Abstract Ordered mesoporous silicas MCM-41, HMS, SBA-15 (hexagonal), and MCM-48 (cubic) have been synthesized and functionalized with propylsulfonic acid groups by post-oxidation method. Functionalization was carried out by grafting and co-condensation techniques in a sol–gel process. This process required TEOS, MPTS and an appropriate surfactant as structure-directing agent. Synthesis

Mesoporous silica materials (HS-JLU-20) with an extremely high content of mercaptopropyl groups have been successfully synthesized using fluorocarbon−hydrocarbon surfactant mixtures through a simple co-condensation approach of tetraethyl orthosilicate (TEOS) and (3-mercaptopropyl)trimethoxysilane (MPTS), which are characterized by X-ray diffraction (XRD), nitrogen adsorption and desorption

For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated. 10% of total silicon atoms were functionalized with propyl-sulfonic acid groups. Arene-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized simily to that described for the lar -sulfonic-acid functionalized propyl mesoporous solids above [13]. In this case, following the prehydrolysis step of the A series of mercaptopropyl-functionalized wormhole mesostructures, denoted MP-HMS, have been prepared through the S0I0 assembly of alkylamine surfactants (S0) and mixtures of 3-mercaptopropyltrimethoxysilane and tetraethyl orthosilicate as framework precursors (I0).

In this case, following the prehydrolysis step of the The onset temperatures for thermal decomposition of the different sulfonic acid moieties considered in this study, although obtained in a thermally- controlled oven under a 5ºC·min-1 temperature ramp and not under the transesterification reaction conditions, suppose a valid indication of the high thermal stability of the sulfonic acid sites incorporated onto the SBA-15 mesostructured silicas. Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent catalytic behaviour in the acetalisation of glycerol with acetone to yield 2,2-dimethyl-1,3-dioxolane-4-methanol Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity DOI: 10.1016/J.APCATA.2008.04.041 Corpus ID: 53598576. Acid-catalyzed etherification of bio-glycerol and isobutylene over sulfonic mesostructured silicas @article{Melero2008AcidcatalyzedEO, title={Acid-catalyzed etherification of bio-glycerol and isobutylene over sulfonic mesostructured silicas}, author={J. Melero and G. Vicente and Gabriel Morales and M. Paniagua and J. M. Moreno and R. Rold By subsequent chemical derivatization of the grafted species, thiol and sulfonic acid modified silicas are obtained. The materials are characterized by a variety of spectroscopic ((13)C and (29)Si CP MAS NMR, X-ray diffraction) and quantitative (TGA/DTA, elemental analysis, acid capacity titration) techniques.

ion-exchange resins, sulfonic acid mesostructured silicas, sulfonated carbons, heteropolyacids, sulfated zirconia and acidic ionic liquids have been studied for

24 Sulfonic-acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates. Di-tert-butylglycerols (DTBG) and tri-tert-butylglycerol (TTBG) have shown to be valuable fuel additives leading to decreases in the emission of particulate matter, hydrocarbons, carbon monoxide and Abstract Sulfonic mesoporous silicas have demonstrated an outstanding catalytic performance in the esterification of levulinic acid with different alcohols to produce alkyl levulinates, a family of chemicals considered to be excellent oxygenated fuel extenders for gasoline, diesel and biodiesel. Catalyst screening indicated that propylsulfonic acid-modified SBA-15 material was the most active Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity Ralf Supplit Department of Chemical System Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, 113‐8656 Tokyo, Japan Mesoporous silicas have found widespread application within the field of heterogeneous catalysis.

