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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)...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi
2019
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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. |
format | Online Article Text |
id | pubmed-6925722 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
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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