The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry
Abstract Nanostructured manganese oxides, e.g. MnO2, have shown laccase-like catalytic activities, and are thus promising for pollutant oxidation in wastewater treatment. We have systematically compared the laccase-like reactivity of manganese oxide nanomaterials of different crystallinity, includin...
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doaj-9a72ea0da6ed443cb0b94da703f971d62020-12-08T01:43:51ZengNature Publishing GroupScientific Reports2045-23222017-08-017111010.1038/s41598-017-07913-2The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetryXinghao Wang0Jiaoqin Liu1Ruijuan Qu2Zunyao Wang3Qingguo Huang4State Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing UniversityState Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing UniversityState Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing UniversityState Key Laboratory of Pollution Control and Resources Reuses, School of the Environment, Nanjing UniversityCollege of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of GeorgiaAbstract Nanostructured manganese oxides, e.g. MnO2, have shown laccase-like catalytic activities, and are thus promising for pollutant oxidation in wastewater treatment. We have systematically compared the laccase-like reactivity of manganese oxide nanomaterials of different crystallinity, including α-, β-, γ-, δ-, and ɛ-MnO2, and Mn3O4, with 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulfonate) (ABTS) and 17β-estradiol (E2) as the probing substrates. The reaction rate behaviors were examined with regard to substrate oxidation and oxygen reduction to evaluate the laccase-like catalysis of the materials, among which γ-MnO2 exhibits the best performance. Cyclic voltammetry (CV) was employed to assess the six MnOx nanomaterials, and the results correlate well with their laccase-like catalytic activities. The findings help understand the mechanisms of and the factors controlling the laccase-like reactivity of different manganese oxides nanomaterials, and provide a basis for future design and application of MnOx-based catalysts.https://doi.org/10.1038/s41598-017-07913-2 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xinghao Wang Jiaoqin Liu Ruijuan Qu Zunyao Wang Qingguo Huang |
spellingShingle |
Xinghao Wang Jiaoqin Liu Ruijuan Qu Zunyao Wang Qingguo Huang The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry Scientific Reports |
author_facet |
Xinghao Wang Jiaoqin Liu Ruijuan Qu Zunyao Wang Qingguo Huang |
author_sort |
Xinghao Wang |
title |
The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry |
title_short |
The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry |
title_full |
The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry |
title_fullStr |
The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry |
title_full_unstemmed |
The laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry |
title_sort |
laccase-like reactivity of manganese oxide nanomaterials for pollutant conversion: rate analysis and cyclic voltammetry |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2017-08-01 |
description |
Abstract Nanostructured manganese oxides, e.g. MnO2, have shown laccase-like catalytic activities, and are thus promising for pollutant oxidation in wastewater treatment. We have systematically compared the laccase-like reactivity of manganese oxide nanomaterials of different crystallinity, including α-, β-, γ-, δ-, and ɛ-MnO2, and Mn3O4, with 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulfonate) (ABTS) and 17β-estradiol (E2) as the probing substrates. The reaction rate behaviors were examined with regard to substrate oxidation and oxygen reduction to evaluate the laccase-like catalysis of the materials, among which γ-MnO2 exhibits the best performance. Cyclic voltammetry (CV) was employed to assess the six MnOx nanomaterials, and the results correlate well with their laccase-like catalytic activities. The findings help understand the mechanisms of and the factors controlling the laccase-like reactivity of different manganese oxides nanomaterials, and provide a basis for future design and application of MnOx-based catalysts. |
url |
https://doi.org/10.1038/s41598-017-07913-2 |
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