Enhanced visible-light induced degradation of benzene on Mg-ferrite/hematite/PANI nanospheres: In situ FTIR investigation

► Mg-ferrite/hematite/PANI photocatalysts showed enhanced photocatalytic activity. ► Ethyl acetate, carboxylic acid and aldehyde were the intermediate products. ► CO2 was produced as the final product during the reaction process. ► The high efficiency of charge separation was mainly ascribed to the hybrid effect.