EVALUATION OF TOLLENS, POLYSACCHARDE AND BIOLOGICALMETHODS FOR SILVERNANOPARTICLES PRODUCTION

In recent years, various methods have been developed evaluated synthesize nanoparticles with specific properties while striving to consume less energy, increase efficiency, and avoid the production of toxic byproducts. Among metallic nanoparticles, nanosilver has therapeutic applications. The control of size and shape of nanoparticles is important to obtain suitable properties. In the present study, Polysaccharide, Tollens and biological methods were investigated for silver nanoparticles production. In Polysaccharide and Tollens methods, starch and B-D glucose were used as a stabilizer and reducer, respectively. In biological method, supernatant and cell filtrate of Fusarium oxysporum fungus were used. Analysis by UV-visible spectrophotometer and DLS confirmed using high temperature and pressure (121°C, 15 psi) in Tollens method, led to the formation of silver nanoparticles with smaller size and greater productivity than lower temperature and pressure. UV-Vis spectrophotometer analysis showed that the size distribution of silver nanoparticles produced by supernatant is narrower than that produced by filtrate. Comparing of cell filtrate and supernatant in biosynthesis procedure by DLS analysis confirmed that utilization of cell filtrate it will result in formation of smaller nanoparticles with average size of 60 nm. Average size of nanoparticles, are obtained in Polysaccharide and Tollens methods 30 nm and 42 mm respectively.

کلیدواژه ها:

Green synthesis ، Silver nanoparticles ، Tollens method ، Polysaccharide method ، Biosynthesis