Figure 2

UV–Vis absorption spectra of 1-Aminopyrene (1-AP, blue line), highly reduced graphene oxide (HRG, black line), graphene-pyrene composite (HRG-Py, red line), and graphene-pyrene-Pd (HRG-Py-Pd, green line).
UV–Vis absorption spectra of 1-Aminopyrene (1-AP, blue line), highly reduced graphene oxide (HRG, black line), graphene-pyrene composite (HRG-Py, red line), and graphene-pyrene-Pd (HRG-Py-Pd, green line).