Selective surfaces: High-surface-area zinc tin sulfide chalcogels

Youngtak Oh, Santanu Bag, Christos D. Malliakas, Mercouri G. Kanatzidis

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Porous zinc tin sulfide aerogel materials were constructed by metathesis reactions between Zn(acac)2•H2O and tetrahedral thiostannate cluster salts containing discrete [SnS4]4-, [Sn2S6]4-, and [Sn4S 10]4- units. Self-assembly reactions of the Zn 2+ linker and anionic thiostannate clusters yielded polymeric random Zn/Sn/S networks with gelation properties. Supercritical drying of the gels and solvent/counterion removal resulted in a metal sulfur framework. Zn 2SnxS2x+2 (x = 1, 2, 4) aerogels showed high surface areas (363-520 m2/g) and pore volumes (1.1-1.5 cm 3/g), and wide bandgap energies (2.8-3.2 eV). Scanning and transmission electron microscopy studies show the pores are micro- (d < 2 nm), meso- (2 nm < d < 50 nm), and macro- (d > 50 nm) regions. The zinc chalcogenide aerogels also possess high affinities toward soft heavy metals and reversible absorption of strong electron-accepting molecules.

Original languageEnglish
Pages (from-to)2447-2456
Number of pages10
JournalChemistry of Materials
Volume23
Issue number9
DOIs
Publication statusPublished - May 10 2011

Keywords

  • chalcogenides
  • gas absorption
  • gas separation
  • heavy metal removal
  • porous materials

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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