Hydrothermal synthesis of potassium titanate nanotubes doped with magnesium, nickel, and aluminum

• Published in: Russian journal of applied chemistry 2017, Vol.90 (2), p.193-197
• Main Authors: Maslennikova, T. P., Sinel’shchikova, O. Yu, Besprozvannykh, N. V., Gatina, E. N., Kuchaeva, S. K., Ugolkov, V. L.
• Format: Article
• Language: English
• Subjects: Aluminum; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Composite materials; Construction materials; Crystal structure; Decomposition; Hydrothermal treatment; Hydroxides; Industrial Chemistry/Chemical Engineering; Molybdenum; Nanotubes; Nickel; Photocatalysis; Photocatalysts; Physicochemical Studies of Systems and Processes; Potassium; Sorbents; Specific surface; Surface area; Titanium oxides
• ISSN: 1070-4272; 1608-3296
• DOI: 10.1134/S1070427217020057

Study of the phase formation in the systems TiO 2 ‒MO(M 2 O 3 )‒KOH‒H 2 O (M = Mg, Ni, Al) from crystalline and coprecipitated X-ray-amorphous mixtures demonstrated that doped potassium titanate nanotubes can be obtained in a hydrothermal treatment of coprecipitated hydroxides in the temperature range 170‒220°C. The average outer diameter of the thus synthesized nanotubes strongly depends on the element being introduced and is 5 to 10 nm. The nanotubes have a large specific surface area (200‒300 m2 g‒1) and are stable up to a temperature of 500°C, above which they decompose to give potassium hexatitanate. The nanotubes can be used as sorbents, photocatalysts, and components of composite materials for frictional and construction purposes.