Synthesis of NiCo2O4 Nanostructures and Their Electrochemial Properties for Glucose Detection

Abstract

In this work, we prepared spinel-type NiCo2O4 (NCO) nanopowders as a low-cost and sensitive electrochemical sensor for nonenzymatic glucose detection. A facile and simple chemical bath method to synthesize the NCO nanopowders is demonstrated. The effect of pH and annealing temperature on the formation mechanism of NCO nanoparticles was systematically investigated. Our studies show that different pHs of the precursor solution during synthesis result in different intermediate phases and relating chemical reactions for the formation of NCO nanoparticles. Different morphologies of the NCO depending on pHs are also discussed based on the mechanism of growth. Electrochemical performance of the prepared NCO was characterized towards glucose, which reveals that sensitivity and selectivity of the NCO are significantly related with the final microstructure combined with constituent species with multiple oxidation states in the spinel structure.

Hydrothermal-Dependent Synthesis of Exfoliated Nickel Cobaltite Layers for Simultaneous Determination of IARC Group 2B, 3B Carcinogens

“…Figure C illustrates the Co 2p spectra, which show spin–orbit doublets (Co 2+ , ∼782.9 eV and ∼797.3 eV; Co 3+ , ∼781 eV and ∼796.3 eV), as well as two shakeup satellites. Figure D displays the O 1s peak (M–O) of NCO and is consistent with the findings in the literature. , …”

Phytochemicals of mustard (Brassica Campestris) leaves tuned the nickel‐cobalt bimetallic oxide properties for enzyme‐free sensing of glucose

“…[ 12–14 ] Transition metal oxides exhibit excellent catalytic properties toward glucose oxidation. [ 15–19 ] The shape, size, and surface morphology can greatly improve the electrochemical properties of nanostructured metal oxides. [ 18,20–24 ] As part of the development of modern electrochemical sensors and biosensors, various materials derived from transition metals have been tested for glucose sensing applications.…”

A low-cost and facile electrochemical sensor for the trace-level recognition of flutamide in biofluids using large-area bimetallic NiCo2O4 micro flowers

“…17 In the past decade, a variety of synthesis techniques like chemical bath synthesis, the sol-gel method, co-precipitation, electrodeposition, nano casting, hydroxide decomposition, and hydrothermal methods have been reported for spinel NCO synthesis. 19,20 Among these techniques, the hydrothermal technique possesses advantages of having a higher rate of reaction, being pollution-free, having better nucleation control, cost-effectiveness, etc. 21 Herein, we report a substrate-free, one-pot hydrothermal synthesis of NCO micro flowers for the electrochemical detection of flutamide in biofluids.…”