Journal ArticleDOI
Quantification of water and silanol species on various silicas by coupling IR spectroscopy and in-situ thermogravimetry.
Jean-Paul Gallas,Jean-Michel Goupil,Alexandre Vimont,Jean-Claude Lavalley,Barbara Gil,Jean-Pierre Gilson,Olivier Miserque +6 more
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TLDR
Five silica samples (four precipitated silicas provided by commercial suppliers and one with the MCM-41 structure) have been studied by infrared spectroscopy and by a homemade thermogravimetry-infrared spectrum (TG-IR) setup to determine the integrated molar absorption coefficient of the (nu+delta)OH band and the amount of water adsorbed on silicas through the intensity of the deltaH2O band.Abstract:
Five silica samples (four precipitated silicas provided by commercial suppliers and one with the MCM-41 structure) have been studied by infrared spectroscopy and by a homemade thermogravimetry−infr...read more
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Silica Surface Features and Their Role in the Adsorption of Biomolecules: Computational Modeling and Experiments
TL;DR: Silica Surface Features and Their Role in the Adsorption of Biomolecules: Computational Modeling and Experiments / Albert Rimola;Dominique Costa;Mariona Sodupe;Jean-François Lambert; Piero Ugliengo.
Journal ArticleDOI
Processing pathway dependence of amorphous silica nanoparticle toxicity: colloidal vs pyrolytic.
Haiyuan Zhang,Darren R. Dunphy,Xingmao Jiang,Huan Meng,Bingbing Sun,Derrick Tarn,Min Xue,Xiang Wang,Sijie Lin,Zhaoxia Ji,Ruibin Li,Fred L. Garcia,Jing Yang,Martin L. Kirk,Tian Xia,Jeffrey I. Zink,Andre E. Nel,C. Jeffrey Brinker +17 more
TL;DR: This study emphasizes that not all amorphous silicas are created equal and that the unusual toxicity of fumed silica compared to that of colloidal silica derives from its framework and surface chemistry along with its fused chainlike morphology established by high-temperature synthesis and rapid thermal quenching.
Journal ArticleDOI
FTIR study of CO2 adsorption on amine-grafted SBA-15: Elucidation of adsorbed species
TL;DR: In this paper, in situ infrared spectroscopy was used to study the interaction of CO2 with amine-grafted SBA-15 surfaces to quantify the effect distinct tethered amine moieties have on the chemistry of CO 2 interacting with amines.
Journal ArticleDOI
Analysing and understanding the active site by IR spectroscopy.
TL;DR: In this critical review the main advances in the field are presented, both under the aspects of the in situ and operando approaches, and a broad view of the most authoritative literature of the domain is given.
Journal ArticleDOI
A continuous flow strategy for the coupled transfer hydrogenation and etherification of 5-(hydroxymethyl)furfural using Lewis acid zeolites.
Jennifer D. Lewis,Stijn Van de Vyver,Anthony J. Crisci,William R. Gunther,Vladimir K. Michaelis,Robert G. Griffin,Yuriy Román-Leshkov +6 more
TL;DR: It is found that the catalysts undergo a drastic deactivation for the etherification step while maintaining catalytic activity for the transfer hydrogenation step, which can be attributed to changes in the local environment of the metal sites.
References
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Journal ArticleDOI
The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms
Journal ArticleDOI
Application of large pore MCM-41 molecular sieves to improve pore size analysis using nitrogen adsorption measurements
TL;DR: In this paper, it was shown that the Kelvin equation for the hemispherical meniscus, corrected for the statistical film thickness, is in quite good agreement with an experimental relation between the pore size and the capillary condensation pressure.
Journal ArticleDOI
Tailored Porous Materials
Thomas J. Barton,Lucy M. Bull,Walter G. Klemperer,Walter G. Klemperer,Douglas A. Loy,Brian McEnaney,Makoto Misono,Peter A. Monson,Peter A. Monson,Guido Pez,George W. Scherer,James C. Vartuli,Omar M. Yaghi +12 more
TL;DR: In this paper, the authors present a review of current theoretical approaches to adsorption phenomena in five specific classes of porous materials: oxide molecular sieves, porous coordination solids, porous carbons, sol−gel-derived oxides, and porous heteropolyanion salts.
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Standard Nitrogen Adsorption Data for Characterization of Nanoporous Silicas
TL;DR: The nitrogen adsorption isotherm measured at 77 K in the relative pressure range from about 5 × 10-7 to 0.988 for a macroporous silica is reported in a tabular form as discussed by the authors.