Long-Lasting Non-hydrogenated Dark Titanium Dioxide: Medium Vacuum Anneal for Enhanced Visible Activity of Modified Multiphase Photocatalysts

Lütfiye Y. Ozer, Harry Apostoleris, Florent Ravaux, Sergii I. Shylin, Fikret Mamedov, Andreas Lindblad, Fredrik O.L. Johansson, Matteo Chiesa, S. Jacinto, Giovanni Palmisano

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Multiphase TiO2 was stably modified by vacuum treatment for a dramatic improvement in visible-light absorption and photocatalytic reactivity. The samples were made of rutile-brookite, bare or N doped, and were grown on reduced graphene oxide. The stable introduction of Ti3+ species and oxygen vacancies resulting in mitigated electron–hole recombination was identified as the main responsible factor, along with a change in surface charges.

Original languageBritish English
Pages (from-to)2949-2954
Number of pages6
JournalChemCatChem
Volume10
Issue number14
DOIs
StatePublished - 19 Jul 2018

Keywords

  • doping
  • photocatalysis
  • titanium
  • vacuum annealing
  • visible-light radiation

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