In the framework of this work, the influence of the type of precursor and stabilizer on the dispersion characteristics of selenium nanoparticles, in particular, the average hydrodynamic radius and ζ potential of the particles, was studied. Nanoparticles were obtained by chemical reduction in an aqueous medium. Lithium, sodium, and potassium selenites were used as a precursor, and ascorbic acid was used as a reducing agent, and 4 surfactants were used as a stabilizer: anionic – sodium laureth sulfate, cationic – CTAC, nonionic – Tween-80, amphoteric – cocamidopropyl betaine. For samples stabilized with sodium laureth sulfate, a negative value of this indicator is observed, while using other stabilizers, a positive value of the ζ-potential is observed. The optimal surfactant is cocamidopropyl betaine, which is due to the fact that when changing the concentrations of substances, it showed the smallest changes in the average hydrodynamic radius and ζ-potential of selenium nanoparticles. It is shown that the type and concentration of the precursor have little effect on the average hydrodynamic radius of selenium nanoparticles. It has been established that an increase in the concentration of the precursor leads to a decrease in modulus ζ-potential of particles. It is important to note that the type of precursor does not significantly affect the ζ potential of selenium nanoparticles.


Разработка: студия Green Art