Postsynthetic acid modification of amino-tagged metal-organic frameworks: Structure-function relationship for catalytic 5-hydroxymethylfurfural synthesis

Yao Zhong, Cuiying Huang, Lijie Li, Qiang Deng, Jun Wang, Zheling Zeng, Shuguang Deng

Research output: Contribution to journalArticlepeer-review

Abstract

Developing an efficient and selective catalyst for the dehydration of fructose to 5-hydroxymethylfurfural (HMF) is significant for biomass conversion. Herein, a metal-organic framework (MOF) with acidity and strong hydrophobicity is first reported by the condensation of amino-tagged MOFs with mercapto carboxylic acids and subsequent oxidation. The hydrophobic acidic MOFs possess acid densities ranging from 0.2−1.0 mmol·g−1, H2O contact angles of 114°−125°, and specific surface areas above 260 m2·g−1. Compared to the methyl sulfo-functionalized MOF, the benzene sulfo-functionalized MOF with a strong hydrophobicity shows much higher activity and selectivity for the conversion of fructose to 5-hydroxymethylfurfural. In particular, 2.99% (mass) UiO-PhSO3H shows the best catalytic performance with a 90.4% HMF yield due to its suitable hydrophobicity and abundant acidic sites. Moreover, the catalyst shows great stability after recycling for 5 runs. This work provides an interesting design strategy for the preparation of hydrophobic acidic MOFs and shows the powerful synergistic effect of acidity and hydrophobicity.

Original languageEnglish (US)
Pages (from-to)245-252
Number of pages8
JournalChinese Journal of Chemical Engineering
Volume49
DOIs
StatePublished - Sep 2022
Externally publishedYes

Keywords

  • 5-Hydroxymethylfurfural
  • Acidity
  • Fructose
  • Hydrophobicity
  • Metal-organic framework

ASJC Scopus subject areas

  • Environmental Engineering
  • Biochemistry
  • Chemistry(all)
  • Chemical Engineering(all)

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