Photocatalytic activity of multi-doped TiO2 nanoparticles for degradation of rhodamine B

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

Research output: Contribution to conferencePaperpeer-review

Abstract

Titanium dioxide (TiO2), as a chemically stable, nontoxic, highly efficient, and relatively inexpensive photocatalyst, has been widely used for water and air purification since many environmental pollutants can be degraded by oxidation and reduction processes on TiO2 surface. However, the application of TiO2 is limited by its UV activation requirement because of its large band gap. The current presents a facile sol-gel method for the synthesis of visible-light-active TiO2-based catalysts with multiple dopants. The catalysts were characterized by X-ray diffraction, UV-vis spectroscopy, and X-ray photoelectron spectroscopy. Results revealed that TiO2's structure was slightly distorted by the substitution of carbon, nitrogen, and sulfur dopants for some oxygen atoms and Fe3+ for Ti4+ in the lattice of TiO2. These dopants were responsible for narrowing the band gap and shifting the optical response shift of TiO2 from ultraviolet (UV) to the visible light region. Photocatalytic reaction showed that the reactivity of multi-doped TiO2 was significantly enhanced.

Original languageEnglish (US)
StatePublished - Dec 1 2009
Externally publishedYes
Event2009 AIChE Annual Meeting, 09AIChE - Nashville, TN, United States
Duration: Nov 8 2009Nov 13 2009

Other

Other2009 AIChE Annual Meeting, 09AIChE
CountryUnited States
CityNashville, TN
Period11/8/0911/13/09

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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