Flexible PAN-Bi2O2CO3–BiOI heterojunction nanofiber and the photocatalytic degradation property
In this paper, one-dimensional PAN-Bi 2 O 2 CO 3 –BiOI photocatalytic nanofibers were prepared using flexible PAN nanofibers as carriers. Bi 2 O 2 CO 3 was first grown on the surface of PAN nanofibers, and then BiOI was loaded on Bi 2 O 2 CO 3 by ion exchange method. The characterization results showed that PAN-Bi 2 O 2 CO 3 –BiOI nanofibers have a diameter of about 210 nm and regular fiber morphology. The results of UV–Vis diffuse reflectance spectroscopy, XRD and XPS showed that Bi 2 O 2 CO 3 –BiOI composed of granular semiconductor nano heterostructures with high specific surface area were uniformly loaded on the surface of PAN fiber . The photocatalytic degradation experiment of the material showed high visible light photocatalytic activity . The preparation of Bi 2 O 2 CO 3 –BiOI heterojunction improved the photoelectron hole separation efficiency of BiOI under visible light. PAN-Bi 2 O 2 CO 3 –BiOI fibers showed high photocatalytic degradation efficiency for rhodamine B. The degradation efficiency was more than 95% within 120 min irradiation. Free radical trapping experiments showed photocatalysts mainly produced O 2 − ,·OH and h + , which played a major role in photocatalysis .
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