Novel doping for synthesis monodispersed TiO2 grains filled into spindle-like hematite bi-component nanoparticles by ion implantation

Abstract

The synthesis of multifunctional nanoparticles (NPs) that combine some of the unique physical and chemical characteristics of two or more classes of materials is still a key goal in modern materials chemistry and has attracted substantial interests in recent years. In that context, magnetic monodispersed TiO2 grains filled into spindle-like hematite bi-component NPs were synthesized by ion implantation. The α-Fe2O3/ TiO2 bi-component NPs present superparamagnetism at room temperature, and its saturation magnetization was enhanced from 0.53 emu/g (α-Fe 2O3 seeds) to 3.55 emu/g. The proposed doping synthesis method allows for fabricating the other bi- or multi-component NPs. The magnetic α-Fe2O3/TiO2 would be acted as "nanoreactors" and provide a promising composite photocatalyst with narrow and wide bandgap semiconductors in the future. Copyright 2012 Author(s).