Influence of interfacial water layer on surface properties of silver halides: Effect of pH on the isoelectric point

► Isoelectric points of silver halides are shifted to higher pAg values in acidic environment. ► Water layer at silver halide surfaces is negatively charged in the pH region above 4 causing more negative ζ-potentials. ► Pristine isoelectric points of silver halides were determined at pH = 3.