Ceramics-Silikáty 59, (4) 305 - 310 (2015) |
|
SYNTHESIS OF POROUS BOEHMITE NANOSTRUCTURES: EFFECTS OF TIME AND TEMPERATURE IN THE HYDROTHERMAL METHOD
|
Abdollahifar Mozaffar 1, Karami Ali Reza 2, Hagnnazari Nahid 1,
Karami Changiz 1
|
1 Department of Chemical Engineering, College of Science, Kermanshah Branch, Islamic Azad University,
Kermanshah 67131, Iran
2 Department of Chemistry, College of Science, Shahid Rajaee Teacher Training University,
Tehran 13761, Iran
|
Keywords: Boehmite, Nanostructures, Hydrothermal processing, Mesopores, Specific surface area
|
A hydrothermal approach has been employed for the synthesis of different morphologies of porous γ-AlOOH nanostructures
using Al(NO3)3 and urea as raw materials with urea/nitrate molar ratio of 2. The effect of time and temperature of hydrothermal
reaction on the morphologies of synthesized γ-AlOOH were investigated. Samples subjected to different reaction durations
from 6 h to 24 h and various temperatures were prepared. The samples were characterized by X-ray diffraction (XRD),
transmission electronic microscopy (TEM), field emission scanning electron microscope (FESEM), Fourier transform
infrared spectrometry (FTIR) and N2 adsorption/desorption. X-ray powder diffraction indicated that all samples were
single-phase γ-AlOOH. Our results showed that a change in the synthesis conditions may lead to marked differences in
the morphology of porous γ-AlOOH. The surface area of samples decreases with increasing of reaction temperature and
decreasing time duration in hydrothermal route. |
Record in: Scopus | Web of Science |
 PDF (1.5 MB) |
|
