Size- And shape-controlled conversion of tungstate-based inorganic-organic hybrid belts to WO3 nanoplates with high specific surface areas

Deliang Chen, Lian Gao, Atsuo Yasumori, Kazuyuki Kuroda, Yoshiyuki Sugahara

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Two-dimensional monoclinic WO3 nanoplates with high specific surface areas are synthesized through a novel conversion process using tungstate-based inorganic-organic hybrid micro/nanobelts as precursors. The process developed involves a topochemical transformation of tungstate-based inorganic-organic hybrid belts into WO3 nanoplates via an intermediate product of H2WO4 nanoplates, utilizing the similarity of the W-O octahedral layers in both H2 WO4 and WO3. The as-obtained WO3 nanoplates show a single-crystalline nanostructure with the smallest side along the [001] direction. The WO3 nanoplates are 200-500 nm × 200-500 nm × 10-30nm in size, and their specific surface areas are up to 180 m 2 g-1. Photocatalytic measurements of visible-light-driven oxidation of water for O2 generation in the presence of Ag + ions indicate that the activity of the as-obtained WO3 nanoplates is one order of magnitude higher than that of commercially available WO3 powders.

Original languageEnglish
Pages (from-to)1813-1822
Number of pages10
JournalSmall
Volume4
Issue number10
DOIs
Publication statusPublished - 2008 Oct 1

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Keywords

  • Inorganic-organic hybrids
  • Nanoplates
  • Nanostructures
  • Photocatalysis
  • Tungsten oxide

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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