The synthesis of functional mesoporous materials

Fryxell, Glen E.

doi:10.1016/j.inoche.2006.06.012

Cited by 89 publications

(60 citation statements)

References 145 publications

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“…Numerous reviews of silica functionalization exist in the literature. [12][13][14][15] In a direct synthesis (also known as a one-pot synthesis), a silica precursor is polymerized in the presence of functional organosilanes in a single step. Using this route to functionalized silica materials, higher loadings of functional groups can be achieved and those groups can be well distributed within the silica matrix.…”

Section: Choice Of Silica Supportmentioning

confidence: 99%

Cooperative catalysis by silica-supported organic functional groups

2008

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Hybrid inorganic-organic materials comprising organic functional groups tethered from silica surfaces are versatile, heterogeneous catalysts. Recent advances have led to the preparation of silica materials containing multiple, different functional groups that can show cooperative catalysis; that is, these functional groups can act together to provide catalytic activity and selectivity superior to what can be obtained from either monofunctional materials or homogeneous catalysts. This tutorial review discusses cooperative catalysis of silica-based catalytic materials, focusing on the cooperative action of acid-base, acid-thiol, amine-urea, and imidazole-alcohol-carboxylate groups. Particular attention is given to the effect of the spatial arrangement of these organic groups and recent developments in the spatial organization of multiple groups on the silica surface.

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Section: Choice Of Silica Supportmentioning

confidence: 99%

Cooperative catalysis by silica-supported organic functional groups

2008

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“…The capacity of these substances to micellize at relatively low concentrations [1] suggested they could perform as templates in the synthesis of nanostructured inorganic oxide particles. Indeed, these materials are currently attracting much attention for applications as catalysts, [6] membranes, [7] sensors, [8] and nanoelectronics. [9] The ability to fabricate these devices took an important step forward when it was discovered that micellar liquid crystal phases can act as templates for the synthesis of tailored, organized mesoporous materials; [10] that is, materials having pore diameter between 2 and 50 nm.…”

Section: Introductionmentioning

confidence: 99%

A Waste‐Derived Biosurfactant for the Preparation of Templated Silica Powders

et al. 2010

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A polymeric anionic biosurfactant isolated from urban bio-wastes was used as a template for fabricating silica powders of pore size ranging from 4 to 30 nm by the sol-gel reaction of tetraethylorthosilicate and 3-aminopropyltriethoxysilane at pH 5. The morphology of the synthesized silica powders was found to depend on the size and the conformation of the biosurfactant molecules or aggregates in solution. The use of waste-derived biosurfactants as templating agents reduces the fabrication costs and the environmental impact of mesoporous materials. At the same time, it encourages the upgrade of bio-wastes from a costly disposal matter to a source of chemicals and therefore, of revenue.

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“…In the former case, the most usual method is doping of reaction m elange with metal salts [15]. In post-synthetic approach, the most common synthesis routes are: I) incipient wetness impregnation [16]; II) ion exchange [17]; III) equilibrium adsorption [18]; IV) metal complex immobilization [19]; V) vapor phase deposition [20]; and VI) sonication [21][22][23][24]. One of the interesting applications of mesoporous materials is adsorption of hazardous gases.…”

Section: Introductionmentioning

confidence: 99%

H2S Removal Using ZnO/SBA-3: New Synthesis Route and Optimization of Process Parameters

2017

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Abstract. H 2 S is a major toxic compound that could be found in air, water, and fossil fuels and causes some bad e ects such as acidic rain and corrosion. In the present work, SBA-3 (Santa Barbara University no. 3) with three di erent weight percentages of ZnO, namely, 5%, 10%, and 15%, was synthesized via an in situ approach. All synthesized samples were characterized using atomic absorption spectrometry, X-Ray Di raction (XRD), nitrogen adsorption, and Transmission Electron Microscopy (TEM). The obtained results from XRD and nitrogen adsorption con rmed that all the samples almost retained their ordered structure after incorporation of ZnO nanoparticles within the mesopores of SBA-3. TEM images showed that ZnO nanoparticles were arranged along the direction of mesopores of SBA-3. Then, adsorption of H2S from a model gas was investigated. A three-factor Box-Behnken design with ve center points and one response was performed for the evaluation of e ect of three process parameters, namely, ZnO wt%, space velocity, and temperature, on the adsorption of H 2 S and a quadratic model (r 2 : 0.9185) was developed to navigate the design space. Temperature had the largest and space velocity had the lowest e ect on the breakthrough of H 2 S. The optimum breakthrough time (t bp ) was 588 min.

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The synthesis of functional mesoporous materials

Cited by 89 publications

References 145 publications

Cooperative catalysis by silica-supported organic functional groups

Cooperative catalysis by silica-supported organic functional groups

A Waste‐Derived Biosurfactant for the Preparation of Templated Silica Powders

H2S Removal Using ZnO/SBA-3: New Synthesis Route and Optimization of Process Parameters

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