Magnetic TiO2-graphene composite as a high-performance and recyclable platform for efficient photocatalytic removal of herbicides from water

► A magnetically separable TiO2-graphene photocatalyst is carefully designed. ► The catalyst exhibited almost 100% photocatalytic removal of 2,4-D from water. ► The photocatalyst is easily recovered with excellent reusability. ► After being laid aside for one year the catalyst still kept 95.6% removal of 2,4-D. ► 2,4-D in real wastewater could be efficiently removed.