Cited by 193Aerogels and thermal insulationCarbon Dioxide Capture TechnologiesMesoporous Materials and Catalysis

Ion-Exchangeable Molybdenum Sulfide Porous Chalcogel: Gas Adsorption and Capture of Iodine and Mercury

Subrahmanyam, Kota S., Malliakas, Christos D., Sarma, Debajit, Armatas, Gerasimos S., Wu, Jinsong, Kanatzidis, Mercouri G.·2015·Journal of the American Chemical Society

Abstract

We report the synthesis of ion-exchangeable molybdenum sulfide chalcogel through an oxidative coupling process, using (NH4)2MoS4 and iodine. After supercritical drying, the MoS(x) amorphous aerogel shows a large surface area up to 370 m(2)/g with a broad range of pore sizes. X-ray photoelectron spectroscopic and pair distribution function analyses reveal that Mo(6+) species undergo reduction during network assembly to produce Mo(4+)-containing species where the chalcogel network consists of [Mo3S13] building blocks comprising triangular Mo metal clusters and S2(2-) units. The optical band gap of the brown-black chalcogel is ∼1.36 eV. The ammonium sites present in the molybdenum sulfide chalcogel network are ion-exchangeable with K(+) and Cs(+) ions. The molybdenum sulfide aerogel exhibits high adsorption selectivities for CO2 and C2H6 over H2 and CH4. The aerogel also possesses high affinity for iodine and mercury.

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Crossref · 10.1021/jacs.5b09110

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Authors
Subrahmanyam, K. S., Malliakas, C. D., Sarma, D., Armatas, G. S., Wu, J., & Kanatzidis, M. G.
Affiliations
  • Northwestern University (US)
  • University of Crete (GR)
Corresponding author
Kanatzidis, Mercouri G.
Venue
Journal of the American Chemical Society
Published
2015-10-22
Volume
137
Issue
43
Pages
13943-13948
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2232191890
Cited by
193
References
57
Citations by year
2026: 14 · 2025: 20 · 2024: 25 · 2023: 16 · 2022: 17 · 2021: 18 · 2020: 19 · 2019: 21 · 2018: 14 · 2017: 15 · 2016: 12 · 2015: 1
FWCI
6.23
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Office of Nuclear Energy
  • Indo-US Science and Technology Forum
  • Honeywell International Inc.
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Aerogels and thermal insulation
  • Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
  • Physical Sciences › Materials Science › Materials Chemistry › Mesoporous Materials and Catalysis
Keywords
molybdenum sulfide, porous aerogel, ion exchange, oxidative coupling, iodine adsorption, mercury adsorption, gas separation, CO2 adsorption, optical band gap, supercritical drying

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