Figure 1: FTIR spectra of an aqueous extract (black curve) and Ag-NPLs (red curve). The spectra are offset for clarity

Scheme 1: Proposed mechanism of M. Oleifera-mediated synthesis of Ag-NPLs

Figure 2A: UV-vis absorption spectrum of Ag-NPLs; the SPR peak at 408 nm

Figure 2B: Excitation spectrum of the Ag-NPLs

Figure 3: XRD powder pattern of Ag-NPLs; Bragg’s reflections are observed with values of 38.11° (111), 44.29° (200), 64.44° (220), 77.39° (311), and 81.13° (222) planes of the FCC structure of Ag. Ag-NPLs are highly pure with no traces of silver oxide found on the sample surface

Figure 4A and B: Selected TEM images of Ag-NPLs; TEM images spherical- shaped confirmed that Ag-NPLs are in the nano range (5 -16nm)

Figure 4C: The corresponding electron diffraction pattern of Ag-NPLs

Figure 5A-B: Selected SEM images of Ag-NPLs

Figure 5C: EDAX profile of Ag-NPLs

Figure 6: TGA profile of Ag-NPLs

Figure 7: Arrhenius plot of electrical conductivity (σ) vs. 1/Temperature (K-1) for Ag-NPLs

Figure 8: Effect of Ag-NPLs on Caco-2, HepG2 and MCF-7 cells at different concentrations

Figure 9: UV–visible absorption spectra of degradation of sunset yellow dye in the presence of Ag-NPLs

Figure 10: Photocatalytic degradation of sunset yellow dye by Ag-NPLs. Conditions: Initial SSY concentration = 10 mg/L, Ag-NPLs catalyst dose = 0.6 g/L

Figure 11: Kinetic analysis with Ag-NPLs; initial SSY dye concentration= 10mg/L; Ag catalyst dose= 0.6 g/L

Scheme 2: Degradation mechanism of of SSY by Ag-NPLs


Chemical Structure

Molecular Formula

Color Index Number

λmax (nm)

Mw g/mol




E 110




Table 1: Chemical and physicochemical properties of sunset yellow (SSY) dye