The synthesis and characterization of highly visible-active TiO 2-based photocatalyst

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

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


The present study focuses on the photocatalytic activity of carbon-doped TiO2 prepared by the sol-gel method. The decomposition of acetaldehyde under visible light illumination showed that modified TiO 2 catalyst had high activity under visible irradiation (> 420 nm), 8 times higher than that of commercial P25 TiO2. Catalysts were characterized by X-Ray powder diffraction (XRD), UV-vis diffuse reflectance spectrophotometer (DRS), X-Ray photoelectron spectroscopy (XPS), and surface area measurement by N2 adsorption-desorption. It was found that elemental carbon was doped both on the surface and inside the bulk of TiO 2. The elemental carbon acted as a photosensitiser. Under visible light irradiation, the excited photosensitiser injected the electron into the conduction band of TiO2 and then the electron was transferred to adsorbed O2, producing superoxide radical anion O2 - which participated in the oxidation of acetaldehyde.

Original languageEnglish (US)
Title of host publication2007 AIChE Annual Meeting
StatePublished - 2007
Externally publishedYes
Event2007 AIChE Annual Meeting - Salt Lake City, UT, United States
Duration: Nov 4 2007Nov 9 2007

Publication series

NameAIChE Annual Meeting, Conference Proceedings


Other2007 AIChE Annual Meeting
Country/TerritoryUnited States
CitySalt Lake City, UT


  • Carbon
  • DRS
  • N adsorption-desorption
  • Photocatalyst
  • TiO
  • XPS
  • XRD

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)


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