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

149 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

Fingerprint

Photocatalysts
Nanoparticles
nanoparticles
chromium oxides
Nanosheets
organic compounds
Organic compounds
Calcination
roasting
Heterojunctions
Chromium
Energy gap
Thermodynamic stability
thermal stability
routes
Irradiation
irradiation
Oxides

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, Tae Woo ; Hur, Su Gil ; Hwang, Seong Ju ; Park, Hyunwoong ; Choi, Wonyong ; Choy, Jin Ho. / Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate. In: Advanced Functional Materials. 2007 ; Vol. 17, No. 2. pp. 307-314.
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Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate. / Kim, Tae Woo; Hur, Su Gil; Hwang, Seong Ju; Park, Hyunwoong; Choi, Wonyong; Choy, Jin Ho.

In: Advanced Functional Materials, Vol. 17, No. 2, 22.01.2007, p. 307-314.

Research output: Contribution to journalArticle

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