Zheng Haoquan - Postdoc - Stockholm University LinkedIn

SILICA - Dissertations.se

Porous silica material with palladium clusters embedded inside is an example of a potential material for hydrogen storage. 59 Nanoparticles with thin metal shells (typically gold) around silica core can absorb or scatter light over a wide spectral range. 60, 61 Such particles have applications in imaging and anticancer therapy. Abstract. Journal of Porous Materials 6, 19–24 (1999) ° c 1999 Kluwer Academic Publishers.

Mesostructured porous silica

The preponderance of these materials is made by sol–gel processing wherein soluble silica precursors are reacted to form amorphous networks composed of siloxane bonds. 2004-01-01 Mesostructured cellular foam (MCF) silica is a very interesting new mesoporous silica material. It is a class of three-dimensional (3D) materials with ultra-large me- sopores (up to 500 Å) that are hydrothermally robust [19-22]. In terms of the textural and framework struc- tures, MCF materials are composed of uniform spherical Two different carbon precursors were used: furfuryl alcohol and a phenolic resin (Novolak type).In the first case, the mesostructured silica was impregnated with paratoluene sulfonic acid (>98%, Aldrich) (0.5 M in ethanol) for 1h, filtered, washed with a small volume of ethanol and dried at 353 K. Afterwards, a volume of furfuryl alcohol (>98%, Merck) equal to the silica pore volume was added. This method is based on an organometallic approach consisting in mild decomposition of Ru(COD)(COT) (COD = g4-cycloocta-1,5-diene; COT = g6-cycloocta-1,3,5-triene) embedded inside mesostructured porous silica. The role assigned to the regular channels of MTS is to host and stabilize the metal nanoparticles. The proton conduction properties of mesostructured templated-porous silica functionalized with sulfonic acid groups, grafted within the pores, were determined in dry nitrogen, at 100% relative This indicates that the integration of mesostructured silica containing an organic ligand into a porous alumina membrane is useful for developing a membrane-based analytical chip.

The silica particle morphology of spherical mesoporous silica particles using the pore size of mesostructured materials to be able to use them in bioapplications, as well Jul 31, 2020 Strategic approach for NR/HMS conversion into MCS nanocomposites. The distribution of organic carbon precursors in mesostructured silica is a Dec 17, 2019 Natural rubber (NR)/hexagonal mesoporous silica (HMS) nanocomposites ( NRHMS) with enhanced thermal and hydrophobic properties were Mesostructured silica nanoparticles offer a unique opportunity in the field of biocatalysis thanks to their outstanding properties. The tunable pore size in the Self‐standing films of surfactant mesostructured materials have been prepared with Mesostructured Materials and the Conversion to Porous Silica Films.

Adrian Rennie - Uppsala universitet

2009-01-01 · Porous silica material with palladium clusters embedded inside is an example of a potential material for hydrogen storage. 59 Nanoparticles with thin metal shells (typically gold) around silica core can absorb or scatter light over a wide spectral range. 60, 61 Such particles have applications in imaging and anticancer therapy.

Sök publikationer — Åbo Akademi

The advantage of this tether is to create ethanolamine units upon reaction of the epoxy group with the amine functions of PEI. mesostructured silica has over the last several years attracted a lot of attention because of its multitude of possible applications [5,6]. The main characteristics of mesoporous silica is a high surface area, high porosity and tuneable pore size. These properties are often desirable in applications such as catalysis, separation and controlled release. Silica mesoporous SBA-15.

The role assigned to the regular channels of MTS is to host and stabilize the metal nanoparticles. The proton conduction properties of mesostructured templated-porous silica functionalized with sulfonic acid groups, grafted within the pores, were determined in dry nitrogen, at 100% relative This indicates that the integration of mesostructured silica containing an organic ligand into a porous alumina membrane is useful for developing a membrane-based analytical chip. This study reports an efficient method for the preparation of well-dispersed ruthenium nanoparticles of controlled size loaded into micelle-templated silica (MTS). This method is based on an organometallic approach consisting in mild decomposition of Ru(COD)(COT) (COD = g4-cycloocta-1,5-diene; COT = g6-cycloocta-1,3,5-triene) embedded inside mesostructured porous silica. A supported [Ru(dmp) 2 (Py@LUS)Cl]Cl complex (dmp = 2,9-dimethyl-1,10-phenantroline) was synthesised in LUS, a 2D hexagonal porous mesostructured silica, via a step-by-step approach for the sake of site isolation, unicity and localisation in the confined space of the nanopores of the silica matrix.
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They were later produced also at Mobil Corporation laboratories and named Mobil Crystalline Materials, or MCM-41. The initial synthetic methods did not allow to control the quality of the secondary level of porosity generated. Polyethylenimine (PEI) has been grafted on a 2D hexagonal mesostructured porous silica of MCM-41 type (LUS silica) using 3-glycidoxypropyltrimethoxysilane (GTMS) as a grafting agent to develop A novel synthetic route for the preparation of the porous silica by a supramolecular templating mechanism is reported. By depositing the precursor solution containing tetramethoxysilane and hexadecyltrimethylammonium chloride on glass plates at an elevated temperature (60°C), mesostructured silica-hexadecyltrimethylammonium chloride composites with the size of a few mm to a cm have been prepared. PDF | On Apr 10, 2021, Noramira Saad and others published Effects of Mesoporous Silica Addition on Electrochemical Properties of Carbon Electrode | Find, read and cite all the research you need on Acid-prepared mesostructures of silica were made with the p6, Pm3n, and the P63/mmc structures in the form of porous fibers 50 to 1000 micrometers in length, hollow spheres with diameters of 1 to 100 micrometers, and thin sheets up to 10 centimeters in diameter and about 10 to 500 micrometers in thickness.

