Comparative Study on Photocatalytic Performance of (La,Fe) and (Ce,Fe)-Codoped ZnO Nanoparticles

Abstract:

The present study evaluates the photocatalytic degradation of congo red as a model of organic pollutant over LaFe- and CeFe-codoped ZnO nanoparticles under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, diffuse reflectance spectroscopy. The photodegradation efficiency of congo red using two 20W UV lamp was higher for LaFe-codoped ZnO nanoparticles compared with CeFe-codoped ZnO nanoparticles. Photocatalytic mechanism was investigated by measuring the photocatalytic degradation rate in the presence of ammonium oxalate, natrium sulfate, tert-butyl alcohol as photogenerated holes, photogenerated electrons and hydroxyl radical species scavenger. The results revealed that electrons are the main species in the photocatalytic process.

• Periodical: Materials Science Forum (Volume 827)
• Pages: 31-36
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.827.31
• Online since: August 2015
• Authors: Nadia Febiana Djaja, Rosari Saleh*
• Keywords: Codoped ZnO, Congo Red, Photocatalytic, Rare Earth

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