Metal nanoparticles supported graphene oxide 3D porous monoliths and their excellent catalytic activity

► Au/GO and Ag/GO hybrid materials were fabricated without adding any reducing agents. ► Au/GO and Ag/GO aerogels were prepared using unidirectional freeze-drying method. ► The Au/GO aerogels were excellent catalysts for the reduction of 4-nitrophenol. ► The Au/RGO aerogels showed superior catalytic activity for the Suzuki reaction. ► The Au/RGO aerogels exhibit good reusability.