Creation of mesoporous defects in a microporous metal-organic framework by an acetic acid-fragmented linker co-assembly and its remarkable effects on methane uptake

Seo Yul Kim, Ah Reum Kim, Jung Woon Yoon, Hyun Jong Kim, Youn-Sang Bae

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20 Citations (Scopus)

Abstract

We propose for the first time an acetic acid (AcOH)-fragmented linker co-assembly strategy to create mesoporous defects in a microporous metal–organic framework (MOF), HKUST-1. By using various methods, including 1H NMR, FT-IR and XPS, we confirmed the successful co-assembly of AcOH fragments into the HKUST-1 structure. The prepared AcOH-fragmented HKUST-1 materials showed improved methane uptake (13% higher storage capacity at 65 bar and 16% higher deliverable capacity between 65 bar and 5 bar) and greatly increased surface areas (from 1787 to 2396 m2/g) and pore volumes (from 0.77 to 1.20 cc/g) compared to the parent HKUST-1. This is remarkable because HKUST-1 is considered to be one of the most promising materials for methane storage. Furthermore, we propose possible scenarios of defect formation in the AcOH-fragmented HKUST-1 materials from simulations of several hypothetical structures. This AcOH-fragmented linker co-assembly strategy could be compatible with a large number of carboxylate-based MOFs.

Original languageEnglish
Pages (from-to)94-100
Number of pages7
JournalChemical Engineering Journal
Volume335
DOIs
Publication statusPublished - 2018 Mar 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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