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Author(s): |
Li Zhang, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
Ke-long Huang, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
Hao Chen, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
Jian-hui Yan, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China |
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Abstract: |
CuFe2O4 Photocatalyst was synthesized by a facile citric acid (CA)-assisted sol-gel method, and characterised by transmission electron microscopy (TEM), X-ray diffraction (XRD) and UV–vis diffuse reflectance spectrum (UV–vis DRS). The sample prepared has a good solar light absorption ability and composed of almost uniform nanoparticles with a grain size of about 80 nm and crystallized in a tetragonal crystal phase structure. Then the photocatalytic inactivation of Escherichia coli under simulated solar light irradiation (λ= 200-900 nm) was performed with the photocatalyst to investigate the photocatalytic bactericidal capability. The results showed that CuFe2O4 has different sterilization activity with the change of the calcination tempreature. when the calcination temperature is 700 ?C, the photocatalyst exhibited the optimal photocatalytic sterilization activity. The survival ratio of Escherichia coli is only 5.6% upon 60 min irradiation, whereas that with no light irradiation as a dark control and without photocatalyst as a control still reaches 94.4% and 87.4%, respectively, under the same conditions. It is shown that CuFe2O4 has no toxic itself and is a good visible -light photocatalyst.
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