Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity

Eutectic mixtures (EMs) were used for functionalization of carbon nanotubes (CNTs). The process consists of two main steps: a pretreatment with an acidic KMnO4 solution followed by an ultrasound treatment of CNT with the EM as a new class of environmentally-friendly solvents. Various ammonium and ph...

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Main Authors:	Abo-Hamad, Ali, Hayyan, Maan, AlSaadi, Mohammed AbdulHakim, Mirghani, Mohamed Elwathig Saeed, Hashim, Mohd Ali
Format:	Article
Language:	English English English
Published:	Elsevier 2017
Subjects:	Q Science (General) QD Chemistry
Online Access:	http://irep.iium.edu.my/55167/ http://irep.iium.edu.my/55167/ http://irep.iium.edu.my/55167/ http://irep.iium.edu.my/55167/19/55167_Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures.pdf http://irep.iium.edu.my/55167/8/55167-Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures_WOS.pdf http://irep.iium.edu.my/55167/20/55167_Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures_SCOPUS.pdf

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spelling	iium-551672018-04-27T08:23:22Z http://irep.iium.edu.my/55167/ Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity Abo-Hamad, Ali Hayyan, Maan AlSaadi, Mohammed AbdulHakim Mirghani, Mohamed Elwathig Saeed Hashim, Mohd Ali Q Science (General) QD Chemistry Eutectic mixtures (EMs) were used for functionalization of carbon nanotubes (CNTs). The process consists of two main steps: a pretreatment with an acidic KMnO4 solution followed by an ultrasound treatment of CNT with the EM as a new class of environmentally-friendly solvents. Various ammonium and phosphonium based-EMs were used in the process and changes were recorded with respect to the functional groups on the CNT surface. Raman spectroscopy and X-ray diffraction analysis conﬁrmed successful cova- lent functionalization without substantial damage to the structure. Accurate characterization of CNT dispersions was also carried out using UV–Vis spectroscopy and zeta potential. Studying the dispersion behavior of CNTs in aqueous solutions showed that modiﬁed CNTs presented different dispersibility due to the changes in hydrophilicity after functionalization. The suspension stability of all modiﬁed- CNTs improved considerably compared to pristine CNT. Textural and structural characterization suggested an increase in surface area after functionalization due to exfoliation, open-ended tubes, and elimination of catalyst particles. EM-functionalized-CNTs were found applicable in electrochemical sensing. The electrochemical performance for one of the functionalized-CNTs was studied on the surface of a glassy carbon (GC) electrode for the detection of nitrite. Improved catalytic activity and sensitivity were obtained compared to bare and pristine CNT-modiﬁed GC electrodes with a detection limit of 1.35 lM. Elsevier 2017-03-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/55167/19/55167_Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures.pdf application/pdf en http://irep.iium.edu.my/55167/8/55167-Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures_WOS.pdf application/pdf en http://irep.iium.edu.my/55167/20/55167_Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures_SCOPUS.pdf Abo-Hamad, Ali and Hayyan, Maan and AlSaadi, Mohammed AbdulHakim and Mirghani, Mohamed Elwathig Saeed and Hashim, Mohd Ali (2017) Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity. Chemical Engineering Journal, 311 (1). pp. 326-339. E-ISSN 1385-8947 http://www.sciencedirect.com/science/article/pii/S1385894716316709 10.1016/j.cej.2016.11.108
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	Q Science (General) QD Chemistry
spellingShingle	Q Science (General) QD Chemistry Abo-Hamad, Ali Hayyan, Maan AlSaadi, Mohammed AbdulHakim Mirghani, Mohamed Elwathig Saeed Hashim, Mohd Ali Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
description	Eutectic mixtures (EMs) were used for functionalization of carbon nanotubes (CNTs). The process consists of two main steps: a pretreatment with an acidic KMnO4 solution followed by an ultrasound treatment of CNT with the EM as a new class of environmentally-friendly solvents. Various ammonium and phosphonium based-EMs were used in the process and changes were recorded with respect to the functional groups on the CNT surface. Raman spectroscopy and X-ray diffraction analysis conﬁrmed successful cova- lent functionalization without substantial damage to the structure. Accurate characterization of CNT dispersions was also carried out using UV–Vis spectroscopy and zeta potential. Studying the dispersion behavior of CNTs in aqueous solutions showed that modiﬁed CNTs presented different dispersibility due to the changes in hydrophilicity after functionalization. The suspension stability of all modiﬁed- CNTs improved considerably compared to pristine CNT. Textural and structural characterization suggested an increase in surface area after functionalization due to exfoliation, open-ended tubes, and elimination of catalyst particles. EM-functionalized-CNTs were found applicable in electrochemical sensing. The electrochemical performance for one of the functionalized-CNTs was studied on the surface of a glassy carbon (GC) electrode for the detection of nitrite. Improved catalytic activity and sensitivity were obtained compared to bare and pristine CNT-modiﬁed GC electrodes with a detection limit of 1.35 lM.
format	Article
author	Abo-Hamad, Ali Hayyan, Maan AlSaadi, Mohammed AbdulHakim Mirghani, Mohamed Elwathig Saeed Hashim, Mohd Ali
author_facet	Abo-Hamad, Ali Hayyan, Maan AlSaadi, Mohammed AbdulHakim Mirghani, Mohamed Elwathig Saeed Hashim, Mohd Ali
author_sort	Abo-Hamad, Ali
title	Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
title_short	Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
title_full	Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
title_fullStr	Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
title_full_unstemmed	Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
title_sort	functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity
publisher	Elsevier
publishDate	2017
url	http://irep.iium.edu.my/55167/ http://irep.iium.edu.my/55167/ http://irep.iium.edu.my/55167/ http://irep.iium.edu.my/55167/19/55167_Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures.pdf http://irep.iium.edu.my/55167/8/55167-Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures_WOS.pdf http://irep.iium.edu.my/55167/20/55167_Functionalization%20of%20carbon%20nanotubes%20using%20eutectic%20mixtures_SCOPUS.pdf
first_indexed	2023-09-18T21:17:59Z
last_indexed	2023-09-18T21:17:59Z
_version_	1777411691188846592

Functionalization of carbon nanotubes using eutectic mixtures: a promising route for enhanced aqueous dispersibility and electrochemical activity

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