纳米片
膜
材料科学
聚合物
多孔性
气体分离
化学工程
拉曼光谱
堆栈(抽象数据类型)
选择性
金属有机骨架
纳米技术
吸附
化学
有机化学
计算机科学
复合材料
光学
物理
工程类
催化作用
生物化学
程序设计语言
作者
Jingmeng Wan,Mengjie Nian,Chao Yang,Kai Ge,Junjie Liu,Zhiquan Chen,Jingui Duan,Wanqin Jin
标识
DOI:10.1016/j.memsci.2021.119991
摘要
Mixed matrix membranes (MMMs) incorporating porous materials received extensive attention for applications of gas separation, but the one shows significant high permeability and increased selectivity is rare. Here, we report a strategy of interface regulation in two groups of MMMs via formed H-bonding by a newly designed and ultrathin metal organic framework nanosheet (MOFN). The chemically stable MOFN (thickness: 5–8 nm) with lamellae of micrometre lateral dimensions was prepared from [Hf6] cluster and tricarboxylate ligand, where the capping molecule of formic acid coordinates with Hf4+ ion as H-bonding donor toward incorporated polymers and also acts as an anisotropic regulator for MOFN growth. The well-distributed MOFN in two polymers shows sharply promoted CO2 permeability (720 GPU and 2085 GPU), as well as enhanced separation factor, over wide pressure and temperature ranges that are suitable for CO2 capture from natural gas. This is because the H-bonding regulated polymer-MOFN alignments lead to contractile channel and abundant porosity, validated by Raman mapping and positron annihilation lifetime spectroscopy. This work not only gives rise two candidate membranes for selective CO2 removal from naturals gas, but also, more prospectively, deliveries a design philosophy for construction of advanced MMMs.
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