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Synthesis of fluorinated graphene oxide by using an easy one-pot deoxyfluorination reaction

AutorAguilar-Bolados, H.; Contreras-Cid, A.; Yazdani-Pedram, Mehrdad; Acosta-Villavicencio, G.; Flores, M.; Fuentealba, P.; Neira-Carrillo, A.; Verdejo, Raquel ; López-Manchado, Miguel A.
Palabras claveDeoxyfluorination reaction
Fluorinated graphene oxide
Band gap energy
Reconstruction of Csp2 structure
Fecha de publicación2018
EditorElsevier
CitaciónJournal of Colloid and Interface Science 524: 219-226 (2018)
ResumenThe fluorination of two types of graphene oxides conducted by an easy and scalable deoxyfluorination reaction is reported. This reaction was carried out using diethylaminodifluorosulfinium tetrafluoroborate, a stable compound and an efficient reagent for replacing oxygenated functional groups of graphene oxide by fluoride. The graphene oxide produced by the Hummers’ method (GOH) showed lower reactivity than that produced by the Brodie's method (GOB). X-ray photoelectron spectroscopy indicated that the highest fluorination degree achieved was 4.7 at.% when GOB was used, and the C–F character corresponds to semi-ionic bonds. Additionally, a partial reduction of GO was concomitant with the functionalization reaction. The deoxyfluorination reaction changed the crystalline structure of GO, favoring the reconstruction of Csp structure of the graphene lattice and reducing the number of stacked layers. The fluorination led to the modification of the electronic band structure of this material, increasing the band gap from 2.05 eV for GOB to 3.88 eV for fluorinated GOB, while for GOH the low flurionation led to a slight increase of the band gap, from 3.48 eV to 3.57 eV.
Versión del editorhttp://dx.doi.org/10.1016/j.jcis.2018.04.030
URIhttp://hdl.handle.net/10261/167712
Identificadoresdoi: 10.1016/j.jcis.2018.04.030
issn: 0021-9797
e-issn: 1095-7103
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