title: Imparting surface hydrophobicity to metal-organic frameworks using a facile solution-immersion process to enhance water stability for CO2capture.
abstract: The water sensitivity of metal-organic frameworks (MOFs) poses a critical issue for their large-scale applications. One effective method to solve this is to provide MOFs with a hydrophobic surface. Herein, we develop a facile solution-immersion process to deposit a hydrophobic coating on the MOFs' external surface without blocking their intrinsic pores. The water contact angle of the surface hydrophobic (SH) MOFs is ∼146°. The hydrophobic coating not only greatly enhances MOFs' water stability but also provides durable protection against the attack of water molecules. When exposed to liquid water, the SH samples well retain their crystal structure, morphology, surface area and CO2uptake capacity. However, the as-synthesized (AS) samples nearly collapse and lose their porosity as well as CO2uptake capacity after the same exposure. This study opens up a new avenue for the MOFs' application of gas sorption in the presence of water.
authors.affiliation: School of Engineering, Lishui University, Lishui 323000, P.R. China. qianxukun@126.com and State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, P.R. China.
authors.forename: Xukun
authors.identifier: http://orcid.org/0000-0002-4856-5006
authors.initials: X
authors.lastname: Qian
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P.R. China.
authors.forename: Fuxing
authors.initials: F
authors.lastname: Sun
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, P.R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
authors.affiliation: School of Engineering, Lishui University, Lishui 323000, P.R. China. qianxukun@126.com.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Wu
authors.affiliation: School of Engineering, Lishui University, Lishui 323000, P.R. China. qianxukun@126.com.
authors.forename: Fei
authors.initials: F
authors.lastname: Xiao
authors.affiliation: School of Engineering, Lishui University, Lishui 323000, P.R. China. qianxukun@126.com.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P.R. China and Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P.R. China. zhugs100@nenu.edu.cn.
authors.forename: Guangshan
authors.initials: G
authors.lastname: Zhu