Abstract
The abused ciprofloxacin antibiotics have caused significant environmental damage.Although oxidative degradation of ciprofloxacin exhibits promising efficacy,it often entails excessive energy consumption.Hence,it is necessary to explore an effective and ecolog-ically sustainable degradation strategy.Herein,we demonstrated that g-C3N4 decorated with the coordinated CeO2 and Co3O4(CeO2-Co3O4/CN)exhibited effective ciprofloxacin photodegradation via in situ H2O2 production and activation mechanism.Results indicate that the intro-duced CeO2 enhances the transference of photogenerated electrons to O2 by adjusting the oxygen vacancy of pho-tocatalyst,thereby increasing the generation of superoxide radicals,which in turn generate H2O2,resulting in a 22.4-fold increase in H2O2 generation over g-C3N4.Moreover,the in situ H2O2 generation facilitated by CeO2 is con-firmed to be essential for ciprofloxacin degradation via CeO2-Co3O4/CN,as it provides enough oxidant for Co3O4 to activate into hydroxyl radicals for the pollutants degradation.Ultimately,CeO2-Co3O4/CN achieves a ciprofloxacin degradation ratio of 97.7％within 80 min.This study introduces a novel approach that combines H2O2 generation and activation,offering an innovative perspective for achieving clean and efficient purification of antibiotic-contaminated water.
基金项目
山东省自然科学基金(ZR2021QB123)
Liaocheng University Startup Fund for Doctoral Scientific Research(318052017)
Open Fund of State Key Lab of Pollution Control and Resource Reuse Research,China(PCRRF20002)
NETL
NSTL
万方数据