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Sonocatalytic degradation of ciprofloxacin by BiOBr/BiFeO3
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NSTL
A novel BiOBr/BiFeO3 heterojunction sonocatalyst was prepared and characterized.The sonocatalytic activity of BiOBr/BiFeO3 composite was evaluated by the catalytic degradation of ciprofloxacin.BiOBr/BiFeO3 composite combined with persulfate had excellent sonocatalytic activity for ciprofloxacin degradation under ultrasonic irradiation,and the degradation rate was 73.64% ± 7.96%.The formation of Z-type heterojunction of BiOBr/BiFeO3 and the generation of hydroxyl radical,superoxide anion and hole were the key to the catalytic activity of BiOBr/BiFeO3.Free radicals will attack the positions of piperazine ring,cyclopropyl,C-F bond,carboxyl group and ethylenic linkage in ciprofloxacin structure,and gradually degrade ciprofloxacin through multiple paths.After the sonocatalytic degradation,the bacteriostatic effect of the solution decreased significantly and the environmental pollution decreased significantly.As a sonocatalyst,BiOBr/BiFeO3 composite has good degradation and removal effect on ciprofloxacin and has practical application potential.Meanwhile,it lays a foundation for the further practical application of sonocatalytic degradation technology.
NSTL
