Synthesis of Three Dimensional Nickel Cobalt Oxide Nanoneedles on Nickel Foam, Their Characterization and Glucose Sensing Application

Abstract

In the present work, NiCo2O4 nanostructures are fabricated in three dimensions (3D) on nickel foam by the hydrothermal method. The nanomaterial was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The nanostructures exhibit nanoneedle-like morphology grown in 3D with good crystalline quality. The nanomaterial is composed of nickel, cobalt and oxygen atoms. By using the favorable porosity of the nanomaterial and the substrate itself, a sensitive glucose sensor is proposed by immobilizing glucose oxidase. The presented glucose sensor has shown linear response over a wide range of glucose concentrations from 0.005 mM to 15 mM with a sensitivity of 91.34 mV/decade and a fast response time of less than 10 s. The NiCo2O4 nanostructures-based glucose sensor has shown excellent reproducibility, repeatability and stability. The sensor showed negligible response to the normal concentrations of common interferents with glucose sensing, including uric acid, dopamine and ascorbic acid. All these favorable advantages of the fabricated glucose sensor suggest that it may have high potential for the determination of glucose in biological samples, food and other related areas.

Rectangular flake-like mesoporous NiCo2O4 as enzyme mimic for glucose biosensing and biofuel cell

“…Among these cobalt-based metal oxides, NiCo 2 O 4 possesses more advantages than other Co-based metal oxides owing to the existence of Ni and Co ions. Up to now, NiCo 2 O 4 has been fabricated with many different morphologies including hollow nanorods [23], nanoneedles [22,24] as well as nanosheet arrays [25]. However, it is still necessary and meaningful to synthesize new structures with different morphologies for enhancing the catalytic activities of NiCo 2 O 4 in glucose oxidation.…”

Electrochemical deposition of CoNi micro/nanostructures as new materials for electrochemical sensing of glucose

“…A few recent investigations describe the use of Ni and Co bimetallic nanostructures for glucose sensing [4,6,11]. Nanoparticles of CoNi oxides have been also tested for sensing other biomolecules such as uric acid, due to the synergistic effect of the two metals in the alloy and the improved stability of the oxides respect to those of pure metals [3].…”

“…Glucose is one the biomolecules of greater importance in clinical diagnosis and food and pharmaceutical industries. The development of new glucose sensors is the aim of recent investigations [4][5][6][7]. Metallic nanostructures have been tested to replace enzymatic biosensors, to improve stability and selectivity [2,8,9].…”

Characterization of polycrystalline nickel cobaltite nanostructures prepared by DC plasma magnetron co-sputtering for gas sensing applications

“…It is utilized efficiently as electrode material in sodium-ion cells as well as electro-catalyst in alkaline water electrolyzer because of the low-cost production, environmental friendliness, high electrical conductivity, and optical properties in the infrared region of electromagnetic spectrum [5][6][7][8].…”