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Surface Structure and Adsorption Characteristics of COOH-Functionalized Multi-Wall Carbon Nanotubes

Surface Structure and Adsorption Characteristics of COOH-Functionalized Multi-Wall Carbon Nanotubes Carbon-based nanomaterials with functionalized surface are widely used in water treatment, agriculture, hydrogen storage, and biology. The current study deals with characterization of engineered multi-wall carbon nanotubes (MWCNT) prior and after chemical modification in nitric acid for 1 and 2 h. It was shown that MWCNT surface area increased from 70 m2/g (pristine material) to 149 m2/g after 2 h modification, and the surface became hydrophilic. According to back-titration method the functional surface group concentration increased almost three times after 2 h treatment compared to 1 h modification. The results of thermogravimetric analysis (TGA) have shown good correspondence with functional COOH-group concentration of samples. Total pore volume and specific surface area were calculated using non-local density functional theory (NLDFT) and Brunaeur-Emmet-Teller (BET) models. Studied functionalized MWCNTs form stable water dispersions and show great potential for biological agricultural applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png BioNanoScience Springer Journals

Surface Structure and Adsorption Characteristics of COOH-Functionalized Multi-Wall Carbon Nanotubes

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Engineering; Circuits and Systems; Biological and Medical Physics, Biophysics; Nanotechnology; Biomaterials
ISSN
2191-1630
eISSN
2191-1649
DOI
10.1007/s12668-017-0442-y
Publisher site
See Article on Publisher Site

Abstract

Carbon-based nanomaterials with functionalized surface are widely used in water treatment, agriculture, hydrogen storage, and biology. The current study deals with characterization of engineered multi-wall carbon nanotubes (MWCNT) prior and after chemical modification in nitric acid for 1 and 2 h. It was shown that MWCNT surface area increased from 70 m2/g (pristine material) to 149 m2/g after 2 h modification, and the surface became hydrophilic. According to back-titration method the functional surface group concentration increased almost three times after 2 h treatment compared to 1 h modification. The results of thermogravimetric analysis (TGA) have shown good correspondence with functional COOH-group concentration of samples. Total pore volume and specific surface area were calculated using non-local density functional theory (NLDFT) and Brunaeur-Emmet-Teller (BET) models. Studied functionalized MWCNTs form stable water dispersions and show great potential for biological agricultural applications.

Journal

BioNanoScience – Springer Journals

Published: Aug 10, 2017

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