부산대학교 도서관

Bimetallic nanoparticles have been drawn much attention from many researcher due to present greater abilities than monometallic nanoparticles. The bimetallic core-shell products of Cu and Co have been prepared by aqueous reduction process, which was added copper nitrate into an aqueous mixed solution that had been contained sodium citrate, nickel sulfate, and sodium borohydride. According to the advantages of this preparation process, not only it was not complicated, fast, and performed at room temperature, but also the core and shell type could be formed and desired. If the adding time of copper nitrate was changed, we were able to obtain either Cu-Co and/or Co-Cu core-shell systems with various in their morphology. Therefore, we studied the bimetallic nanoparticles with different adding time of copper nitrate such as 1, 5, and 10 min, respectively. While, monometallic Co nanoparticles were prepared with the similar method but no added copper nitrate. The bimetallic samples were investigated by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and Energy Dispersive X-ray Spectrometer (EDS) methods. Besides, the photocatalytic activity under UV light illumination of the bimetallic nanoparticles were observed with UV-Vis Spectrometer (UV-Vis). Compared with the monometallic nanoparticle, the bimetallic products enhanced the photocatalytic activity. [ABSTRACT FROM AUTHOR]