Synthesis Of Green Environment-friendly Silver Nanoparticles And Its Spectroscopy Research

Along with the development of science and technology, nano-technology have developed rapidly in China, nano-materials have been widely applied to optical, electrical, and catalytic and other fields for its unique characterazation. Nano-silver which has very stable properties in the physical and chemical has been widely applied as coating materials and environmentally friendly materials and other fields. Currently,silver nano-materials have been extensively studied in the surface-enhanced filed.There are many ways to synthesize Silver nano-materials, such as chemical reduction, photochemical and electrochemical method. Every methods reflects its unique characteristic. however, Some of the approaches have caused certain harm to the environment, therefore,more and more researchers begin to use the method of green chemistry to synthesize nano-materials.Green Chemistry not using hazardous and toxic substances, not producing harmful toxic waste, not using backward production technology , not producing toxic products and making full use of green products, not releasing harmful substances. strive to prevent any pollution from the source. Comply with the requirements of sust-ainable economic development, Green chemistry is closely related to biology, physics, computer science, materials science, it will certainly spur the development of these subjects.Based on the above, this article summarized as the following three aspects :1. Anisotropy silver nanoparticles were synthesized using sesbania gum asreducer and stabilizer.The silver nanoparticles were synthesized using sesbania gum at hot temperature and characterized with UV-visible absorption spectroscopy, Scanning electron microscopy(SEM) and transmission electron microscopy(TEM). Meanwhile, the SERS activity of colloid was also analyzed.The results show that the colloid is spherical,and some are polygon.it has better stablility compared with citrate-stablized silver colloid. Gold colloid was also reduced by sesbania gum. Its characterization was measured with UV-visible absorption spectroscopy and Fourier transform IR spectroscopy and transmission electron microscopy. The results show that sesbania gum is a very reductive, and we think that it will be applied to synthesize other metal nano-materials.2. Sesbania Gum-silver nanoparticles was synthesized at room temperature using green chemistry method.The effects of concentration, time on the reaction was measured by UV-visible absorption spectra , the morphology of the silver nanoparticles was characterized by transmission electron microscopy; The structure of Sesbania Gum and silver colloid was measured by Fourier transform infrared spectroscopy .We Preliminary studied the stability of colloidal silver and filming , the entire system was under room temperature, using sesbania gum as reductant,which is a natural, non-toxic polymer, water as a solvent, it provides a mild reaction conditions, one step,"green synthesis"method of silver nanoparticles.3 . The mixed solution of Sesbania Gum and silver nitrate was induced bylaser .Silver nanoparticles were deposited on the fiber end face by laser-induced method. The morphology of silver nanoparticles was measured by scanning electron microscopy(SEM), SERS of molecular BVPP was detected by optical fiber probe.