Influence of synthesis parameters on the physico-chemical characteristics of SBA-15 type ordered mesoporous silica

Benamor, Taissire; Vidal, Loı̈c; Lebeau, Bénédicte; Marichal, Claire

doi:10.1016/j.micromeso.2011.12.016

Cited by 87 publications

(83 citation statements)

References 55 publications

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“…Dual-mesoporous material preparation: Meso-mesoporous materials have been prepared from the cooperative templating mechanism (CTM), according to synthesis procedures that lead to the formation of well ordered mesopores networks by using pure R F 8 (EO) 9 [37] or pure P123 [38] as template, denoted below as fluorinated conditions and Pluronic conditions respectively. Tetramethoxysilane (TMOS) is used as the silica source and is added dropwise into the micellar solution at 20 °C.…”

Section: Methodsmentioning

confidence: 99%

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer

2015

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We report here the synthesis of different kinds of hierarchical porous silica materials by using mixtures of an amphiphilic block copolymer (Pluronic P123) and a nonionic fluorinated surfactant. In particular, we have taken advantage of the difference in polarities between the two compounds to design dual-mesoporous materials through the cooperative templating mechanism (CTM). We have undertaken a complete study of this system by varying the composition of the mixed micelles and the synthesis conditions. We have shown that both the dual-mesoporosity and the mesopore ordering are favored when materials are prepared with fluorinated-rich and P123-rich micelles. However, when the rich-Pluronic micelles predominate the mesostructure is less organized and the dual-porosity depends on the P123 content.

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Section: Methodsmentioning

confidence: 99%

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer

2015

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“…By simply modifying temperature and stirring rate, while keeping molar ratios as parameters, it is possible to synthesize a [20,21] J Sol-Gel Sci Technol variety of particles such as rods [32][33][34][35][36][37], beans [18,35,38], rice [33,35] or hexagons [33,39,40]. Although there have been some studies on the formation mechanism [41,42] and the influence of synthesis conditions on their morphology [34,35], SBA-15 MSN could not be found in any report in the consulted literature. It may be argued that the spherical form is always the preferred one [43].…”

Section: Sizes and Morphologiesmentioning

confidence: 99%

Colloidal and spherical mesoporous silica particles: synthesis and new technologies for delivery applications

Beltrán-Osuna

Perilla

2015

J Sol-Gel Sci Technol

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Continuous research in prominent fields such as biotechnology, biomedicine and nanopharmaceutics has brought the development of a widespread class of materials, and studies for mesoporous materials have been exponentially growing lately. The purpose of this review is to provide a useful guide for different materials, methods and configurations that have been reported in the last 5 years for the synthesis of spherical mesoporous silica particles (MSP), in the colloidal size range (1-1000 nm). MSP exhibit several limitations that must be overcome in order to enable their medical and clinical use. Surface modification of these particles will allow getting new promising characteristics of these materials, including better drug release control and biocompatibility improvement. These modified MSP could be potentially used in many biomedical applications, especially for drug delivery systems. Emphasis is made on the pore size, diameter and shape of the final particles since these parameters will establish key characteristics, i.e., drug delivery profile, loading capacity and efficiency. Graphical Abstract Spreading the use of mesoporous silica particles in biomedicine is possible by the improvement of its inner characteristics through surface modification. This may be done by chemical functionalization or by coating with macromolecular layers or brushes, thus creating novel responsive core-shell hybrid composites to be used as carriers for drug delivery applications.

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“…For example, in the original synthesis of SBA-15, 20 h of reaction time is used, but it has been shown that this time can be decreased to 2 h, [107], and even further down to 0.5 h [133]. This has been studied in Paper III-V.…”

Section: Kineticsmentioning

confidence: 99%

Mesoporous Building Blocks: Synthesis and Characterization of Mesoporous Silica Particles and Films

Björk¹

2013

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On the cover, the structure of SBA-15 is illustrated. Inside the pores SEM micrographs have been inserted showing (clockwise from the top): rods, fibers, a film consisting of rods grown on a substrate, a film consisting of platelets grafted on a substrate, short rods, and platelets. In the center the sheet morphology is presented.© Emma Björk, unless otherwise stated.ISBN: 978-91-7519-516-2 ISSN: 0345-7524 Printed by LiU-tryck, Linköping, Sweden, 2013 Research is formalized curiosity. It is poking and prying with a purposeZora Neale Hurston (1903Hurston ( -1960 i ABSTRACTCatalyst supports, drug delivery systems, hosts for nanoparticles, and solar cells are just some examples of the wide range of exciting applications for mesoporous silica. In order to optimize the performance of a specific application, controlling the material's morphology and pore size is crucial. For example, short and separated particles are beneficial for drug delivery systems, while for molecular sieves, the pore size is the key parameter.In this thesis, mesoporous silica building blocks, crystallites, with hexagonally ordered cylindrical pores were synthesized, with the aim to understand how the synthesis parameters affect the particle morphology and pore size. The synthesis of the particles is performed using a sol-gel process, and in order to increase the pore size, a combination of low temperature, and additions of heptane and NH 4 F was used. By variations in the amounts of reagents, as well as other synthesis conditions, the particle morphology and pore size could be altered. Separated particles were also grown on or attached to substrates to form films. Also, a material with spherical pore structure was synthesized, for the first time using this method.It was found that a variation in the heptane concentration, in combination with a long stirring time, yields a transition between fiber and sheet morphologies. Both morphologies consist of crystallites, which for the fibers are joined end to end, while for the sheets they are attached side by side such that the pores are accessible from the sheet surface. The crystallites can be separated to a rod morphology by decreasing the stirring time and tuning the HCl concentration, and it was seen that these rods are formed within 5 min of static time, even though the pore size and unit cell parameters were evolving for another 30 min. Further studies of the effects of heptane showed that the shape and mesoscopic parameters of the rods are affected by the heptane concentration, up to a value where the micelles are fully saturated with heptane. It was also observed that the particle width increases with decreasing NH 4 F concentration, independent of heptane amount, and a platelet morphology can be formed. The formation time of the particles decrease with decreasing NH 4 F, and the growth mechanism for platelets was further studied. The pore sizes for various morphologies were altered by e.g. variations in the hydrothermal treatment conditions, or the method for removing the surfactants.ii T...

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Influence of synthesis parameters on the physico-chemical characteristics of SBA-15 type ordered mesoporous silica

Cited by 87 publications

References 55 publications

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer

Colloidal and spherical mesoporous silica particles: synthesis and new technologies for delivery applications

Mesoporous Building Blocks: Synthesis and Characterization of Mesoporous Silica Particles and Films

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Influence of synthesis parameters on the physico-chemical characteristics of SBA-15 type ordered mesoporous silica

Cited by 87 publications

References 55 publications

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene ­Fluoroalkyl Ether and Triblock Copolymer

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene ­Fluoroalkyl Ether and Triblock Copolymer

Colloidal and spherical mesoporous silica particles: synthesis and new technologies for delivery applications

Mesoporous Building Blocks: Synthesis and Characterization of Mesoporous Silica Particles and Films

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Product

Resources

About

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer

Hierarchical Meso‐Mesoporous and Macro‐Mesoporous Silica Templated by Mixtures of Polyoxyethylene Fluoroalkyl Ether and Triblock Copolymer