Background: The hybrid photocatalysts constructed with various semiconductor and graphene
can show dramatically enhanced photocatalytic activities. The separability of a photocatalyst
from degraded pollutant aqueous solution is very important in some cases.
Objective: The magnetic MnFe2O4 nanoparticles and reduced graphene oxide were used to construct
magnetically separable (rGO)-MnFe2O4 hybrids with high photo- catalytic properties.
Method: The pure MnFe2O4 nanoparticles and rGO/MnFe2O4 hybrid photocatalysts were synthesized
with a facile hydrothermal process.
Results: The nanoparticles showed great sunlight-excited photocatalytic and Fenton- like photocatalytic
activities in the photodegradation of dye solution. Introducing rGO resulted in further enhancement
of the activity compared to the nanoparticles. The effect of initial dye solution pH and H2O2 on
the activities were also studied. The greater activities of the hybrids are ascribed to good interface
charge transfer that was verified by the estimation of optical conductivity and band energy level. The
hybrids also showed an magnetically separable performance from degraded pollutant solution.
Conclusion: This work suggested a facile method to synthesize the magnetic MnFe2O4 nanoparticles and
rGO/MnFe2O4 hybrids. The hybrids are an promising photocatalytic materials for environmental applications.