Oxygen-vacancy-modified brookite TiO2 nanorods as visible-light-responsive photocatalysts

Sangbaek Park, Seungtae Baek, Dong-Wan Kim, Sangwook Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Brookite is the least studied TiO2, and its modification for improved photocatalytic activity remains a challenge because of the difficulties encountered in obtaining its pure form. Here, we report for the first time visible-light-active brookite (BT) nanorods with a high specific surface area and a large amount of oxygen vacancies, which are synthesized via a simple, one-step, surfactant-free, wet-chemical method. The oxygen vacancies of the BT nanorods facilitate absorption of visible light, and the absorption property could be tailored by post-annealing, without any significant change in the surface area and anisotropic morphology. BT nanorods annealed at 300 °C show superior photocatalytic activity compared to anatase TiO2 nanoparticles and other visible-light-active photocatalysts.

Original languageEnglish
Pages (from-to)146-149
Number of pages4
JournalMaterials Letters
Volume232
DOIs
Publication statusPublished - 2018 Dec 1

Keywords

  • Brookite TiO
  • Nanorod
  • Oxygen vacancy
  • Photocatalysis
  • Visible light

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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