The silica gel-water working pair has been commonly used for commercial adsorption chillers due to the environmental benign refrigerant and low desorption temperature (less than 85掳C). However, the application has been constrained due to the vacuum working condition and Ice point. This motivates ...
Silica gel has been fluorinated with KF, Na 2SiF 6, NH 4F and (NH 4) 2SiF 6, and the resulting reagents have been analysed by 19F and 29Si magic angle spinning NMR and infrared spectroscopy. Fluorination with NH 4F and (NH 4) 2SiF 6 results in the formation of (SiO) 3SiF ...
Demixing effects in thin-layer chromatography have been investigated with NH 2 -modified silica gel precoated plates and for frequently used hydroorganic binary solvents of various compositions with salt addition.The position of the solvent demixing front depends on: (1) solvent composition, (2) ...
Triethylammonium fluorochromate(VI), (C2H5)3NHCrO3F, TriEAFC and triethylammonium chlorochromate(VI), (C2H5)3NHCrO3Cl, TriEACC were prepared, supported on silica gel and used to quantitatively oxidize a number of organic substrates. These supported triethylammonium halochromates are versatile ...
In this study curcumin was immobilized in a silica matrix to overcome its poor aqueous solubility and rapid degradation profile. Two kinds of sol-gel powders based on colloidal silica were synthesized and characterized, one prepared with an ethanolic solution of curcumin and the other using cethyl...
Notably, DSC fabricated using the A-SiO 2 based ionic-liquid gel electrolytes achieves a power conversion efficiency (PCE) of 7.30% under 1 sun illumination (AM 1.5G, 100mWcm 2 ), which is higher than that of DSC with the ionic-liquid electrolyte employing N-methylbenzimidazole (NMBI) and...
Synthesis And Reactions Of Tripropylammonium Halochromates(VI), (C3H7)3NH[Cro3x], (X=F, Cl) On Silica Gel, Selective And Efficient Heterogeneous OxidantsTripropylammonium fluorochromate(TriPAFC) and tripropylammonium chlorochromate(TriPACC) are ...
The effect of Ph-NH-CH_2-group (Ph: phenyl) on the luminescence properties of silicca xerogel by sol-gel method has been investigated. The absorption spectra, excitation spectra and emission spectra of Ph-NH-CH_2- group embedded in the network of silica xerogel have a red shift with ...
Radiation-chemical synthesis of amino acids from a mixture of CO 2 , NH 3 , and CH 4 in the presence of silica gelIn our previous papers methods of synthesis and properties of synthetic activated carbons of spherical granulation with SCN and SCS trade marks [1–3], as well as the ...
NH3-SCRHydrothermal stabilityIn this work, we report the synthesis of crystalline Cu-SSZ-13 catalyst by using different silica sources, including colloidal silica (silica sol), gelatinous silica (silica gel) and tetraethyl orthosilicate (TEOS). These samples were characterized by various techniques ...