Preparation and characterization of strontium magnetic photocatalyst

Strontium magnetic photocatalyst(TiO2-SrFe12O19) was prepared from self-made strontium carbonate and tetra-n-butyl titanate by ultrasound technique,when strontium ferrites(SrFe12O19) used as magnetic substrate.Surface properties and magnetic properties of the strontium magnetic photocatalyst were determined by XRD,IR,BET and VSM.The result indicated that the catalyst's the grain size was in the range of 20-30nm,and specific surface area was 44.8m2/g,the average pore size was 7.09nm.Therefore,the catalyst was a mesoporous magnetic material.Saturation magnetization(Ms) and the coercivity(Hc) of the catalyst was 12.9A·m2/kg and 120.9kA/m,respectively.The high magnetic property was beneficial to separate easily and reuse for this catalyst.TiO2-SrFe12O19 catalyzed the degradation reaction of methylene blue(MB),removal ratio was 94.7%.The efficient removal ratio of the photocatalyst was 88% when the cFatalyst was employed 3 times repeat continually.The activity of TiO2-SrFe12O19 was stable in the process of pollutant degradation.