<p>Maximum antimicrobial efficiency of silver nanoparticles (Ag NPs) are obtained when it is well distributed over a template. In this study, Ag NPs are decorated over graphitic carbon nitride (g-C₃N₄) nanosheets by reducing silver precursor using ascorbic acid with room temperature sonication process. Size and decoration of the Ag NPs is controlled by varying the concentration of silver precursor. Presence of crystalline Ag NPs were confirmed by powder X-ray diffraction patterns and 2D nanosheet structure of g-C₃N₄ with silver decoration is visualized through scanning electron microscopy and transmission electron microscopy techniques. The band gap of pristine g-C₃N₄ is narrowed by Ag loading and causing a red shift in absorption edge of pristine g-C₃N₄. Heptazine heterostructure of g-C₃N₄ made up of C-N and C = N bands are confirmed through Fourier transform infrared spectroscopy. Bactericidal effect of the synthesized g-C₃N₄ nanosheets, Ag NPs, and Ag/g-C₃N₄ were examined using agar well diffusion method on the pathogens namely Staphylococcus aureus (<i>S. aureus</i>) a gram positive bacteria and Escherichia coli (<i>E. coli</i>) a gram negative bacteria. The g-C₃N₄ nanosheets are suitable 2D material to act as a template for Ag NPs decoration. This helps us in realizing the true potential of the Ag NPs as an antibacterial agent. The sample with maximum concentration of Ag NPs have 87.5% and 88.2% zone of inhibition as antibacterial efficiency of standard against <i>E. coli</i> and <i>S. aureus</i>, respectively.</p>