نتایج جستجو برای: mesocellular silica foams
تعداد نتایج: 41449 فیلتر نتایج به سال:
a green, efficient and selective approach for the oxidation of sulfides to sulfoxides and sulfones with uhp at room temperature is reported. the reaction is performed in the presence of vanadia catalyst supported on mesocellular silica foam (mcf) with a v content ranging from 2% to 10% as heterogeneous and reusable catalyst. the structural and textural characterization of this catalyst were don...
Introduction: Reducing noise pollution has become an essential issue due to the increase in public concern and also social demands for a better lifestyle. Using sound absorption materials is a preferred method to reduce the noise pollution. Undesirable properties of pure polyurethane such as poor absorption of mechanical energy in narrow frequency ranges can be improved by providing polymeric n...
Via integrative chemistry, the first CoOx–SiO2(HIPE) self-standing monoliths of cobalt nano-oxides embedded within silica macro–mesocellular hosts have been prepared. These binary CoOx–SiO2 porous nanostructure (MUB-100(x)) materials present an average 95% porosity. We found out that high concentration maintains hexagonal-2D organization mesoscopic voids when applying thermal treatment at 700 °...
Abstract Large, ink‐bottle‐shaped pores in mesocellular foams (MCFs) are desired for various applications requiring enhanced mass transfer or the immobilization of larger compounds. Hence, cylindrical COK‐12, an ordered mesoporous silica structurally comparable to SBA‐15 but synthesized at room‐temperature quasi‐neutral pH, chemically swollen into ink‐bottle pores. Therefore, p ‐xylene is used ...
We demonstrate that magnetic mesocellular carbon foams (Mag-MCF-C) can be effectively used for enrichment and desalting of protein digests or peptides in matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The large mesocellular pores and surface area of Mag-MCF-C are likely to mainly contribute to high efficiency in enrichment and desalting of protein digests. The magneti...
• Cu particles supported on silica by strong electrostatic adsorption were smaller than 5 nm. The textural properties of the support impacted both conversion and selectivity. commercial fumed was more prone to suffer from deactivation mesoporous ones. over mesocellular foam provided higher metallic surface lower acidity. fluoride addition during synthesis shortened channels silica, decreasing d...
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