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Non-enzymatic sensing of hydrogen peroxide using a glassy carbon electrode modified with a composite consisting of chitosan‐encapsulated graphite and platinum nanoparticles

We report on a non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor which makes use of a nanocomposite consisting of platinum nanoparticles (PtNPs) and chitosan-encapsulated graphite (graphite-CS). The composite was prepared by sonication of pristine graphite in chitosan (CS) in 5 % acetic acid. The Pt... Full description

Journal Title: Microchimica Acta 2016, Vol.183(11), pp.2861-2869
Main Author: Chen, Tse-Wei
Other Authors: Palanisamy, Selvakumar , Chen, Shen-Ming
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0026-3672 ; E-ISSN: 1436-5073 ; DOI: 10.1007/s00604-016-1925-1
Link: http://dx.doi.org/10.1007/s00604-016-1925-1
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recordid: springer_jour10.1007/s00604-016-1925-1
title: Non-enzymatic sensing of hydrogen peroxide using a glassy carbon electrode modified with a composite consisting of chitosan‐encapsulated graphite and platinum nanoparticles
format: Article
creator:
  • Chen, Tse-Wei
  • Palanisamy, Selvakumar
  • Chen, Shen-Ming
subjects:
  • Graphite
  • Chitosan
  • Platinum nanoparticles
  • Nanocomposite
  • Hydrogen peroxide
  • Non-enzymatic sensor
ispartof: Microchimica Acta, 2016, Vol.183(11), pp.2861-2869
description: We report on a non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor which makes use of a nanocomposite consisting of platinum nanoparticles (PtNPs) and chitosan-encapsulated graphite (graphite-CS). The composite was prepared by sonication of pristine graphite in chitosan (CS) in 5 % acetic acid. The PtNP decorated graphite-CS (graphite-CS/PtNPs) composite was prepared by electrodeposition of PtNPs on the graphite-CS modified glassy carbon electrode. The graphite-CS/PtNP composite was characterized by scanning electron microscopy, elemental analysis and FTIR spectroscopy. The modified electrode displays an enhanced reduction peak current for H 2 O 2 when compared with electrodes modified with graphite/PtNPs and PtNPs. The modified electrode exhibits excellent electrocatalytic activity towards the reduction of H 2 O 2 , and the amperometric response is linear over the concentration range from 0.25 to 2890 μM. The sensitivity and the detection limit are 0.465 μA⋅μM‾ 1 ⋅ cm‾ 2 and 66 nM, respectively. The sensor shows fast response (3 s) in detecting H 2 O 2 . It is also highly selective in the presence of potentially interfering compounds, and may therefore be used as a feasible platform for sensing H 2 O 2 in real samples. Graphical abstract Preparation of graphite-CS/PtNP composite, and its application to electrochemical reduction of H 2 O 2 .
language: eng
source:
identifier: ISSN: 0026-3672 ; E-ISSN: 1436-5073 ; DOI: 10.1007/s00604-016-1925-1
fulltext: fulltext
issn:
  • 1436-5073
  • 14365073
  • 0026-3672
  • 00263672
url: Link


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titleNon-enzymatic sensing of hydrogen peroxide using a glassy carbon electrode modified with a composite consisting of chitosan‐encapsulated graphite and platinum nanoparticles
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subjectGraphite ; Chitosan ; Platinum nanoparticles ; Nanocomposite ; Hydrogen peroxide ; Non-enzymatic sensor
descriptionWe report on a non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor which makes use of a nanocomposite consisting of platinum nanoparticles (PtNPs) and chitosan-encapsulated graphite (graphite-CS). The composite was prepared by sonication of pristine graphite in chitosan (CS) in 5 % acetic acid. The PtNP decorated graphite-CS (graphite-CS/PtNPs) composite was prepared by electrodeposition of PtNPs on the graphite-CS modified glassy carbon electrode. The graphite-CS/PtNP composite was characterized by scanning electron microscopy, elemental analysis and FTIR spectroscopy. The modified electrode displays an enhanced reduction peak current for H 2 O 2 when compared with electrodes modified with graphite/PtNPs and PtNPs. The modified electrode exhibits excellent electrocatalytic activity towards the reduction of H 2 O 2 , and the amperometric response is linear over the concentration range from 0.25 to 2890 μM. The sensitivity and the detection limit are 0.465 μA⋅μM‾ 1 ⋅ cm‾ 2 and 66 nM, respectively. The sensor shows fast response (3 s) in detecting H 2 O 2 . It is also highly selective in the presence of potentially interfering compounds, and may therefore be used as a feasible platform for sensing H 2 O 2 in real samples. Graphical abstract Preparation of graphite-CS/PtNP composite, and its application to electrochemical reduction of H 2 O 2 .
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abstractWe report on a non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor which makes use of a nanocomposite consisting of platinum nanoparticles (PtNPs) and chitosan-encapsulated graphite (graphite-CS). The composite was prepared by sonication of pristine graphite in chitosan (CS) in 5 % acetic acid. The PtNP decorated graphite-CS (graphite-CS/PtNPs) composite was prepared by electrodeposition of PtNPs on the graphite-CS modified glassy carbon electrode. The graphite-CS/PtNP composite was characterized by scanning electron microscopy, elemental analysis and FTIR spectroscopy. The modified electrode displays an enhanced reduction peak current for H 2 O 2 when compared with electrodes modified with graphite/PtNPs and PtNPs. The modified electrode exhibits excellent electrocatalytic activity towards the reduction of H 2 O 2 , and the amperometric response is linear over the concentration range from 0.25 to 2890 μM. The sensitivity and the detection limit are 0.465 μA⋅μM‾ 1 ⋅ cm‾ 2 and 66 nM, respectively. The sensor shows fast response (3 s) in detecting H 2 O 2 . It is also highly selective in the presence of potentially interfering compounds, and may therefore be used as a feasible platform for sensing H 2 O 2 in real samples. Graphical abstract Preparation of graphite-CS/PtNP composite, and its application to electrochemical reduction of H 2 O 2 .
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doi10.1007/s00604-016-1925-1
pages2861-2869
date2016-11