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Herein, two porphyrins with bismuth metal incorporated in the porphyrinic core were synthesized having peripheral carboxyl and hydroxyl functional groups. The successful synthesis of free base porphyrin and their bismuth-integrated metalloporphyrins was identified using ¹H NMR spectroscopy, UV-visible and Fourier transform infrared (FT-IR). Further, these bismuth porphyrins complexes were doped with thermally reduced graphene oxide (TRGO) via simple solvothermal techniques. The intrinsic characteristics of prepared metalloporphyrins-based reduced graphene oxide nanocomposites were examined by using various spectroscopic techniques like, photo-physical properties (UV-Visible spectroscopy and Fluorescence spectroscopy), Fourier transform infrared (FT-IR), powdered X-ray diffraction (P-XRD) patterns, FE-SEM and EDX analysis. At last, the photocatalytic properties of nanocomposites were demonstrated by photocatalytic degradation of industrial pollutant rhodamine B (Rh-b) on irradiation of visible light. The catalytic efficiency of RGO-Bi-P1 and RGO-Bi-P2 came out to be 94.58% and 93.26%, respectively.