Controllable synthesis of SiC@Graphene core-shell nanoparticles via fluidized bed chemical vapor deposition

SiC@Graphene (SiC@G) core-shell nanoparticles were successfully prepared by a facile fluidized bed (FB) chemical vapor deposition (CVD) method. SiC@G core-shell nanoparticles with an average size of 10 nm and graphene from 1 to 5 layers with a controllable thickness were obtained by finely adjusting the experimental temperatures. The formation of SiC nanoparticles and graphene layers was confirmed by the results of X-ray diffraction (XRD) and Raman Spectroscopy. The graphene content in SiC@G core-shell nanoparticles prepared at different temperatures was measured from thermogravimetric analysis (TG), which varied from 5.89% to 11.88 mass%. From X-ray photoelectron spectroscopy (XPS) results, no absorption assigned to Si-O band was detected, indicating the effective protection of the SiC nanoparticles against oxidation by the graphene shell to resist oxidation of SiC nanoparticles. This novel method of preparation of SiC@G core-shell nanoparticles could be applied to large-scale production and find diverse applications in related fields.