Instantaneous integration of magnetite nanoparticles on graphene oxide assisted by ultrasound for efficient heavy metal ion retrieval.

•Magnetite nanoparticles were integrated into graphitic basal regions on graphene oxide (GO) assisted by ultrasound.•Oxygen containing functional groups in GO has not been reduced during the hybridization.•Metal ion adsorption functionality such as adsorption capacity was tested for Pb(II) and Au(III), which was comparable to GO.