Enhanced photocatalytic decomposition of methylene blue by the heterostructure of PdO nanoflakes and TiO 2 nanoparticles

Chien Jung Huang, Fu-Ming Pan*, I. Chun Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We prepared PdO nanoflakes by reactive sputter deposition to form a heterostructure with TiO 2 nanoparticles on the SiO 2 substrate for the study of photocatalytic decomposition of methylene blue (MB) molecules. Although the PdO nanoflake has little photocatalytic activity toward MB decomposition, the PdO/TiO 2 heterostructure has a photocatalytic activity toward MB decomposition under UV light illumination as large as twice that of bare TiO 2 nanoparticles. The enhancement in the photocatalytic activity is ascribed to the fast photogenerated carrier separation resulting from the potential barrier formed at the heterojunction between the two oxide semiconductors. Although PdO nanoflakes can be photoexcited under visible light illumination, the PdO/TiO 2 heterostructure exhibits little photocatalytic activity toward the MB decomposition.

Original languageEnglish
Pages (from-to)345-351
Number of pages7
JournalApplied Surface Science
Volume263
DOIs
StatePublished - 15 Dec 2012

Keywords

  • Heterostructure
  • Methylene blue
  • PdO
  • Photocatalysis

Fingerprint Dive into the research topics of 'Enhanced photocatalytic decomposition of methylene blue by the heterostructure of PdO nanoflakes and TiO <sub>2</sub> nanoparticles'. Together they form a unique fingerprint.

Cite this