Adsorption of short chain carboxylic acids from aqueous solution by swellable organically modified silica materials

Adsorption ◽  
2017 ◽  
Vol 24 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Paul L. Edmiston ◽  
Alyssa R. Gilbert ◽  
Zachary Harvey ◽  
Noël Mellor
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acids ◽  
Short Chain ◽  
Modified Silica ◽  
Silica Materials ◽  
Organically Modified ◽  
Organically Modified Silica

Absorption of short-chain to long-chain perfluoroalkyl substances using swellable organically modified silica

2019 ◽  
Vol 5 (11) ◽  
pp. 1854-1866 ◽  
Author(s):  
Eva K. Stebel ◽  
Kyndal A. Pike ◽  
Huan Nguyen ◽  
Heather A. Hartmann ◽  
Mattaeus J. Klonowski ◽  
...  
Keyword(s):  
Short Chain ◽  
Perfluoroalkyl Substances ◽  
Modified Silica ◽  
Wide Range ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Long Chain

Adsorbents comprising swellable organically modified silica were characterized to optimize the adsorption of a wide range of perfluoroalkyl substances from water.

scholarly journals Favourable influence of hydrophobic surfaces on protein structure in porous organically-modified silica glasses

Biomaterials ◽  
2008 ◽  
Vol 29 (18) ◽  
pp. 2710-2718 ◽  
Author(s):  
Bouzid Menaa ◽  
Mar Herrero ◽  
Vicente Rives ◽  
Mayya Lavrenko ◽  
Daryl K. Eggers
Keyword(s):  
Protein Structure ◽  
Modified Silica ◽  
Hydrophobic Surfaces ◽  
Silica Glasses ◽  
Organically Modified ◽  
Organically Modified Silica

scholarly journals Template-Free Synthesis of Organically Modified Silica Mesoporous Thin Films for TNT Sensing

2010 ◽  
Vol 2 (10) ◽  
pp. 2892-2897 ◽  
Author(s):  
Adem Yildirim ◽  
Hulya Budunoglu ◽  
Hakan Deniz ◽  
Mustafa O. Guler ◽  
Mehmet Bayindir
Keyword(s):  
Thin Films ◽  
Modified Silica ◽  
Mesoporous Thin Films ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Template Free

A photorefractive organically modified silica glass with high optical gain

Nature ◽  
2000 ◽  
Vol 408 (6808) ◽  
pp. 64-67 ◽  
Author(s):  
Pavel Cheben ◽  
Francisco del Monte ◽  
Dennis J. Worsfold ◽  
Dave J. Carlsson ◽  
Chander P. Grover ◽  
...  
Keyword(s):  
Silica Glass ◽  
Optical Gain ◽  
Modified Silica ◽  
Organically Modified ◽  
Organically Modified Silica

Organically Modified Silica-Based Xerogels Derived from 3-Aminopropyltrimethoxysilane and 3-Isocyanatepropyltriethoxysilane through Carboxylic Acid Solvolysis

2006 ◽  
Vol 514-516 ◽  
pp. 108-112 ◽  
Author(s):  
Lianshe Fu ◽  
Rute A. Sá Ferreira ◽  
Sonia S. Nobre ◽  
Luís D. Carlos ◽  
João Rocha
Keyword(s):  
Acetic Acid ◽  
Carboxylic Acid ◽  
Valeric Acid ◽  
Silica Xerogels ◽  
X Ray Diffraction ◽  
Modified Silica ◽  
13C Nuclear Magnetic Resonance ◽  
Organically Modified ◽  
Cross Links ◽  
Organically Modified Silica

Organically-modified silica xerogels from 3-aminopropyltrimethoxysilane (APTES) and 3-isocyanatepropyltriethoxysilane (ICPTES) have been synthesized through carboxylic acid (formic acid, acetic acid and valeric acid) solvolysis. The resulting hybrid materials have been characterized by powder X-ray diffraction, mid-infrared spectroscopy, 29Si and 13C nuclear magnetic resonance, and photoluminescence spectroscopy. The results show that urea cross-links have been formed in these hybrids. The luminescence features depend on the selected carboxylic acids. For example, comparatively to the hybrids derived from formic and acetic acid solvolysis, valeric acid shows a red-shift of the emission features.

scholarly journals Cross-Condensation Reactions in an Organically Modified Silica Sol-Gel

1994 ◽  
Vol 346 ◽  
Author(s):  
S. Prabakar ◽  
R. A. Assink ◽  
N. K. Raman ◽  
C. J. Brinker
Keyword(s):  
Experimental Error ◽  
Molecular Level ◽  
Sol Gel ◽  
Resonance Assignments ◽  
Silica Sol ◽  
Modified Silica ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Acid Catalyzed ◽  
Hydrolysis Of

ABSTRACTHigh resolution 29Si NMR has been used to study the extent of cross condensation taking place in a hybrid organic/inorganic sol-gel system. Tetraethoxysilane (TEOS) and methyltriethoxysilane (MTEOS) sol-gels were chosen for this purpose. The sols were prepared by acid catalyzed hydrolysis of TEOS and MTEOS with a H2O/Si ratio of 0.3. 29Si NMR shows signals due to both self-condensation and cross-condensation between TEOS and MTEOS. Resonance assignments were made by comparing the positions and intensities of peaks in the spectra of single and multicomponent systems. It was found that, within experimental error, the self- and cross-condensation rates are equal and that extensive molecular level mixing takes place during the early stages of the reaction.

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