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Core/shell microcapsules consisting of Fe3O4 microparticles coated with nitrogen-doped mesoporous carbon for voltammetric sensing of hydrogen peroxide

The authors describe the preparation of core/shell composites consisting of Fe 3 O 4 microparticles coated with nitrogen-doped mesoporous carbon. Synthesis was accomplished by simultaneous reduction of template α-Fe 2 O 3 and pyrolysis of a nitrogen-containing poly(ionic liquids). The mesoporous com... Full description

Journal Title: Mikrochimica acta (1966) 2017-09-07, Vol.184 (11), p.4513-4520
Main Author: Qin, Zuojia
Other Authors: Zhao, Yu , Lin, Li , Zou, Ping , Zhang, Li , Chen, Hui , Wang, Ying , Wang, Guangtu , Zhang, Yunsong
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Vienna: Springer Vienna
ID: ISSN: 0026-3672
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recordid: cdi_crossref_primary_10_1007_s00604_017_2497_4
title: Core/shell microcapsules consisting of Fe3O4 microparticles coated with nitrogen-doped mesoporous carbon for voltammetric sensing of hydrogen peroxide
format: Article
creator:
  • Qin, Zuojia
  • Zhao, Yu
  • Lin, Li
  • Zou, Ping
  • Zhang, Li
  • Chen, Hui
  • Wang, Ying
  • Wang, Guangtu
  • Zhang, Yunsong
subjects:
  • Analytical Chemistry
  • Characterization and Evaluation of Materials
  • Chemistry
  • Chemistry and Materials Science
  • Microengineering
  • Nanochemistry
  • Nanotechnology
  • Original Paper
ispartof: Mikrochimica acta (1966), 2017-09-07, Vol.184 (11), p.4513-4520
description: The authors describe the preparation of core/shell composites consisting of Fe 3 O 4 microparticles coated with nitrogen-doped mesoporous carbon. Synthesis was accomplished by simultaneous reduction of template α-Fe 2 O 3 and pyrolysis of a nitrogen-containing poly(ionic liquids). The mesoporous composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffractometry and adsorption/desorption isotherms. The characterizations prove successful formation of an Fe 3 O 4 core and an outer shell (coating) consisting of nitrogen-doped mesoporous carbon. The material was placed on a glassy carbon electrode and synergistic catalytic effect of of N-doping, the mesoporous, core/shell structure and two types of active sites properties between Fe 3 O 4 core and nitrogen-doped mesoporous carbon shell is shown to result in superior electrochemical activity towards the reduction of hydrogen peroxide. Figures of merit include (a) a sensitivity of 77.1 μA mM −1  cm −2 ; (b) a linear response over the 50 μM to 33 mM H 2 O 2 concentration range, (c) a 5.9 μM detection limit of (at an S/N ratio of 3), and (d) a low working voltage of −0.4 V (vs. saturated calomel electrode) which makes the method more selective. Graphical abstract Electrochemical method for H 2 O 2 detection based on Fe 3 O 4 @nitrogen-doped mesoporous carbon microcapsules core/shell composites (Fe 3 O 4 @NMCMs), prepared by the polymerization of the ionic liquids (1-Allyl-3-ethylimidazolium tetrafluoroborate, [AEIm]BF 4 ) monomer (PILs) on the surface of α-Fe 2 O 3 nano-peanuts and then pyrolysis.
language: eng
source:
identifier: ISSN: 0026-3672
fulltext: no_fulltext
issn:
  • 0026-3672
  • 1436-5073
url: Link


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titleCore/shell microcapsules consisting of Fe3O4 microparticles coated with nitrogen-doped mesoporous carbon for voltammetric sensing of hydrogen peroxide
creatorQin, Zuojia ; Zhao, Yu ; Lin, Li ; Zou, Ping ; Zhang, Li ; Chen, Hui ; Wang, Ying ; Wang, Guangtu ; Zhang, Yunsong
creatorcontribQin, Zuojia ; Zhao, Yu ; Lin, Li ; Zou, Ping ; Zhang, Li ; Chen, Hui ; Wang, Ying ; Wang, Guangtu ; Zhang, Yunsong
descriptionThe authors describe the preparation of core/shell composites consisting of Fe 3 O 4 microparticles coated with nitrogen-doped mesoporous carbon. Synthesis was accomplished by simultaneous reduction of template α-Fe 2 O 3 and pyrolysis of a nitrogen-containing poly(ionic liquids). The mesoporous composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffractometry and adsorption/desorption isotherms. The characterizations prove successful formation of an Fe 3 O 4 core and an outer shell (coating) consisting of nitrogen-doped mesoporous carbon. The material was placed on a glassy carbon electrode and synergistic catalytic effect of of N-doping, the mesoporous, core/shell structure and two types of active sites properties between Fe 3 O 4 core and nitrogen-doped mesoporous carbon shell is shown to result in superior electrochemical activity towards the reduction of hydrogen peroxide. Figures of merit include (a) a sensitivity of 77.1 μA mM −1  cm −2 ; (b) a linear response over the 50 μM to 33 mM H 2 O 2 concentration range, (c) a 5.9 μM detection limit of (at an S/N ratio of 3), and (d) a low working voltage of −0.4 V (vs. saturated calomel electrode) which makes the method more selective. Graphical abstract Electrochemical method for H 2 O 2 detection based on Fe 3 O 4 @nitrogen-doped mesoporous carbon microcapsules core/shell composites (Fe 3 O 4 @NMCMs), prepared by the polymerization of the ionic liquids (1-Allyl-3-ethylimidazolium tetrafluoroborate, [AEIm]BF 4 ) monomer (PILs) on the surface of α-Fe 2 O 3 nano-peanuts and then pyrolysis.
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atitleCore/shell microcapsules consisting of Fe3O4 microparticles coated with nitrogen-doped mesoporous carbon for voltammetric sensing of hydrogen peroxide
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date2017-09-07
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abstractThe authors describe the preparation of core/shell composites consisting of Fe 3 O 4 microparticles coated with nitrogen-doped mesoporous carbon. Synthesis was accomplished by simultaneous reduction of template α-Fe 2 O 3 and pyrolysis of a nitrogen-containing poly(ionic liquids). The mesoporous composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffractometry and adsorption/desorption isotherms. The characterizations prove successful formation of an Fe 3 O 4 core and an outer shell (coating) consisting of nitrogen-doped mesoporous carbon. The material was placed on a glassy carbon electrode and synergistic catalytic effect of of N-doping, the mesoporous, core/shell structure and two types of active sites properties between Fe 3 O 4 core and nitrogen-doped mesoporous carbon shell is shown to result in superior electrochemical activity towards the reduction of hydrogen peroxide. Figures of merit include (a) a sensitivity of 77.1 μA mM −1  cm −2 ; (b) a linear response over the 50 μM to 33 mM H 2 O 2 concentration range, (c) a 5.9 μM detection limit of (at an S/N ratio of 3), and (d) a low working voltage of −0.4 V (vs. saturated calomel electrode) which makes the method more selective. Graphical abstract Electrochemical method for H 2 O 2 detection based on Fe 3 O 4 @nitrogen-doped mesoporous carbon microcapsules core/shell composites (Fe 3 O 4 @NMCMs), prepared by the polymerization of the ionic liquids (1-Allyl-3-ethylimidazolium tetrafluoroborate, [AEIm]BF 4 ) monomer (PILs) on the surface of α-Fe 2 O 3 nano-peanuts and then pyrolysis.
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doi10.1007/s00604-017-2497-4