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Updated: Dec 24, 2025
Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Etched ZIF-8 as a Filler in Mixed-Matrix Membranes for Enhanced CO2 /N2 Separation
Yichen Zhou1, Mingmin Jia1, Xiongfei Zhang1
1College of Chemical Engineering, Jiangsu Key Laboratory for the Chemistry & Utilization of Agricultural and Forest Biomass, Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University Department, Nanjing, Jiangsu, 210037, P.R. China.
Abstract:
Zeolite ZIF-8 has been etched with acid to form microporous ZIF-8-E crystals. These were then introduced into a polyethersulfone (PES) membrane matrix to enhance its CO2 /N2 separation performance. Open through pores of size about 100 nm formed in the ZIF-8 crystals allow the ingrowth of polyethersulfone chains, ensuring a reduction in the number of nonselective voids, thereby achieving better interaction between ZIF-8-E and PES. As a result, the CO2 /N2 separation performance of the ZIF-8-E/PES membrane increased significantly, showing a CO2 permeability of 15.7 Barrer and a CO2 /N2 ideal selectivity of 6.5.
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