KFeSbTe3: A quaternary chalcogenide aerogel for preferential adsorption of polarizable hydrocarbons and gases

Type
Article
Authors
Ahmed, Ejaz
Rothenberger, Alexander
KAUST Department
Chemical Science Program
KAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
Date
2015
Permanent link to this record
http://hdl.handle.net/10754/563960

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Abstract
The first telluride-based quaternary aerogel KFeSbTe3 is synthesized by a sol-gel metathesis reaction between Fe(OAc)2 and K3SbTe3 in dimethyl formamide. The aerogel has an exceptionally large surface area 652 m2 g-1 which is amongst the highest reported for chalcogenide-based aerogels. This predominantly mesoporous material shows preferential adsorption for toluene vapors over cyclohexane or cyclopentane and CO2 over CH4 or H2. The remarkably high adsorption capacity for toluene (9.31 mmol g-1) and high selectivity for gases (CO2/H2: 121 and CO2/CH4: 75) suggest a potential use of such materials in adsorption-based separation processes for the effective purification of hydrocarbons and gases. © The Royal Society of Chemistry 2015.
Sponsors
We wish to thank Mr V. Q. Wang for TEM images and Dr M. N. Hedhili for XPS measurements. This research was supported by the King Abdullah University of Science and Technology (KAUST) baseline funding.
Publisher
Royal Society of Chemistry (RSC)
Journal
J. Mater. Chem. A
DOI
10.1039/c4ta06957a
Collections
Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)