The effect of electrolytes on the surface potential at the rutile/aqueous interface

作者：Preocanin Tajana^*; Selmani Atida; Mazur Darko; Kallay Nikola

来源：Applied Surface Science, 2010, 256(17): 5412-5415.

DOI：10.1016/j.apsusc.2009.12.121

• Surface potential
• Point of zero potential
• Titania
• Rutile
• Counterion association

The method for evaluation of surface potential from the electrode potential of single crystal electrodes is refined. The effect of NaCl and LiCl concentrations on the dependency of the surface potential of TiO(2) on pH was examined. The point of zero potential was shifted to lower pH values in the presence of NaCl and to higher pH values in the presence of LiCl. The interpretation of the data based on the Surface Complexation Model suggested that at 0 0 1 crystal plane of rutile, sodium ions as counterions have more pronounced affinity for association with negatively charged surface groups with respect to the lithium ions.

• 出版日期2010-6-15