On multiwalled carbon nanotubes oxidation: Thermogravimetric, spectral and macrokinetic studies

被引：13

作者：

Zabuga, Viktor Ya. ^{[1
]}

Bochechka, Oleksandr O. ^{[2
]}

Tsapyuk, Galyna G. ^{[1
]}

Diyuk, Vitaliy E. ^{[1
]}

Panova, Anna M. ^{[2
]}

Lisnyak, Vladyslav V. ^{[1
]}

机构：

[1] Taras Shevchenko Natl Univ Kyiv, Fac Chem, 62a Volodymyrska Str, UA-01601 Kiev, Ukraine

[2] Natl Acad Sci Ukraine, VN Bakul Inst Superhard Mat, Kiev, Ukraine

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2018年 / 661卷 / 01期

关键词：

Kinetic method of analysis; multiwalled carbon nanotubes; oxidation ability; surface groups; thermal analysis; KINETICS; PURIFICATION;

D O I：

10.1080/15421406.2018.1460257

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Multiwalled carbon nanotubes (MWCNTs) were purified and then characterized by nitrogen adsorption, scanning electron microscopy, and energy dispersion X-ray microanalysis. Infrared spectroscopy, Boehm titration, and thermal analysis in air and argon were used to estimate the effect of surface chemistry on the oxidation ability of MWCNTs. From macrokinetic experiments conducted at 450-503 degrees C, the rate constants of MWCNTs oxidation and the parameters of the Arrhenius equation were determined. The oxidation intensity depends on the concentration and nature of the oxygen-containing surface groups. In fact, their thermal decomposition enhances the oxidation rate since frees the surface sites becoming additional active centers of the reaction.

引用

页码：81 / 90

页数：10

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