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Synergistic effect and degradation mechanism on Fe-Ni/CNTs for removal of 2,4-dichlorophenol in aqueous solution

  • Yufeng Sun
  • Zongtang Liu
  • Zhenghao Fei
  • Changshun Li
  • Yuan Chun
  • Aimin ZhangEmail author
Research Article
  • 24 Downloads

Abstract

Fe-Ni bimetallic nanoparticles supported on CNTs (Fe-Ni/CNTs) were synthesized, characterized, and applied for removal of 2,4-dichlorophenol (2,4-DCP) in aqueous solution. The removal performance was enhanced drastically on Fe-Ni/CNTs with respect to monometallic Fe/CNTs. The synergistic effect between Fe-Ni nanoparticles and CNTs has been studied in detail. The research results indicated that the doping of Ni played an important role in promoting the catalytic degradation of 2,4-DCP. And the presence of CNTs not only could effectively reduce the aggregation of nanoparticles but also facilitate the mass transfer of 2,4-DCP and the formation of active atomic hydrogen during the catalytic process. In addition, the removal kinetics of 2,4-DCP by Fe-Ni/CNTs were in agreement with a pseudo-first-order model, and the rate constants were dependent on a number of factors including the initial concentration of 2,4-DCP, the dosage of Fe-Ni/CNTs, pH value of the solution, and doping amount of Ni. The degradation mechanism involved the adsorption by CNTs and catalytic reduction by Fe under the stimulating of Ni, and the preferred dechlorination followed the order of para-Cl > ortho-Cl. The study confirmed that Fe-Ni/CNTs had a potential to be a promising catalytic material for removal of chlorophenol and had a great prospect for practical application.

Keywords

Supported Fe-Ni nanoparticles CNTs 2,4-dichlorophenol Degradation Synergistic effect 

Notes

Funding Information

This work was financially supported by the National Natural Science Foundation of China (No.41877118 and 21573104), the Natural Science Foundation of Jiangsu Province of China (No.BK20181479), and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No.17KJB610013 and 17KJA610006).

Supplementary material

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yufeng Sun
    • 1
    • 2
  • Zongtang Liu
    • 2
  • Zhenghao Fei
    • 2
  • Changshun Li
    • 1
  • Yuan Chun
    • 1
  • Aimin Zhang
    • 1
    Email author
  1. 1.Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical EngineeringNanjing UniversityNanjingPeople’s Republic of China
  2. 2.School of Chemistry and Environmental EngineeringYancheng Teachers UniversityYanchengPeople’s Republic of China

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