Green synthesis of Ag/MgO nanocomposites from red pepper seed waste for efficient sunlight-driven diclofenac degradation: experimental investigation and EEFO-optimized DT_LSBoost predictive modeling
Using Capsicum annuum L. (red pepper) seed extract as a natural reducing and capping agent, this study green-synthesized Ag/MgO nanocomposites, systematically evaluated sunlight-driven diclofenac degradation across irradiation time, catalyst dosage, Ag loading, pH, initial DCF concentration, electrolyte type and concentration, and irradiation source, found that 10% Ag/MgO was most active, achieving 80% degradation of 10 mg/L diclofenac within 180 min with hydroxyl radicals identified as the dominant reactive species, and developed an EEFO-optimized DT_LSBoost model (R = 0.9999; RMSE = 1.2 × 10⁻³) with a MATLAB graphical interface for rapid prediction.