To address the increasing challenges of clean energy and environmental issues, the development of green technology is of prime importance . Among all techniques, the visible light active (VLA) photocatalyts could convert directly solar energy to chemical energy. In this work, VLA photocatalysts, Ag-doped graphitic carbon nitride (g-C3N4) with different amounts of silver were prepared to degrade an azo dye, RB5 under visible light irradiation. The prepared photocatalys were characterized by several techniques including X-ray diffraction, field emission scanning microscopy, BET surface area, UV-Vis, and photoluminescence spectrophotometer. The photocatlyst containing 2% Ag showed the superior photocatalytic activity compared to gC3N4 nanosheets and 1% Ag doped g-C3N4. The enhanced photocatalytic performance may be due to the synergic effect between Ag and porous g-C3N4 for suppressing the recombination of photogenerated electron-hole pairs.

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