Primo Arnau, AM.; Sánchez, E.; Delgado, JM.; García Gómez, H. (2014). High-yield production of N-doped graphitic platelets by aqueous exfoliation of pyrolyzed chitosan. Carbon. 68:777-783. https://doi.org/10.1016/j.carbon.2013.11.068
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/57290
Title:
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High-yield production of N-doped graphitic platelets by aqueous exfoliation of pyrolyzed chitosan
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Author:
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Primo Arnau, Ana María
Sánchez, Emilio
Delgado, José María
García Gómez, Hermenegildo
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UPV Unit:
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Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
Universitat Politècnica de València. Departamento de Química - Departament de Química
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Issued date:
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Abstract:
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[EN] Full exploitation of the properties of N-doped graphene and few-layers graphitic platelets will require a method for the mass production of this highly conductive material. Herein the preparation of few-layers graphitic ...[+]
[EN] Full exploitation of the properties of N-doped graphene and few-layers graphitic platelets will require a method for the mass production of this highly conductive material. Herein the preparation of few-layers graphitic platelet dispersions at concentrations up to 0.16 mg ml(-1) is reported. These suspensions are produced by dispersion and exfoliation of N-doped graphitic carbons obtained from the chitosan biopolymer. This high concentration derives from the morphology of pyrolyzed chitosan constituted by a graphitic carbonaceous residue with loose stacking of the graphene sheets that is prone to undergo easy exfoliation. The presence of few layers graphitic sheets was confirmed by Raman spectroscopy, transmission electron microscopy, electron diffraction and atomic force microscopy. Our method results in the formation of N-doped graphitic platelet suspensions with a yield of 40 wt.% of the initial graphitic carbon, which could potentially be improved to 90 wt.% by four consecutive sonication-centrifugation cycles of the same pyrolyzed chitosan residue. The absence of defects or oxides is confirmed by X-ray photoelectron, infrared and Raman spectroscopies. Solution processing of graphene and few-layers graphitic flakes opens up a range of potential large-area applications, from device and sensor fabrication to liquid-phase chemistry.
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Subjects:
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Graphene oxide
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Biomass wastes
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Nitrogen
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Sheets
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Films
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Copyrigths:
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Cerrado |
Source:
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Carbon. (issn:
0008-6223
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DOI:
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10.1016/j.carbon.2013.11.068
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Publisher:
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Elsevier
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Publisher version:
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http://dx.doi.org/10.1016/j.carbon.2013.11.068
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Project ID:
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info:eu-repo/grantAgreement/MINECO//CTQ2012-32315/ES/REDUCCION FOTOCATALITICA DEL DIOXIDO DE CARBONO/
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Thanks:
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Generous funding by Abengoa Solar is acknowledged. A.P. thanks the Spanish National Research Council for a research associate JAE.Doc contract. Partial financial funding by the Spanish Ministry of Economy and Competitiveness ...[+]
Generous funding by Abengoa Solar is acknowledged. A.P. thanks the Spanish National Research Council for a research associate JAE.Doc contract. Partial financial funding by the Spanish Ministry of Economy and Competitiveness (CTQ2012-32315) and Generalidad Valenciana (Prometeo 2012/013) us gratefully acknowledged.
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Type:
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Artículo
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