@article { author = {Sung, Hyun-Je and Jung;Jung-Sik Kim, Sang-Chul and Ki, Byung-Min}, title = {Photocatalytic Characteristics For The Nanocrystalline TiO2 Supported On Sr4Al14O25: Eu2+, Dy3+ Phosphor Beads }, journal = {Advanced Materials Letters}, volume = {7}, number = {1}, pages = {36-41}, year = {2016}, publisher = {International Association of Advanced Materials}, issn = {0976-3961}, eissn = {0976-397X}, doi = {10.5185/amlett.2016.6106}, abstract = {The photocatalytic behaviors of TiO2-supported on the long lasting phosphor beads were examined. Nanocrystalline TiO2 was coated on ellipsoidal-spherical beads of an alkaline earth aluminate phosphor, Sr4Al14O25:Eu 2+ , Dy 3+ , by low pressure chemical vapor deposition (LPCVD). The photocatalytic reaction was examined by measuring the decomposition of benzene and toluene gases by gas chromatography under ultraviolet, visible light (λ> 410 nm) irradiation, as well as in the dark. The LPCVD TiO2-coated Sr4Al14O25:Eu 2+ , Dy 3+ showed an active photocatalytic reaction under visible irradiation. The mechanisms of the photocatalytic reactivity for the TiO2-coated Sr4Al14O25:Eu 2+ , Dy 3+ phosphor beads were discussed in terms of the crystal structure at the interface, energy band structure and phosphorescence. The coupling of TiO2 with the Sr4Al14O25:Eu 2+ , Dy 3+ phosphor resulted in energy band bending in the junction region between TiO2 and Sr4Al14O25:Eu 2+ , Dy 3+ phosphor, which makes the TiO2 crystal at the interface photo-reactive under visible light irradiation. The LPCVD TiO2-coated Sr4Al14O25:Eu 2+ , Dy 3+ phosphor beads were also photo-reactive in the dark through the light photons emitted from the Sr4Al14O25:Eu 2+ , Dy 3+ phosphor. }, keywords = {Photocatalyst,TiO2,phosphor beads,Sr4Al14O25Eu2+,Dy3+,LPCVD}, url = {https://aml.iaamonline.org/article_14745.html}, eprint = {https://aml.iaamonline.org/article_14745_55989035f8afa69d2e9d7dfe8c31b6a5.pdf} }