These properties are often desirable in applications such as catalysis, separation and controlled release. Silica mesoporous SBA-15. 1 Product Result | Match Criteria: Description, Product Name EIS study of humidity sensor based on mesostructured porous silica thin film material. Vincenzo Esposito, Daniel Z. de Florio, J. Mio Bertolo, A. Bearzotti, Polyethylenimine (PEI) has been grafted on a 2D hexagonal mesostructured porous silica of MCM-41 type (LUS silica) using 3-glycidoxypropyltrimethoxysilane (GTMS) as a Mesoporous silica nanoparticles (MSNs) are silica nanoparticles with pores that range in diameter from 2 to 50 nm and have an overall diameter below 1 µm. Their range of pore sizes is consistent with the IUPAC definition of mesoporous1 and make them ideal materials for applications ranging from catalysis and environmen Mesostructured materials are a fairly new type of materials having pores in the mesoscopic range of 2-50 nm.
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Search results for porous silica at Sigma-Aldrich. Compare Products: Select up to 4 products. *Please select more than one item to compare Azobenzene-derivatized mesostructured silica particles loaded with guest molecules and release of the molecules from the pores by the back-and-forth wagging motion of light-activated azobenzenes. Magnetically separable mesostructured silica with an unobstructed pore system was fabricated through the deposition of cobalt nanoparticles on the outer surface of the submicron-sized silica particles.

However, by removing the organic template a porous inorganic material is received.
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Jan van Stam Karlstads universitet

Starting from mixture of fine emulsion and Pluronic P123 micelles, it is expected to obtain silicas with a controlled hierarchical mesoporosity. When the molar ratio of KCl/tetraethoxysilane is 2.15, the obtained HSPSS material is turned into uniform mesostructured vesicle silica spheres, which consist of many small diameter vesicle particles. Novel mesostructured silica nanotubes perpendicular to the substrate were successfully prepared by the use of porous alumina membranes as a template. The uniform mesopores arranged over the whole nanotube sheath were about 5.5 nm in diameter.

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Andreas Sundblom - Chalmers Research

SBA-16, prepared using the non-ionic Pluronic 127 triblock copolymer as a structure-directing agent, is an excellent support for catalytic nanoparticles because of its peculiar three In the present study, stabilizer caged fluorescent rhodamine B mesoporous silica particles with special shapes were prepared. The prepared particles have a An electrochemical resistive-type sensor device, with a mesoporous silica thin film as sensitive membrane, has been developed and characterised.

SILICA - Dissertations.se

These cobalt nanoparticles were further protected by a nanometer-thick carbon shell against acid erosion. Mesostructured silica tubes and rods were prepared by deposition of a prehydrolysed silica sol with surfactant onto the cylindrical pores of a polycarbonate (PC) membrane template, followed by calcination to remove the surfactant and membrane template. Mesostructured silica tubes and rods were prepared by deposition of a prehydrolysed silica sol with surfactant onto the cylindrical pores of a polycarbonate (PC) membrane template, followed by calcination to remove the surfactant and membrane template. First published on 6th February 2012. Polyethylenimine (PEI) has been grafted on a 2D hexagonal mesostructured porous silica of MCM-41 type (LUS silica) using 3-glycidoxypropyltrimethoxysilane (GTMS) as a grafting agent to develop sorbents for CO 2 capture.

When the molar ratio of KCl/tetraethoxysilane is 2.15, the obtained HSPSS material is turned into uniform mesostructured vesicle silica spheres, which consist of many small diameter vesicle particles. Novel mesostructured silica nanotubes perpendicular to the substrate were successfully prepared by the use of porous alumina membranes as a template. The uniform mesopores arranged over the whole nanotube sheath were about 5.5 nm in diameter. The mesoporous channels run parallel to the longitudinal axis of the tubes.