Probing redox photocatalysis of trapped electrons and holes on single Sb-doped titania nanorod surfaces

Weilin Xu, Prashant K. Jain, Brandon J. Beberwyck, A. Paul Alivisatos

Research output: Contribution to journalArticle


We used a fluorogenic reaction to study in conjunction the photocatalytic properties for both active sites (trapped photogenerated electrons and holes) on individual Sb-doped TiO 2 nanorods with single-molecule fluorescence microscopy. It was found that active sites around trapped holes show higher activity, stronger binding ability, and a different dissociation mechanism for the same substrate and product molecules in comparison with the active sites around trapped electrons. These differences could be elucidated by a model involving the charged microenvironments around the active sites.

Original languageEnglish (US)
Pages (from-to)3946-3949
Number of pages4
JournalJournal of the American Chemical Society
Issue number9
StatePublished - Mar 7 2012


ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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