Photocatalysis by Electron Transfer between Different-sized Anatases

Tsung Ying Ke, Chi Young Lee*, Hsin-Tien Chiu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

In the solution state, photocatalysis of micro- and nano-sized anatases can be optimized at flat band and in a high pH solution, respectively. Furthermore, a remarkable photocatalyst that can be adopted over a wide range of pH values was produced by mixing commercial micro- and nano-sized anatases. Mixing causes the electron transfer between the identical phase but different-sized TiO2 particles, subsequently separating the electrons and holes, as well as greatly facilitating photocatalysis. As is well known, the commercially available photocatalyst P25, a mixture of anatase and rutile, achieves a superior photocatalytic performance from pH 3 to 10, owing to the electron transfer between the various phases. This study elucidates these mixed photocatalysts, P25 and mixture of micro and nano-sized anatases. Crown

Original languageEnglish
Pages (from-to)109-113
Number of pages5
JournalApplied Catalysis A: General
Volume381
Issue number1-2
DOIs
StatePublished - 15 Jun 2010

Keywords

  • Electron transfer
  • P25
  • pH
  • Photocatalysis

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