Abstract
Abstract The effects of drying on the physical properties of mesoporous silica nanoparticles (MSNP), which were synthesized by hydrolysis and condensation of TEOS, where studied using the freeze-drying (FD) and alcohol-desiccation (AD) methods. Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FTIR), dynamic light scattering (DLS), zeta potential and N2 adsorption-desorption techniques were used to characterize the as-prepared particles. Electronic microscopy showed that silica nanoparticles are homogenous, spherical shape and discrete in nature. FTIR analysis indicated no significant spectral distinction between FD and AD particles; DLS showed a slightly bigger hydrodynamic radius for AD particles while zeta potential did not differ significantly for those particles. Finally, N2 adsorption-desorption showed that the surface area and pore size varied slightly between the two samples. The results suggested that there no exists a noticeable difference between MSNPs that were dried through freeze-drying or alcohol-dehydration methods.
Published Version
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