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

Paramaconi Rodriguez, Yayun Pu, Qianwen Chen, Zongzhao Sun, Limin Huang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
231 Downloads (Pure)

Abstract

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
Pages (from-to)3298-3304
JournalCrystal Growth and Design
Volume19
Issue number6
DOIs
Publication statusPublished - 23 Apr 2019

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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