Magnetic iron species highly dispersed over silica: use as catalysts for removal of pollutants in water.

FeO-SiO composites were prepared by impregnation (sample FeIMP) or doping (sample FeDOP) in the structure of porous silica. The dye removal capacity of the materials was investigated through adsorption and oxidation studies of methylene blue and rhodamine B. N adsorption/desorption measurements on FeIMP and FeDOP resulted in specific areas of 27 and 235 m g, respectively.