Oxidation Behavior of Multiwall Carbon Nanotubes with Different Diameters and Morphology
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Applied Surface Science
ISSN: 0169-4332
|
| Вых. Данные |
Год: 2012,
Том: 258,
Номер: 17,
Страницы: 6272-6280
Страниц
: 9
DOI:
10.1016/j.apsusc.2012.03.021
|
| Ключевые слова |
Acid-base titration, Carbon nanotubes, Functionalization, Oxidation |
| Авторы |
Mazov Ilya
1
,
Kuznetsov Vladimir L.
1,3
,
Simonova Irina A.
1
,
Stadnichenko Andrey I.
1,3
,
Ishchenko Arkady V.
1
,
Romanenko Anatoly I.
2,3
,
Tkachev Evgeniy N.
2,3
,
Anikeeva Olga B.
2,3
|
| Организации |
| 1 |
Boreskov Institute of Catalysis, Lavrentieva ave. 5, Novosibirsk, 630090, Russia
|
| 2 |
Nikolaev Institute of Inorganic Chemistry, Lavrentieva ave. 3, Novosibirsk, 630090, Russia
|
| 3 |
Novosibirsk State University, Pirogova st. 2, Novosibirsk, 630090, Russia
|
|
Информация о финансировании (6)
|
1
|
Международный научно-технический центр
|
B-1708
|
|
2
|
Министерство образования и науки Российской Федерации
|
2.1.1/10256
|
|
3
|
Российский фонд фундаментальных исследований
|
09-02-00331
|
|
4
|
Российский фонд фундаментальных исследований
|
11-03-00351
|
|
5
|
Министерство образования и науки Российской Федерации
|
16.740.11.0016
|
|
6
|
Министерство образования и науки Российской Федерации
|
16.740.11.0146
|
Multiwall carbon nanotubes (MWNT) with three medium diameters (20–22, 9–13, and 6–8 nm) and different morphology were chemically oxidized using concentrated nitric acid, mixture of nitric and sulfuric acids (“mélange” solution) and mixture of sulfuric acid and hydrogen peroxide (“piranha” solution). Influence of MWNT type and structure as well as type of oxidizer on the surface composition and structure of nanotubes after oxidation was investigated. Acid–base titration, X-ray photoelectron spectroscopy and thermal gravimetric analysis were used for quantitative and qualitative investigation of surface group composition of initial and oxidized nanotubes. Amount of oxygen-containing groups on the surface of oxidized MWNT depends on the type of initial MWNT. It was found that ratio of different oxygen containing groups is less dependent on the type of oxidizer. Electrophysical properties of initial and oxidized nanotubes were investigated in temperature range 4–293 K and main types of electrical conductivity were determined. It was shown that oxidation results in decrease in electrical conductivity of all samples with simultaneous change in the conductivity mechanism. Dispersive behavior of initial and oxidized nanotubes in different commonly used solvents was investigated. It was shown that oxidation leads to the improvement of sedimentation stability of MWNT in polar solvents.