Superior adsorption performance of metal-organic-frameworks derived magnetic cobalt-embedded carbon microrods for triphenylmethane dyes

Jian Ye, Lina Jin*, Xiaoshuang Zhao, Xinye Qian, Mingdong Dong

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

In this work, magnetic Co/C microrods were successfully synthesized using direct carbonization of [Co-3(BTC)(2)(H2O)(12)] precursors. After the carbonization, the original shape of the precursors was well maintained, while the magnetic Co nanoparticles were well dispersed in the carbon matrix. The Co/C microrods were used as adsorbents for the adsorption of methyl blue (MB), acid fuchsin (AF), malachite green (MG), rhodamine B (Rh B), methyl orange (MO) and methylene blue (MTB) from their aqueous solutions. The results show that Co/C microrods can selectively adsorb triphenylmethane (TPM) dyes, while the adsorption capacities are about 13960, 11,610 and 4893 mg/g for MB, AF and MG dyes, respectively. The adsorption mechanism can be attributed to pi-pi interaction forces between the sp(2) graphitic carbon in Co/C microrods and the triphenyl structure of dyes. In addition, the synthesized magnetic Co/C micro rods can be easily removed from water using magnetic separation, and subsequently, regenerated using ethanol treatment. (C) 2018 Published by Elsevier Inc.

Original languageEnglish
JournalJournal of Colloid and Interface Science
Volume536
Pages (from-to)483-492
Number of pages10
ISSN0021-9797
DOIs
Publication statusPublished - 15 Feb 2019

Keywords

  • Metal-organic frameworks
  • Magnetic
  • Carbon composites
  • Triphenylmethane dyes
  • Adsorption
  • HIGHLY EFFICIENT REMOVAL
  • MALACHITE GREEN
  • POROUS CARBON
  • WATER
  • NANOSTRUCTURES
  • NANOCOMPOSITE
  • NANOPARTICLES
  • COMPOSITES
  • NANOSHEETS

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