Artículo de revista
Synthesis of fluorinated graphene oxide by using an easy one-pot deoxyfluorination reaction
Fecha
2018-08-15Registro en:
Journal of Colloid and Interface Science Volumen: 524 Páginas: 219-226
10.1016/j.jcis.2018.04.030
Autor
Aguilar Bolados, Héctor
Contreras Cid, Ahirton
Yazdani-Pedram Zobeiri, Mehrdad
Acosta Villavicencio, Gabriela
Flores Carrasco, Marcos
Fuentealba, Pablo
Neira Carrillo, Andrónico
Verdejo, Raquel
López Manchado, Miguel
Institución
Resumen
The 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(2) 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. (C) 2018 Elsevier Inc. All rights reserved.