Mesoporous germanium-rich chalcogenido frameworks with highly polarizable surfaces and relevance to gas separation

Gerasimos S. Armatas, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Mesoporous materials with tunable non-oxidic framework compositions can exhibit new kinds of functionality including internal surfaces with high polarizability. As the chemical and physical characteristics of the framework components can induce useful catalytic, absorption and optoelectronic features, the mesoporous structure can promote fast mass diffusion kinetics and size-selective transport of guest molecules. So far, synthetic efforts have resulted in mesoporous metal chalcogenides on using structure-directing moulds of soft or hard templates. These include ordered mesoporous II-VI semiconductors (such as CdS (refs 2,3), ZnS (ref.4) and CdTe (ref. 5)). Recently, template-free synthetic routes for high-surface-area chalcogenide aerogels have been reported. Here, we describe a novel kind of porous materials based on germanium-rich chalcogenide networks and 'soft' highly polarizable surfaces. We demonstrate that these materials can exhibit excellent selectivity for separating hydrogen from carbon dioxide and methane. These highly polarizable mesoporous structures have important implications for membrane-based gas separation process technologies including hydrogen purification.

Original languageEnglish
Pages (from-to)217-222
Number of pages6
JournalNature Materials
Volume8
Issue number3
DOIs
Publication statusPublished - Mar 2009

Fingerprint

Germanium
germanium
Gases
Hydrogen
templates
gases
Chalcogenides
Mesoporous materials
Aerogels
chalcogenides
aerogels
Methane
porous materials
hydrogen
purification
Carbon Dioxide
Optoelectronic devices
Purification
Porous materials
carbon dioxide

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics
  • Materials Science(all)
  • Chemistry(all)

Cite this

Mesoporous germanium-rich chalcogenido frameworks with highly polarizable surfaces and relevance to gas separation. / Armatas, Gerasimos S.; Kanatzidis, Mercouri G.

In: Nature Materials, Vol. 8, No. 3, 03.2009, p. 217-222.

Research output: Contribution to journalArticle

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