Transformation from anatase to rutile titania using hydrothermal method: Investigation of morphology and thermal stability

Mpanza P. Ntsikelelo, Malevu D. Thembinkosi, Lehloonolo F. Koao, Motloung V. Setumo, Motaung E. Tshwafo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Titanium dioxide nanoparticles were successfully synthesized using the hydrothermal method in an autoclave at 100 °C. The onset of the formation of the rutile phase from 400 to 700 °C was investigated through the morphology, structure and thermal properties. X-ray diffractometer and Raman spectroscopy confirmed the formation of a hybrid anatase (A) and rutile (B) phase at 400 °C. The nanoparticles formed spherical structures with an average size between 19.799 and 38.685 nm. Thermogravimetric analysis confirmed that a TiO2 nanocrystal subjected to higher temperatures undergoes four degradation stages involving the desorption of water molecules, the loss of organic compounds, and the phase change from amorphous to crystalline anatase.

Original languageEnglish
Pages (from-to)1511-1522
Number of pages12
JournalSensors and Materials
Volume32
Issue number4
DOIs
Publication statusPublished - 30 Apr 2020
Externally publishedYes

Keywords

  • Annealing temperature
  • Nanocrystal
  • Phase transformation
  • Titanium dioxide

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