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Catalysis in Green Chemistry and Engineering

Published 4 issues per year

ISSN Print: 2572-9896

ISSN Online: 2572-990X

H-Index: 2

Indexed in

ENZYME MIMIC OXIDASE-LIKE ACTIVITY OF Fe3O4 MAGNETIC NANOPARTICLES FOR DOPAMINE DETECTION

Volume 1, Issue 4, 2018, pp. 357-368
DOI: 10.1615/CatalGreenChemEng.2019029572
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ABSTRACT

Enzyme mimics have garnered substantial attention as they can overcome some severe drawbacks associated with nat- ural enzymes such as inhibition of their catalytic activity. The present study proves that the Fe3O4 magnetic nanoparticles (MNPs) exhibit an oxidase-like activity similar to that found in the tyrosinase enzyme. The Fe3O4 nanoparticles (NPs) were prepared by the solvothermal method and characterized by Fourier transform infrared, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray, X-ray photoelectron spectroscopy (XPS), and dynamic light scattering/zeta potential techniques to know the structural properties of MNPs. XPS analysis shows that the enzyme mimetic activity of NPs is due to Fe2+ and Fe3+ in Fe3O4 nanoparticle systems. Colorless dopamine forms colored dopamine-o-quinone due to surface modification of MNPs as well as both σ- and π-donor bonding contribution to overall stability. Enzyme mimetics Fe3O4 NPs were used as a new technique for colorimetric detection of dopamine.

CITED BY
  1. Zhang Haijuan, Chen Jia, Yang Yali, Wang Li, Li Zhan, Qiu Hongdeng, Discriminative Detection of Glutathione in Cell Lysates Based on Oxidase-Like Activity of Magnetic Nanoporous Graphene, Analytical Chemistry, 91, 8, 2019. Crossref

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