ИСТИНА

Carbon nanotubes (CNTs) have been intensively studied because of their remarkable electronic, mechanical properties and unique one-dimensional (1D) structures. Due to their nanosize features, conductivity and thermal stability, carbon nanotubes have been considered as ideal candidates for the components in multifunctional composite materials, photocatalisis, electronic nanodevices. Up to now one of the main approaches to improve a special properties of the final materials was N-dopping of O-CNTs by other atoms. Introduction of nitrogen into the CNT structure can change electronic and chemical properties dramatically. Also such materials are applicable in industrial catalysis and electronic industry. There are some ways to prepare N-CNTs, like chemical vapor deposition (CVD) N-containing reagents, chemical modification method or impregnation by N-containing precursors with its further decomposition. Present work deals with hydrothermal technique application for this reason. In recent years, hydrothermal methods and supercritical fluids (SCF) have been widely utilized in science because of SCF has a low viscosity, high diffusivity, near zero surface tension, and strong solvent power for many of small molecules. The hydrothermal synthesis often is a one-step synthesis for composites and other materials. A fluid media, water were used. As a source of nitrogen NH3 and (NH3)2C=O we used. The condition of one-step synthesis N-CNT was changed from 140 – 400oC and 0.5 – 48 hours. N-CNT material, obtained in hydrothermal way, have been characterized by TA, XPS and SEM. It was found optimal parameters - reaction time, temperature and agent. It was shown that the 3 hour is enough to obtain a maximum N-containing in CNT and optimal temperature is close to 180 oC, and NH3 as a N-source is a little preferable than a urea.