Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement

doi:10.1021/acsami.9b19964

GIEC OpenIR

	Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement
	James, Joshua B.1; Lang, Lin1,2 ; Meng, Lie 1; Lin, Jerry Y. S.1
	2020-01-22
发表期刊	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
卷号	12 期号:3 页码:3893-3902
通讯作者	Lin, Jerry Y. S.(jerry.lin@asu.edu)
摘要	The ability to tailor the pore structure of metal- organic framework (MOF) membranes enables synthesis of new or modified MOF membranes with enhanced separation characteristics. This work employs a modified version of solvent-assisted ligand exchange, termed membrane surface ligand exchange (MSLE), to modify the pore structure of zeolitic imidazolate framework-8 (ZIF-8) membranes. This paper is the first to perform a time-based, ex situ characterization and gas permeation study of ZIF-8 MSLE with 5,6-DBIM (DBIM, dimethylbenzimidazole) to effectively narrow the ZIF-8 pores, enhance light hydrocarbon gas-phase separations, and give insight into the exchange mechanism with respect to time and temperature. The results show that relatively fast exchange kinetics occur mainly at the outer surface of the ZIF-8 membrane during the initial 30 min of exchange and enables significant (40-70%) increases in propylene/propane selectivity with minimal (10-20%) propylene permeance losses for the modified ZIF-8 membranes. We postulate as the reaction time proceeds, the ligand-exchange rate slows as the DBIM linker diffuses into the ZIF-8 membrane beyond the external surface, exchanges with the original linker, disrupts the original framework's crystallinity, and then increases long-range order/crystallinity as the reaction proceeds. The H-2/C-2 separation factor increases with increased 5,6-DBIM content in the ZIF-8 framework which is facilitated by increased MSLE time and reaction temperature.
关键词	ZIF-8 membranes gas separation ligand-exchange modification propane-propylene separation MOF membranes
DOI	10.1021/acsami.9b19964
关键词[WOS]	ZEOLITIC IMIDAZOLATE FRAMEWORKS ; THERMAL-STABILITY ; ADSORPTION ; MIXTURES ; SINGLE
收录类别	SCI
语种	英语
资助项目	National Science Foundation[CBET-1511005]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
项目资助者	National Science Foundation
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000509428300062
出版者	AMER CHEMICAL SOC
引用统计	被引频次：49[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/26418
专题	中国科学院广州能源研究所
通讯作者	Lin, Jerry Y. S.
作者单位	1.Arizona State Univ, Tempe, AZ 85287 USA 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	James, Joshua B.,Lang, Lin,Meng, Lie,et al. Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(3):3893-3902.
APA	James, Joshua B.,Lang, Lin,Meng, Lie,&Lin, Jerry Y. S..(2020).Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement.ACS APPLIED MATERIALS & INTERFACES,12(3),3893-3902.
MLA	James, Joshua B.,et al."Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement".ACS APPLIED MATERIALS & INTERFACES 12.3(2020):3893-3902.