부산대학교 도서관

Abstract: Hard hexagonal barium ferrite BaFe12O19 (BaM), as well as core–shell structure BaFe12O19-TiO2 composite nanoparticles, was successfully prepared by solid state reaction. An interesting photocatalytic activity has been noticed for the first time in pure BaM and doped TiO2 nanopowders. The obtained powders can photodegrade organic pollutants in the dispersion system effectively and can be recycled easily using a magnetic field. The BaFe12O19-TiO2 magnetic photocatalyst is composed of two parts: (1) TiO2 shell used for photocatalysis and (2) BaFe12O19 core for separation by the magnetic field. The photocatalytic activity of the as-prepared magnetic photocatalyst is enhanced with BaFe12O19 doping. Besides, the saturation magnetizations of BaFe12O19-TiO2 nanoparticles decreased in comparison to pure hexaferrite, while the coercivity remains almost constant.