The effects of liquid-phase oxidation of multiwall carbon nanotubes on their surface characteristics

2nd International Symposium on Fundamental Aspects of Rare-earth Elements Mining and Separation and Modern Materials Engineering

材料科学;物理学

Burmistrov, I.N.^1 ; Muratov, D.S.^1 ; Ilinykh, I.A.^1 ; Kolesnikov, E.A.^1 ; Godymchuk Yu, A.^1,2 ; Kuznetsov, D.V.^1

National University of Science and Technology MISiS, Leninsky Prospekt 4, Moscow

119049, Russia^1

National Research Tomsk Polytechnic University, Lenina Ave. 30, Tomsk

634050, Russia^2

关键词: Concentrated nitric acid;    High temperature;    Liquid-phase oxidation;    Low-temperature nitrogen;    Nanostructured carbon materials;    Structural characteristics;    Surface characteristics;    Surface modification process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/112/1/012004/pdf
DOI  :  10.1088/1757-899X/112/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The development of new sorbents based on nanostructured carbon materials recently became a perspective field of research. Main topic of current study is to investigate the effect of different regimes of multiwall carbon nanotubes (MWCNT) surface modification process on their structural characteristics. MWCNT samples were treated with nitric acid at high temperature. Structural properties were studied using low temperature nitrogen adsorption and acid-base back titration methods. The study showed that diluted nitric acid does not affect MWCNT structure. Concentrated nitric acid treatment leads to formation of 2.8 carboxylic groups per 1 nm2of the sample surface.