Surface modified silver/magnetite nanocomposite activating hydrogen peroxide for efficient degradation of chlorophenols.

The mixed-valent magnetite (FeO) played a critical role in HO-based Fenton-like system for the removal of chlorophenols, but high activity and cycle stability of the FeO-based catalysts are still a huge challenge. Herein, a series of surface hydroxyl- and carboxyl-modified Ag/FeO nanocomposite catalysts were prepared and used to activate HO for degradation chlorophenols pollutants. Under the optimized condition, nearly 100% degradation ratio were achieved within 2-30 min for 2,4-dichlorophenol, 2,3-dichlorophenol, 3,4-dichlorophenol, 2,4,6-trichlorophenol, p-nitrophenol, and 98% degradation ratio for 2,5-dichlorophenol, 2,6-dichlorophenol and 3,5-dichlorophenol,.