“…As is well-known, there have been various approaches to deposit monometal magnetic nanoparticles such as Ni [18], Co [19], Fe [20], Fe 2 O 3 [21] and Fe 3 O 4 [22] on the surface of MWCNTs by microwave irradiation heating method, chemical precipitation and deoxidization method, pyrolysis of ferrocene, chemical precipitation, and by using ethylene glycol as reductant, respectively. In these methods, microwave-assisted synthesis has remarkable advantages of short reaction time, small particle size, narrow particle size distribution, high purity of the products and eco-friendly.…”