Porous structure of nano-dimensional boraso-graphenic powders

• Дата: 2017
• Автори: Petrova, A.V., Garbuz, V. V., Lobunets, T.F., Tomila, T.V.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут хімії поверхні ім. О.О. Чуйка НАН України 2017
• Назва видання: Поверхность
• Теми: Физико-химия поверхностных явлений
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/148542
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Porous structure of nano-dimensional boraso-graphenic powders / A.V. Petrova, V. V. Garbuz, T.F. Lobunets, T.V. Tomila // Поверхность. — 2017. — Вип. 9 (24). — С. 81-95. — Бібліогр.: 48 назв. — англ.

The structural features of surface of the nano-dimensional bor-azo-graphenic powders (t-BNg) after previous washing in boiling water were researched. The results showed that after process of purifier (washing) the powder’s surface of t-BNg characterized as slit-like micro-, mesoporous (monodispersed) structure with a narrow porous distribution in the range of 3.82 - 4.17 nm. The outer surface specific area of the powders of t-BNg according to “t - method” is 28.3 m²/g. The inner specific surface area of the mesopores is 141 m²/g (BJH method). The residues of boron oxonitride in the form of a purified sublimate, a white powder, extracted from a washed and dried sample of t-BNg at a temperature of 540 K and a pressure of ≤ 1.0 Pa. The sublimate, according to chemical analysis and infrared spectroscopy, was identified on the assumption of the cyclic dimer of di-hydro-di-hydroxo-di-bor-ox-azole of the composition of H(OH)[(BON)₂](OH)H. The model of carbamide synthesis of boron nitride, as a sequence of chemical transformations of borate-carbamide precursors in a freely radical boron-pair (> B - N <), have proposed.