JTek 75-2015-1

AMINE MODIFIED MESOSTRUCTURED SILICA
NANO PARTICLES ENHANCED ADSORPTION
OF PHENOL

Mesoporous silica nanoparticles (MSN) were synthesized and modified with (3-
aminopropyl) triethoxysilane (APTES) using co-condensation (co-MSN) and post-grafting
(post-MSN) methods. Both modification methods seem to alter the crystallinity, surface
area, and pore volume as compared to the unmodified MSN. The activity of all MSNs was
tested for the adsorptive removal of phenol. Co-MSN showed significantly good
adsorptivity towards 10 mg L-1 of phenols, followed by post-MSN and MSN. It was found
that the highest activity of co-MSN was resulted from the additional higher adsorption
energy from the quaternary alkylammonium groups (Si–C–C–C–[N+–(CH3)3]) of cationic
template and also from the amine group of the APTES functionalization, which showed
more advantages as compared to post-MSN and MSN.