FIELD: chemistry.
SUBSTANCE: method for the preparation of a colloidal solution of silver nanoparticles, comprising the preparation of aqueous solutions of silver nitrate and solutions of a supramolecular polymer carrier, in which a synthetic highly purified silica with a concentration of 500-100000 ppm is used as a supramolecular polymer and mixed with AgNO3 in a concentration of 5-1000 ppm in distilled water with vigorous stirring. Then, silver nitrate is reduced to a metallic nano-sized state by sodium tetraboride under dark conditions, or using monochromatic red light at a wavelength of 620-760 nm.
EFFECT: increasing the shelf life of silver after the process of its recovery.
1 dwg
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