Silylation from supercritical carbon dioxide: a powerful technique for modification of surfaces

Şanlı, Deniz; Erkey, Can

doi:10.1007/s10853-015-9281-9

Cited by 23 publications

(21 citation statements)

References 86 publications

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“…Surface modification of SiO 2 and other metal oxide surfaces by post-synthetic grafting has been previously carried out using supercritical CO 2 (scCO 2 ). [16,17] scCO 2 is considered a green solvent because it is nontoxic, non-flammable, has a moderate critical temperature and pressure (T c = 31.1 ºC, P c = 7.38 MPa) [18]. Furthermore CO 2 is a gas at atmospheric pressure and does not leave any residue.…”

Section: Introductionmentioning

confidence: 99%

Thiol group functionalization of mesoporous SiO 2 SBA-15 using supercritical CO 2

Tenorio

Morère

Carnerero

et al. 2018

Microporous and Mesoporous Materials

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Section: Introductionmentioning

confidence: 99%

Thiol group functionalization of mesoporous SiO 2 SBA-15 using supercritical CO 2

Tenorio

Morère

Carnerero

et al. 2018

Microporous and Mesoporous Materials

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“…Along this line, coupling in-situ characterization studies with computational atomic scale modeling should be extremely beneficial and accelerate the development of these materials for commercial applications. Surface modification of aerogels can enhance their properties, such as surface charge, surface energy, roughness, hydrophilicity, reactivity, electronic, magnetic, and mechanical properties (Sanli and Erkey, 2015). Using surface-modified aerogels as supports for bimetallic NPs can enhance the performance and even broaden the application range of this emerging class of nanocomposites.…”

Section: Discussionmentioning

confidence: 99%

A Remarkable Class of Nanocomposites: Aerogel Supported Bimetallic Nanoparticles

et al. 2020

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Aerogels are a unique class of materials due to their low density, high porosity, high surface area, and an open and interconnected pore structure. Aerogels can be organic, inorganic and hybrid with a plethora of surface chemistries. Aerogel-based products for thermal insulation are already in the market and many studies are being conducted in many laboratories around the world to develop aerogel-based products for other applications including catalysis, adsorption, separations, and drug delivery. On the other hand, bimetallic nanoparticles dispersed on high surface area carriers, which have superior properties compared to their monometallic counterparts, are used or are in development for a wide variety of applications in catalysis, optics, sensing, detection, and medicine. Investigations on using aerogels as high surface area carriers for dispersing bimetallic nanoparticles are leading to development of new composite materials with outstanding properties due to the remarkable properties of aerogels. The review focuses on the techniques to synthesize these materials, their properties, the techniques to tune their pore properties and surface chemistry and the applications of these materials.

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“…Supercritical solvents and, in particular, supercritical carbon dioxide (sc-CO 2 ) has gained world-wide attention in recent decades as a green processing media for the impregnation of porous matrices like wood, textile, monolithic and porous polymers with various solutes such as pharmaceutically active compounds, pesticides, or organometallic compounds, among others [1][2][3]. Sc-CO 2 is an environmentally friendly alternative to conventional organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of Retention Models in Supercritical Fluid Chromatography for Impregnation Process Design

et al. 2021

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The retention factor is the key quantity for the thermodynamic analysis of the retention mechanism in chromatographic experiments. In this work, we measure retention factors for moderately polar solutes on four silica-based porous matrices as stationary phases by supercritical fluid chromatography. Elution of the solutes is only possible with binary mixtures of supercritical carbon dioxide (sc-CO2) and modifier (methanol) due to the low polarity of pure sc-CO2. The addition of modifiers makes the retention mechanism more complex and masks interactions between solute and stationary phase. In this work, we develop and validate several retention models that allow the obtaining of retention factors in modifier-free sc-CO2. Such models pave the way for quantifying adsorption interactions between polar solutes and non-swellable porous matrices in pure sc-CO2 based on retention data obtained in sc-CO2/modifier mixtures. The obtained information will thereby facilitate the understanding and design of impregnation processes, which are often performed in modifier-free conditions.

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Silylation from supercritical carbon dioxide: a powerful technique for modification of surfaces

Cited by 23 publications

References 86 publications

Thiol group functionalization of mesoporous SiO 2 SBA-15 using supercritical CO 2

Thiol group functionalization of mesoporous SiO 2 SBA-15 using supercritical CO 2

A Remarkable Class of Nanocomposites: Aerogel Supported Bimetallic Nanoparticles

Development and Validation of Retention Models in Supercritical Fluid Chromatography for Impregnation Process Design

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