фотокаталіз

Photocatalytic Activity of Boron-Doped Bulk and Crystalline Graphitic Carbon Nitride in Visible Light-Driven Hydrogen Production

Boron-doped bulk samples of graphitic carbon nitride (B-g-C3N4) were synthesized by pyrolysis of melamine-boric acid mixtures, followed by their subsequent annealing in a eutectic melt of potassium and lithium chlorides, resulting in the formation of crystalline g-C3N4 (B-CGCN). The obtained materials demonstrate significantly higher activity in hydrogen evolution from aqueous-ethanolic solutions under visible light irradiation compared to undoped g-C3N4 and CGCN.

Characterization and Properties of Titanium(IV) Oxide, Synthesized by Different Routes

The article considers the influence of precursor type and sol-gel synthesis conditions of TiO2 on its properties. The obtained TiO2 samples were characterized by X-ray diffraction methods, electron microscopy, as a result of which it was found that all the obtained TiO2 powders have the crystallite size in a nanorange of 2.5–17 nm. It was shown that sorption-photocatalytic properties of TiO2 significantly depend on a phase composition, surface acidity, specific surface area and porosity.

NANOMATERIALS AND NANOTECHNOLOGY IN WATER PURIFICATION. REVIEW

The issue of drinking water is one of the most important nowadays for most countries, especially for densely populated and developing countries. The main reasons for such situation are population growth; drought; extraction of minerals, in particular oil; the widespread use of chemicals in the farm, etc., which are today that critical "pressure" on nature that prevents it from fully performing water purification from contamination.