Investigation of TiO2-SiO2-Fe3O4 core-shell nanoparticle properties with different functional layer thickness

This paper investigates different properties of the TiO₂-SiO₂-Fe₃O₄ core-shell nanoparticles encapsulated for 1 times, 2 times, 3 times (which are named as TSF1, TSF2 and TSF3 in this paper). The TSF nanoparticles were obtained through carbon reduction method and sol-gel method. The properties of the TSF1, TSF2 and TSF3 were characterized by Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Vibratory Sample Magnetometer (VSM) and BET surface areas. The results show that the TSF2 exhibited better property than the others. The relationships between the irradiation time and decoloration rate of the TSF1, TSF2 and TSF3 indicate that the TSF2 has significant efficiency in decolorating the methyl orange under ultraviolet light.