“…41 The carbon spectrum depicted the carbon-based functional groups of C–C/CC, C–N, CO, and OC–OH at 284.07, 285.88, 288.20, and 290.68 eV. 42,43 The spectrum of sulfur showed the relative peaks to S–Cd at 161.56 and 162.89 eV, while the peak of S–C appeared at 165.90 eV. 44 The characteristic peaks for N–H and NH 2 appeared in the nitrogen spectrum at 399.14 and 400.18 eV, respectively.…”