Preparation and magnetic property of the composite of nitrogen-doped carbon nanotubes decorated with nickel nanoparticles

Abstract A magnetic composite of nitrogen-doped carbon nanotubes (CN x ) decorated with nickel nanoparticles was synthesized by a chemical precipitation and deoxidization method. The decorated CN x were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The XRD pattern showed that CN x , nickel nanoparticles and little nickel oxides coexisted in the composite, TEM observation indicated that nickel nanoparticles were highly dispersed on the outer walls of CN x , Magnetic measurements by VSM demonstrated that the saturated magnetization and remanence of CN x were improved, while the coercivity was lowered after decorating with nickel nanoparticles.