Effect of inorganic oxides treatment on the titanium dioxide surface properties
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Poznan University of Technology
Publication date: 2008-01-01
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Teofil Jesionowski   

Poznan University of Technology, Institute of Chemical Technology and Engineering Pl. M. Sklodowskiej-Curie 2, 60-965 Poznan, Poland
Physicochem. Probl. Miner. Process. 2008;42(1):141-152
Studies were conducted involving evaluation of titanium white, surface-coated with inorganic oxides. The studies aimed at determining dispersion properties, i.a. particle size distribution and polydispersity index. Moreover, microscopic observation allowed to evaluate surface morphology of the modified TiO2 particles. Colourimetric data of titanium white was measured and the specific surface area was estimated using BET method. Effect of the surface modification with oxides on electrokinetic properties and zeta potential were appraised. Increased amounts of aluminium oxide and silicon dioxide used for modification of titanium dioxide surface deteriorate uniform character of the sample and results in an increase in diameter of pigment particles. The titanium white pigments belong to mesoporous adsorbents. Value of the isoelectric point (IEP) depends on the amounts of aluminium oxide and silica used for surface processing of titanium white.
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