Abstract
Novel magnetically separable Ag3PO4/CoFe2O4/graphene oxide (GO) composites with different mass ratios were prepared through a facile precipitation process. Photocatalytic activity of the as-prepared composites was evaluated by degrading methyl orange (MO) under visible light irradiation. The results indicated that Ag3PO4/CoFe2O4/GO exhibited higher degradation efficiency for MO compared with pure Ag3PO4. The enhanced photocatalytic performance of Ag3PO4/CoFe2O4/GO can be attributed to the effective separation of photoinduced electron-hole pairs. Radical-trapping experiments showed that holes and superoxide radicals were dominant radicals in the degradation process. According to the experimental results, a possible photocatalytic mechanism was also proposed. Furthermore, the Ag3PO4/CoFe2O4/GO composites can be easily separated from the reaction solution by an external magnet due to the existence of CoFe2O4.
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