The Anatase-to-Rutile Phase Transition in Highly Oriented Nanoparticles Array of Titania with Photocatalytic Response Changes

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Abstract
An array of highly oriented anatase nanoparticles was successfully prepared from NH4TiOF3 with the assistance of polyetheleneglycol-400 at 450 °C. The study showed the stability of obtained layered TiO2-anatase close to 1200 °C. This research confirmed for the first time that the transition of mesocrystalline anatase to the rutile phase occurs between 1000 °C and 1200 °C, which is more than 400 °C higher than the transition of bulk TiO2 due to the used precursor. A small quantity of K-phase nanowhiskers, which issued after 800 °C in the composite based on TiO2, stimulated a fourfold increase in photocatalytic performance. This study offers a new approach to the construction and preparation of effective nanocrystalline photocatalyst.
Funding Information
  • Russian Science Foundation (22-29-00963)

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