Benzenesulfonic acid-grafted UIO-66 with improved hydrophobicity as a stable Brønsted acid catalyst

Zongliang Kou, Guanlun Sun, Qiuyan Ding, Hong Li, Xin Gao, Xiaolei Fan, Xiaoxia Ou, Qinhe Pan

Research output: Journal PublicationArticlepeer-review


Hydrothermal and catalytic stability of UIO-66 MOFs with defective structures are critical aspects to be considered in their catalytic applications, especially under the conditions involving water, moisture and/or heat. Here, we report a facile strategy to introduce the macromolecular acid group to UIO-66 to improve the stability of the resulting UIO-66—PhSO3H MOF in aqueous phase catalysis. In detail, UIO-66—PhSO3H was obtained by grafting benzenesulfonic acid on the surface of the pristine UIO-66 to introduce the hydrophobicity, as well as the Brønsted acidity, then assessed using catalytic hydrolysis of cyclohexyl acetate (to cyclohexanol) in water. The introduction of hydrophobic molecules to UIO-66 could prevent the material from being attacked by hydroxyl polar molecules effectively, explaining its good structural stability during catalysis. UIO-66—PhSO3H promoted the conversion of cyclohexyl acetate at ca. 87%, and its activity and textural properties were basically intact after the cyclic stability tests. The facile modification strategy can improve the hydrothermal stability of UIO-66 significantly, which can expand its catalytic applications in aqueous systems.[Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)1389-1398
Number of pages10
JournalFrontiers of Chemical Science and Engineering
Issue number10
Publication statusPublished - Oct 2023


  • Brønsted acidity
  • UIO-66
  • hydrolysis of cyclohexyl acetate
  • hydrophobicity
  • metal—organic frameworks (MOFs)

ASJC Scopus subject areas

  • General Chemical Engineering


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