A controlled synthesis strategy to enhance the CO2 adsorption capacity of MIL-88B type MOF crystallites by the crucial role of narrow micropores
Yurduşen, Aysu and Yürüm, Yuda (2019) A controlled synthesis strategy to enhance the CO2 adsorption capacity of MIL-88B type MOF crystallites by the crucial role of narrow micropores. Industrial & Engineering Chemistry Research, 58 (31). pp. 14058-14072. ISSN 0888-5885
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Official URL: http://dx.doi.org/10.1021/acs.iecr.9b01653
The present study reports a controlled synthesis strategy that enhances the CO2 adsorption capacity of MIL-88B-type MOF crystallites by the control of hierarchical pores via the Fe/BDC ratio and synthesis temperature. MIL-88B-type crystallites synthesized at different temperatures with different Fe/BDC ratios are investigated for their CO2 adsorption capacities. The crucial role of narrow micropores (pore sizes less than 1 nm) on CO2 adsorption capacity is shown. The highest CO2 uptake capacity of 5.58 wt % (at 1 bar and 298 K) is achieved by the MOF crystallites with a 400.4 m2/g BET surface area. This CO2 uptake capacity is greater than those of reported commercially available MOFs (MOF-5 CO2 uptake capacity, 4.5 wt %, and ZIF-8 CO2 uptake capacity, 4.3 wt %). By the formation of hierarchical pores and control of the textural mesoporosity via the Fe/BDC ratio and synthesis temperature, this research paves the way for the synthesis of MOFs with enhanced CO2 adsorption capacity.
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