Role of oxygen functionalities of GO in corrosion protection of metallic Fe

Heterophase-Structured Cobalt Hydroxide on Partly Reduced Graphene Oxide for Enhanced Dopamine Biosensing

“…It also proves that GO can be partly reduced to rGO with the addition of cobalt ions and 2-Hmim. The high-resolution O 1s spectrum has been investigated, the peaks (Figure A) at 531.6 (OC–OH), 532.2 (CO), 532.9 (C–O–C/absorbed H 2 O), and 533.7 eV (C–OH) of HSG, , have changed as followed (Figure C): lattice Co–O species [β-Co­(OH) 2 , 530.3 eV], hydroxyl group (530.8 eV), oxygen vacancy (O V , 531.3 eV), metal–oxygen bonding [Co–O belong to α-Co­(OH) 2 , 531.8 eV], , CO (532.3 eV), and C–O–C/absorbed H 2 O (533.1 eV) with the process of Co­(OH) 2 /PRGO formation . As for the peaks of Co 2p (Figure D), the two wide bands correspond to the Co 2p 3/2 and Co 2p 1/2 , respectively.…”

rGO‐CuOx Composites Reduced by Solid‐Phase Microwave Thermal Shock for High‐Efficient Seawater Desalination and Purification

“…The disappearance of GO inherent peak for sample GCM-3, 5, and 10 with the appearance of new peak at ≈25° and the decrease of the I D /I G ratio of GC and GCM series samples in Raman spectra (Figure S2, Supporting Information) demonstrated the reduction of GO to rGO during the solid-phase microwave reduction. [35][36][37][38] The microscopic morphology changes of nanomaterials during synthesis were characterized using scanning electron microscope. Compared with the layered structure of pure GO in Figure 1b, CuO crystals were grown in situ on the GO layers after a low-temperature hydrothermal reaction, the CuO exhibited a fusiform structure with an average length of 500 nm and a width of 150 nm (Figure 1c).…”

“…The disappearance of GO inherent peak for sample GCM‐3, 5, and 10 with the appearance of new peak at ≈25° and the decrease of the I D /I G ratio of GC and GCM series samples in Raman spectra (Figure S2, Supporting Information) demonstrated the reduction of GO to rGO during the solid‐phase microwave reduction. [ 35–38 ]…”

Theoretical and experimental investigations of enhanced uranium(vi) adsorption using a nitrogen doping strategy

“…3(a), the Raman spectra of all specimens showed two prominent peaks corresponding to the breathing modes of rings (D-band) and the E 2g phonon of sp 2 -bonded carbon atoms (G-band). The ratio of the intensity of these peaks (the I D /I G ratio) is widely used to evaluate carbon-based materials [51][52][53] and the I D /I G value of 1.35 for the GO was found to increase to 1.70, 2.01, 1.78 and 2.20 in the case of the rGO, N-rGO, PAO-rGO and PAO-N-rGO, respectively. These results demonstrate that the GO in all specimens was reduced to generate rGO.…”