Polydopamine-based synthesis of a zeolite imidazolate framework ZIF-100 membrane with high H₂/CO₂ selectivity

Abstract

A highly permselective ZIF-100 molecular sieve membrane has been prepared on a polydopamine (PDA)-modified support. Attributed to the formation of strong covalent and non-covalent bonds between PDA and ZIF-100, the ZIF-100 nutrients are attracted and bound to the support surface, thus promoting the growth of well-intergrown and phase-pure ZIF-100 membranes. The developed ZIF-100 membranes show high H 2 /CO 2 selectivity due to the outstanding CO 2 adsorption capacity of ZIF-100.

On the molecular mechanisms for the H2/CO2 separation performance of zeolite imidazolate framework two-layered membranes

“…Caro et al have reported on the use of several ZIF-material supported membranes made of ZIF-95, 39 functionalized ZIF-90, 40 ZIF-7 (ref. 19) and ZIF-100 (ref. 41) for H 2 /CO 2 separation at working temperatures up to 325 °C.…”

Ionic liquid functionalized multi-walled carbon nanotubes/zeolitic imidazolate framework hybrid membranes for efficient H2/CO2 separation

“…22,34,39 As can be seen in Fig. S6, CNT@IL/ZIF-9 hybrid membrane obtained in this work can maintain the gas permeability and selectivity over 500 hours, showing superiority compared to the reported MOF membranes.…”

“…S8. 34 In conclusion, a novel zeolitic imidazolate framework (ZIF-9) hybrid membrane was grown on the porous α-Al 2 O 3 support covered with CNTs functionalized by ILs using heat treatment of 90 layer-by-layer deposition method. The hybrid membrane CNT@IL/ZIF-9 showed excellent gas separation performance for H 2 /CO 2 because of the cooperative effect of ZIFs, CNTs and ILs.…”

“…34,35 It can be seen from the PXRD pattern (Fig. 3) that crystal structure of ZIF-9 has not been destroyed when being covered by the CNT@IL layer.…”

Hydrogen separation through tailored dual phase membranes with nominal composition BaCe0.8Eu0.2O3-δ:Ce0.8Y0.2O2-δ at intermediate temperatures

“…Properties like high selectivity for H 2 , significant durability, mechanical and hydrothermal stability in reducing environments, as well as operating temperature ranges above 500 °C, make dense ceramic mixed proton-electronic conductors a promising alternative to precious metals and related alloys (Ag-Pd)12, polymers13, metal-organic frameworks (MOFs)1415, zeolite16 or other ceramic microporous materials1718.…”