N-Doped graphene/C covalent hybrid as a new material for energy harvesting applications.
Myriam Barrejón, Luis M Arellano, Habtom B Gobeze, María J Gómez-Escalonilla, Jose Luis G Fierro, Francis D'Souza, Fernando Langa
Author Information
Myriam Barrejón: Universidad de Castilla-La Mancha , Instituto de Nanociencia , Nanotecnología y Materiales Moleculares (INAMOL) , 45071-Toledo , Spain . Email: Fernando.Langa@uclm.es. ORCID
Luis M Arellano: Universidad de Castilla-La Mancha , Instituto de Nanociencia , Nanotecnología y Materiales Moleculares (INAMOL) , 45071-Toledo , Spain . Email: Fernando.Langa@uclm.es. ORCID
Habtom B Gobeze: Department of Chemistry , University of North Texas , 1155 Union Circle, #305070 , 76203-5017 , Denton , TX , USA . Email: Francis.DSouza@UNT.edu. ORCID
María J Gómez-Escalonilla: Universidad de Castilla-La Mancha , Instituto de Nanociencia , Nanotecnología y Materiales Moleculares (INAMOL) , 45071-Toledo , Spain . Email: Fernando.Langa@uclm.es. ORCID
Jose Luis G Fierro: Instituto de Catálisis y Petroleoquímica , CSIC , Cantoblanco , 28049 , Madrid , Spain . Email: jlgfierro@icp.csic.es. ORCID
Francis D'Souza: Department of Chemistry , University of North Texas , 1155 Union Circle, #305070 , 76203-5017 , Denton , TX , USA . Email: Francis.DSouza@UNT.edu. ORCID
Fernando Langa: Universidad de Castilla-La Mancha , Instituto de Nanociencia , Nanotecnología y Materiales Moleculares (INAMOL) , 45071-Toledo , Spain . Email: Fernando.Langa@uclm.es. ORCID
N-Doped graphene (N-G) was chemically functionalized by -alkylation with the well-known electron acceptor C. The degree of functionalization and the key structural features of the N-G/C hybrid were systematically investigated by a number of techniques including thermogravimetric analysis, X-ray photoelectron and Raman spectroscopies and transmission electron and atomic force microscopies. Absorption and electrochemical studies revealed interactions between the N-G and C while the fluorescence of C within the hybrid was found to be fully quenched. Evidence for the occurrence of excited state charge transfer from the singlet excited C to N-G in the hybrid was obtained from femtosecond transient absorption studies covering the visible-near-IR regions. Electron-pooling experiments performed in the presence of a sacrificial electron donor and a second electron acceptor, methyl viologen, revealed the accumulation of the one-electron reduced product of methyl viologen upon continuous irradiation of the N-G/C nanohybrid, thus revealing the utility of this material in photocatalytic energy harvesting applications.
References
Angew Chem Int Ed Engl. 2012 Jun 25;51(26):6421-5
[PMID: 22593042]
Chem Commun (Camb). 2012 Dec 18;48(97):11859-61
[PMID: 23125975]
Chem Commun (Camb). 2010 Oct 7;46(37):7028-30
[PMID: 20730228]
Adv Mater. 2011 Feb 22;23(8):1020-4
[PMID: 21341318]
J Am Chem Soc. 2017 Mar 22;139(11):4202-4210
[PMID: 28287258]
Nano Lett. 2011 Oct 12;11(10):4047-51
[PMID: 21875083]
Nanoscale. 2016 Aug 21;8(31):14716-24
[PMID: 27305145]
Nature. 2009 Nov 19;462(7271):339-41
[PMID: 19924211]
Chem Commun (Camb). 2014 Aug 21;50(65):9053-5
[PMID: 24877158]
