Citation: Min Zhong, Meng Li, Zixi Fan, Wansong Huang, Huiru Hao, Zhixuan Xia, Qian Zhang, Haojin Peng, Yibo Zhang. Tuning the crystallinity of MnO₂ oxidant to achieve highly efficient pollutant degradation[J]. Chinese Chemical Letters, ;2023, 34(1): 107189. doi: 10.1016/j.cclet.2022.01.082 shu

Tuning the crystallinity of MnO₂ oxidant to achieve highly efficient pollutant degradation

Min Zhong ^a ,
Meng Li ^a ,
Zixi Fan ^b ,
Wansong Huang ^c ,
Huiru Hao ^d ,
Zhixuan Xia ^a ,
Qian Zhang ^{a, *,} ,
Haojin Peng ^a ,
Yibo Zhang ^a

a.
School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, China
b.
Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, United States
c.
Hubei Jianke International Construction Co., Ltd., Wuhan 430070, China
d.
School of Urban Construction, Wuchang Shouyi University, Wuhan 430064, China

Received Date: 11 October 2021
Revised Date: 13 November 2021
Accepted Date: 27 January 2022
Available Online: 3 February 2022

Figures(5)

Manganese dioxide (MnO₂), a commonly find oxidant in both natural environment and industrial application, plays a crucial role for various organic compound degradation. Tuning the MnO₂ crystal structure is a cost-effective strategy to boost the oxidation reactions, where the challenge remains due to lacking in-depth investigation of the crystal properties. Herein, MnO₂ with different crystalline structures (x-MnO₂) including α-, β- and δ- was prepared through the hydrothermal synthesis for a typical organic pollutant removal. The structural and degradation analysis indicated that the oxidation capacity was originated from Mn³⁺ and oxygen vacancies (OVs). The intrinsic relationships between oxidation performance and other physiochemical properties such as morphology and electrochemistry were thoroughly discussed, and positive correlations between oxidation capacity and electrochemical properties were found which eventually led to excellent oxidation performance via modulating the above-mentioned properties. Moreover, the K⁺ content was determined to be the most crucial role in manipulating the structure properties. This work offers a crystal-level insight into the relationship between the crystal structure and oxidative property, promoting rational design of highly efficient oxidant.
- MnO₂ polymorphs,
- Oxidation,
- Mn³⁺,
- Oxygen vacancy,
- Intrinsic relationship,
- K⁺content
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Tuning the crystallinity of MnO2 oxidant to achieve highly efficient pollutant degradation

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通讯作者: 陈斌, bchen63@163.com

Tuning the crystallinity of MnO₂ oxidant to achieve highly efficient pollutant degradation