Colloidal chemical properties of the sol V$_2$O$_5$ $\cdot$ $n$H$_2$O

The colloidal properties of the lyophilic dispersion system V$_2$O$_5$ $\cdot$ $n$H$_2$O sol studied in this work was obtained by the thermolysis of V$_2$O$_5$ powder with hydrogen peroxide. The dispersion phase exists in the form of nanorods. The optimal mole ratio of V$_2$O$_5$ and H$_2$O$_2$ for synthesizing the sol is 1:30, and the possible concentration of V$_2$O$_5$ in the entire colloidal system ranges between 0.3 to 1.6 mass percent. The existence of nanoparticles in this colloidal system and the pH range that maintains the stability of the sol conform to the phase diagram of vanadium (V) in an aqueous medium. The absolute value of the zeta potential of the sol increases when the initial concentration of the sol during synthesis increases and the ionic strength of the dispersion medium decreases. Potential curves of pair interaction between nanoparticles were also constructed according to the DLVO theory.