Hydrogenated LaFeO3 with oxygen vacancies for Enhanced Visible light photocatalytic performance

A novel hydrogenated LaFeO 3 was fabricated and firstly used as photocatalyst in the application of visible-light photocatalytic decomposition of organic contaminant. Through the adjusting of annealing atmosphere and temperature, a series of treated LaFeO 3 with oxygen vacancies were obtained. Compared with untreated LaFeO 3 and argon treated LaFeO 3 , hydrogenated LaFeO 3 photocatalysts exhibited higher catalytic ability. This notably improved catalytic ability was mainly assigned to the formation of disordered layer on the surface of hydrogenated LaFeO 3 . The surface oxygen vacancies of LaFeO 3 caused by hydrogenation were beneficial to light absorption and separation of photogenerated carriers . In this system, we found the amount of surface oxygen vacancies had a direct impact on the catalyst ability of hydrogenated LaFeO 3 photocatalysts. In addition, the magnetic hydrogenated LaFeO 3 photocatalysts were stable, and reused after five times without obvious decrease of catalytic ability.