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Transforming 3D CAU-10-H into 2D Materials with High Base Stability for Membrane Separation
Lu Guan1, Zhangjie Ma2, Xiangyu Guo1
1State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, P. R. China.
Chemistry, an Asian Journal
|August 20, 2021
Summary
Novel alkali-stabilized two-dimensional (2D) CACl-10 (180) nanomaterials were synthesized for gas separation membranes. These materials exhibit strong alkali stability and promising performance for methane/nitrogen separation.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Two-dimensional (2D) nanomaterials offer unique properties for gas separation membranes due to active sites and porosity.
- Developing alkali-stable materials is crucial for membrane durability in various chemical environments.
Purpose of the Study:
- To synthesize a novel alkali-stabilized 2D nanomaterial, CACl-10 (180), from 3D CAU-10-H.
- To investigate the alkali stability and gas separation performance of the new material.
Main Methods:
- Synthesis of 2D CACl-10 (180) via thermal decomposition of 3D CAU-10-H using 4-chloroisophthalic acid and aluminum nitrate nonahydrate.
- Evaluation of alkali stability by exposing the material to strong alkali solutions.
- Fabrication of mixed matrix membranes (PVAm-CACl-10 (180)/MPSf) for gas separation.
Main Results:
- Successfully synthesized novel 2D CACl-10 (180) with retained framework structure in strong alkali solutions.
- Demonstrated that halogen atoms influence alkali stability.
- Achieved a CH4 permeance of 1647.99 GPU and a CH4/N2 selectivity of 3.1 in the mixed matrix membrane.
Conclusions:
- 2D CACl-10 (180) exhibits excellent alkali stability.
- The developed membrane shows potential for efficient methane/nitrogen separation.
- This research highlights a promising new material for membrane separation processes.
