The adsorption and electrokinetic properties of hybrid silica materials composed of nickel and silicon oxides (Ni_xO_y-SiO₂), characterized by different contents of nickel oxide (from 0.5 to 3 mmol/g SiO₂), were examined. These solids were also modified by poly(vinyl alcohol) to change their surface characteristics. The polymer is non-toxic and very well soluble in water. Due to incomplete hydrolysis of the polymer acetate groups, its macromolecules become negatively charged. The limited range of studied pH (6–10) resulted from high solubility of nickel oxide at more acidic pH values. The spectrophotometric, surface charge and electrophoretic measurements indicated that PVA exhibits higher adsorption affinity for the surfaces of mixed oxide with a larger content of nickel in its structure. Moreover, the presence of polymeric layers on the solid surface influences considerably the structure of electrical double layer formed at the mixed oxide-aqueous solution interface.

由镍和氧化硅（Ni _x O _y -SiO ₂）组成的混合二氧化硅材料的吸附和电动特性，其特征在于氧化镍的含量不同（0.5至3 mmol / g SiO ₂），进行了检查。这些固体也可以通过聚乙烯醇改性，以改变其表面特性。该聚合物是无毒的，非常易溶于水。由于聚合物乙酸酯基团的不完全水解，其大分子带负电。pH值的有限范围（6-10）是由于在酸性更高的pH值下氧化镍具有较高的溶解度。分光光度法，表面电荷法和电泳法测定表明，PVA对结构中镍含量较高的混合氧化物的表面具有较高的吸附亲和力。而且，在固体表面上聚合物层的存在极大地影响了在混合氧化物-水溶液界面处形成的双电层的结构。