Bi-MOF-derived Hollow BiOBr nanorods for Efficient Photocatalytic Degradation of Ciprofloxacin
With the increasing use of antibiotics,antibiotic-induced water pollution is more serious,and a feasible solution is needed to remediate antibiotic-containing wastewater.Photocatalysis is an attractive technological strategy with the inexpensive and highly effective advantages.In this paper,hollow BiOBr nanorods(hBOB)were prepared for the efficient photocatalytic degradation of ciprofloxacin(CIP)using Bi-MOF(CAU-17)as a template.Compared with BiOBr nanosheets(sBOB),hBOB have larger specific surface area and higher charge separation efficiency.The degradation efficiency under simulated sunlight for 30 min reached 92.5％,and the degradation rate constant was 2.5 times higher than that of sBOB.The enhanced photodegradation ability was analyzed by diffuse reflectance of solids(DRS),fluorescence(PL),photocurrent(I-t),and impedance(EIS)characterization.The results indicate that the presence of porous structure and nanosheet assembly shortens the diffusion distance of carriers and facilitates the separation and transfer of photogenerated carriers,and thus hBOB has a good ability to remove CIP.In addition,the mechanism of photocatalytic degradation of CIP was also investigated using Mott Schottky test(M-S)and electron spin resonance(ESR)characterization.
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