Photocatalytic Activity of Cu-Doped Cerium Dioxide Nanoparticles

Abstract:

Pure CeO₂ and Cu-doped CeO₂ nanoparticles with different doping amounts of Cu in the range of 0.5-2.0 wt.% were synthesized by the combination of homogeneous precipitation and impregnation methods. The effect of Cu on the correlation of structural, optical and photocatalytic properties of CeO₂ were studied. The XRD results indicated that phase structures of pure CeO₂ and Cu-doped CeO₂ nanoparticles were cubic fluorite phase and no other characteristic peaks related to Cu were detected. TEM images revealed that all samples were spherical in shape with the size less than 10 nm. The shift of absorption edge of Cu-doped CeO₂ catalysts, corresponding to a decrease of band gap energies from 3.2 to 2.8 eV, was also observed as the amount of Cu dopant increased. The photocatalytic performances of the Cu-doped CeO₂ exhibited higher activity than pure CeO₂ for photocatalytic degradation of methylene blue under visible light irradiation, and the CeO₂ doped with 1.0 wt.% Cu exhibited the highest photocatalytic activity.

• Periodical: Key Engineering Materials (Volume 751)
• Pages: 801-806
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.751.801
• Online since: August 2017
• Authors: Du Ang Dao Channei*, Panatda Jannoey, Auppatham Nakaruk, Sukon Phanichphant
• Keywords: CeO₂, Cu-Doped CeO₂, Nanoparticles, Photocatalytic Activity

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