METHOD FOR PREPARING METAL/CERAMIC COMPOSITE NANOSTRUCTURE, METAL/CERAMIC COMPOSITE NANOSTRUCTURE PREPARED BY METHOD, AND CATALYST COMPRISING SAME

摘要

The present invention relates to a metal/ceramic composite nanostructure and, to a method for preparing a metal/ceramic composite nanostructure, comprising: an interfacially-active metal nanoparticle solution preparation step of mixing a colloid solution of metal nanoparticles coated with a surfactant and a surfactant aqueous solution in which the surfactant is dissolved in water; a metal nanoparticle-chelate mixture solution preparation step of mixing the interfacially-active metal nanoparticle solution and a chelate solution; a metal nanoparticle-chelate-rare earth metal ion mixture solution preparation step of mixing the metal nanoparticle-chelate mixture solution with a rare earth metal ion solution and an oxidizing agent; and a maturation step of maturing the metal nanoparticle-chelate-rare earth metal ion mixture solution. A rare earth metal oxide film having a uniform thickness can be formed as a shell since the nanoparticles surrounded by the surfactant are positively charged and the chelate-rare earth ion composite is negatively charged, thereby inducing a reaction therebetween by electrostatic force, and the thickness of the shell can be readily controlled at the nanoscale level by controlling the amount of the chelate solution and the rare earth ions.