Sustainable Fabrication of Al2O3-Based Hybrid Nanocomposite Membranes for Enhanced Photocatalytic Degradation of Organic Pollutants in Water Treatment
A green, cost-effective method was developed for the synthesis of aluminum oxide nanoparticles (Al2O3 NPs) using tea leaf extract as a natural reducing and stabilizing agent. The nanoparticles were characterized by FTIR, XRD, SEM and DLS, confirming nanoscale dimensions, spherical morphology and crystalline structure. Their photocatalytic activity was evaluated through the degradation of Reactive Black 5 (RB5) under UV irradiation, with attention to catalyst dosage, initial dye concentration, irradiation time and solution pH. Additionally, Al2O3 NPs were incorporated into cellulose acetate (CA) ultrafiltration membranes using the phase inversion technique. The resulting nanocomposite membranes demonstrated enhanced hydrophilicity, permeability and RB5 rejection efficiency compared to membrane CA membranes. The integration of photocatalysis with ultrafiltration provides a promising eco-friendly approach for textile wastewater treatment.