The effect of dissolved oxygen on the 1,4-dioxane degradation with TiO2 and Au-TiO2 photocatalysts

Na Kyoung Youn, Jung Eun Heo, Oh Shim Joo, Hyunjoo Lee, Jaehoon Kim, Byoung Koun Min

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In order to enhance the photocatalytic activity of TiO2, the recombination of photogenerated electron-hole pairs needs to be suppressed. Noble metals, e.g. Au nanoparticles, have been incorporated with TiO2 to efficiently separate charge carriers created in/on TiO2. On the other hand, dissolved oxygen (DO) in an aqueous solution was also known to scavenge the electrons, which avoid the recombination of electrons and holes. In this study, we investigated the combined system of Au nanoparticles incorporated with TiO2 and DO to gain insight into the relationship between them using a photocatalytic degradation of 1,4-dioxane. The rate constants of 1,4-dioxane photodegradation with respect to TiO2 catalysts with three different Au loadings, as well as DO levels, indicated the DO dependency is disproportional to the Au loading amount, implying that there is an overlapping function in capturing electrons between Au nanoparticles and DO.

Original languageEnglish
Pages (from-to)216-221
Number of pages6
JournalJournal of hazardous materials
Volume177
Issue number1-3
DOIs
Publication statusPublished - 2010 May

Keywords

  • 1,4-Dioxane
  • Au-TiO
  • Dissolved oxygen
  • Gold nanoparticles
  • Photocatalysis
  • TiO

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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