Work

Fabrication of defect-free MIL-96 membrane via aluminum isopropoxide gel layer towards exceptional H2/CO2 separation

Year: 2025

Type: article

Abstract: A novel approach was developed to fabricate defect-free MIL-96 membranes on an α-Al 2 O 3 support by combining aluminum isopropoxide coating with mixed-solvent regulation. The aluminum isopropoxide gel on the support functions as an active Al source, directing MIL-96 crystal nucleation and growth. A subsequent secondary crystallization can produce a well-intergrown MIL-96 membrane. Here, the gel coating inhibits the preferential crystallization of MIL-96 particles in the support pores, optimizing the microstructure and diminishing inter-crystal defects. By accurately adjusting the formic acid to N-methylformamide ratio in synthesis solution, a balance between membrane crystallinity and formation is achieved. Membrane separation property evaluation revealed an outstanding H 2 permeance of 1800 GPU and an H 2 /CO 2 separation factor of over 24.0, outperforming some advanced polycrystalline MOF membranes. This approach provides a potentially cost-efficient method for the large-scale preparation of MIL-96 membranes, holding great potential for practical applications in membrane separation.

Source: Chemical Engineering Science

DOI: 10.1016/j.ces.2025.121600

Authors: Qian Yu, Bilin Liang, Siqi Jia, Fang Li, Qiming Li

Institution: Liaoning Shihua University

Language: English

Topic: Membrane Separation and Gas Transport

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,050

Funders: National Natural Science Foundation of China, Department of Education of Liaoning Province, Department of Science and Technology of Liaoning Province