Cross‐Linking between Sodalite Nanoparticles and Graphene Oxide in Composite Membranes to Trigger High Gas Permeance, Selectivity, and Stability in Hydrogen Separation

作者：Hailing Guo, Guodong Kong, Ge Yang, Jia Pang, Zixi Kang, Shou Feng, Lei Zhao, Lili Fan, Liangkui Zhu, Aurélie Vicente, Peng Peng, Zifeng Yan, Daofeng Sun, Svetlana Mintova · 发表于：Angewandte Chemie International Edition · 年份：2020 · DOI：10.1002/anie.201915797 · 被引用次数：42 · 研究领域：Membrane Separation and Gas Transport、Membrane Separation Technologies、Graphene research and applications

Abstract Thin membranes (900 nm) were prepared by direct transformation of infiltrated amorphous precursor nanoparticles, impregnated in a graphene oxide (GO) matrix, into hydroxy sodalite (SOD) nanocrystals. The amorphous precursor particles rich in silanols (Si−OH) enhanced the interactions with the GO, thus leading to the formation of highly adhesive and stable SOD/GO membranes via strong bonding. The cross‐linking of SOD nanoparticles with the GO in the membranes promoted both the high gas permeance and enhanced selectivity towards H 2 from a mixture containing CO 2 and H 2 O. The SOD/GO membranes are moisture resistance and exhibit steady separation performance (H 2 permeance of about 4900 GPU and H 2 /CO 2 selectivity of 56, with no degradation in performance during the test of 50 h) at high temperature (200 °C) under water vapor (4 mol %).