3.2. Zeta potential
The zeta potential values of the colloidal nanosilica samples
synthesized at different sonication times and at a constant pH of
10.13 in the liquid medium are reported in Table 2. As can be seen,
all the measured values are less than 30 mV indicating a relatively
good stability for the produced colloidal nanosilica. Zeta
potential is influenced by various parameters among which pH is
the most important [30]. Consequently, due to a constant pH value
of the liquid medium, no considerable change has been observed in
the zeta potential value with sonication time.