فهرست نشریات علمی دسترسی آزاد ایران

This study reports the green synthesis of titanium dioxide nanoparticles (TiO₂ NPs) using Lansium domesticum Correa (LdC) peel extract as a natural stabilizing and reducing agent. The synthesized TiO₂ NPs exhibited a band gap of 3.2 eV and a zeta potential of –47 mV, indicating strong colloidal stability. Their photocatalytic performance was evaluated in the degradation of Acid Yellow 25 (AY25) under various light sources, where UV-A irradiation showed the highest activity. The effects of dye concentration, pH, catalyst dosage, and exposure time were systematically investigated. Optimal conditions (0.1 g catalyst, 20 mg L-1 AY25, pH 3, 240 min) resulted in 95% degradation efficiency, following pseudo first order kinetics (R² = 0.9932). Reusability studies demonstrated stable performance across three cycles with efficiencies of 82%, 78%, and 73%. Scavenger tests identified e⁻, •O₂⁻, •OH, and h⁺ as the main reactive species involved in degradation. These findings highlight the potential of green synthesized TiO₂ NPs as efficient, reusable photocatalysts for sustainable wastewater treatment and environmental remediation.