Topic
Silica gel
About: Silica gel is a research topic. Over the lifetime, 22313 publications have been published within this topic receiving 325516 citations. The topic is also known as: Amorphous silica & Precipitated amorphous silica.
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TL;DR: In this article, a new derivative of β-cyclodextrin, monochlorotriazinylβ-cyclodesxtrin (β-CDMCT), is used for the reduction of pollutants in waste water.
Abstract: Different supports, containing a new derivative ofβ-cyclodextrin – monochlorotriazinylβ-cyclodextrin (β-CDMCT) – used forthe reduction of pollutants in waste water, have beenprepared. They are based on silica gel, initially eithercoated with polyethyleneimine (PEI) or grafted with3-aminopropyltrimethoxysilane, functionalized in asecond step with β-CDMCT. In order to obtainsorbents with high β-cyclodextrin content andmaximum accessibility of the β-CD cavity, thefuntionalization was studied while varying experimentalconditions. Thermogravimetry, Raman spectroscopy,specific surface area and pore size distribution were usedfor the characterization of supports. Sorption experimentsshow that these sorbents have sorption capacities towardssome organic pollutants. The mechanism of sorption is bothphysical adsorption in the polymer network (for supportsobtained by coating) and/or the formation of an inclusioncomplex between β-CDMCT and guest molecules.
90 citations
TL;DR: A resinous functionalized polymer, aniline formaldehyde condensate (AFC) coated on silica gel was used as an adsorbent to remove copper (Cu 2+ ) from aqueous solution under conditions of different initial Cu 2+ concentration, adsorbents loading, pH and adsorption time as discussed by the authors.
90 citations
TL;DR: In this article, the effects of the weight ratios of Gel to MCM-41, amine loadings, adsorption temperatures, and CO 2 partial pressures at different temperatures were investigated in a self-assembled fixed bed reactor.
90 citations
TL;DR: New optical sensors for trace amounts of oxygen are based on platinum(II) and palladium( II) complexes of 5,10,15,20-meso-tetrakis-(2,3,4,5,6-pentafluorphenyl)-porphyrin covalently attached to the surface of amino-modified silica-gel particles.
90 citations