Journal
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Volume 84, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2019.103280
Keywords
Manganese dioxide; Morphology; Graphene; Elecctrochemical reduction; Quinoline yellow; Electrochemical sensor; Determination
Categories
Funding
- Doctoral Program Construction of Hunan University of Technology
- Postgraduates Innovation Fund of HUT
- NSFC [61703152]
- Hunan Provincial Natural Science Foundation [2016JJ4010, 2018JJ34]
- Project of Science and Technology Plan in Zhuzhou [201706-201806]
- Project of Science and Technology Department of Hunan Province [GD16K02, 18A273, 18C0522]
- Opening Projects of Key Laboratory of Functional Organometallic Materials, University of Hunan Province [GN19K01, GN19K05]
- Project of Hengyang Normal University [HXKJ201912]
- Project of Key Laboratory of Functional Metal-Organic Compounds of Hunan Province [MO19K08]
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Developing simple and accurate QY detection methods is of great significant importance in ensuring food safety including drinks. Manganese dioxide nanoparticles (MnO2 NPs) with different morphologies were synthesized by hydrothermal method. Manganese dioxide/graphene (MnO2/GR) nanocomposites were directly prepared on the surface of glassy carbon electrode (GCE) by electrochemical reduction. The materials were characterized by Xray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The effects of nano-MnO2 with different morphologies on the performance of quinoline yellow (QY) detection was investigated. The experimental findings revealed that MnO2 nanorods (MnO2 NRs) had better properties than both MnO2 nanowires (MnO2 NWs) and MnO2 nanotubes (MnO2 NTs). Under optimal experimental conditions, a good linear relationship between peak current of QY on GR/MnO2 NRs/GCE and concentrations ranging between 0.1 mu M(-)6.0 mu M and 6.0 mu M(-)60 mu M were observed, and 0.04 mu M was the detection limit. The fabricated sensor was successfully tested to detect QY in soft drinks.
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