Two Methods Of Preparing Nano Ag And Au And The Research Of Their Application

Noble nanostructures have attracted much attention during the past several decades owing to their promising applications in catalysis, optics, and bio-systems. In recent years, there are many studies on the synthesis and properties of the noble metal nanoparticles. Seed growth method, template method, electrochemical synthesis, bio-synthesis all can get nanomaterials. In this paper, the bio-synthesis and seed growth method were used to synthesis nanosilver and gold particles. And furthermore, silver nanoparticles were deposited on egg membrane bandage, to form a new egg membrane bandage contained silver nanoparticles exhibited excellent antibacterial. Nanogold nanoparticles are prepared by the aloe extract too. The nanogod nanoparticles are prepared by seed growth method are immobilized the surface electrode to explore the electrochemical catalytic performance.The main research work as following:(1) Silver nanoparticles were synthesized by using a rapid, single step, and completely green biosynthetic method which employes aqueous aloe leaf extracts as both the reducing and capping agent. Furthermore, silver nanoparticles were deposited on egg membrane bandage, forming a new egg membrane bandage contained silver nanoparticles exhibited excellent antibacterial against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, which is2.5times stronger than commercially available bandage.(2) Aqueous aloe leaf extracts act as both the reducing and capping agent not only in progress of synthesis of nanosliver, but in progress of synthesis of nanogold.(3) Different shapes of nanogold particles, such as shortrod, longrod, spherical, pillow, branch, are prepared by seed grown method.(4) Different shapes of nanogold particles are prepared by seed growth method are immobilized the surface electrode to explore the electrochemical catalytic performance. Nanogold particles exhibited excellent catalytic performance and diffrernt shapes had different suitable quantity.