The presented work focuses on the synthesis of silica-based macroporous aggregates composed silica nanoparticles using a template-free method. To improve mechanical strength prepared fractal-like aggregates, precursor tetraethyl orthosilicate (TEOS) is used during nanoparticle aggregation. obtained results confirm possibility to tailor pore size distribution (PSD) simply by primary particles va...

Objective(s): The use of cationic surface-active agents (surfactant) in the synthesis of nanoparticles, with formation of micelle, can act as a template for the formation of meso-porous silica. Changes in the concentration of surfactants can affect the structures and properties of the resulting nanoparticles.Materials and Methods: Magnetite nanoparticles were prepared as cores using the c...

Efficient and selective conversion of renewable feedstocks to essential chemicals fuels applying green sustainable catalytic processes is central importance attracts scientific interest. Among different biomass-based feedstocks, 5-hydroxymethylfurfural (HMF) represents valuable platform compound widely used for the synthesis chemicals, fuels, polymers. Here we report cobalt nanoparticles cataly...

Here we consider the lyotropic liquid crystals and their role in templating scaffolds of mesoporous silica materials. It was 1992 that a Mobil Research group disclosed method to produce particles having regular network pores with hexagonal cubic symmetries. The proposed as liquid-crystal 'templating' mechanism. Since symmetries resulting are those observed mesophases crystals, supposed presence...

in this work, we report synthesis of superparamagnetic iron oxide nanoparticles at room temperature using microemulsion template phase consisting of cyclohexane, water, cetyltrimethylammonium bromide ctab as cationic surfactant and butanol as a cosurfactant. silica surface modification of the as prepared nanoparticles was performed by adding tetraethoxysilane teos to alkaline medium. the struct...

ordered mesoporous carbon cmk-3 (omc) have been synthesized using mesoporous sba-15 silica as template and modified with cobalt carbonate. morphologies and surface texturing of materials werecharacterized by x-ray diffraction (xrd), scanning electron microscopy (sem) and n2 adsorption-desorptionisotherms. the cobalt modified ordered mesoporous carbon were found to have a surface area of 490.06m...