It has a great potential for several applications due to its Young’s modulus of 1 TPa, intrinsic strength of 130 GPa, room temperature (RT) electron mobility of 250,000 cm 2 V −1 s −1, and optical transmittance of 97.7%. Graphene, a 2D monolayer of sp 2-hybridized carbon atoms arranged in a hexagonal lattice with a carbon–carbon bond length of 0.142 nm, has been extensively studied since it was first isolated in 2004 by Novoselov et al. Finally, the electrical powder conductivity decreased after reduction with PDA, increasing again after its removal. Moreover, a significant change in the thermal stability was not observed with the chemical treatments. It was also concluded that Raman spectroscopy is not well suited to determine if the reduction and restoration of the sp 2 structure occurred. The results show that the complete reduction of the OH groups in GO occurred after 180 min of reaction. The PDA layer was removed to prepare reduced graphene oxide (RGO) and the effect of all chemical treatments on the thermal and electrical properties of the materials was studied. For this purpose, GO and PDA-GO with different times of reduction were prepared and characterized by Raman Spectroscopy and XPS. In this approach, the number of carbon atoms bonded to OH and to nitrogen in PDA is considered and compared to the total intensity of the signal resulting from OH groups in polydopamine-reduced graphene oxide (PDA-GO) to show the reduction. A new approach using X-ray photoelectron spectroscopy (XPS) was employed to give insight into the reduction of graphene oxide (GO) using a green approach with polydopamine (PDA).

Xps peak shift reduced graphene oxide