Colloid-chemical properties of suspension electrolytes for obtaining of PbO2–TiO2 composite materials
The sizes of colloid particles and aggregate stability of nitrate and methanesulfonate suspension electrolytes used for obtaining of PbO2–TiO2composite materials were investigated. It is found, that TiO2colloid solutions at the presence of the big surpluses of plumbum ions and acids are inclined to fast aggregation. The same effect results also introduction in electrolytes of the sodium dodecylsulfate additives. It was established that the adsorption of sodium dodecylsulfate on the TiO2 powder had a weak specific nature, as evidenced by the low value of the energy of adsorption interaction. As a result of the conducted researches it was established that aggregately stable suspension electrolytes may be derived from sols of titanium dioxide, which are formed by the hydrolysis of titanium isopropylate. Optimum conditions of obtaining of electrolytes with high aggregative stability were determined: рН ~ 1, concentration Pb(II) salt – 0.1 M, the size of particles TiO2 sol – no more than 14 nm.a
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