Crystallization of amorphous TiO2 nanotubes: A real-time synchrotron X-ray scattering study

Joo Hyeon Jeong, Kiyoung Lee, Tae Sik Cho

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We studied the crystallization behavior of 5 m-thick amorphous TiO2 nanotubes for renewable energy applications by performing real-time synchrotron X-ray scattering experiments during annealing in air and vacuum. The TiO2 nanotubes prepared by anodic oxidation were amorphous at room temperature. The crystallization temperatures of anatase and rutile phases of TiO2 were lower in vacuum than those in air because of the presence of oxygen vacancies caused by the oxygen deficiency. The crystalline rutile phase was formed through both the crystallization of the amorphous phase at low temperatures and transformation of the anatase phase at high temperatures both in air and vacuum. The rutile phase formed larger crystal domains at a lower crystallization temperature in vacuum when compared to the crystallization behavior in air.

Original languageEnglish
Pages (from-to)7824-7827
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume17
Issue number10
DOIs
StatePublished - Oct 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
Copyright © 2017 American Scientific Publishers All rights reserved.

Keywords

  • Annealing
  • Crystallization
  • Real-Time Synchrotron X-ray Scattering
  • Rutile and Anatase
  • TiO Nanotubes

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