Redox-active nickel in carbon nanotubes and its direct determination

The presence of residual metal-catalyst impurities in carbon nanotubes is responsible for their toxicity. It is important to differentiate between the total amount of impurities and the redox-active (bioavailable) amount of such impurities because only the bioavailable impurities exhibit toxic effec...

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Main Authors: Ambrosi, Adriano, Pumera, Martin
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/99147
http://hdl.handle.net/10220/12937
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-991472020-03-07T12:34:49Z Redox-active nickel in carbon nanotubes and its direct determination Ambrosi, Adriano Pumera, Martin School of Physical and Mathematical Sciences The presence of residual metal-catalyst impurities in carbon nanotubes is responsible for their toxicity. It is important to differentiate between the total amount of impurities and the redox-active (bioavailable) amount of such impurities because only the bioavailable impurities exhibit toxic effects. Herein, we report a simple and specific method for quantifying the amount of redox-active Ni present in various commercial samples of CNTs. It is based on the electrochemical oxidation of Ni(OH)2 that is formed in alkaline solutions when Ni impurities are opened to the surrounding environment. Metallic Ni impurities play an extremely active role in toxicological assays as well as in undesired catalytic processes, and thus a method to rapidly quantify the amount of redox-active Ni is of great importance. 2013-08-02T07:00:37Z 2019-12-06T20:03:53Z 2013-08-02T07:00:37Z 2019-12-06T20:03:53Z 2012 2012 Journal Article Ambrosi, A.,& Pumera, M. (2012). Redox-Active Nickel in Carbon Nanotubes and Its Direct Determination. Chemistry - A European Journal, 18(11), 3338-3344. 0947-6539 https://hdl.handle.net/10356/99147 http://hdl.handle.net/10220/12937 10.1002/chem.201103266 en Chemistry - a European journal
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description The presence of residual metal-catalyst impurities in carbon nanotubes is responsible for their toxicity. It is important to differentiate between the total amount of impurities and the redox-active (bioavailable) amount of such impurities because only the bioavailable impurities exhibit toxic effects. Herein, we report a simple and specific method for quantifying the amount of redox-active Ni present in various commercial samples of CNTs. It is based on the electrochemical oxidation of Ni(OH)2 that is formed in alkaline solutions when Ni impurities are opened to the surrounding environment. Metallic Ni impurities play an extremely active role in toxicological assays as well as in undesired catalytic processes, and thus a method to rapidly quantify the amount of redox-active Ni is of great importance.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Ambrosi, Adriano
Pumera, Martin
format Article
author Ambrosi, Adriano
Pumera, Martin
spellingShingle Ambrosi, Adriano
Pumera, Martin
Redox-active nickel in carbon nanotubes and its direct determination
author_sort Ambrosi, Adriano
title Redox-active nickel in carbon nanotubes and its direct determination
title_short Redox-active nickel in carbon nanotubes and its direct determination
title_full Redox-active nickel in carbon nanotubes and its direct determination
title_fullStr Redox-active nickel in carbon nanotubes and its direct determination
title_full_unstemmed Redox-active nickel in carbon nanotubes and its direct determination
title_sort redox-active nickel in carbon nanotubes and its direct determination
publishDate 2013
url https://hdl.handle.net/10356/99147
http://hdl.handle.net/10220/12937
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