Preferential adsorption of volatile hydrocarbons on high surface area chalcogels KMBiTe3 (M = Cr, Zn, Fe)

Fatimah Edhaim*, Alexander Rothenberger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Three chalcogels KCrBiTe3, KZnBiTe3, and KFeBiTe3 were synthesized by the sol–gel metathesis route. K+ and the transition metal cations Cr2+, Zn2+ or Fe2+ connect [BiTe3]3− anions to form amorphous black compounds. Supercritical drying of the black gels produced porous materials with BET surface areas of 230 m2/g (KCrBiTe3), 450 m2/g (KZnBiTe3) and 514 m2/g (KFeBiTe3). The adsorption properties of the resulting chalcogenide aerogels or chalcogels have been studied using volatile organic hydrocarbons (VOCs) and gases as adsorptives. The results show preferential adsorption of toluene vapor over cyclohexane vapor. The adsorption capacity toward toluene is 5.02 mmol/g for KCrBiTe3, 5.58 mmol/g for KZnBiTe3 and 7.89 mmol/g for KFeBiTe3. Preferential adsorption of CO2 over CH4 or H2 was observed for the chalcogels: KCrBiTe3 (CO2/H2: 175, CO2/CH4: 50), KZnBiTe3 (CO2/H2: 180 and CO2/CH4: 60) and KFeBiTe3 (CO2/H2: 225 and CO2/CH4: 65).

Original languageEnglish (US)
Pages (from-to)654-663
Number of pages10
JournalAdvanced Powder Technology
Issue number3
StatePublished - Mar 2018

Bibliographical note

Publisher Copyright:
© 2017 The Society of Powder Technology Japan


  • Adsorption
  • Chalcogel
  • Gas separation
  • Hydrocarbon
  • Mesoporous

ASJC Scopus subject areas

  • Mechanics of Materials
  • General Chemical Engineering


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