Preparation and enhanced photocatalytic performance of a novel photocatalyst: Hollow network Fe3O4/ mesoporous SiO2/TiO2 (FST) composite microspheres

226While the methyl orange molecules in mesoporous channels were degraded, the more methyl orange molecules in hollow structure would diffuse quickly into the mesoporous channels for further reaction with the TiO2 nanoparticles in the mesoporous channels.