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Fluorescence detection of valence speciation of Cr(III) based on the catechol oxidase mimic enzyme activity of CuSeNP nanozymes
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Fluorescence detection of valence speciation of Cr(III) based on the catechol oxidase mimic enzyme activity of CuSeNP nanozymes
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Journal Article
Fluorescence detection of valence speciation of Cr(III) based on the catechol oxidase mimic enzyme activity of CuSeNP nanozymes
2024
Overview
Copper selenide nanoparticles (CuSeNP) were synthesized using histidine, ethylenediamine, and sodium selenate as precursors by one-step microwave digestion methods. The as-prepared CuSeNPs exhibit excellent catechol oxidase mimic enzyme and catalase (CAT)-like activities. Dopamine (DA) can be oxidized to aminochrome with H
2
O
2
by CuSeNPs, and the intermediate product aminochrome can further react with
α
-naphthol to yield a highly fluorescent derivative. It was confirmed that Cr(III) could adsorb on the surface of CuSeNPs and inhibit the production of semiquinone radicals in the reaction system, and the catalytic activity of CuSeNPs was inhibited. The detection mechanisms, kinetics, and catalytic properties of CuSeNPs were systematically investigated. As a result, a novel fluorescence method for the assay of Cr(III) was established. The feasibility of CuSeNP nanozyme in detecting speciation Cr(III) in food samples was explored with satisfactory results. It showed the obvious potential for developing effective and dependable fluorescent detection method for protecting food safety.
Graphical Abstract
Publisher
Springer Vienna,Springer,Springer Nature B.V
Subject
/ Biomimetic Materials - chemistry
/ Catalase
/ Catechin
/ Catechol
/ Catechol Oxidase - chemistry
/ Catechol Oxidase - metabolism
/ Characterization and Evaluation of Materials
/ Chemistry and Materials Science
/ Copper
/ Dopamine
/ Enzymes
/ Food
/ Food Contamination - analysis
/ Hydrogen Peroxide - chemistry
/ Metal Nanoparticles - chemistry
/ Nitrates
/ Oxidase
/ Oxidases
/ Safety and security measures
/ Selenide
/ Selenium Compounds - chemistry
