Resumo

CAMARGO-AMADO, Rubén J.  e  SEVILLA-ABARCA, Martha E.. Chemical functionalization method to obtain graphene oxide adhered to the surface of high-density pyrolytic graphite plates by acid spray coating. Ing. compet. [online]. 2021, vol.23, n.2, e21110838.  Epub 18-Maio-2021. ISSN 0123-3033.  https://doi.org/10.25100/iyc.v23i2.10838.

In recent years, graphene oxide has been the subject of study due to its electronic, magnetic, thermal, and mechanical properties. This study presents two different methods of chemical functionalization to obtain graphene oxides (GO) adhered to a high-density pyrolytic graphite (HOPG) surface by acid spray coating. For the spraying in the first method, two strong acids (H2SO4 and HNO3) were used. In the second spray method, three strong acids (H2SO4 / HNO3 / HCl) were used. For both cases, the spray interval was 2, 4 and 6 hours. The HOPG plates were characterized by SEM - EDS, FTIR, XRD and Raman spectroscopy analysis, through exhaustive analysis of these assays and verifying all variants, either by evidence of peaks in FTIR, predominant planes in the crystal lattice and observation. of bands D and G of the functional groups characteristic of GO by Raman analysis allowed to determine the presence of GO on the surface of graphite, in addition the method demonstrates the functionalization capacity of the surface of (HOPG) by the formation of a thin sheet of C atom with sp2 hybridization corresponding to band 2D and functional group C = C.

Palavras-chave : Functionalization; Graphene Oxide Pyrolytic Graphite; Spray coating.

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