Autores: M. Belén Gómez-Mancebo, Rodolfo Fernández-Martínez, Andrea Ruiz-Perona, Verónica Rubio, Pablo Bastante, Fernando García-Pérez, Fernando Borlaf, Miguel Sánchez, Assia Hamada, Andrés Velasco, Yu Kyoung Ryu, Fernando Calle, Laura J. Bonales, Alberto J. Quejido, Javier Martínez, Isabel Rucandio.
Organismos: División de Química, Departamento de Tecnología (CIEMAT), Av. Complutense 40, 28040 Madrid, Spain. Instituto de Sistemas Optoelectrónicos y Microtecnología, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain. Departamento de Ingeniería Electrónica, E.T.S.I de Telecomunicación, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain. Unidad de Residuos de Alta Actividad, Departamento de Energía, CIEMAT, 28040 Madrid, Spain. Dpto. de Ciencia de Materiales, E.T.S.I de Caminos, Canales y Puertos, UPM, 28040 Madrid, Spain.
Citation: Nanomaterials 2023, 13, 1391. https://doi.org/10.3390/nano13081391
A way to obtain graphene-based materials on a large-scale level is by means of chemical methods for the oxidation of graphite to obtain graphene oxide (GO), in combination with thermal, laser, chemical and electrochemical reduction methods to produce reduced graphene oxide (rGO). Among these methods, thermal and laser-based reduction processes are attractive, due to their fast and low-cost characteristics. In this study, first a modified Hummer’s method was applied to obtain graphite oxide (GrO)/graphene oxide. Subsequently, an electrical furnace, a fusion instrument, a tubular reactor, a heating plate, and a microwave oven were used for the thermal reduction, and UV and CO2 lasers were used for the photothermal and/or photochemical reduction. The chemical and structural characterizations of the fabricated rGO samples were performed by Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), scanning electron microscope (SEM) and Raman spectroscopy measurements. The analysis and comparison of the results revealed that the strongest feature of the thermal reduction methods is the production of high specific surface area, fundamental for volumetric energy applications such as hydrogen storage, whereas in the case of the laser reduction methods, a highly localized reduction is achieved, ideal for microsupercapacitors in flexible electronics.
Keywords: graphene-related materials; thermal and laser methods; reduced graphene oxide (rGO); energy storage