ZIF-derived porous carbon nanofibers for high-efficiency capacitive deionization

GAO Lijun1 BAI Silin1 LIANG Sucen1 MU Ye1 DONG Qiang1 HU Chao1

(1.College of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China 710049)
【Knowledge Link】electrospinning

【Abstract】As an environmentally-friendly and energy-saving desalination technology, capacitive deionization (CDI) is becoming an important desalination technology to replace reverse osmosis desalination and electrodialysis desalination. Carbon-based materials have been applied as promising CDI electrodes. However, most of them are powdered and binders are inevitably employed in the process of electrode fabrication, which causes a decline in electrosorption ability. Herein, monolithic porous carbon nanofibers with a flexible structure were synthesized by electrospinning and carbonizing the mixture of zeolitic imidazolate frameworks (ZIFs) and polyacrylonitrile (PAN). Due to the hierarchical porous structure and hydrophilicity, the as-synthesized porous carbon nanofibers exhibit a great salt adsorption capacity of 19.92 mg/g in 500 mg/L NaCl solution under the voltage of 1.2 V, which is over two times that of pristine carbon nanofibers.

【Keywords】 capacitive deionization; carbon nanofibers; electrospinning; desalination; electrochemistry; adsorption;

【DOI】

【Funds】 National Natural Science Foundation of China (51702254) Natural Science Foundation of Shaanxi Province (2017JQ5027) Fundamental Research Funds for the Central Universities (xjj2017083)

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(Translated by LIU YS)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 71, No. 06, Pages 2760-2767

June 2020

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Article Outline

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Abstract

  • Introduction
  • 1 Experimental materials and methods
  • 2 Results and discussion
  • 3 Conclusion
  • References