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Journal of Materials Science

, Volume 52, Issue 11, pp 6341–6348 | Cite as

Comparing photocatalytic activities of commercially available iron-doped and iron-undoped aeroxide TiO2 P25 powders

  • Johannes Melcher
  • Shaik Feroz
  • Detlef Bahnemann
Original Paper

Abstract

Transition metal doping is an appropriate way to increase the photocatalytic activity of TiO2 as it offers the chance to also utilize visible light to generate charge carriers. Here, we investigated the photocatalytic activity of commercially available Evonik Aeroxide® TiO2 P25 and its iron-doped analog Evonik Aeroxide® TiO2 PF2. For this study, we used as model reaction the photocatalytic oxidation of methanol (CH3OH) to formaldehyde (HCHO) employing artificial solar illumination with and without UV-light. Apparently, the iron content in PF2 is too high and therefore has a negative effect on its photocatalytic activity. Furthermore, by the comparison of photonic efficiencies (ξ) and quantum efficiencies (Φ) we could show the importance of not just calculating photonic efficiencies but also shed some light on the mechanism how the charge carriers in P25 are generated.

Keywords

TiO2 Rutile Photocatalytic Activity Doping Concentration Quantum Efficiency 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors thank the workgroup of Dr. Bigall for using their photospectrometer and the “European Regional Development Fund” for supporting the programme “Europa fördert Niedersachsen,” especially the Project Nanokomp—Nanostrukturierte Kompositmaterialien—von der Entwicklung in die Produktion (WA3-80125215).

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Johannes Melcher
    • 1
  • Shaik Feroz
    • 2
  • Detlef Bahnemann
    • 1
    • 3
  1. 1.Institut für Technische ChemieLeibniz Universität HannoverHannoverGermany
  2. 2.Caledonian College of EngineeringSeebOman
  3. 3.Laboratory for Nanocomposite Materials, Department of Photonics, Faculty of PhysicsSaint-Petersburg State UniversitySaint PetersburgRussia

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