Degradation of acetaldehyde with doped TiO2 photocatalyst under visible light irradiation

Xiangxin Yang, Chundi Cao, Keith Hohn, Larry Erickson, Ronaldo Maghirang, Kenneth Klabunde

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

C-, V-doped TiO2 photocatalysts are prepared by a sol-gel process. These catalysts are highly active for the degradation of acetaldehyde both under visible irradiation (> 420 nm) and in the dark, especially for 2.0% V-containing co-doped TiO2. Characterization results suggest that vanadium ions are introduced both on the surface and into the bulk of TiO2. A free electron, induced by the formation of V5+ in the sublayers of TiO2, is delocalized and promoted into the conduction band by thermal energy and further transferred to O2, generating superoxide radical anion (O2 •-) that is responsible for degradation of acetaldehyde in the dark. The doped elemental carbon increases the visible light sensitivity, the surface area, and the dispersion of vanadium.

Original languageEnglish (US)
Title of host publicationAIChE100 - 2008 AIChE Annual Meeting, Conference Proceedings
StatePublished - Dec 1 2008
Externally publishedYes
Event2008 AIChE Annual Meeting, AIChE 100 - Philadelphia, PA, United States
Duration: Nov 16 2008Nov 21 2008

Publication series

NameAIChE Annual Meeting, Conference Proceedings

Other

Other2008 AIChE Annual Meeting, AIChE 100
CountryUnited States
CityPhiladelphia, PA
Period11/16/0811/21/08

Keywords

  • Carbon
  • Photocatalyst
  • TiO
  • Vanadium
  • Visible light

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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  • Cite this

    Yang, X., Cao, C., Hohn, K., Erickson, L., Maghirang, R., & Klabunde, K. (2008). Degradation of acetaldehyde with doped TiO2 photocatalyst under visible light irradiation. In AIChE100 - 2008 AIChE Annual Meeting, Conference Proceedings (AIChE Annual Meeting, Conference Proceedings).