The chemical bonding of particulate photocatalysts to supporting material surfaces is of great importance in engineering more efficient and practical photocatalytic structures. However, the influence of such chemical bonding on the optical and surface properties of the photocatalyst and thus its photocatalytic activity/reaction selectivity behavior has not been systematically studied. In this i...

MWW type zeolites are characterized by the presence of zeolitic layers 2.5 nm thickness, containing 10-member ring sinusoidal channels inside and supercavities with 12-member openings located on their surfaces. Expansion pillaring layered increase access to active sites can enable or facilitate catalytic activity towards larger reactant molecules. This goal is explored in this work reporting ze...

SiO2-coated Cobalt Ferrite (CoFe2O4) nanoparticles were obtained by the hydrolysis of tetraethylorthosilicate in the presence of CoFe2O4 nanoparticles in co-precipitation. The effects of SiO2coating on the magnetic properties of CoFe2O4 nanoparticles were investigated. The structural, morphological and magne...

The mesoporous ZrFe2O4 nanocauliflowers were synthesized via the solvothermal method. The core-shell ZrFe2O4@SiO2 nanocomposite was successfully prepared by a simple wet route using tetraethylorthosilicate, then modified with (3-aminopropyl)triethoxisilan (APTES) as link...

The coating of gold nanorods with a silica shell (AuNR@SiO2) is an effective way to extend their use in wide variety biomedical applications including biosensing, drug delivery and photothermal therapy. A offers numerous advantages as it provides more stability, frees the surface from toxic cetyltrimethylammonium bromide (CTAB), preserves rod shape under conditions. This needs be very thin for ...

The chemicals used for the NPs synthesis are TetraEthylOrthoSilicate (TEOS), l-Arginine, chloride acid 0.1M and ethanol. They were supplied by Aldrich and used as received. High-purity deionized water (18.2 M.cm) was produced using Millipore Milli-Q Gradient system. The synthesis follows the same protocol as in our previous work [1]. It is performed in a 2000 ml reactor thermostated with hot wa...

The aim of this work was to study the adsorption behavior of the nanosilica-containing hydrogel nanocomposite of gum karaya grafted with poly(acrylic acid-acrylamide) (GK-clP(AA-co-AAM)) in the adsorption of methylene blue (MB) from aqueous solutions. The hydrogel nanocomposite was synthesized by the base-catalyzed hydrolysis and water condensation reactions of tetraethylorthosilicate in an aqu...

In this study techniques based on measurement of intrinsic tryptophan (Trp) fluorescence were used to monitor the stability and conformational flexibility of the single tryptophan protein monellin which was entrapped in sol–gel derived glass monoliths formed from tetraethylorthosilicate. The monoliths were aged either in buffer (wet-aged) or in air (dry-aged). The steady-state fluorescence spec...

SiO2-coated Cobalt Ferrite (CoFe2O4) nanoparticles were obtained by the hydrolysis of tetraethylorthosilicate in the presence of CoFe2O4 nanoparticles in co-precipitation. The effects of SiO2coating on the magnetic properties of CoFe2O4 nanoparticles were investigated. The structural, morphological and magne...