Hierarchical porous induced competent removal of low concentration azo dye molecules by generating a leachy crystalline structure H-MIL-53(Fe)

Tao Feng, Jean Pierre Bavumiragira, Mumbi Anne Wambui, Daniel Manaye Kabtamu, Krisztina László, Ying Wang, Fengting Li

Research output: Contribution to journalArticle

Abstract

The development in technology of synthetic azo dyes, has led to excessive water resources pollution. Even at lower concentration they can impart the quality of water and human life. Herein, we have developed a novel synthesis strategy via introducing salicylic acid (SA) for the synthesis of a leachy crystalline material H-MIL-53(Fe) with hierarchical pores (HP) and exposed coordination unsaturated sites (CUS), which had higher surface area and larger pore volume than the as synthesized MIL-53(Fe). Due to these characteristics, H-MIL-53(Fe) was competent removal of orange G (OG, one of the frequently used azo dyes) with equilibrium in 300 min and the maximum adsorption capacity of 163.9 mg/g. The adsorption mechanism of OG onto H-MIL-53(Fe) was mostly based on electrostatic attraction between CUS of H-MIL-53(Fe) along with HP as active species to OG diffusion and bind. By comparing H-MIL-53(Fe) with other adsorbents for OG adsorption, it is undoubtedly that H-MIL-53 (Fe) can be used as a promising adsorbent for OG removal from aqueous solutions.

Original languageEnglish
JournalChinese Chemical Letters
DOIs
Publication statusAccepted/In press - Jan 1 2020

Keywords

  • Adsorption
  • H-MIL-53(Fe)
  • Leachy crystalline
  • Orange G removal
  • Salicylic acid

ASJC Scopus subject areas

  • Chemistry(all)

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