Constructing recyclable NiFe2O4/MoS2 Z-scheme photocatalysts with enhanced catalytic activity

In this work, a magnetically separable NiFe 2 O 4 /MoS 2 nanocomposite was prepared by in-situ growth of NiFe 2 O 4 nanoparticles on the ultrathin MoS 2 nanosheets through a mild hydrothermal method. Benefiting from the enhanced absorption of visible light and efficient separation of photo-generated holes and electrons, the NiFe 2 O 4 /MoS 2 nanocomposite exhibited excellent photocatalytic activity for the degradation of rhodamine (RhB). Additionally, it was found that the mass ratio of MoS 2 and NiFe 2 O 4 greatly affected their photocatalytic activity. Particularly, the NiFe 2 O 4 /MoS 2 nanocomposite (MN-3) with 25 wt% NiFe 2 O 4 could photodegrade 92.85% of RhB within 120 min, which was about 3.3 and 4.5 times higher than that of bare MoS 2 and NiFe 2 O 4 , respectively. Moreover, it can be easy separated under external magnetic field, and maintain good photocatalytic activity after ten cycles reactions.