<p>The development of innovative and effective photocatalysts has garnered considerable scientific interest in recent years, aimed at achieving ecologically sustainable solution. We synthesized Ag₂O nanoparticles-anchored g-C₃N₄/AC photocatalyst using Sol-gel method and examined its photocatalytic degradation efficiency against the antibiotic-Amoxicillin. The synthesized catalyst underwent comprehensive characterization through various analytical techniques, such as XRD, FT-IR, SEM, EDX, TEM, XPS, UV-visible DRS, PL, BET, and EIS. The findings indicate that the Ag₂O nanoparticles are effectively distributed on g-C₃N₄/AC, producing the ternary Ag₂O/g-C₃N₄/AC nanocomposite that demonstrates superior photocatalysis over pristine g-C₃N₄ nanoparticles. The Ag₂O/g-C₃N₄/AC composite exhibited a degradation efficiency of aproximately 95.98% following 70&#xa0;min of UV-visible light irradiation. Kinetic experiments demonstrated pseudo-first-order behaviour, with the composite showing over a threefold increase in the apparent rate constant relative to pristine g-C₃N₄. Stability and reusability assessments demonstrated exceptional photostability, with only negligible efficiency reduction after four consecutive cycles. Scavenger tests revealed that the degradation process is predominantly regulated by O₂^·− and ^·OH active species, while photoexcited h⁺ plays a minor role. The improved separation of photo-induced charge carriers in Ag₂O/g-C₃N₄/AC photocatalyst significantly improved the photocatalytic degradation of AMX. This research demonstrates the exceptional performance of Ag₂O/g-C₃N₄/AC as a photocatalyst for the degradation of AMX, providing a practical solution for wastewater clean-up.</p> Graphical Abstract <p></p>