Science of Sintering 2018 Volume 50, Issue 1, Pages: 111-121
https://doi.org/10.2298/SOS1801111K
Full text ( 631 KB)
Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains
Kokunešoski Maja (Vinča Institute of Nuclear Sciences, Belgrade)
Baščarević Zvezdana (Institute for Multidisciplinary Research, Belgrade)
Rakočević Zlatko (Vinča Institute of Nuclear Sciences, Belgrade)
Šaponjić Aleksandra (Vinča Institute of Nuclear Sciences, Belgrade)
Šaponjić Đorđe (Vinča Institute of Nuclear Sciences, Belgrade)
Jordanov Dragana (Vinča Institute of Nuclear Sciences, Belgrade)
Babić Biljana (Vinča Institute of Nuclear Sciences, Belgrade)
Mesoporous silica SBA-15 materials of high specific surface area (~700 m2
g−1) were synthesized by using block copolymer Pluronic P123 as template and
tetraethoxysilane as silica source. The obtained materials were
characterized by XRD, nitrogen adsorption - desorption measurements, SEM,
EDS and AFM analysis. It was found that small modifications of synthesis
conditions influenced the morphological features of the synthesized SBA-15
samples. The SEM analysis had shown that the SBA-15 synthesized at lower
temperature and longer time of reaction (80°C, 48 h) provided elongated
rod-shaped grains about 1μm long. The other sample synthesized at higher
temperature and shorter time of reaction (100 °C, 24 h) had rounded grains
and grains of regular spherical shape with diameters ranging from 0.5 to 2
μm. The EDS analysis confirmed that the particles of both synthesized
samples were of the SiO2 content. In addition, the AFM analysis had shown
different surface morphologies of the materials synthesized under various
conditions.
Keywords: mesoporous material, SBA-15, synthesis conditions, nanostructures, spherical grains
Project of the Serbian Ministry of Education, Science and
Technological Development, Grant no. III-45012, Grant no. III-45005 and
Grant no. OI-172045