Synthesis of hierarchical metal-organic frameworks in CO2 expanded solvent systems

Huan Doan, V. P. Ting, Bristol, Bath and NTU

Research output: Contribution to conferenceConference Posterpeer-review


In this study, a porous material HKUST-1 was synthesised using supercritical CO2 (scCO2) with reduced amounts of conventional solvents. This can help to reduce the environmental impact from solvent waste in conventional synthesis of porous materials. Resulting data show that with the presence of scCO2, HKUST-1 crystallites with hierarchical pore structure are formed. Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) showed that scCO2-expanded synthesis had an effect on the porosity of the structure. Macroporous faceted crystallites are seen in the sample synthesised under scCO2 in 24 hours, compared to the perfectly smooth faces of the conventionally-synthesised HKUST-1. A higher proportion of macropores with some mesopores can be seen after 48-hour synthesis in scCO2. A finely divided microstructure with networks of macro- and mesopores is seen in the material after 72 hours. Electron diffraction shows that the crystallites are single crystals with length scale of 51 nm.
Original languageEnglish
Publication statusPublished - Mar 2016
EventThe 39th British Zeolite Association Meeting - University of Bath, Bath, United Kingdom
Duration: 21 Mar 201623 Mar 2016
Conference number: 39


ConferenceThe 39th British Zeolite Association Meeting
Abbreviated titleBZA
Country/TerritoryUnited Kingdom


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