Structure and analysis of amorphous silicon dioxide nanoparticles
Abstract
One of the most common methods of studying as well as controlling the environment and production products is the method of chromatography. The main working element that separates components into components, in particular, is silicon dioxide powder of nano and micro sizes. At the same time powder materials are widely used and relevant for powder technologies of additive construction. The aim of the work is to study the structure and analysis of obtained nanoparticles of amorphous silicon dioxide, satisfying the characteristics for use in high-performance liquid chromatography columns, as well as in various additive technologies. Studies have shown that the method of introducing water vapor in the plasma chemical reactor of the installation for the production of amorphous silica significantly affects the presence of free hydroxyl groups. In the infrared spectrum of the product, which was caught at a distance of 2 meters the line 3750 cm-1 is absent. At a distance of 1 meter the intensity of the line as a reference with 100% value. When a small amount of NaCl was added to the briquette used in spraying, the intensity dropped by 50%. When removed 1.5 meters away, the intensity is 75%. It follows that in the hotter gas during rapid cooling more OH hydroxyl groups are formed on the surface of the aggregates, when moving away from the reactor i.e. cooling the outgoing gas OH groups are formed less.