METHOD OF PRODUCING SILVER NANOPARTICLES Russian patent published in 2017 - IPC C01G5/00 B22F9/24 B01J19/00 B82Y40/00 

FIELD: nanotechnologies.

SUBSTANCE: invention relates to the field of nanotechnologies. For obtaining silver nanoparticles mixed is a fructose-glucose syrup from girasol tubers with a silver nitrate solution. To obtain the fructose-glucose syrup squeezed is juice from girasol tubers and mixed with hot water in the ratio of 1:1(2). Obtained solution is added with food citric acid to reach the pH of 3.0–4.0 and exposed to a microwave field at the temperature of 80–85 °C for 20–30 minutes. Fructose-glucose syrup is concentrated up to the content of not less than 70–80 % of dry substances at the temperature of 60–70 °C. Fructose-glucose syrup from girasol tubers may also be obtained by dissolving powder (dried syrup) in hot water. Produced fructose-glucose syrup is mixed with the silver nitrate solution in the volume ratio of 5(6):1, treated with ammonium hydroxide solution up to the pH of 8.0–8.5 and exposed to a microwave field at the temperature of 65–70 °C for 1.5–2 hours. Sol of silver nanoparticles is obtained.

EFFECT: invention simplifies and lowers the process cost of producing silver nanoparticles, reduces power consumption.

1 cl, 2 dwg, 1 tbl, 4 ex