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Nano Research

Article Title

Self-powered electrochemical system by combining Fenton reaction and active chlorine generation for organic contaminant treatment

Authors

Yawei Feng, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Kai Han, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Tao Jiang, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Zhenfeng Bian, Education Ministry Key and International Joint Lab of Resource Chemistry and Shanghai Key Lab of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
Xi Liang, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Xia Cao, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Hexing Li, School of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
Zhong Lin Wang, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

Keywords

self-powered electrochemistry, Fenton reaction, active chlorine, organic contaminant degradation

Abstract

Environmental deterioration, especially water pollution, is widely dispersed and could affect the quality of people’s life at large. Though the sewage treatment plants are constructed to meet the demands of cities, distributed treatment units are still in request for the supplementary of centralized purification beyond the range of plants. Electrochemical degradation can reduce organic pollution to some degree, but it has to be powered. Triboelectric nanogenerator (TENG) is a newly-invented technology for low-frequency mechanical energy harvesting. Here, by integrating a rotary TENG (R-TENG) as electric power source with an electrochemical cell containing a modified graphite felt cathode for hydrogen peroxide (H2O2) along with hydroxyl radical (•OH) generation by Fenton reaction and a platinum sheet anode for active chlorine generation, a self-powered electrochemical system (SPECS) was constructed. Under the driven of mechanical energy or wind flow, such SPECS can efficiently degrade dyes after power management in neutral condition without any O2 aeration. This work not only provides a guideline for optimizing self-powered electrochemical reaction, but also displays a strategy based on the conversion from distributed mechanical energy to chemical energy for environmental remediation.

Graphical Abstract

Publisher

Tsinghua University Press

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