Optimized Synthesis of Fe2TiO5 Nanoparticles for Efficient and Reusable Visible-Light-Driven Photocatalytic Degradation of Organic Dyes

Pseudobrookite-type Fe 2 TiO 5 semiconductor nanoparticles were systematically synthesized via a co-precipitation method for the photodegradation of organic pollutants. The dual-level optimization from nanomaterial fabrication to reaction environment tuning enables a rational understanding of the factors governing photocatalytic efficiency. Optimal synthesis conditions were achieved using a 20% excess of Ti 4+ , a pH of 8, one-time ammonia addition, and calcination at 800°C for 6 h. The photocatalyst achieved 99.4% degradation efficiency for methylene blue (MB) under visible light with a 75-mg catalyst dosage, a 10-mg/L MB solution, at pH 6, and the addition of 7 mL H 2 O 2 . The photogenerated electron–hole pairs reacted with surface species to produce ·O 2 − and ·OH that degrade MB molecules oxidatively. The catalyst exhibited versatility and excellent recyclability, maintaining high activity over four consecutive cycles with only a minor decrease in efficiency. This study establishes the optimal synthesis parameters and reaction conditions for Fe 2 TiO 5 nanoparticles in visible-light photocatalysis.