pp. 1511-1522
S&M2198 Research Paper https://doi.org/10.18494/SAM.2020.2649 Published: April 30, 2020 Transformation from anatase to rutile titania using hydrothermal method: Investigation of morphology and thermal stability [PDF] Mpanza P. Ntsikelelo, Malevu D. Thembinkosi, Lehloonolo F. Koao, Motloung V. Setumo, and Motaung E. Tshwafo (Received October 4, 2019; Accepted February 2, 2020) Keywords: titanium dioxide, nanocrystal, annealing temperature, phase transformation
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.
Corresponding author: Motaung E. TshwafoThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Mpanza P. Ntsikelelo, Malevu D. Thembinkosi, Lehloonolo F. Koao, Motloung V. Setumo, and Motaung E. Tshwafo, Transformation from anatase to rutile titania using hydrothermal method: Investigation of morphology and thermal stability, Sens. Mater., Vol. 32, No. 4, 2020, p. 1511-1522. |