@article{article_338384, title={MAGNETIC MESOPOROUS SILICA NANOCOMPOSITES PREPARED WITH DIFFERENT SIZED Fe3O4: STRUCTURAL AND MAGNETIC PROPERTIES, CATALYTIC EFFECTS}, journal={Anadolu University Journal of Science and Technology A - Applied Sciences and Engineering}, volume={19}, pages={514–522}, year={2018}, DOI={10.18038/aubtda.338384}, author={Erdem, Sezer and Erdem, Beyhan and Öksüzoğlu, Ramis Mustafa}, keywords={Magnetic nanocomposites,Mesoporous silica,Esterification,Fe3O4,SBA-15}, abstract={<p class="MsoNormal" style="text-align:justify;line-height:normal;"> <span lang="en-gb" style="font-size:9pt;font-family:’Times New Roman’, serif;" xml:lang="en-gb">The magnetically separable mesoporous silica
nanocomposites were successfully prepared through a one-pot method including the
co-condensation of tetraethoxysilane (TEOS) as silica precursor and
3-mercaptopropyl trimethoxysilane (MPTMS) as functionalizing agent accompanied
with hydrogen peroxide for oxidation of mercapto groups and triblock copolymers
as structure directing agent in the presence of ferromagnetic and
superparamagnetic Fe <sub>3 </sub>O <sub>4 </sub>nanoparticles. By incorporating
the superparamagnetic (near zero coercivity) Fe <sub>3 </sub>O <sub>4 </sub>
nanoparticles to the mesoporous silica (SBA-15) and functionalizing with
sulfonic acid groups instead of ferromagnetic Fe <sub>3 </sub>O <sub>4 </sub>nanoparticles,
we developed versatile nanocomposite having superior properties with respect to
magnetism, catalysis and porosity. Reducing the particle size of Fe <sub>3 </sub>O <sub>4 </sub>
from the ferromagnetic regime to the superparamagnetic regime, the pore closure
could be eliminated because of the more open pore as well as saving magnetic
properties. </span> </p> <p> </p>}, number={2}, publisher={Eskisehir Technical University}