Investigation of photocatalytic reaction for the titanium dioxide-phosphor composite

Jin Ho Yoon, Jung Sik Kim

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The present study examined the photocatalytic reaction of titanium dioxide (TiO2)-coated, phosphor composite particles. Nanocrystalline TiO2 layers were directly coated on the alkaline earth aluminate phosphor (CaAl2O4:Eu2+,Nd3+) particles by a sol-gel processing method and their photocatalytic reaction was analyzed according to the degradation of methylene blue aqueous solution under visible light irradiation. Compared with pure TiO2, the TiO2-coated phosphor powders showed a different photocatalytic mechanism and much faster photocatalytic reactivity under visible irradiation than that of pure TiO2, which was almost negligible. The mechanism of the photocatalytic reactivity for the TiO2-phosphor composite was discussed in terms of the energy band structure and phosphorescence. In addition, the TiO2-coated phosphor powders were characterized by X-ray diffraction and transmission electron microscopy.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
Issue number2
StatePublished - Mar 2010


  • Phosphor
  • Photocatalyst
  • Sol-gel process
  • Titanium dioxide


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