) is a superior sensing material because of its high conductivity, large specific surface area and wide electrochemical potential windows. In this work, hexagonal Ni(OH)2 nanosheets are deposited on the surface of chemical vapor deposition-grown 3DGF through a facial hydrothermal process without any auxiliary reagents. The morphology and structure of the composite are characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Raman spectroscopy, and X-ray diffraction (XRD). Based on the Ni(OH)2/3DGF composite, a free-standing electrochemical electrode is fabricated. Being employed as a nonenzymatic glucose detection electrochemical electrode, it exhibits a high sensitivity (∼2.65 mA mM(-1) cm(-2)), low detection limit (0.34 μM) and excellent selectivity with a linear response from 1 μM to 1.17 mM. The excellent sensing properties of the Ni(OH)2/3DGF electrode may be attributed to the synergistic effect of the high electrocatalytic activity of Ni(OH)2 nanosheets and the high conductivity and large surface area of 3DGF.
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Nanjing University of Posts and Telecommunications, Nanjing 210023, China. iamxcdong@njtech.edu.cn.
authors.forename: Beibei
authors.initials: B
authors.lastname: Zhan
authors.forename: Changbing
authors.initials: C
authors.lastname: Liu
authors.forename: Huaping
authors.initials: H
authors.lastname: Chen
authors.forename: Huaxia
authors.initials: H
authors.lastname: Shi
authors.forename: Lianhui
authors.initials: L
authors.lastname: Wang
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Xiaochen
authors.initials: X
authors.lastname: Dong
mesh_terms: D055664:Electrochemical Techniques; D004566:Electrodes; D005947:Glucose / Q000032:analysis*; D006108:Graphite / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
chemical_list: D006878:Hydroxides; C037473:nickel hydroxide; D006108:Graphite; D009532:Nickel; D005947:Glucose