Microstructural evolution of titania nanocrystallites by a hydrothermal treatment: A HRTEM study

Walid A. Daoud, John Haozhong Xin, G. K H Pang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)

Abstract

Nanocrystalline anatase titanium dioxide films were formed by a hydrothermal treatment at temperatures below 100°C. The microstructural evolution of the crystallites was monitored by high-resolution transmission electron microscopy (HRTEM). HRTEM analysis of the as-grown film revealed the presence of nanocrystalline brookite TiO 2 within an amorphous matrix. After 90 min of the hydrothermal treatment, the TiO 2 nanoparticles remained of brookite form and a small increase in grain size was observed. Intergranular amorphous TiO 2 between the nanoparticles was observed in both as-grown and 90-min-treated films. However, after further 90 min of the treatment, TiO 2 nanoparticles were transformed into anatase phase with a rapid growth in grain size.
Original languageEnglish
Pages (from-to)443-446
Number of pages4
JournalJournal of the American Ceramic Society
Volume88
Issue number2
DOIs
Publication statusPublished - 1 Dec 2005

ASJC Scopus subject areas

  • Ceramics and Composites

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