Abstract
Study of the phase formation in the systems TiO2‒MO(M2O3)‒KOH‒H2O (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.
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Original Russian Text © T.P. Maslennikova, O.Yu. Sinel’shchikova, N.V. Besprozvannykh, E.N. Gatina, S.K. Kuchaeva, V.L. Ugolkov, 2017, published in Zhurnal Prikladnoi Khimii, 2017, Vol. 90, No. 2, pp. 171−175.
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Maslennikova, T.P., Sinel’shchikova, O.Y., Besprozvannykh, N.V. et al. Hydrothermal synthesis of potassium titanate nanotubes doped with magnesium, nickel, and aluminum. Russ J Appl Chem 90, 193–197 (2017). https://doi.org/10.1134/S1070427217020057
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DOI: https://doi.org/10.1134/S1070427217020057