Evaluation of heat temperatures on the structure of nano-rod
الموضوعات : Journal of Nanoanalysis
Hassan GHEISARI
1
(Biomaterials Dep, University of Toronto)
الکلمات المفتاحية: XRD, SEM, titanium dioxide (TiO2), photoluminescence (PL), Nano-rod,
ملخص المقالة :
In this project, the TiO2 nanorods were synthesized from P25 TiO2 nanoparticlesby the hydrothermal method in 20 M NaOH solution. The effects of annealingtemperatures on produced nanorods were investigated by scanning electronmicroscopy (SEM) X-ray diffraction (XRD) and photoluminescence (PL)spectroscopy. An increase of annealing temperature over 300 °C has no effect on thesize of produced nanorods, but due to reduction of the surface charge causes themore compact products. In addition, the surface defects of synthesized 1D TiO2were decreased because of an increase in annealing temperatures, but we shouldnote that at higher temperatures (over 500 °C) the TiO2 phase may be convertedfrom anatase to rutile.Diameter growth and changes of surface oxygen defects ofsynthesized Nanorods are studied with increasing annealing temperatures. Also,with an increase in annealing temperature over 300 °C, there is no effect on the sizeof produced nano-rods, but due to reduction of the surface charge causes themore compact products.
