Interaction of titanium oxide with sodium hydroxide at hydrothermal conditions
https://doi.org/10.29235/1561-8331-2020-56-2-150-157
Abstract
Sodium titanates were obtained by hydrothermal treatment using titanium tetrabutoxide (ТBT), titanium tetroisopropoxide (TIPT), hydrated titanium dioxide (prepared by hydrolysis of titanium alkoxide) or air-dried TiO2 sol with a molar ratio of TBT/TIPT/TiO2: NaOH equal to 1:10–80, at the temperature 130–180 °C and treatment time 24–72 h. Samples were characterized by the adsorption method, X-ray phase analysis, scanning electron microscopy. The photocatalytic properties of nanostructured titanate in the H-form in the process of Rhodamine FL–BM photodegradation under UV-irradiation (K = 0.03–0.05 min–1), as well as the electrorheological properties, were evaluated. Partially hydrated sodium titanates as a filler of the electrorheological dispersion (the filler content of dispersion was 5 %) exhibited the shear stress of 50–60 Pa and the leakage current density of 1.0–1.5 μA/cm2 at an electric field strength of E = 4 kV/cm at a shear rate of 17.1 s–1.
Keywords
sodium titanate,
titanium dioxide,
electrorheological dispersions,
hydrothermal treatment,
morphology,
photocatalysis
Supporting agencies: The author thanks Z. A. Novikov – the employee of the laboratory of rheophysics and macrokinetics of the A.V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus for taking measurements of the electrorheological properties of dispersions based on the obtained samples.
About the Author
A. N. Murashkevich
Belarusian State Technological University
Belarus
Belarus
Anna N. Murashkevich – D. Sc. (Engineering), Professor
13a , Sverdlov Str., 220006, Minsk
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