Evaluation of heat temperatures on the structure of nano-rod

Document Type : Original Research Paper

Author

Biomaterials Dep, University of Toronto

10.22034/jna.2021.685868

Abstract

In this project, the TiO2 nanorods were synthesized from P25 TiO2 nanoparticles
by the hydrothermal method in 20 M NaOH solution. The effects of annealing
temperatures on produced nanorods were investigated by scanning electron
microscopy (SEM) X-ray diffraction (XRD) and photoluminescence (PL)
spectroscopy. An increase of annealing temperature over 300 °C has no effect on the
size of produced nanorods, but due to reduction of the surface charge causes the
more compact products. In addition, the surface defects of synthesized 1D TiO2
were decreased because of an increase in annealing temperatures, but we should
note that at higher temperatures (over 500 °C) the TiO2 phase may be converted
from anatase to rutile.Diameter growth and changes of surface oxygen defects of
synthesized Nanorods are studied with increasing annealing temperatures. Also,
with an increase in annealing temperature over 300 °C, there is no effect on the size
of produced nano-rods, but due to reduction of the surface charge causes the
more compact products.

Keywords