BackgroundThe implementation of semiconductor photocatalyst engineering offers a promising solution to combat water pollution and energy crises by efficiently converting solar energy into chemical energy for organic dye decomposition. MethodsBy hydrothermal method nanostructures of Ag6Si2O7/WSe2 were synthesized and investigated their effectiveness in solar-driven photo-degradation of rhodamine B (RhB) and Methylene Blue (MB) dyes. Ag6Si2O7/WSe2 nanocomposites were developed by varying the weight percentage of WSe2 from 0 to 25 % in the Ag6Si2O7 matrix. The physicochemical properties of the nanocomposites were analyzed by using various techniques such as XRD, FE-SEM, and TEM/HRTEM. Additionally, the optical properties were investigated using UV–Vis, PL, and EIS. Significant findingsAccording to the BET study, the AgWS-c composite exhibited the highest BET surface area at 47.56 m2/g and outperformed other composites by achieving degradation rates of 96.24 % for RhB and 97.70 % for MB within 50 min. The rate constant of AgWS-c (0.0513 min−1) was 16.54 times higher than that of Ag6Si2O7 and 2.63 times more than WSe2 pristine, indicating its efficacy in dye degradation. ESR analysis assessed ROS species activity, LC/MS identified degradation intermediates, and a degradation mechanism pathway for RhB was proposed. The findings suggest that AgWS-c is a promising candidate for rapid and efficient wastewater treatment.