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Beilstein J. Nanotechnol. 2026, 17, 1087–1102, doi:10.3762/bjnano.17.74
Figure 1: (a) XRD patterns, (b) nitrogen adsorption/desorption isotherms, (c) FTIR spectra, (d) Raman spectra...
Figure 2: HRTEM observation of (S,N)-GO (a) and (S,N)-rGO (b).
Figure 3: EDX mapping of (S,N)-rGO.
Figure 4: (a) Cyclic voltammograms (CVs) recorded at different electrodes (GCE, GO/GCE, (S,N)-GO/GCE, rGO/GCE...
Figure 5: (a) CVs of (S,N)-rGO/GCE in 0.1 M Britton–Robinson buffer at different pH values (2.0–8.0) containi...
Figure 6: (a) CVs of (S,N)-rGO/GCE in 0.1 M Britton–Robinson buffer (pH 4.0) containing 20 µM SDN at differen...
Figure 7: (a) Molecular structures, (b) CVs, and (c) DPVs of SDN, ciprofloxacin, and ofloxacin with concentra...
Figure 8: (a) DPV curves of (S,N)-rGO/GCE in 0.1 M Britton–Robinson buffer (pH 4.0) for different concentrati...
Figure 9: (a) Variation of peak current (Ip) for SDN at four concentrations (1.0, 2.0, 13.8, and 19.6 µM) rec...
Beilstein J. Nanotechnol. 2024, 15, 719–732, doi:10.3762/bjnano.15.60
Figure 1: Images of aqueous suspension of TiO2/GQDs samples (a) under white light and (b) under UV light. (c)...
Figure 2: (a) XRD patterns of TiO2, GQDs, and (1:4)TiO2/GQDs in suspension form. (b) XRD pattern of (1:4)TiO2...
Figure 3: HRTEM images of (a) TiO2, (b) GQDs, (c) (1:4)TiO2/GQDs, and (d) of (1:4)TiO2/GQDs with high magnifi...
Figure 4: EDX mapping of (1:4)TiO2/GQDs.
Figure 5: (a) CV curves at different electrodes in a solution (0.05 M BR buffer, pH 4) containing CURI = CHYP...
Figure 6: (a) CV curves of URI and HYP at equal concentrations of 25 µM in 0.05 M BR pH 2–6 at the (1:4)TiO2/...
Figure 7: (a) CV curves of (1:4)TiO2/GQDs-GCE in 0.05 M BR buffer (pH 3) with CURI = CHYP = 25 µM; scanning r...
Scheme 1: Proposed oxidation mechanisms of URI and HYP at the (1:4)TiO2/GQDs-GCE.
Figure 8: DPV curves at the (1:4)TiO2/GQDs-GCE. (a) 0.05 M BR pH 3 with CURI = CHYP = 1.00–15.26 µM. (b) Line...
Figure 9: The RSD of ten replicate measurements of (a) URI and (b) HYP at the (1:4)TiO2/GQDs-GCE in 0.05 M BR...
Figure 10: Effect of possible interferents. (a) Inorganic compounds and (b) organic compounds.
Beilstein J. Nanotechnol. 2024, 15, 475–489, doi:10.3762/bjnano.15.43
Figure 1: XRD patterns of (a) CF and (b) CF/GQDs.
Figure 2: (a) UV–vis absorption spectra of the GQD solution; inset: GQD solution under white light (left) and...
Figure 3: (a) FTIR spectra of CF/GQDs and CoFe2O4; (b, c) Raman spectra; (d) TG/dTG curves of CF/GQDs-200.
Figure 4: SEM images of (a) CF/GQD-140, (b) CF/GQD-180, and (c) CF/GQD-200; TEM observations and correspondin...
Figure 5: EDX-mapping of CF/GQDs-200. (a) Electron microscopy image, (b) EDX spectrum, (c) carbon mapping, (d...
Figure 6: (a) PL spectra, (b) UV–vis diffuse reflectance spectra with Tauc’s plots in the inset, (c) magnetiz...
Figure 7: (a) MB decolourisation over different catalysts (V = 100 mL, C0(MB) = 10 ppm, m = 0.05 g, time of d...
Figure 8: (a) Effects of addition of KI, IPA, KBrO3, and BQ on the visible-light-driven photocatalytic degrad...
Scheme 1: Proposed intermediates in MB degradation monitored by liquid chromatography coupled with tandem mas...
Figure 9: (a) Cyclic photocatalytic degradation experiments of MB with CF/GQDs-200 photocatalyst; (b) XRD pat...
Scheme 2: Mechanism of MB degradation over the CF/GQDs catalyst.