“…Several research groups planned diverse pathways to grow the magnetic nanoparticles on the surface of nanotubes in order to modify their magnetic, optical and photocatalytic properties. Niarostami et al [5] prepared the carboxylic group functionalized carbon nanotubes and loaded the ferrite nanoparticles on the surface of nanotubes through covalent attachment. Zhang et al [6] reported polyethylene imine as a non-covalent functionalizing agent to modify the surface of carbon tubes.…”