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Amperometric sensing of nitrite at nanomolar concentrations by using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles

A glassy carbon electrode (GCE) was modified with a nanocomposite prepared from carboxylated multiwalled carbon nanotubes (c-MWCNT) and titanium nitride (TiN) nanoparticles to obtain a sensor for nitrite. The nanocomposite was characterized by transmission electron microscopy, elemental mapping, X-r... Full description

Journal Title: Microchimica Acta 2019, Vol.186(1), pp.1-9
Main Author: Annalakshmi, Muthaiah
Other Authors: Balasubramanian, Paramasivam , Chen, Shen-Ming , Chen, Tse-Wei
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0026-3672 ; E-ISSN: 1436-5073 ; DOI: 10.1007/s00604-018-3136-4
Link: http://dx.doi.org/10.1007/s00604-018-3136-4
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recordid: springer_jour10.1007/s00604-018-3136-4
title: Amperometric sensing of nitrite at nanomolar concentrations by using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles
format: Article
creator:
  • Annalakshmi, Muthaiah
  • Balasubramanian, Paramasivam
  • Chen, Shen-Ming
  • Chen, Tse-Wei
subjects:
  • Inorganic pollutants
  • Methemoglobinemia
  • Heterogeneous electron transfer rate
  • Low impedance
  • Electrochemical sensor
ispartof: Microchimica Acta, 2019, Vol.186(1), pp.1-9
description: A glassy carbon electrode (GCE) was modified with a nanocomposite prepared from carboxylated multiwalled carbon nanotubes (c-MWCNT) and titanium nitride (TiN) nanoparticles to obtain a sensor for nitrite. The nanocomposite was characterized by transmission electron microscopy, elemental mapping, X-ray diffraction, and Raman spectroscopy. Electrochemical studies results show the modified GCE to possess a low electrochemical resistance (Rct = 7 Ω) and a large electroactive surface (A = 0.112 cm 2 ). The heterogeneous electron transfer rate (k s ) is found to be 1.26 × 10 −2  cm s −1 . Due to the excellent synergistic effect of c-MWCNT and TiN, the GCE displays and excellent performance in terms of nitrite sensing. At a typical working voltage of +0.8 V (vs. Ag/AgCl), the limit of detection (LOD) is as low as 4 nM, and the useful analytical range extends from 6 nM to 950 μM. This is much better than the LODs of previously reported nitrite sensors. The sensor is fast (response time 4 s), selective, and long-term stable. It was applied to the determination of nitrite in spiked water and meat samples and gave good recoveries. Graphical abstract Schematic presentation of electrochemical determination of nitrite using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles modified electrode.
language: eng
source:
identifier: ISSN: 0026-3672 ; E-ISSN: 1436-5073 ; DOI: 10.1007/s00604-018-3136-4
fulltext: fulltext
issn:
  • 1436-5073
  • 14365073
  • 0026-3672
  • 00263672
url: Link


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titleAmperometric sensing of nitrite at nanomolar concentrations by using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles
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subjectInorganic pollutants ; Methemoglobinemia ; Heterogeneous electron transfer rate ; Low impedance ; Electrochemical sensor
descriptionA glassy carbon electrode (GCE) was modified with a nanocomposite prepared from carboxylated multiwalled carbon nanotubes (c-MWCNT) and titanium nitride (TiN) nanoparticles to obtain a sensor for nitrite. The nanocomposite was characterized by transmission electron microscopy, elemental mapping, X-ray diffraction, and Raman spectroscopy. Electrochemical studies results show the modified GCE to possess a low electrochemical resistance (Rct = 7 Ω) and a large electroactive surface (A = 0.112 cm 2 ). The heterogeneous electron transfer rate (k s ) is found to be 1.26 × 10 −2  cm s −1 . Due to the excellent synergistic effect of c-MWCNT and TiN, the GCE displays and excellent performance in terms of nitrite sensing. At a typical working voltage of +0.8 V (vs. Ag/AgCl), the limit of detection (LOD) is as low as 4 nM, and the useful analytical range extends from 6 nM to 950 μM. This is much better than the LODs of previously reported nitrite sensors. The sensor is fast (response time 4 s), selective, and long-term stable. It was applied to the determination of nitrite in spiked water and meat samples and gave good recoveries. Graphical abstract Schematic presentation of electrochemical determination of nitrite using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles modified electrode.
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abstractA glassy carbon electrode (GCE) was modified with a nanocomposite prepared from carboxylated multiwalled carbon nanotubes (c-MWCNT) and titanium nitride (TiN) nanoparticles to obtain a sensor for nitrite. The nanocomposite was characterized by transmission electron microscopy, elemental mapping, X-ray diffraction, and Raman spectroscopy. Electrochemical studies results show the modified GCE to possess a low electrochemical resistance (Rct = 7 Ω) and a large electroactive surface (A = 0.112 cm 2 ). The heterogeneous electron transfer rate (k s ) is found to be 1.26 × 10 −2  cm s −1 . Due to the excellent synergistic effect of c-MWCNT and TiN, the GCE displays and excellent performance in terms of nitrite sensing. At a typical working voltage of +0.8 V (vs. Ag/AgCl), the limit of detection (LOD) is as low as 4 nM, and the useful analytical range extends from 6 nM to 950 μM. This is much better than the LODs of previously reported nitrite sensors. The sensor is fast (response time 4 s), selective, and long-term stable. It was applied to the determination of nitrite in spiked water and meat samples and gave good recoveries. Graphical abstract Schematic presentation of electrochemical determination of nitrite using carboxylated multiwalled carbon nanotubes modified with titanium nitride nanoparticles modified electrode.
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