Synthesis And Characterization Of CeO₂@Au Core-Shell Structured Self-Assembly Nanoparticles

Core-shell nanoparticles is a new kind of materials studied extensively in recent years because of their unique optical, electric, magnetic, catalytic and micromechanical properties, which are substantially different from those of mono-component particles.As attractive building blocks of advanced functional materials,it has important applications in such areas as photonic band gap materials, microwave absorbing materials, electrorheolo-gical (or magnetorhelogical) fluids, the synthesis of a composites semiconductor, controllable release or protection of bioactive substances, controllable catalysis, and nanoreactor or nanoseparator etc. CeO₂@Au core-shell nanoparticles is an important catalyst and widely used in water-gas shift reaction and direct methanol fuel cells.In this dissertation, different morphological nanoparticles of CeO₂ were prepared by urea decomposition method and hydrothermal method. The effect factors on CeO₂ nanoparticles were analysed.CeO₂@Au nanoparticles were preliminarily obtained by chemical reduction.The effect factors on CeO₂@Au nanoparticles were discussed preliminarily.The prepared samples were deeply investingated by TG-DTA, TEM,XRD,UV-Vis,etc. Some significant new results were obtained and laid the foundation for further investigation of the properties and application of CeO₂@Au structured core-shell nanoparticles...