IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v33y2008i2p277-281.html
   My bibliography  Save this article

Visible light-active nitrogen-doped TiO2 thin films prepared by DC magnetron sputtering used as a photocatalyst

Author

Listed:
  • Prabakar, K.
  • Takahashi, T.
  • Nezuka, T.
  • Takahashi, K.
  • Nakashima, T.
  • Kubota, Y.
  • Fujishima, A.

Abstract

The visible light-active nitrogen-doped TiO2 has been prepared by dc-reactive magnetron sputtering using Ti target in an Ar+O2/N gas mixture. The preparation of highly crystallized anatase TiOxNy thin films with various nitrogen concentrations allowed us to identify the optimum nitrogen flow ratio for the photocatalytic oxidation (PCO) of 2-propanol. At higher nitrogen flow rate, nitrogen is found to be difficult to substitute for oxygen having been predicted to contribute the band gap narrowing, giving rise to undesired deep level defects. In addition, Raman spectroscopy and X-ray diffraction (XRD) studies revealed that highly crystallized anatase growth of nitrogen-doped TiOxNy thin films are difficult at higher nitrogen flow rate. The optical band gap was found to be lower for the films deposited at 2sccm of nitrogen flow rate. The PCO of 2-propanol was studied as a function of nitrogen flow rate using in situ FTIR spectroscopy. The PCO of 2-propanol found to proceed along two routes: one was through the chemisorbed species, 2-propoxide to form the CO2 directly; the other was through conversion of 2-propanol to acetone, followed by formation of formate species, and finally CO2.

Suggested Citation

  • Prabakar, K. & Takahashi, T. & Nezuka, T. & Takahashi, K. & Nakashima, T. & Kubota, Y. & Fujishima, A., 2008. "Visible light-active nitrogen-doped TiO2 thin films prepared by DC magnetron sputtering used as a photocatalyst," Renewable Energy, Elsevier, vol. 33(2), pages 277-281.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:2:p:277-281
    DOI: 10.1016/j.renene.2007.05.018
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148107001711
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2007.05.018?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:33:y:2008:i:2:p:277-281. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.