Aqueous solution synthesis of ZIF-8 films on a porous nylon substrate by contra-diffusion method

Ming He; Jianfeng Yao; Lunxi Li; Zhaoxiang Zhong; Fanyan Chen; Huanting Wang

doi:10.1016/j.micromeso.2013.05.015

Aqueous solution synthesis of ZIF-8 films on a porous nylon substrate by contra-diffusion method

Ming He, Jianfeng Yao, Lunxi Li, Zhaoxiang Zhong, Fanyan Chen, Huanting Wang

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

ZIF-8 films were prepared on both sides of nylon membrane in aqueous solutions using a stoichiometric ratio of Zn²⁺ and 2-methylimidazole (hmim) by a contra-diffusion method. Both ammonium hydroxide solution and porous nylon membrane play a crucial role in promoting ZIF-8 crystallization and film formation. Ammonium hydroxide solution added in the hmim solution deprotonates hmim, and the nylon membrane separates the Zn²⁺ and hmim aqueous solutions with different diffusion rates through its pores, leading to appropriate concentration gradients of hmim and zinc nitrate required for ZIF-8 nucleation and growth. The synthesis conditions were systematically investigated. ZIF-8 films prepared with a Zn²⁺:hmim:NH4+ molar ratio of 1:2:32 at room temperature for 24 h exhibited an intergrown ZIF-8 layer on hmim side with a thickness of ca. 2.5 μm, and gas permeation confirmed the film was continuous and compact with a H₂/N₂ ideal selectivity of 4.6.

Original language	English
Pages (from-to)	10-16
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	179
DOIs	https://doi.org/10.1016/j.micromeso.2013.05.015
State	Published - 2013
Externally published	Yes

Keywords

Aqueous solution
Contra-diffusion
Nylon membrane
Synthesis
ZIF-8 film

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10.1016/j.micromeso.2013.05.015

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title = "Aqueous solution synthesis of ZIF-8 films on a porous nylon substrate by contra-diffusion method",

abstract = "ZIF-8 films were prepared on both sides of nylon membrane in aqueous solutions using a stoichiometric ratio of Zn2+ and 2-methylimidazole (hmim) by a contra-diffusion method. Both ammonium hydroxide solution and porous nylon membrane play a crucial role in promoting ZIF-8 crystallization and film formation. Ammonium hydroxide solution added in the hmim solution deprotonates hmim, and the nylon membrane separates the Zn2+ and hmim aqueous solutions with different diffusion rates through its pores, leading to appropriate concentration gradients of hmim and zinc nitrate required for ZIF-8 nucleation and growth. The synthesis conditions were systematically investigated. ZIF-8 films prepared with a Zn2+:hmim:NH4+ molar ratio of 1:2:32 at room temperature for 24 h exhibited an intergrown ZIF-8 layer on hmim side with a thickness of ca. 2.5 μm, and gas permeation confirmed the film was continuous and compact with a H2/N2 ideal selectivity of 4.6.",

keywords = "Aqueous solution, Contra-diffusion, Nylon membrane, Synthesis, ZIF-8 film",

author = "Ming He and Jianfeng Yao and Lunxi Li and Zhaoxiang Zhong and Fanyan Chen and Huanting Wang",

year = "2013",

doi = "10.1016/j.micromeso.2013.05.015",

language = "英语",

volume = "179",

pages = "10--16",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Aqueous solution synthesis of ZIF-8 films on a porous nylon substrate by contra-diffusion method

AU - He, Ming

AU - Yao, Jianfeng

AU - Li, Lunxi

AU - Zhong, Zhaoxiang

AU - Chen, Fanyan

AU - Wang, Huanting

PY - 2013

Y1 - 2013

N2 - ZIF-8 films were prepared on both sides of nylon membrane in aqueous solutions using a stoichiometric ratio of Zn2+ and 2-methylimidazole (hmim) by a contra-diffusion method. Both ammonium hydroxide solution and porous nylon membrane play a crucial role in promoting ZIF-8 crystallization and film formation. Ammonium hydroxide solution added in the hmim solution deprotonates hmim, and the nylon membrane separates the Zn2+ and hmim aqueous solutions with different diffusion rates through its pores, leading to appropriate concentration gradients of hmim and zinc nitrate required for ZIF-8 nucleation and growth. The synthesis conditions were systematically investigated. ZIF-8 films prepared with a Zn2+:hmim:NH4+ molar ratio of 1:2:32 at room temperature for 24 h exhibited an intergrown ZIF-8 layer on hmim side with a thickness of ca. 2.5 μm, and gas permeation confirmed the film was continuous and compact with a H2/N2 ideal selectivity of 4.6.

AB - ZIF-8 films were prepared on both sides of nylon membrane in aqueous solutions using a stoichiometric ratio of Zn2+ and 2-methylimidazole (hmim) by a contra-diffusion method. Both ammonium hydroxide solution and porous nylon membrane play a crucial role in promoting ZIF-8 crystallization and film formation. Ammonium hydroxide solution added in the hmim solution deprotonates hmim, and the nylon membrane separates the Zn2+ and hmim aqueous solutions with different diffusion rates through its pores, leading to appropriate concentration gradients of hmim and zinc nitrate required for ZIF-8 nucleation and growth. The synthesis conditions were systematically investigated. ZIF-8 films prepared with a Zn2+:hmim:NH4+ molar ratio of 1:2:32 at room temperature for 24 h exhibited an intergrown ZIF-8 layer on hmim side with a thickness of ca. 2.5 μm, and gas permeation confirmed the film was continuous and compact with a H2/N2 ideal selectivity of 4.6.

KW - Aqueous solution

KW - Contra-diffusion

KW - Nylon membrane

KW - Synthesis

KW - ZIF-8 film

UR - http://www.scopus.com/inward/record.url?scp=84879086819&partnerID=8YFLogxK

U2 - 10.1016/j.micromeso.2013.05.015

DO - 10.1016/j.micromeso.2013.05.015

M3 - 文章

AN - SCOPUS:84879086819

SN - 1387-1811

VL - 179

SP - 10

EP - 16

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Aqueous solution synthesis of ZIF-8 films on a porous nylon substrate by contra-diffusion method

Abstract

Keywords

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