This paper presents for the first time the preparation of glass layers, suitable for the anodic bonding of two silicon substrates using a spin-on glass. In this process a liquid sol solution is used within a spin coating process. The solution is a mixture based on silica sol, organic silicon containing compounds, like TEOS (Tetraethylorthosilicate), and a sodium salt all dissolved in ethanol. A...

The chromatography of five co-administered drugs i.e. paracetamol, ibuprofen, diclofenac sodium, aspirin and ascorbic acid was performed on various reversed phase layers. The surfactant mediated solvent systems were used with various impregnated silica gel H layers for the chromatography of these five drugs. The various experimental conditions were optimized for the selection of optimum concent...

Multiwalled Carbon Nanotube (MWCNT) reinforced silica aerogel was synthesized in a very simple and cost effective sol - gel method. The process was followed by ambient pressure drying, and then the aerogel material was characterized by XRD, BET, SEM, EDX and FT-IR. 2.3 x 10-3 wt% MWCNTs were successfully incorporated in sodium silicate based silica aerogel. This metal-free nanocomposite catalyz...

In this study, silica nanoparticles were used as support to prepare a new heterogeneous catalyst system for application in organic reactions. The reaction of silica nanoparticles with sodium 2-bromoethane-1-sulfonate resulted in the connection of a sulfonic acid group on the surface of silica nanoparticles (NSESA). The synthetic catalyst system was characterized using different microscopic and ...

The purpose of the present study was to synthesize and characterize nanosilica from alkali-extraction of silica fume under controlled conditions using poly (vinyl alcohol) (PVA) as a dispersing agent. The dissolution efficiency of silica fume was affected by various factors such as concentration of the reagent, reaction time and temperature. A maximum dissolution efficiency of 91% was achieved ...

A new one-pot, efficient three-component condensation of dimedone, urazole and aromatic aldehydes in the presence of silica supported sodium hydrogen sulfate as an effective heterogeneous catalyst for the synthesis of novel Triazolo[1,2-a]indazole-1,3,8-trione derivatives under solvent-free conditions is described.