Thermal Shrinkage Behavior of Metal–Organic Frameworks

Ting Pan, Yu Shen, Peng Wu, Zhida Gu, Bing Zheng, Jiansheng Wu, Sheng Li, Yu Fu, Weina Zhang, Fengwei Huo

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Thermal treatment of metal–organic frameworks (MOFs) as a post-treatment approach has grown in popularity and resulted in various MOF-derived materials. However, the widely used extreme thermolytic conditions (usually above 500 °C) lead to degradation in the well-defined MOFs intrinsic properties. This work demonstrates that MIL-101 calcined at medium-temperature range (200–280 °C) partially breaks the coordination bonds that can introduce more accessible active sites, exhibiting a 10-fold increase in oxidation activity while retaining its intrinsic structure and porosity. Another fascinating feature of MIL-101 calcined in this temperature range is their temperature-dependent shrinkage behavior, which is also found in many other types of MOFs. Based on different shrinkage ratios of various MOFs, yolk–shell MOFs@MOFs structures can be constructed through nonsacrificial template method. Overall, the structural and morphological evolution process of MOFs treated in the medium-temperature range can open new horizons to develop efficient MOFs catalysts and design complex structures.

Original languageEnglish
Article number2001389
JournalAdvanced Functional Materials
Volume30
Issue number34
DOIs
StatePublished - 1 Aug 2020

Keywords

  • medium temperature
  • metal–organic frameworks
  • size shrinkage
  • thermal treatment
  • yolk–shell structures

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