Photocatalytic Properties of TiO2-Coatings Mounted on CaAl2O4:Eu2+, Nd3+ without Light Source
This paper aims at the investigation of photocatalytic properties of titanium dioxide coatings covering on the surfaces of long blue-emitting afterglow CaAl2O4:Eu2+, Nd3+ elaborated by a sol-gel method. Morphologies and microstructures of the coatings were observed mainly by transmission electron microscopy (TEM) and analyzed by X-ray diffraction (XRD). The photocatalytic behavior of the TiO2-base surfaces was evaluated by the degradation of methyl orange (MO) solution. It suggested that a layer of TiO2 film mounted on the phosphor particles successfully. Also, the TiO2 coatings had remained its photocatalytic role on the as-prepared sample even after the light source was removed. The inner long blue-emitting afterglow had released blue afterglow after removing light source and allowed for reactive TiO2 surfaces to be held for the removal of methyl orange.
Hyungsun Kim, JienFeng Yang, Tohru Sekino and Soo Wohn Lee
H. H. Li and Y. H. Wang, "Photocatalytic Properties of TiO2-Coatings Mounted on CaAl2O4:Eu2+, Nd3+ without Light Source ", Materials Science Forum, Vols. 620-622, pp. 671-674, 2009