Synthesis of highly c-oriented ZIF-69 membranes by secondary growth and their gas permeation properties

Handle URI:
http://hdl.handle.net/10754/561852
Title:
Synthesis of highly c-oriented ZIF-69 membranes by secondary growth and their gas permeation properties
Authors:
Liu, Yunyang; Zeng, Gaofeng; Pan, Yichang; Lai, Zhiping ( 0000-0001-9555-6009 )
Abstract:
A seeded growth procedure was successfully developed to synthesize highly c-oriented and well-intergrown zeolitic imidazolate framework-69 (ZIF-69) membranes on porous α-alumina substrates. The synthesis conditions were optimized both for seed preparation and for secondary growth. For seeding, a facile method was developed to prepare smaller and flat ZIF-69 microcrystals in order to make thin and c-oriented seed layers. While for secondary growth, a synthesis condition that favored the growth along the c-direction was chosen in order to form highly c-oriented ZIF-69 membranes after growth. As a result, the majority of ZIF-69 grains inside the membrane have their straight channels along the crystallographic c-axis aligned perpendicularly to the substrate surface. Such alignment was confirmed by both XRD and pole figure analysis. The mixture-gas separation studies that were carried out at room temperature and 1atm gave separation factors of 6.3, 5.0, 4.6 for CO2/N2, CO2/CO and CO2/CH4 respectively, and a permeance of ∼1.0×10-7molm-2s-1Pa-1 for CO2 in almost all mixtures. Both the separation factor and permeance were better than the performance of the ZIF-69 membranes prepared by the in situ solvothermal method due to improvement in the membrane microstructure by the seeded growth method. © 2011 Elsevier B.V.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Sep-2011
DOI:
10.1016/j.memsci.2011.05.041
Type:
Article
ISSN:
03767388
Sponsors:
We acknowledge the financial support from KAUST distribution fund 31500/4000000066.
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLiu, Yunyangen
dc.contributor.authorZeng, Gaofengen
dc.contributor.authorPan, Yichangen
dc.contributor.authorLai, Zhipingen
dc.date.accessioned2015-08-03T09:32:29Zen
dc.date.available2015-08-03T09:32:29Zen
dc.date.issued2011-09en
dc.identifier.issn03767388en
dc.identifier.doi10.1016/j.memsci.2011.05.041en
dc.identifier.urihttp://hdl.handle.net/10754/561852en
dc.description.abstractA seeded growth procedure was successfully developed to synthesize highly c-oriented and well-intergrown zeolitic imidazolate framework-69 (ZIF-69) membranes on porous α-alumina substrates. The synthesis conditions were optimized both for seed preparation and for secondary growth. For seeding, a facile method was developed to prepare smaller and flat ZIF-69 microcrystals in order to make thin and c-oriented seed layers. While for secondary growth, a synthesis condition that favored the growth along the c-direction was chosen in order to form highly c-oriented ZIF-69 membranes after growth. As a result, the majority of ZIF-69 grains inside the membrane have their straight channels along the crystallographic c-axis aligned perpendicularly to the substrate surface. Such alignment was confirmed by both XRD and pole figure analysis. The mixture-gas separation studies that were carried out at room temperature and 1atm gave separation factors of 6.3, 5.0, 4.6 for CO2/N2, CO2/CO and CO2/CH4 respectively, and a permeance of ∼1.0×10-7molm-2s-1Pa-1 for CO2 in almost all mixtures. Both the separation factor and permeance were better than the performance of the ZIF-69 membranes prepared by the in situ solvothermal method due to improvement in the membrane microstructure by the seeded growth method. © 2011 Elsevier B.V.en
dc.description.sponsorshipWe acknowledge the financial support from KAUST distribution fund 31500/4000000066.en
dc.publisherElsevier BVen
dc.subjectGas permeationen
dc.subjectOrientationen
dc.subjectSecondary growthen
dc.subjectSeparationen
dc.subjectZIF-69 membranesen
dc.titleSynthesis of highly c-oriented ZIF-69 membranes by secondary growth and their gas permeation propertiesen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical and Biological Engineering Programen
dc.identifier.journalJournal of Membrane Scienceen
kaust.authorLiu, Yunyangen
kaust.authorZeng, Gaofengen
kaust.authorPan, Yichangen
kaust.authorLai, Zhipingen
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