Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 172, Issue -, Pages 565-572Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2018.09.005
Keywords
MnO2 nanorods; Reduced graphene oxide; Modified electrode; Amaranth detection; Second-order derivative linear sweep; voltammogram
Funding
- NSFC [61703152]
- Natural Science Foundation of Hunan Province [2016JJ4010, 2018JJ3134]
- Hengyang Normal University Provincial Platform Open Fund Project [GD16K02]
- Fundamental Research Funds for the Central Universities of Central South University [2015zzts018]
- Project of Science and Technology Plan in Zhuzhou [201707-201806]
Ask authors/readers for more resources
A novel manganese dioxide nanorods-electrochemically graphene oxide nanocomposites modified glassy carbon electrode (MnO(2)NRs-ErGO/GCE) was developed for the rapid and sensitive detection of Amaranth in foodstuffs. The morphology, structure and composition of MnO(2)NRs, ErGO, and MnO2/ErGO were characterized by SEM and XRD. The electrochemical behavior of Amaranth on the bare GCE, ErGO/GCE, and MnO(2)NRs-ErGO/GCE were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The voltammetric conditions (including pH, scan rate, accumulation potential as well as time) were optimized systematically. Due to large electrochemical active area and low charge transfer resistance, the MnO(2)NRs-ErGO/GCE exhibited a great enhancement effect on the oxidation of Amaranth, and significant increased the oxidation peak current i(pa) (approximately 38-fold increase compared to that of bare GCE). Under the optimum voltammetric conditions, the ipa varied linearly with Amaranth concentration in the range of 0.02 mu M-10 mu M, and 10 mu M-400 mu M with a low detection limit of 1.0 nM (S/N = 3). Moreover, satisfactory results were obtained in the analysis of real samples. Together with the merits of rapidness, cost-effectivity, high sensitivity and selectivity, the result suggests the proposed MnO(2)NRs-ErGO/GCE have broad application prospects on the sensitive detection of Amaranth in various real samples.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available