Single-crystalline tungsten oxide nanoplates

Deliang Chen, Hailong Wang, Rui Zhang, Lian Gao, Yoshiyuki Sugahara, Atsuo Yasumori

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Tungsten oxide nanocrystals are important semiconductor materials with a suitable energy band gap (ca. 2.5 eV) for visible-light utilization. Though there are a great amount of reports on the synthesis of WO3 nanocrystals, no effective routes to two-dimensional (2D) WO3 nanocrystals have been reported. We here developed a novel and efficient route to synthesize free-standing single-crystalline WOs nanoplates on a large scale and in a repeatable way. The proposed route involved a rational transformation of tungstate-based inorganic-organic hybrid nanobelts to single-crystalline WO3-H2O nanoplates, and then to single-crystalline monoclinic WO3 nanoplates with an inhibited crystal growth direction of [004]. The sizes of the as-obtained WO3 nanoplates are (200-500) nm × (200-500) nm × (10-30) nm. The WO 3 nanoplates as-synthesized have high specific surface areas (up to 180 m2 g-1) and showed remarkably enhanced visible-light photocatalytic properties in water splitting for O2 generation.

Original languageEnglish
Pages (from-to)596-600
Number of pages5
JournalJournal of Ceramic Processing Research
Volume9
Issue number6
Publication statusPublished - 2008 Dec 1

Keywords

  • Inorganic-organic hybrids
  • Layered compounds
  • Tungstate nanoplates
  • Tungsten oxide nanoplates
  • Two-dimensional nanostructures

ASJC Scopus subject areas

  • Ceramics and Composites

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