Abstract:
The pH of colloids is an important electrokinetic property which determines phase stability. We report the effect of temperature and nanoparticle concentration on pH of different nanocolloids of nanomaterials
of varied morphologies and sizes. Measurements over a
temperature range show that the pH of nanocolloids is a
strong function of temperature and the concentration of
the dispersed phase. Charge transport mechanisms leading to changes in the effective proton population are
discussed. The mannerism in which the electric double
layer (EDL) at the particle-fluid interface affects the pH
of nanocolloids is presented by appealing to the DLVO
theory of electrokinetics dispersion.
