Zaitseva H. Ionites bsed on titanium phosphate synthesized from titanylsulfate by sol-gel method.

The thesis is devoted to the research of peculiarities of titanium phosphate (TiP) sol-gel synthesis from titanylsulfate solution and physical-chemical properties of synthesized TiP ion-exchanges. The original sol-gel method for TiP synthesis from TiOSO4 solution has been elaborated. Synthesized TiP samples were characterized by elemental analysis, TGA–DTA, DSC, solid-state 31P NMR MAS, acid and alkali pH-metric titration and porometric analysis. TiP samples were found mesoporous materials which porous structure is higher than analogous materials with similar chemical composition. For spherically granulated TiP the values of sorption capacities of some heavy metals (at static and dynamic conditions) in dependence on pH of equilibrium sorption and pH of conversation to ion-exchanged form have been determined. The method - hydrothermal treatment (HT) – that leads to increasing of TiP hydrolytic stability has been elaborated. The influence of HT conditions to physical-chemical properties of TiP has been determined. It was found that (TіО)2P2O7 and TіО2 crystallization, that realized during HT, resulted in extremal dependence of TiP adsorption properties from HT conditions. The optimal conditions for HT have been proposed.