Investigation of the role of platinum oxide for the degradation of phenol under simulated solar irradiation

Harrison S. Kibombo, Chia-Ming Wu, Rui Peng, Jonas Baltrusaitis, Ranjit T. Koodali

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16 Citations (Scopus)

Abstract

We demonstrate that a desired oxidation state can be achieved by synthetic colloidal methods and the choice of characterization technique is crucial for determining the physicochemical properties that influence the photocatalytic activities. XPS studies showed that PtO2 was realized in this study, and the resultant crystalline PtO2–TiO2 prepared by subsequent hydrothermal treatment demonstrated activity for phenol degradation under simulated solar light irradiation. Preformed platinum based TiO2 ensures control over the oxidation state and the crystallite size of titania. The role of Ptox in the form of stable Pt4+ is elucidated as a mild recombination center, whereas the crystallite size of Pt in surfactant free Pt0–TiO2 appears to be the overriding factor for attaining enhanced photocatalytic performance.
Original languageUndefined
Pages (from-to)248-259
JournalApplied catalysis B: environmental
Volume136-137
DOIs
Publication statusPublished - 5 Jun 2013

Keywords

  • IR-87946
  • METIS-298649

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