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International Journal of Photoenergy
Volume 2013, Article ID 410613, 9 pages
Research Article

Rare Earth Free Phosphor with Controlled Microstructure and Its Photocatalytic Activity

1Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Honjo-1, Saga 840-8502, Japan
2Department of Bio-Engineering, Faculty of Engineering, Kyushu University, Hakozaki 6-10-1, Fukuoka 812-8581, Japan

Received 9 May 2013; Accepted 4 July 2013

Academic Editor: Vincenzo Augugliaro

Copyright © 2013 Hom Nath Luitel et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Microsphere of rare earth free phosphor, , with broadband yellowish white emission was synthesized by combustion route and compared with the hydrothermal, sol-gel, and solid state reaction methods. The phosphor samples were characterized by X-ray diffraction and scanning electron microscopy. UV-visible absorption and photoluminescence (PL) emission and excitation spectra were investigated for these phosphors. phosphor containing 10 mol% of H3BO3 flux exhibited enhanced PL emission showing broadband from 450 nm to 750 nm. Effect of stoichiometry of Zn and V on the host lattice and its effect on the PL emission spectra were studied. Series of Mg3V2O8, , and Sr3V2O8 phosphors were also synthesized and compared to the phosphor in terms of PL emission and internal quantum yield, and it was found that is the most efficient phosphor among the other phosphors studied with quantum yield of 60%. The visible light irradiated photocatalytic activity of these phosphors was investigated and it was found that the hydrothermal exhibited enhanced activity.