Fabrication of porous NiMn₂O₄ nanosheet arrays on nickel foam as an advanced sensor material for non-enzymatic glucose detection.

ABSTRACT: In this work, porous NiMn₂O₄ nanosheet arrays on nickel foam (NiMn₂O₄ NSs@NF) was successfully fabricated by a simple hydrothermal step followed by a heat treatment. Porous NiMn₂O₄ NSs@NF is directly used as a sensor electrode for electrochemical detecting glucose. The NiMn₂O₄ nanosheet arrays are uniformly grown and packed on nickel foam to forming sensor electrode. The porous NiMn₂O₄ NSs@NF electrode not only provides the abundant accessible active sites and the effective ion-transport pathways, but also offers the efficient electron transport pathways for the electrochemical catalytic reaction by the high conductive nickel foam. This synergy effect endows porous NiMn₂O₄ NSs@NF with excellent electrochemical behaviors for glucose detection. The electrochemical measurements are used to investigate the performances of glucose detection. Porous NiMn₂O₄ NSs@NF for detecting glucose exhibits the high sensitivity of 12.2?mA?mM^-1 cm^-2 at the window concentrations of 0.99-67.30 ?M (correlation coefficient?=?0.9982) and 12.3?mA?mM^-1 cm^-2 at the window concentrations of 0.115-0.661?mM (correlation coefficient?=?0.9908). In addition, porous NiMn₂O₄ NSs@NF also exhibits a fast response of 2?s and a low LOD of 0.24?µM. The combination of porous NiMn₂O₄ nanosheet arrays and nickel foam is a meaningful strategy to fabricate high performance non-enzymatic glucose sensor. These excellent properties reveal its potential application in the clinical detection of glucose.

SUBMITTER: Zhang J 

PROVIDER: S-EPMC6889510 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature