Understanding Solvothermal Growth of Metal-Organic Framework Colloids for CO2Capture Applications

Pei Fang Hsieh, Zhi Xuan Law, Chia Her Lin, De Hao Tsai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A quantitative study of the synthesis of metal-organic framework (MOF) colloids via a solvothermal growth process was demonstrated using electrospray-differential mobility analysis (ES-DMA), a gas-phase electrophoresis approach. HKUST-1, a copper-based MOF (Cu-MOF), was selected as the representative MOF of the study. The effects of the synthetic parameters, including ligand concentration (CBTC), synthetic temperature (Ts), and synthetic time (ts) versus material properties of the Cu-MOF, were successfully characterized based on the mobility size distributions measured by ES-DMA. The results show that the mobility size of Cu-MOF was proportional to Ts, ts, and CBTCduring the solvothermal growth. X-ray diffraction and Brunauer-Emmett-Teller analyses were employed complementarily to the ES-DMA, confirming that the increase in mobility size of Cu-MOF was correlated to the increase in crystallinity (i.e., larger specific surface area and crystallite size). The results of CO2pulse adsorption show that the synthesized Cu-MOF possessed a good CO2adsorption ability under 1 atm, 35 °C, and the cumulative amount of CO2uptake was proportional to the measured mobility size of Cu-MOF. The work provides a proof of concept for the controlled synthesis of MOF colloids with the support of gas-phase electrophoretic analysis, and the quantitative methodology is useful for the development of MOF-based applications in CO2capture and utilization.

Original languageEnglish
Pages (from-to)4415-4424
Number of pages10
JournalLangmuir
Volume38
Issue number14
DOIs
Publication statusPublished - 2022 Apr 12

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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