HYBRID NANO PARTICLE CONTAINING METAL OXIDE AND CARBON, AND ITS PREPARATION THEREOF

摘要

A metal oxide-carbon hybrid nano-particle and a manufacturing method thereof are provided to obtain metal oxide-carbon hybrid nano-particles having a unique structure, in which the porous spherical metal oxide is put in porous material in the form of egg-box panel, for various industrial application. A metal oxide-carbon hybrid nano-particle has core-shell structure in which a spherical metal oxide core is surrounded by hollow-hemispherical carbon shell having porous skin. The metal oxide is one or at least two selected from silica, alumina, seria, titania and zirconia. The diameter of the core is 100nm-100mum, and the specific surface area of the nano-particle is 100-2,000m^2/g. The manufacturing method of the metal oxide-carbon hybrid nano-particle comprises the steps of: etching the spherical metal oxide-carbon hybrid nano-particle having core-shell structure to partially remove up to 20-70% of the metal oxide core, followed by drying the resultant for preparing partially etched spherical metal oxide-carbon hybrid nano-particle; and preparing slurry by mixing the partially etched spherical metal oxide-carbon hybrid nano-particle with oxidant, followed by reacting them at 40-80deg.C for forming metal oxide-carbon hybrid nano-particle which has a spherical metal oxide core surrounded by hollow-hemispherical carbon shell having porous skin. The etching process is carried out by using admixed etching solution comprising 0.1-2.0 parts by weight of HF only, HF with NaOH or HF with KOH with respect to 1 part by weight of the spherical metal oxide-carbon hybrid nano-particle for 0.2-10 hours. The oxidant is peroxide, inorganic acid or mixture thereof, and it is used in the amount of 0.05-5.0 parts by weight with respect to 1 part by weight of the spherical metal oxide-carbon hybrid nano-particle. The oxidizing reaction is carried out for 5-20 hours.