Oxidase-Like Catalytic Performance of Nano-MnO2 and Its Potential Application for Metal Ions Detection in Water
Joint Authors
Sun, Kai
Liu, Qingzhu
Zhu, Rui
Liu, Qi
Li, Shunyao
Si, Youbin
Huang, Qingguo
Source
International Journal of Analytical Chemistry
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-11-03
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
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-MnO2 and its sensitivity to the presence of metal ions, and particularly, the use of MnO2 nanozyme to potentially detect Cu2+, Zn2+, Mn2+, and Fe2+ in water.
The results indicated the oxidase-like activity of nano-MnO2 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 Cu2+ and Mn2+ heightened the oxidase-mimicking activity of nano-MnO2 at 25°C and pH 3.8, showing that Cu2+ and Mn2+ could modify the reactive sites of nano-MnO2 surface to ameliorate its catalytic activity, while the activity of MnO2 nanozyme in systems with Zn2+ and Fe2+ was impeded probably because of the strong affinity of Zn2+ and Fe2+ toward nano-MnO2 surface.
Based on these effects, we designed a procedure to use MnO2 nanozyme to, respectively, detect Cu2+, Zn2+, Mn2+, and Fe2+ in the real water samples.
MnO2 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.
American Psychological Association (APA)
Sun, Kai& Liu, Qingzhu& Zhu, Rui& Liu, Qi& Li, Shunyao& Si, Youbin…[et al.]. 2019. Oxidase-Like Catalytic Performance of Nano-MnO2 and Its Potential Application for Metal Ions Detection in Water. International Journal of Analytical Chemistry،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1155915
Modern Language Association (MLA)
Sun, Kai…[et al.]. Oxidase-Like Catalytic Performance of Nano-MnO2 and Its Potential Application for Metal Ions Detection in Water. International Journal of Analytical Chemistry No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1155915
American Medical Association (AMA)
Sun, Kai& Liu, Qingzhu& Zhu, Rui& Liu, Qi& Li, Shunyao& Si, Youbin…[et al.]. Oxidase-Like Catalytic Performance of Nano-MnO2 and Its Potential Application for Metal Ions Detection in Water. International Journal of Analytical Chemistry. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1155915
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1155915