I-98 Ivanovskii, A. L. Carbon nanostructures for alternative energy nanosystems: synthesis, properties, application [Текст] / A. L. Ivanovskii // International Scientific Journal for Alternative Energy and Ecology ISJAEE . - 2004. - № 7. - С. 28-40 : ил. - Библиогр.: с. 37-40 (90 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ГИБРИДНЫЕ НАНОМАТЕРИАЛЫ -- КАРБОН -- УГЛЕРОДНЫЕ ПИПОДЫ |
T 45 Enyashin, A. N. Electronic, Structural, and Thermal Properties of a Nanocable Consisting of Carbon and BN Nanotubes [Text] / A. N. Enyashin, G. Seifert, A. L. Ivanovskii // JETP Letters. - 2004. - Vol. 80, № 9. - P608-611 : il. - Библиогр. : с. 611 (15 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): НАНОТРУБКИ -- КАРБОН -- НИТРИД БОРА -- СВОЙСТВА ЭЛЕКТРОННЫЕ Аннотация: The band structure and thermal behavior of a coaxial C/BN nanocable (5,5)C@(17,0)BN consisting of a carbon nanotube and a boron nitride nanotube have been studied using a tight-binding approximation based on density functional theory. The system is stable up to T ~ 3500–3700 K. As the temperature increases, deformations of the BN tube begin earlier than those of the carbon tube. The near-Fermi states of the nanocable are formed by the overlapping p–p* bands of the carbon tube, and the outer BN nanotube (the nanocable sheath) is an insulator with a bandgap of ~4 eV. The electronic properties of the nanocable (the metallic-type conductivity of the C tube and the insulating character of the BN tube) are retained over the entire temperature interval \\\\Expert2\\nbo\\JETP Letters\\2004, V.80, N 9, P.608-611.pdf |
E 58 Enyashin, A. N. Deformation Mechanisms for Carbon and Boron Nitride Nanotubes / A. N. Enyashin, A. L. Ivanovskii // Inorganic Materials. - 2006. - Vol. 42, № 12. - P. 1336-1341 : il. - Bibliogr. : p. 1341 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ДЕФОРМАЦИИ -- КАРБОН -- НИТРИД БОРА -- НАНОТРУБКИ Аннотация: Molecular dynamics simulation in the density functional tight-binding approximation is used to assess the energetics and atomic mechanisms of the bending and twisting of carbon and boron nitride nanotubes Полный текст |
E 43 Electronic Structure and the Optical and Photocatalytic Properties of Anatase Doped with Vanadium and Carbon / V. M. Zainullina, V. P. Zhukov, V. N. Krasil'nikov, M. Yu. Yanchenko, L. Yu. Buldakova, E. V. Polyakov // Physics of the Solid State. - 2010. - vol. 52, № 2. - P271-280 : il. - Bibliogr. : p. 279-280 (45 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): АНАТАЗ -- ВАНАДИЙ -- КАРБОН -- ФОТОКАТАЛИТИЧЕСКИЕ СВОЙСТВА -- ЭЛЕКТРОННАЯ СТРУКТУРА Аннотация: The electronic structures of undoped anatase and anatase doped with carbon and vanadium have been calculated using the ab initio tight binding linear muffin tin orbital (TB-LMTO) method in the LSDA + U approximation. It has been shown that the doping of TiO2 leads to the formation of narrow bands of the C and V impurity states in the band gap. The calculations of the imaginary part of the dielectric function have made it possible to estimate the intensity of the optical absorption. It has been established that the doping with vanadium and carbon leads to optical absorption in the visible range and to an increase in the absorption in the ultraviolet range up to 4 eV. This should result in an increase in the photocatalytic activity on the surface of the doped anatase. The experimental determination of the photocatalytic activity of whiskers of the anatase doped with carbon and vanadium in the reaction of hydroquinone oxidation has confirmed the increase in the activity of the doped materials under exposure to ultraviolet, visible, and blue light. The phenomenon of dark catalysis in the anatase doped with carbon and vanadium has been interpreted within the concept of low-energy electronic excitations between the impurity levels of carbon Полный текст |
A 10 A Carbon–Silica Composite Material Based on Powdered Cellulose: Synthesis and Properties / A. B. Shishmakov, Yu. V. Mikushina, A. S. Seleznev, O. V. Koryakova, A. A. Valeeva, L. A. Petrov // Russian Journal of Applied Chemistry. - 2008. - Vol. 81, № 12. - P2180-2182 : il. - Bibliogr. : p. 2182 (15 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КОМПОЗИТНЫЕ МАТЕРИАЛЫ -- КАРБОН-КРЕМНИЕВЫЕ КОМПОЗИТЫ Аннотация: A procedure was developed for preparing a carbon–silica composite by thermolysis of powdered cellulose in the presence of tetraethoxysilane. The resulting composite was studied in model processes of trimethylhydroquinone oxidation and hydrogen peroxide decomposition Полный текст |