Three-dimensional Co3O4@MWNTs nanocomposite with enhanced electrochemical performance for nonenzymatic glucose biosensors and biofuel cells.
Kailong JiaoYu JiangZepeng KangRuiyun PengShuqiang JiaoZongqian HuPublished in: Royal Society open science (2017)
Three-dimensional nanoarchitectures of Co3O4@multi-walled carbon nanotubes (Co3O4@MWNTs) were synthesized via a one-step process with hydrothermal growth of Co3O4 nanoparticles onto MWNTs. The structure and morphology of the Co3O4@MWNTs were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller, scanning electron microscopy and transmission electron microscopy. The electrocatalytic mechanism of the Co3O4@MWNTs was studied by X-ray photoelectron spectroscopy and cyclic voltammetry. Co3O4@MWNTs exhibited high electrocatalytic activity towards glucose oxidation in alkaline medium and could be used in nonenzymatic electrochemical devices for glucose oxidation. The open circuit voltage of the nonenzymatic glucose/O2 fuel cell was 0.68 V, with a maximum power density of 0.22 mW cm-2 at 0.30 V. The excellent electrochemical properties, low cost, and facile preparation of Co3O4@MWNTs demonstrate the potential of strongly coupled oxide/nanocarbon hybrid as effective electrocatalyst in glucose fuel cells and biosensors.
Keyphrases
- electron microscopy
- blood glucose
- induced apoptosis
- gold nanoparticles
- reduced graphene oxide
- molecularly imprinted
- low cost
- walled carbon nanotubes
- high resolution
- label free
- cell cycle arrest
- ionic liquid
- hydrogen peroxide
- single cell
- minimally invasive
- magnetic resonance imaging
- oxidative stress
- electron transfer
- computed tomography
- skeletal muscle
- visible light
- mesenchymal stem cells
- climate change
- bone marrow
- cell death
- human health
- insulin resistance
- glycemic control
- oxide nanoparticles