Importance of the tuning of band position in optimizing the electronic coupling and photocatalytic activity of nanocomposite

Xiaoyan Jin, Eun Kyung Mok, Ji Won Baek, Sang Hyun Park, Seong Ju Hwang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Abstract The electronic coupling and photocatalytic activity of Ag2CO3-TiO2 nanocomposite can be optimized by the fine-tuning of the band position of titanium oxide with nitrogen doping. The increase of the valence band energy of TiO2 by N-doping leads not only to the enhanced absorption of visible light but also to the promoted hole transfer from Ag2CO3 to TiO2, resulting in the efficient spatial separation of photogenerated electrons and holes. While the undoped Ag2CO3-TiO2 nanocomposite shows an inferior photocatalytic activity to the pure Ag2CO3, the photocatalyst performance of N-doped nanocomposite is better than those of Ag2CO3 and undoped Ag2CO3-TiO2 nanocomposite. This observation underscores a significant enhancement of the photocatalytic activity of nanocomposite upon N-doping, a result of enhanced electronic coupling between the hybridized species. The present results clearly demonstrate the importance of the fine-tuning of band position in optimizing the photocatalytic activity of hybrid-type photocatalysts.

Original languageEnglish
Article number18978
Pages (from-to)175-181
Number of pages7
JournalJournal of Solid State Chemistry
Volume230
DOIs
Publication statusPublished - 2015 Jul 18

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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