Open AccessInfluence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains
Author(s) -
Maja Kokunešoski,
Zvezdana Baščarević,
Zlatko Rakočević,
Aleksandra Šaponjić,
Djordje Šaponjić,
Dragana Jordanov,
Biljana Babić
Publication year - 2018
Publication title -
science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos1801111k
Subject(s) - materials science , copolymer , mesoporous material , desorption , poloxamer , chemical engineering , morphology (biology) , adsorption , specific surface area , composite material , catalysis , polymer , chemistry , organic chemistry , engineering , biology , genetics
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.
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