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

An array of highly oriented anatase nanoparticles was successfully prepared from NH4TiOF3 with the assistance of polyetheleneglycol-400 at 450 degrees C. The study showed the stability of obtained layered TiO2-anatase close to 1200 degrees C. This research confirmed for the first time that the transition of mesocrystalline anatase to the rutile phase occurs between 1000 degrees C and 1200 degrees C, which is more than 400 degrees C higher than the transition of bulk TiO2 due to the used precursor. A small quantity of K-phase nanowhiskers, which issued after 800 degrees 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.

Automated summary

The research successfully prepared highly oriented anatase nanoparticles and found that the transition temperature from mesocrystalline anatase to rutile phase is 400 degrees Celsius higher than bulk TiO2. The formation of a small quantity of K-phase nanowhiskers after 800 degrees Celsius in the TiO2-based composite stimulated a fourfold increase in photocatalytic performance.