Preparation of Magnetic TiO2/CoFe2O4 Composite Photocatalytic Nanomaterial

A magnetic TiO2/CoFe2O4 composite nanomaterial was prepared by depositing TiO2 onto the Surface of magnetic CoFe2O4 Cores using an improved sol-gel coating technique. The phase structure, Size and maguetic property of the composite particles were characterized by XRD, TEM and Vibrating Sample Magnetometer(VSM) analysis. The magnetic property of the composite material was slightly weaker than pure CoFe2O4, but the coercive force was better. The spectrum response was from UV to visible region and the absorbance intensity remarkably increased. The results of the photocatalytic experiments indicated that under the sunlight, magnetic TiO2/CoFe2O4, composite nanomaterial showed fairly good reusability and higher decolorizing activity and catalytic stability than pure TiO2. For example, the decolorizing efficiency of Methylene Blue trihydrate (MB)solution reached 95% on the composite nanomaterial under the UV illumination when reaction time was 6 h and the efficiency could keep 90% when it was repeatedly used for 3 times.