Anomalous phase transition of layered lepidocrocite titania nanosheets to anatase and rutile

Research output: Contribution to journalArticlepeer-review


Colleges, School and Institutes


In this study, phase transformations from lepidocrocite titania nanosheets (L-TiO2) to rutile (R-TiO2) and anatase (A-TiO2) have been systematically investigated as a function of the preparation conditions, such as pH and freeze drying, and as a function of the temperature treatment. We have found that the transformation of (L-TiO2) into rutile takes place upon freeze drying treatment. We report that temperature determined the final phase-structure in the transition phase of the L-TiO2 nanosheets into TiO2 nanoparticles, while the pH determined the final morphology and particle size. Based on the experimental results, two different transition pathways of dissolution-recrystallization and topologically rolling transition have been proposed. Our results give a full map of phase transition and morphology evolution of L-TiO2 to R-TiO2/A-TiO2 that can provide guideline to new materials design, especially for the photocatalysts.


Original languageEnglish
JournalCrystal Growth and Design
Publication statusPublished - 23 Apr 2019