Textural properties of ordered nanoporous silica synthesized on mesogenic template
نویسندگان
چکیده
Several synthesis routes have been developed and correlations between the variables of procedure physicochemical properties nanoporous silica materials MCM-48 type deposited by template method in presence a low-valent iron (II) cation investigated. Changes structure mesoporous framework, its textural degree energy inhomogeneity surface were studied depending on Fe/Si molar ratio, pH values (4 9 units), stepwise calcination (673 923 K) extraction cetylpyridinium with ethanol from xerogels.
منابع مشابه
Ordered Nanoporous Carbon Structures Synthesized Using Large-pore Mesoporous Silica Templates
Poly(alkylene oxide)-type block copolymers have been recently shown to be particularly versatile as structure-directing agents for the preparation of ordered large-pore mesoporous silica materials. In principle, the structure direction is achieved through the formation of periodic supramolecular self-assemblies between the polymeric surfactants and a silica source in the aqueous solution. The o...
متن کاملSynthesis of Metastable Au-Fe Alloy Using Ordered Nanoporous Silica as a Hard Template
Nanoporous Au-Fe alloy was synthesized via a wet chemistry route using ordered nanoporous silica as a hard template. The nanoporous Au-Fe consisted of aligned arrays of nanopores that were uniform in composition and ordered in hexagonal lattice, whereas Au-Fe nanoparticles synthesized without templates exhibited broad dispersions in the chemical composition and/or particle size. Nanoporous Au-F...
متن کاملEffect of Synthesis Conditions on Textural Properties of Silica MCM-41
Several samples of mesoporous silica were prepared via sol-gel chemistry in the presence of CTAB as template with variation of stirring intensity and aging time, ratios of CTAB/SiO2 and NH4OH/H2O in synthesis mixture. Effects of aging temperature, hydrothermal treatment and ter-Butanol addition to the synthesis mixture on the textural properties of obtained samples were also studied. Results of...
متن کاملOptimization of the nanoporous silicon structures by magnesiothermic reduction of the as-synthesized silica
Nanoporous silicon powder was produced via efficient magnesiothermic reduction. In this work, the thermal effect and reduction process time were investigated on the porous silicon structure. The nanoporous silicon powders were characterized by X-ray diffraction analysis and field emission scanning electron microscopy. The results demonstrate that porous structure was changed to homogeneous and...
متن کاملNeutron reflectivity study of lipid membranes assembled on ordered nanocomposite and nanoporous silica thin films.
Single bilayer membranes of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) were formed on ordered nanocomposite and nanoporous silica thin films by fusion of small unilamellar vesicles. The structure of these membranes was investigated using neutron reflectivity. The underlying thin films were formed by evaporation induced self-assembly to obtain periodic arrangements of silica and sur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ????? ???????????? ???????? ????? ????????
سال: 2023
ISSN: ['2524-2377', '2524-2369']
DOI: https://doi.org/10.29235/1561-8331-2023-59-2-125-138