Xuan SH, Jiang WQ, Gong XL, Hu Y, Chen ZY (2009) Magnetically Separable Fe(3)O(4)/TiO(2) Hollow Spheres: Fabrication and Photocatalytic Activity. Journal of Physical Chemistry C 113(2), 553-558. [In English]

Web link: http://dx.doi.org/10.1021/jp8073859

Keywords:

visible-light irradiation; titania spheres; mesostructured titania; films; nanoparticles; particles; composite; catalysts; ferrite; size

Abstract: Well-defined magnetic separable, hollow spherical Fe(3)O(4)/TiO(2) hybrid photocatalysts were successfully prepared through a poly(styrene-acrylic acid) (PSA) template method. This bifunctional product was characterized in terms of the particle size, surface morphology, chemical composition, and magnetic properties using transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), and X-ray powder diffraction (XRD) patterns. The M-H hysteresis loop for Fe(3)O(4)/TiO(2) hollow spheres indicates that the composite spheres show superparamagnetic characteristics at room temperature. These magnetic TiO(2) composites with hollow nature exhibit good photocatalytic activity under UV light irradiation and can be recycled six times by magnetic separation without major loss of activity. This method can be further applied to synthesize other bifunctional hollow spheres, such as Fe(3)O(4)/SnO(2) and Fe(3)O(4)/CdS.