Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate

Tae Woo Kim, Su Gil Hur, Seong Ju Hwang, Hyunwoong Park, Wonyong Choi, Jin Ho Choy

Research output: Contribution to journalArticle

154 Citations (Scopus)

Abstract

An efficient visible-light active photocatalyst of porous CrO x-Ti1.83O4 nanohybrid with a 1:1 type ordered heterostructure is synthesized through a hybridization between a chromia cluster and exfoliated titanate nanosheets. The present nanohybrids are found to have a large surface area (ca. 250-310 m2 g-1) and an intense absorption of visible light, ascribable, respectively, to the formation of a porous structure and the hybridization of titanate with narrow-bandgap chromium oxide. After the calcination at 400°C, the nanohybrid shows an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (λ > 420 nm). The present study highlights the exfoliation-restacking route as a very powerful way to develop efficient visible-light-harvesting photocatalysts with excellent thermal stability.

Original languageEnglish
Pages (from-to)307-314
Number of pages8
JournalAdvanced Functional Materials
Volume17
Issue number2
DOIs
Publication statusPublished - 2007 Jan 22

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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