Photocatalytic activity of gamma-irradiated TiO2

Hung Ho Chung, Myun Joo Lee, Jinho Jung, Sang Won Choi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Anatase TiO2 powders were treated by gamma-irradiation. The change of catalysts and their effect on the production of hydroxyl radicals were characterized by electron paramagnetic resonance (EPR) spectroscopy. Anatase TiO2 showed four typical peaks at g=2.005, g= 1.992, g= 1.973, and g= 1.951. The intensity of the peaks was increased by gamma-irradiation, and the increase was positively dependent on irradiation dose. The intensity of the peaks is deeply related to the efficiency of hydroxyl radical production by photocatalysis, and the efficiency was directly proportional to the difference of Ti3+ (g= 1.992) and O (g=2.005) intensity. Moreover, the photooxidative decomposition of perchloroethylene (PCE) was linearly dependent on the efficiency of hydroxyl radical production.

Original languageEnglish
Pages (from-to)483-487
Number of pages5
JournalJournal of Industrial and Engineering Chemistry
Volume8
Issue number5
Publication statusPublished - 2002

Keywords

  • Anstase TiO
  • EPR
  • Gamma-irradation
  • Hydroxyl radicals
  • PCE
  • Photocatalysis

ASJC Scopus subject areas

  • Chemical Engineering(all)

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