Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524
Qrcode

Article

Cross-Disciplinary Physics and Related Areas of Science and Technology

J. Korean Phy. Soc. 2011; 58(6): 1672-1676

Published online June 15, 2011     https://doi.org/10.3938/jkps.58.1672

Copyright © The Korean Physical Society.

Synthesis of Barium Ferrite for Visible Light Photocatalysis Applications

P. H. Borse, C. R. Cho, K. T. Lim, Y. J. Lee, T. E. Hong, J. S. Bae, E. D. Jeong, H. J. Kim, H. G. Kim

Abstract

Orthorhombic phase BaFe2O4 powder was synthesized by using a solid state reaction method and investigated for its visible light photocatalytic properties. The crystallization of the structural phase was found to occur at a temperature above 1000 ¡É yielding a pure orthorhombic phase BaFe2O4 (SG- B b21m) at 1100 ¡É. The estimated band gap, as determined by UV-Vis diffuse reflectance studies, was ¡­1.9 eV (652 nm). A new material was designed and fabricated as Pt/RuO2/BaFe2O4 to enhance its photocatalytic activity. A very low (<1 wt% RuO2) co-catalyst doping over BaFe2O4 was important for achieving high photocatalytic efficiency. The newly designed system was investigated for photo-decomposition of isopropyl alcohol (IPA) and of water under visible light (¡Ã420 nm). Its photocatalytic activity was significantly higher than that of platinized TiO2−xNx. A mechanism has been proposed to explain the photocatalytic behavior of the designed BaFe2O4 photocatalyst.

Keywords: Photodegradation, , Visible-light, Solid state reaction, BaFe2O4, Photocatalytic activity