Functionalized Metal-Organic Frameworks for the Efficient Removal of Low Concentrations of Ammonia

Libo Li; Yong Wang; Jiangfeng Yang; Yang Chen; Jinping Li

doi:10.1002/cplu.201500445

Functionalized Metal-Organic Frameworks for the Efficient Removal of Low Concentrations of Ammonia

Chempluschem. 2016 Feb;81(2):222-228. doi: 10.1002/cplu.201500445. Epub 2015 Nov 9.

Authors

Libo Li¹, Yong Wang¹, Jiangfeng Yang¹, Yang Chen¹, Jinping Li¹

Affiliation

¹ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, P. R. China.

PMID: 31968762
DOI: 10.1002/cplu.201500445

Abstract

The excellent ammonia adsorption properties of [Cu(bpy)₂ (OTf)₂ ]_n (ELM-12; bpy=4,4'-bipyridine, OTf=trifluoromethanesulfonate) make it unique for the removal of ammonia at low concentrations, but its instability under humid conditions restrict its practical applications. Herein, a functionalized ELM-12@PDMS (PDMS=polydimethylsiloxane) composite was prepared by coating a nanoscale PDMS layer on the ELM-12 surface, which significantly increased its hydrophobicity. The dynamic ammonia adsorption properties of ELM-12 and ELM-12@PDMS were explored by means of kinetic breakthrough measurements under dry and humid conditions. ELM-12@PDMS can effectively capture ammonia at 100 ppm when maintained under 80 % relative humidity, which makes it promising for real applications.

Keywords: adsorption; ammonia; humidity; metal-organic frameworks; thin films.

Abstract

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