Hydrothermal synthesis of mixed phase blue titanium dioxide from oxalate stabilised sols
by C. McNicoll; F. Abu Bakar; V. Golovko; T. Kemmitt
International Journal of Nanotechnology (IJNT), Vol. 14, No. 1/2/3/4/5/6, 2017

Abstract: Blue coloured titanium dioxide nanoparticles were synthesised by the hydrothermal treatment of oxalic acid stabilised titania sols in the presence of NH₄F as a modifying agent. The NH₄F concentration determined the phase of titania produced and influenced the shape of the rutile crystallites produced. The blue colour originated from the F-stabilised Ti³⁺ centres formed under the reaction conditions. Organic residues in the sol decomposed to generate a hydrogen-rich atmosphere. Photocatalytic activity studies revealed the rutile phase titania produced was extremely active for a given surface area when compared to P-25.

Online publication date: Fri, 24-Feb-2017

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