NANOTUBULAR MATERIALS CRYSTALLISING IN SYSTEM OF KO-TiO-X-HO (X=NiO, MgO, AlO, CrO, CoO, FeO) AND METHOD OF THEIR SYNTHESIS Russian patent published in 2018 - IPC C30B29/32 C30B29/66 C01G23/00 C01D13/00 B01J20/30 B01J20/04 B01J20/06 B01J20/08 B01J21/04 B01J21/10 B01J23/04 B01J23/26 B01J23/745 B01J23/75 B01J23/755 B01J23/78 B22F9/24 B82B3/00 B82Y30/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: nanotubular materials crystallising in the system of K₂O-TiO₂-X-H₂O (X=NiO, MgO, Al₂O₃, Cr₂O₃, CO₂O₃, Fe₂O₃) are characterized by the fact that in their composition up to 10% of ions Ti⁴⁺ is replaced by doping two- or trivalent metal. The method of synthesis of nanotubular materials is characterized by the fact that the synthesis of the samples is carried out by hydrothermal treatment of a pre-prepared mixture of hydroxide in KOH solution, to produce the initial mixtures of hydroxides, a solution of titanyl chloride synthesised by reaction of TiCl₄ with chilled distilled water, is mixed with aqueous solutions of salts of finished elements in a predetermined ratio, and then the precipitation of hydroxides is produced by adding NH₄OH to the aqueous solution mixture at pH=9-9.5 followed by washing with distilled water, drying at 70-90°C and mechanical crushing, then the crushed precipitate is mixed with 10 M KOH solution and subjected to a hydrothermal treatment at 170-180°C for, at least, 24 hours, after which the resulting product is washed with distilled water.

EFFECT: invention makes it possible to synthesise potassium-titanate nanotubes with an average outer diameter of 5 to 12 nm.

2 cl, 5 dwg, 2 ex