Novel Carbon Quantum Dotted Reduced Graphene Oxide Nanosheets for Nano-molar Range Cadmium Quantification

Cerium Zirconium Oxide-Decorated Reduced Graphene Oxide Nanocomposite for Low Potential Voltammetric Detection of N-Hydroxysuccinimide

“…41 The Raman spectra of rGO (Figure 1C(b)) typically exhibit two prominent bands at 1354 and 1589 cm −1 , attributed to the D and G bands, respectively, indicating the "self-healing" capabilities of rGO in restoring the hexagonal network of carbon atoms with defects. 37 In the case of CZO/rGO (Figure 1C(c)), the peaks are slightly redshifted, suggesting the anchoring of CZO on the rGO surface and corresponding zoom figure, as illustrated in Figure S1B,C. These findings imply that the defect sites on the rGO surface effectively inhibit the agglomeration of CZO.…”

“…For rGO (Figure B (curve b)), characteristic absorption bands appear at 1730, 1625, and 1040 cm –1 , corresponding to C–OH stretching, carbonyl groups of carboxylic derivatives, and epoxy C–O–C stretching vibrations of phenolic hydroxyl groups, respectively. The stretching and bending vibrations of –OH groups found in the successful reduction form of rGO can be attributed to the bands around 3395 and 1409 cm –1 . Upon close inspection of the CZO/rGO composite [Figure B (curve c)], it is observed that the addition of rGO in the CZO/rGO composite minimally affects the intensity and position of CZO peaks, despite the nearly identical spectra of the CZO/rGO composite and CZO.…”

“…Additionally, minor peaks observed at 591, 893, 1064, and 1179 cm –1 are linked to the vibrational modes of the CeO 2 lattice, providing insights into lattice dynamics and particle size effects . The Raman spectra of rGO (Figure C­(b)) typically exhibit two prominent bands at 1354 and 1589 cm –1 , attributed to the D and G bands, respectively, indicating the “self-healing” capabilities of rGO in restoring the hexagonal network of carbon atoms with defects . In the case of CZO/rGO (Figure C­(c)), the peaks are slightly red-shifted, suggesting the anchoring of CZO on the rGO surface and corresponding zoom figure, as illustrated in Figure S1B,C.…”

“…The stretching and bending vibrations of −OH groups found in the successful reduction form of rGO can be attributed to the bands around 3395 and 1409 cm −1 . 37 Upon close inspection of the CZO/rGO composite [Figure 1B (curve c)], it is observed that the addition of rGO in the CZO/ rGO composite minimally affects the intensity and position of CZO peaks, despite the nearly identical spectra of the CZO/ rGO composite and CZO. The absence of IR absorption bands for rGO in the CZO/rGO composite demonstrates that CZO is embedded in the rGO sheet, 38 consistent with the XRD measurements.…”