Preparation of Easily Separated and Recovered BiOBr/TiO2/PAN Catalyst and Photocatalytic Degradation of Tetracycline Hydrochloride
A lot of research has been done to improve the photocatalytic activity of TiO2 with BiOBr.However,most of the work synthesized a powder structure,which has the problem of being difficult to recycle.In this paper,flexible BiOBr/TiO2/PAN nanofiber membranes were prepared by electrostatic spinning technique combined with solvothermal method,which makes them easy to be recycled due to their unique self-supporting membrane structure.The structure and morphology of prepared nanofiber membrane were characterized by SEM,TEM,XPS,XRD and BET,and the photoelectric properties of it were analyzed by UV-Vis DRS,EIS and i-t test.The results showed that its photocatalytic activity for the degradation of tetracycline hydrochloride(TC)under visible light irradiation was enhanced compared with that of TiO2/PAN alone,and the degradation efficiency reached 72.97％within 140 min;the catalytic performance of the catalysts tended to be stabilized in the five cycling experiments,and the post-cycling XRD and SEM showed that the catalyst morphology and crystal structure did not change,demonstrating excellent durability.
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