Abstract
Bi2WO6 nanosheets were uniformly grown on electrospun ZnFe2O4 nanofibers via a solvothermal technique. The loading amounts of Bi2WO6 in the Bi2WO6/ZnFe2O4 heterostructures nanofibers could be controlled by adjusting the precursor concentration in solvothermal process. Under visible-light irradiation, the degradation rate constant (rhodamine B) of the Bi2WO6/ZnFe2O4 heterostructures was 11.6 times than that of pure ZnFe2O4 nanofibers and 5.8 times than that of pure Bi2WO6 nanosheets, mainly owing to the effective separation of the photogenerated electron-hole pairs in the Bi2WO6/ZnFe2O4 heterostructures. Notably, the Bi2WO6/ZnFe2O4 heterostructures nanofibers could be easily separated from the solution under an external magnetic field by employing the ferromagnetic behaviors of ZnFe2O4. After several cycles, the photocatalytic activity of the Bi2WO6/ZnFe2O4 heterostructures nanofibers did not decrease significantly suggesting that the Bi2WO6/ZnFe2O4 heterostructures possess stable characteristics. This kind of Bi2WO6/ZnFe2O4 heterostructures nanofibers with high visible-light photocatalytic activity, excellent stability and excellent recyclability could be significance in environmental application.
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