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In situ Immobilization of Copper Nanoparticles on Polydopamine Coated Graphene Oxide for H2O2 Determination

PloS one, 2016-07, Vol.11 (7), p.e0157926-e0157926 [Peer Reviewed Journal]

2016 Liu et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2016 Liu et al 2016 Liu et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0157926 ;PMID: 27380524

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Title:
In situ Immobilization of Copper Nanoparticles on Polydopamine Coated Graphene Oxide for H2O2 Determination
Author: Liu, Yingzhu ; Han, Yanwei ; Chen, Rongsheng ; Zhang, Haijun ; Liu, Simin ; Liang, Feng
Lebedev, Nikolai
Subjects: Acids ; Adhesive bonding ; Amino groups ; Analytical chemistry ; Ascorbic acid ; Ascorbic Acid - chemistry ; Biosensing Techniques - instrumentation ; Biosensing Techniques - methods ; Bonding strength ; Carbon ; Catechol ; Cell adhesion & migration ; Chemical engineering ; Chemical sensors ; Coated electrodes ; Copper ; Copper - chemistry ; Copper compounds ; Dopamine ; Electrochemical Techniques - instrumentation ; Electrochemical Techniques - methods ; Electrochemistry ; Electrodes ; Engineering and Technology ; Fabrication ; Glassy carbon ; Graphene ; Graphite - chemistry ; Hydrogen peroxide ; Hydrogen Peroxide - analysis ; Hydrogen Peroxide - chemistry ; Immobilization ; Indoles - chemistry ; Laboratories ; Metabolism ; Metal Nanoparticles - chemistry ; Metallurgy ; Nanoparticles ; Oxides - chemistry ; Physical Sciences ; Polymers - chemistry ; Protective coatings ; Quantum dots ; Reproducibility of Results ; Research and Analysis Methods ; Response time ; Science ; Sensitivity ; Sensors ; Signal to noise ratio ; Silver chloride ; Silver chlorides ; Uric acid ; Uric Acid - chemistry
Is Part Of: PloS one, 2016-07, Vol.11 (7), p.e0157926-e0157926
Description: Nanostructured electrochemical sensors often suffer from irreversible aggregation and poor adhesion to the supporting materials, resulting in reduced sensitivity and selectivity over time. We describe a versatile method for fabrication of a H2O2 sensor by immobilizing copper nanoparticles (Cu NPs; 20 nm) on graphene oxide (GO) sheets via in-situ reduction of copper(II) on a polydopamine (PDA) coating on a glassy carbon electrode. The PDA film with its amino groups and catechol groups acts as both a reductant and an adhesive that warrants tight bonding between the Cu NPs and the support. The modified electrode, best operated at a working voltage of -0.4 V (vs. Ag/AgCl), has a linear response to H2O2 in the 5 μM to 12 mM concentration range, a sensitivity of 141.54 μA∙mM‾1∙cm‾2, a response time of 4 s, and a 1.4 μM detection limit (at an S/N ratio of 3). The sensor is highly reproducible and selective (with minimal interference to ascorbic acid and uric acid). The method was applied to the determination of H2O2 in sterilant by the standard addition method and gave recoveries between 97% and 99%.
Publisher: United States: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0157926
PMID: 27380524
Source: GFMER Free Medical Journals
MEDLINE
PubMed Central
Public Library of Science (PLoS)
ProQuest Central
DOAJ Directory of Open Access Journals

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In situ Immobilization of Copper Nanoparticles on Polydopamine Coated Graphene Oxide for H2O2 Determination

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