FTIR Spectroscopy of Moringa and Ag-NPs

The freeze-dried crude aqueous extracts of Moringa and also the Ag-NPs powders were prepared in the central lab of the Nawah foundation. The samples were prepared by milling with anhydrous potassium bromide (KBr) to form very fine powders. Then, the powders were compressed into two thin pellets for analysis. The infrared spectra were recorded with a Fourier transform infrared (FTIR) spectroscopy analyzer (Model JASCO FTIR-6100) within the scanning range 4000–400 cm⁻¹. The spectra were smoothed using 3 or 5 points and the baseline of the spectra was corrected using the previously recorded spectra of the sample [60 (link)] (Figure 3 and Figure 4).