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Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water

Certain nano-scale metal oxides exhibiting the intrinsic enzyme-like reactivity had been used for environment monitoring. Herein, we evaluated the oxidase-mimicking activity of environmentally relevant nano-MnO(2) and its sensitivity to the presence of metal ions, and particularly, the use of MnO(2)...

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Autores principales: Sun, Kai, Liu, Qingzhu, Zhu, Rui, Liu, Qi, Li, Shunyao, Si, Youbin, Huang, Qingguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6925722/
https://www.ncbi.nlm.nih.gov/pubmed/31885591
http://dx.doi.org/10.1155/2019/5416963
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author Sun, Kai
Liu, Qingzhu
Zhu, Rui
Liu, Qi
Li, Shunyao
Si, Youbin
Huang, Qingguo
author_facet Sun, Kai
Liu, Qingzhu
Zhu, Rui
Liu, Qi
Li, Shunyao
Si, Youbin
Huang, Qingguo
author_sort Sun, Kai
collection PubMed
description Certain nano-scale metal oxides exhibiting the intrinsic enzyme-like reactivity had been used for environment monitoring. Herein, we evaluated the oxidase-mimicking activity of environmentally relevant nano-MnO(2) and its sensitivity to the presence of metal ions, and particularly, the use of MnO(2) nanozyme to potentially detect Cu(2+), Zn(2+), Mn(2+), and Fe(2+) in water. The results indicated the oxidase-like activity of nano-MnO(2) at acidic pH-driven oxidation of 2,6-dimethoxyphenol (2,6-DMP) via a single-electron transfer process, leading to the formation of a yellow product. Notably, the presence of Cu(2+) and Mn(2+) heightened the oxidase-mimicking activity of nano-MnO(2) at 25°C and pH 3.8, showing that Cu(2+) and Mn(2+) could modify the reactive sites of nano-MnO(2) surface to ameliorate its catalytic activity, while the activity of MnO(2) nanozyme in systems with Zn(2+) and Fe(2+) was impeded probably because of the strong affinity of Zn(2+) and Fe(2+) toward nano-MnO(2) surface. Based on these effects, we designed a procedure to use MnO(2) nanozyme to, respectively, detect Cu(2+), Zn(2+), Mn(2+), and Fe(2+) in the real water samples. MnO(2) nanozyme-based detecting systems achieved high accuracy (relative errors: 2.2–26.1%) and recovery (93.0–124.0%) for detection of the four metal ions, respectively. Such cost-effective detecting systems may provide a potential application for quantitative determination of metal ions in real water environmental samples.
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spelling pubmed-69257222019-12-29 Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water Sun, Kai Liu, Qingzhu Zhu, Rui Liu, Qi Li, Shunyao Si, Youbin Huang, Qingguo Int J Anal Chem Research Article Certain nano-scale metal oxides exhibiting the intrinsic enzyme-like reactivity had been used for environment monitoring. Herein, we evaluated the oxidase-mimicking activity of environmentally relevant nano-MnO(2) and its sensitivity to the presence of metal ions, and particularly, the use of MnO(2) nanozyme to potentially detect Cu(2+), Zn(2+), Mn(2+), and Fe(2+) in water. The results indicated the oxidase-like activity of nano-MnO(2) at acidic pH-driven oxidation of 2,6-dimethoxyphenol (2,6-DMP) via a single-electron transfer process, leading to the formation of a yellow product. Notably, the presence of Cu(2+) and Mn(2+) heightened the oxidase-mimicking activity of nano-MnO(2) at 25°C and pH 3.8, showing that Cu(2+) and Mn(2+) could modify the reactive sites of nano-MnO(2) surface to ameliorate its catalytic activity, while the activity of MnO(2) nanozyme in systems with Zn(2+) and Fe(2+) was impeded probably because of the strong affinity of Zn(2+) and Fe(2+) toward nano-MnO(2) surface. Based on these effects, we designed a procedure to use MnO(2) nanozyme to, respectively, detect Cu(2+), Zn(2+), Mn(2+), and Fe(2+) in the real water samples. MnO(2) nanozyme-based detecting systems achieved high accuracy (relative errors: 2.2–26.1%) and recovery (93.0–124.0%) for detection of the four metal ions, respectively. Such cost-effective detecting systems may provide a potential application for quantitative determination of metal ions in real water environmental samples. Hindawi 2019-11-03 /pmc/articles/PMC6925722/ /pubmed/31885591 http://dx.doi.org/10.1155/2019/5416963 Text en Copyright © 2019 Kai Sun et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Sun, Kai
Liu, Qingzhu
Zhu, Rui
Liu, Qi
Li, Shunyao
Si, Youbin
Huang, Qingguo
Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water
title Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water
title_full Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water
title_fullStr Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water
title_full_unstemmed Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water
title_short Oxidase-Like Catalytic Performance of Nano-MnO(2) and Its Potential Application for Metal Ions Detection in Water
title_sort oxidase-like catalytic performance of nano-mno(2) and its potential application for metal ions detection in water
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6925722/
https://www.ncbi.nlm.nih.gov/pubmed/31885591
http://dx.doi.org/10.1155/2019/5416963
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