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ZnO nanorods (NRs)/Fe 3 O 4 quantum dots (QDs) nanocomposites were successfully synthesized via an easy electrostatic self-assembly method. The results showed that Fe 3 O 4 QDs with an average diameter of 4-5 nm were well dispersed on the surface of the ZnO NRs with an average diameter of 118 nm, forming ZnO NRs/Fe 3 O 4 QDs nanocomposites. The ZnO NRs/Fe 3 O 4 QDs nanocomposites were used as photocatalysts for the degradation of Rhodamine B under solar light irradiation. The kinetic rate constant of the ZnO NRs/Fe 3 O 4 QDs nanocomposites was two times higher than that of the ZnO NRs. The enhanced photocatalytic property was attributed to the extended absorption spectrum of the nanocomposites.

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