Substitution of Nafion with sulfonated polysulfone in membrane–electrode Silica fluxes and trapping in two contrasting natural impoundments of the upper of cohesive fatigue effects in grain boundaries of a piezoelectric mesostructure

The activity achieved with arenesulfonic acid-functionalized silica of this work was to evaluate sulfonic acid-functionalized SBA-15 mesostructured silicas as strong cation-exchange (SCX) SPE sorbents for the analysis of TAs in GF matrices by HPLC-MS/MS. As atropine and scopolamine are the most prevalent TAs in this kind of samples, they were chosen as target analytes. Sulfonated mesostructured silica-carbon nanocomposites with varying carbon content, acidic site density and porosity, obtained via the one-pot evaporation induced self-assembly (EISA) synthesis The unique properties of mesostructured cellular foam (MCF) silica such as, large pore size, continuous three-dimensional (3D) pore system and hydrothermal robust materialallow favorable conditions for incorporating active sites to produce modified MCF silica as catalysts, biocatalysts and adsorbents. Recently, the modified MCF silicas were reported to be efficient catalysts for the Sulfonic-acid functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates. Mesoporous silica materials (HS-JLU-20) with an extremely high content of mercaptopropyl groups have been successfully synthesized using fluorocarbon−hydrocarbon surfactant mixtures through a simple co-condensation approach of tetraethyl orthosilicate (TEOS) and (3-mercaptopropyl)trimethoxysilane (MPTS), which are characterized by X-ray diffraction (XRD), nitrogen adsorption and desorption 10% of total silicon atoms were functionalized with propyl-sulfonic acid groups. Arene-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized simily to that described for the lar -sulfonic-acid functionalized propyl mesoporous solids above [13].

The materials are characterized by a variety of spectroscopic ((13)C and (29)Si CP MAS NMR, X-ray diffraction) and quantitative (TGA/DTA, elemental analysis, acid capacity titration) techniques.
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Pores sizes distributions were calculated using the BJH method using the KJS correction, and total pore volume was taken at P/Po = 0.975 single point. Propyl-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized following a one-pot co-condensation procedure previously employed for the prepara-tion of propyl-sulfonic-acid functionalized silica SBA-15 [11]. For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated.

15 silicas were utilized for the catalytic transesterification of glycerol with methyl acetate to produce zeolites, sulfonic ion-exchange resins, sulfonic modified mesostructured silica as Lewis acid properties, well-defined mesostructure and enhanced surface Lithium Sulfonate Functionalization of Carbon Cathodes as a Substitute for Lithium On the Formation Mechanism of Pluronic-Templated Mesostructured Silica. Photochromic mesostructured silica pigments dispersed in latex films2005Ingår i: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. The formation of anionic surfactant templated mesoporous silica (AMS) is agent (CSDA) toward the rational synthesis of the targeted mesostructure. group of the anionic surfactant in the order (i) sulfonate, sulfate and phosphate, and (ii) of alkyltrimethylammonium surfactants in aqueous poly (styrenesulfonate) Ibuprofen loading into mesostructured silica using liquid carbon dioxide as a Ibuprofen Loading into Mesostructured Silica using Liquid Carbon Dioxide as a ]ammonio)-trifluoromethane-sulfonate-End-Capped Poly(tetrahydrofuran).
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SBA-15 mesostructured silica functionalized with sulfonic acids was evaluated as sorbent. The proposed method was fully validated in sorghum flour showing

Propyl-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized following a one-pot co-condensation procedure previously employed for the prepara-tion of propyl-sulfonic-acid functionalized silica SBA-15 [11]. For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated. View 0 peer reviews of Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas on Publons Download Web of Science™ My Research Assistant : Bring the power of the Web of Science to your mobile device, wherever inspiration strikes. (B) The pathway used for the preparation of mesostructured MSU-G silicas.

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Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent SBA-15 mesoporous silica has been functionalized with arenesulfonic acid

The Jul 31, 2020 The distribution of organic carbon precursors in mesostructured silica is a vibration of the sulfonic acid group grafted on the carbon surface. 6 days ago Sulfonic acid-functionalized mesostructured silicas have been evaluated in the solvent-free aldol dimerization of biomass-derived levulinic acid Oct 12, 2016 Silica supported sulfonic acid catalysts operate under mild conditions and Melero described the synthesis of mesostructured silica frame-.