In situ modification of ZIF-67 with multi-sulfonated dyes for great enhanced methylene blue adsorption via synergistic effect

Yanfeng Liu, Duoyu Lin, Weiting Yang, Xueying An, Ahui Sun, Xiaolei Fan, Qinhe Pan

Research output: Journal PublicationArticlepeer-review

29 Citations (Scopus)

Abstract

It is essential mean to adsorptive remove organic pollutants such dyestuff for water remediation. Herein in situ modification of the classic metal-organic framework ZIF-67 with –SO3 groups was easily achieved by the efficient adsorption of multi-sulfonated dyes due to the coordinative interaction between the unoccupied Co(II) of ZIF-67 and –SO3 of the dyes. Interestingly, highly efficient synergistic absorption of multi-sulfonated dyes towards methylene blue (MB+) upon ZIF-67 was discovered for the first time. The improved adsorption capacity of ZIF-67 for MB+ in presence of cotton blue (CB) was measured with a record-high value of 5,857.9 mg/g. The underlying mechanism of the synergistic adsorption was probed, showing that, after the initial coordination between the –SO3 of the dyes and the unoccupied Co(II) of ZIF-67, the available –SO3 groups of multi-sulfonated dyes can interact with –N+(CH3)2 in MB+ and hence greatly improving the adsorption capacity of MB+.

Original languageEnglish
Article number110304
JournalMicroporous and Mesoporous Materials
Volume303
DOIs
Publication statusPublished - 15 Aug 2020
Externally publishedYes

Keywords

  • Metal-organic frameworks (MOFs)
  • Methylene blue
  • Multi-sulfonated dyes
  • Synergistic effect
  • ZIF-67

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials

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