Formation of Hydrated Titanium Dioxide on the Surface of Aqueous Solution of Titanium(III, IV) Salt under the Action of Ammonia Gas

Abstract

During the interaction at the phase boundary, the aqueous interface between the titanium salt solution and air (NH3) gives rise to TiO2 · n H2O films consisting of nanoparticles about 20 nm in size. The morphology of products synthesized on the surface of TiOSO4, TiCl3, Ti2(SO4)3 solutions was studied by optical and electron microscopy. Using X-ray spectral microanalysis and X-ray phase analysis, the composition and crystal structure of the synthesized compounds were established. The conditions for obtaining tubular TiO2 · n H2O structures with the morphology of microscrolls about 10 µm in diameter and 200 to 600 µm in length were found. Possible reactions for the formation of gradient films of hydrated titanium dioxide and a hypothesis to explain the reasons for their transformation into microscrolls are proposed.