Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions
Kepić, Dejan (Institut de Ciència de Materials de Barcelona)
Sandoval, Stefania (Institut de Ciència de Materials de Barcelona)
Pérez del Pino, Ángel (Institut de Ciència de Materials de Barcelona)
Gyorgy, Eniko (Institut de Ciència de Materials de Barcelona)
Cabana Jiménez, Laura (Institut de Ciència de Materials de Barcelona)
Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia)
Tobias, Gerard (Institut de Ciència de Materials de Barcelona)

Date:	2017
Abstract:	N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4. 9 at. % (UV wavelength at 60 mJ cm fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner.
Grants:	Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad SEV-2015-0496 Ministerio de Economía y Competitividad MAT2014-53500-R Ministerio de Economía y Competitividad ENE2014-56109-C3-3-R
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Ammonia ; Graphene ; Lasers ; N-doping ; Reduced graphene oxide
Published in:	ChemPhysChem, Vol. 18, Issue 8 (April 2017) , p. 935-941, ISSN 1439-7641

DOI: 10.1002/cphc.201601256

Postprint 12 p, 402.9 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles