SILVA FILHO, J.C.VENANCIO, E.C.SILVA, S.C.TAKIISHI, H.MARTINEZ, L.G.ANTUNES, R.A.2020-10-222020-10-222020SILVA FILHO, J.C.; VENANCIO, E.C.; SILVA, S.C.; TAKIISHI, H.; MARTINEZ, L.G.; ANTUNES, R.A. A thermal method for obtention of 2 to 3 reduced graphene oxide layers from graphene oxide. <b>SN Applied Sciences</b>, v. 2, n. 8, 2020. DOI: <a href="https://dx.doi.org/10.1007/s42452-020-03241-9">10.1007/s42452-020-03241-9</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31467.2523-3971http://repositorio.ipen.br/handle/123456789/31467In this work, a thermal reduction method was developed to obtain reduced graphene oxide (rGO) with 2 or 3 layers from graphene oxide (GO). The GO X-ray diffraction (XRD) patterns presented diffraction peak at 2θ = 10°, which is related to (002) reflection. After heat treatment under nitrogen ( N2(g)) atmosphere, this peak was shifted to 2θ = 25°, presenting an interlayer distance of 3.8 Å, associated to GO reduction. BET analysis of modified GO samples identified an average pore diameter of 45.38 Å and surface area of 23.06 m2/g. In the case of rGO1, rGO2 and rGO3 samples, they presented surface areas from 32.47 to 612.74 m2/g and an average pore diameter of 108.21–149.54 m2/g. Thermogravimetric analysis (TGA) indicated a higher mass loss between 150 and 230 °C. Raman spectra showed ID/IG ratios of rGO samples were higher than GO (1.36-GO; 1.45-rGO1, 1.87-rGO3) due to reducing GO and increasing sp2 clusters. XPS analysis revealed that the main carbon species in the samples were sp2- type bonds (14.99 at% for the GO and 47.85 at% for rGO3). The FTIR spectra of rGO1, rGO2 and rGO3 samples presented peaks at 3454.22 cm−1 (hydroxyl) and 1077.43 cm−1 (C–O).openAccessoxidesgraphenethermal conductivitylayersgraphitethermal gravimetric analysisraman spectraArtigo de periódico8210.1007/s42452-020-03241-90000-0001-7707-7821https://orcid.org/0000-0001-7707-7821Sem Percentil29.50