<p>A novel reduced graphene oxide-supported silver tungstate (rGO/Ag₂WO₄) nanocomposite was successfully developed via a green synthesis method utilizing <i>Phyllanthus amarus</i> leaf extract. The synthesized materials were characterized using XRD, HR-TEM, and FE-SEM with EDX, UV-DRS, XPS, BET, and IR techniques. From XRD, crystalline sizes were calculated and found to be 42, 47, and 36&#xa0;nm for WO₃, Ag₂WO₄, and rGO/Ag₂WO₄, respectively. TEM analysis also confirmed the presence of rGO nanosheets with appropriately distributed Ag₂WO₄ nanoparticles; increased particle size is observed in Ag₂WO₄ and comparatively also in rGO/Ag₂WO₄ composites with some distribution irregularities. FE-SEM images supported the result to show rGO possesses a wrinkled and folded morphology, WO₃ demonstrated a porous and granular morphology, Ag₂WO₄ exhibited a mixed geometry of spherical and rod geometry morphology, while the rGO/Ag₂WO₄ nanocomposite structures consist associatively with rGO layers, and Ag₂WO₄ particles are interspersed through rGO matrix. Band gap energies calculated using Tauc’s plot were 2.57, 2.61, and 2.67&#xa0;eV for WO₃, Ag₂WO₄, and rGO/Ag₂WO₄. XPS results confirmed the presence of W⁴⁺, Ag⁺, O^2-, and C which is consistent with the formation of rGO/Ag₂WO₄ nanocomposite. The rGO/Ag₂WO₄ composite exhibited a significantly increased surface area and porosity compared to the individual components, as determined by BET analysis. FT-IR analysis also showed the presence of characteristic peaks consistent with W–O, Ag–O, and rGO corresponding vibrations. The rGO/Ag₂WO₄ activities were further evaluated utilizing photocatalytic methods through degradation using methylene blue dye under sunlight with the estimated value indicating 75% photodegradation for rGO/Ag₂WO₄. Furthermore, it was determined the nanocomposite exhibited moderate antimicrobial activity against selected bacterial and fungal pathogens, acknowledging the utilization potential of this designed novel composite for antimicrobial applications.</p>