Photocatalytic in situ H_(2)O_(2) production and activation for enhanced ciprofloxacin degradation over CeO_(2)-Co_(3)O_(4)/g-C_(3)N_(4):key role of CeO_(2)  

作　　者：Hong-Jie Zhu Yi-Kai Yang Ming-Hui Li Lu-Ning Zou Hai-Tao Zhao 

机构地区：[1]Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology,School of Chemistry and Chemical Engin [2]College of Ecology and Environment,Anhui Normal University,Wuhu241002,China [3]Liaocheng YiLu Advanced Materials Co.,Ltd,Liaocheng 252000,China

出　　处：《Rare Metals》2024年第6期2695-2707,共13页稀有金属（英文版）

基　　金：financially supported by Shandong Provincial Natural Science Foundation(No.ZR2021QB123);Liaocheng University Start-up Fund for Doctoral Scientific Research(No.318052017);the Open Fund of State Key Lab of Pollution Control and Resource Reuse Research,China(No.PCRRF20002)。

摘　　要：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 ecologically sustainable degradation strategy.Herein,we demonstrated that g-C_(3)N_(4) decorated with the coordinated CeO_(2)and Co_(3)O_(4)(CeO_(2)-Co_(3)O_(4)/CN)exhibited effective ciprofloxacin photodegradation via in situ H_(2)O_(2) production and activation mechanism.Results indicate that the introduced CeO_(2) enhances the transference of photogenerated electrons to O_(2) by adjusting the oxygen vacancy of photocatalyst,thereby increasing the generation of superoxide radicals,which in turn generate H_(2)O_(2),resulting in a 22.4-fold increase in H_(2)O_(2) generation over g-C_(3)N_(4).Moreover,the in situ H_(2)O_(2)generation facilitated by CeO_(2) is confirmed to be essential for ciprofloxacin degradation via CeO_(2)-Co_(3)O_(4)/CN,as it provides enough oxidant for Co_(3)O_(4) to activate into hydroxyl radicals for the pollutants degradation.Ultimately,CeO_(2)-Co_(3)O_(4)/CN achieves a ciprofloxacin degradation ratio of 97.7%within 80 min.This study introduces a novel approach that combines H_(2)O_(2) generation and activation,offering an innovative perspective for achieving clean and efficient purification of antibiotic-contaminated water.

关 键 词：CeO_(2) In situ H_(2)O_(2)generation Ciprofloxacin degradation Photocatalyst 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X703[环境科学与工程—环境工程]