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Converting metal-organic framework particles from hydrophilic to hydrophobic by an interfacial assembling route

Zhang, Fanyu; Sang, Xinxin; Tan, Xiuniang; Liu, Chengcheng; Zhang, Jianling; Luo, Tian; Liu, Lifei; Han, Buxing; Yang, Guanying; Binks, Bernard P.

Authors

Fanyu Zhang

Xinxin Sang

Xiuniang Tan

Chengcheng Liu

Jianling Zhang

Tian Luo

Lifei Liu

Buxing Han

Guanying Yang



Abstract

Here we propose to modify the hydrophilicity of metal-organic framework (MOF) particles by an interfacial assembling route, which is based on the surface-active nature of MOF particles. It was found that hydrophilic UiO-66-NH₂ particles can be converted to hydrophobic particles through an oil-water interfacial assembling route. The underlying mechanism for the conversion of UiO-66-NH₂ was investigated by X-ray photoelectron spectroscopy and FT-IR spectroscopy. It was revealed that the close assembly of UiO-66-NH₂ particles at the oil-water interface strengthens the coordination between organic ligands and metal ions, which results in a decrease in the proportion of hydrophilic groups on UiO-66-NH₂ particle surfaces. Hydrophobic UiO-66-NH₂ particles show improved adsorption capacity for dyes in organic solvents compared with pristine UiO-66-NH₂ particles. It is expected that the interfacial assembling route can be applied to the synthesis of different kinds of MOF materials with tunable hydrophilicity or hydrophobicity required for diverse applications.

Journal Article Type Article
Publication Date Oct 31, 2017
Journal Langmuir
Print ISSN 0743-7463
Electronic ISSN 1520-5827
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 33
Issue 43
Pages 12427-12433
APA6 Citation Zhang, F., Sang, X., Tan, X., Liu, C., Zhang, J., Luo, T., …Binks, B. P. (2017). Converting metal-organic framework particles from hydrophilic to hydrophobic by an interfacial assembling route. Langmuir : the ACS journal of surfaces and colloids, 33(43), 12427-12433. doi:10.1021/acs.langmuir.7b02365
DOI https://doi.org/10.1021/acs.langmuir.7b02365
Keywords Emulsion, Interfacial assembling, Metal-organic framework, Hydrophilic, Hydrophobic
Publisher URL http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b02365
Additional Information This is a description of an article published in Langmuir, 2017.

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir copyright © American Chemical Society after peer review and technical editing by the publisher.




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