PHYSICO-CHEMICAL PROPERTIES OF SELENIUM NANOPARTICLES SYNTHESIZED IN SODIUM-CARBOXYMETHYLCELLULOSE SOLUTIONS

Orginal langulage: Uzbek

Abstract

In this study, the possibility of forming and controlling the size of selenium nanoparticles of different sizes and shapes by chemical reduction method with 0.1 M solution of sodium selenite in the presence of ascorbic acid in polymer solutions of different concentrations of purified sodium-carboxymethylcellulose with degree of substitution-0,85 and degree of polymerization -1015. The stability of shape and size of selenium nanoparticles synthesized in solutions of purified sodium-carboxymethylcellulose with a concentration of 2,5-3% over time was confirmed by UV-spectroscopy anddynamic lightscattering (DLS) analysis methods.The degree of dispersion and homogeneity of the synthesized selenium nanoparticles was studied in relation to the time of ultrasonic dispersant exposure.With the increase of processing time intheultrasonic disperser to 5, 10, 20, 30 minutesд decrease in selenium nanoparticle size from 113 nm to 85 nm and their monodis-persity in solution from 37% to 88% was proved by dynamic light scattering analysis.