title: Selenium-modified TiO2 and its impact on photocatalysis.
abstract: This work describes the preparation of a selenium-modified TiO(2) photocatalyst and a preliminary evaluation of its photocatalytic activity. Se-TiO(2) displayed greater visible absorption than undoped TiO(2) and was still capable of degrading quinoline at a slightly faster rate than undoped TiO(2) under UV light. Se-TiO(2) was also able to degrade organic molecules under purely visible light by a single electron transfer pathway. Irradiation with >435 nm light showed no evidence of efficient production of HO•-like species. Se-TiO(2) was also examined under hypoxic conditions, where the Se atoms were capable of trapping photogenerated electrons as evidenced by XPS.
authors.affiliation: Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States.
authors.forename: Erin M
authors.initials: EM
authors.lastname: Rockafellow
authors.forename: Jessica M
authors.initials: JM
authors.lastname: Haywood
authors.forename: Travis
authors.initials: T
authors.lastname: Witte
authors.forename: Robert S
authors.initials: RS
authors.lastname: Houk
authors.forename: William S
authors.initials: WS
authors.lastname: Jenks