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

Abstract

A hybrid material of graphene and porous Ni with highly active Ni(OH) 2 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 4 ) 2 SO 4 as the electrolyte. Both the high surface areas of porous Ni and the oxygen radicals in graphene favored the formation of the Ni(OH) 2 . 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 −1 cm −2 within a linear range of 4 μM-1.0 mM was obtained for glucose detection.

Heterostructural NiCo2O4 Nanocomposites for Nonenzymatic Electrochemical Glucose Sensing

“…Transition metals obviously are more economically efficient than novel metals. Ren et al [15] prepared graphene and porous Ni with highly active Ni(OH) 2 for glucose sensing, with a linear range of 4 μM-1.0 mM. Cu core shell nanosphere based non-enzymatic sensor can determinate 3-12 mM glucose, with detection limit of 1.45 mM [16].…”

Developments of the Electroactive Materials for Non-Enzymatic Glucose Sensing and Their Mechanisms

“…Finally, the crucial materials, which determine the performance of the glucosesensing electrodes, would be the electroactive materials (Figure 6c-g). There are many types of electroactive material for the sensing of glucose by the electrochemical methods, such as (1) metal materials and (2) alloy materials [34][35][36][37][48][49][50]53,61,[125][126][127][128][129][130][131][132] (Figure 6c,d), (3) oxide materials and (4) hydroxide materials [39,40,51,52,54,55,58,59,[64][65][66][133][134][135][136][137][138][139] (Figure 6e,f), as well as ( 5) composite materials [38,[42][43][44][45][46][47]56,…”

One-step potentiostatic electrodeposition of NiS–NiS2 on sludge-based biochar and its application for a non-enzymatic glucose sensor

“…5,7,8 However, the high cost of noble metals sensor is bounded to be limited in practical applications. 9 As reported up to now, nickelbased compounds including suldes, hydroxides, oxides, and phosphates have been reported as efficient glucose sensors materials, of which nickel suldes exhibited excellent electrocatalytic performance and electrical conductivity, and nickel suldes have been sufficiently exploited in the progress of enzyme mimic glucose sensors, such as Ni 3 S 2 /carbon nanotube, NiS/Ni(OH) 2 /NH 4 PA/PPyNTs, NiS/S-g-C 3 N 4 . 5,6,[10][11][12][13] These sensors could detect glucose sensitively, but expensive carbonaceous materials (C 3 N 4 , PPyNTs, carbon nanotube) yet increase the test cost.…”