Abstract:Fe 2+ -H 2 O 2 Fenton system is widely applied in water treatment nowadays, but the acidification and sludge generation are crucial problems to be solved. Herein, we report that Fe 3 O 4 /TiO 2 /C nanocomposites (FTCNCs) were able to catalyze the decomposition of H 2 O 2 at neutral pH and can be applied in dye decoloration. FTCNCs were prepared by precipitating TiO 2 on Fe 3 O 4 cores via the hydrolysis of tetrabutyl titanate followed by the hydrothermal dehydrogenization of glucose to deposit carbon on Fe 3 O 4 /TiO 2 . The decoloration of methylene blue (MB) in the FTCNC-H 2 O 2 Fenton-like system was monitored to reflect the catalytic activity of FTCNC. The radical generation capability was analyzed by electron spin resonance. Our results indicated that FTCNC-H 2 O 2 Fenton-like system was efficient in decolorizing MB, and the radicals led to the near complete oxidation of MB. The FTCNC-H 2 O 2 Fenton-like system could be used in a wide pH range of 4-9. A greater catalyst amount, a higher H 2 O 2 concentration, and a higher temperature accelerated the decoloration kinetics. FTCNCs showed good activity after the regeneration of 8 cycles. The implication to the practical applications of FTCNCs in water treatment is discussed.