Oxidative exfoliation of spent cathode carbon: A two-in-one strategy for its decontamination and high-valued application

Runze Chen; Yuran Chen; Xuemin Liang; Yapeng Kong; Yangyang Fan; Quan Liu; Zhenyu Yang; Feiying Tang; Johnny Muya Chabu; Maru Dessie Walle; Liqiang Wang

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Oxidative exfoliation of spent cathode carbon: A two-in-one strategy for its decontamination and high-valued application

Full Length Article | Updated：2026-01-06

- Oxidative exfoliation of spent cathode carbon: A two-in-one strategy for its decontamination and high-valued application
- Chinese Journal of Chemical Engineering Vol. 59, Issue 7, Pages: 262-269(2023)
- Affiliations：
  
  1. Henan Province Industrial Technology Research Institute of Resources and Materials, School of Material Science and Engineering, Zhengzhou University,Zhengzhou,China,450001
  2. College of Chemical Engineering, Zhengzhou University,Zhengzhou,China,450001
  3. College of Chemical Engineering, Xiangtan University,Xiangtan,China,411105
  4. Foshan Green Intelligent Manufacturing Research Institute of Xiangtan University,Foshan,China,528010
  5. Department of Chemistry, Faculty of Science, University of Lubumbashi, Lubumbashi, BP 1825, Democratic Republic of the Congo
  6. College of Science, Bahir Dar University, Bahir Dar 79,Ethiopia
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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Runze Chen, Yuran Chen, Xuemin Liang, Yapeng Kong, Yangyang Fan, Quan Liu, Zhenyu Yang, Feiying Tang, Johnny Muya Chabu, Maru Dessie Walle, Liqiang Wang. Oxidative exfoliation of spent cathode carbon: A two-in-one strategy for its decontamination and high-valued application[J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 262-269.
DOI：

Runze Chen, Yuran Chen, Xuemin Liang, Yapeng Kong, Yangyang Fan, Quan Liu, Zhenyu Yang, Feiying Tang, Johnny Muya Chabu, Maru Dessie Walle, Liqiang Wang. Oxidative exfoliation of spent cathode carbon: A two-in-one strategy for its decontamination and high-valued application[J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 262-269. DOI：

摘要

Abstract

Spent cathode carbon (SCC) from aluminum electrolysis is a potential graphite resource. However

full use of the SCC remains a challenge

since it contains many hazardous substances (

e.g.

fluoride salts

cyanides)

encapsulated within the thick carbon layers and thus posing serious environmental concerns. This work presents a chemical oxidative exfoliation route to achieve the recycling of SCC and the decontaminated SCC with high-valued graphene oxide (GO)-like carbon structures (SCC-GO) is applied as an excellent adsorbent for organic pollutants. Specifically

after the oxidative exfoliation

the embedded hazardous constituents are fully exposed

facilitating their subsequent removal by aqueous leaching. Moreover

benefiting from the enhanced specific surface areas along with abundant O-containing functional groups

the as-produced SCC-GO

shows an adsorption capacity as high as 347 mg·g

-1

when considering methylene blue as a pollutant model

which exceeds most of the recently reported carbon-based adsorbents. Our study provides a feasible solution for the efficient recycling of hazardous carbonaceous wastes.

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