高等学校化学学报2024，Vol.45Issue(1)：55-66,12.DOI:10.7503/cjcu20230370
CuBi2O4/Bi2WO6 Z型异质结用于光电类芬顿体系下高效降解环丙沙星
CuBi2O4/Bi2WO6 Z-type Heterostructures for Effective Removal Ciprofloxacin in Photo-electro-Fenton-like System
摘要
Abstract
In response to the serious problem of antibiotic pollution in the current water environment,herein,a CuBi2O4/Bi2WO6(CBWO)Z-type heterojunction photoelectric catalyst was synthesized by a simple solvothermal method.The morphology and structure were obtained through SEM,which showed that the structure of the CBWO-60 was cuboid rod-like morphology and nanosheet.The EDS elemental mapping images displayed that Cu,W,Bi and O elements were evenly dispersed in CBWO-60.The crystalline phases and molecular structures of the catalyst were determined by XRD and FTIR.These results firmly confirmed that the successful synthesis of the composite.The large specific surface area of CBWO-60 was investigated via BET.XPS analysis proved that the Cu+ and Cu2+ coexisted,which promoted the cycling of Fenton reaction.Moreover,the displacement of binding energy well verified the strong electronic interaction rather than a physical contact between CuBi2O4 and Bi2WO6 in the heterojunction.The band structure of the heterojunction was proved by UV-Vis DRS and VB-XPS analysis.The interface charge transfer situation of the heterojunction was investigated by PL,EIS,and transient photocurrent response spectra.In a series of catalysts,CBWO-60 has the highest degradation efficiency for Ciprofloxacin(CIP)in the photo-electro-Fenton-like(PEF-like)system,with a degradation efficiency of 98.0％at 90 min.At the same time,when the initial pH of the solution was in the range of 2-6,the system could always maintain effective CIP removal efficiency.The pH range of this system was broadened to some extent compared to the conventional Fenton method.In the PEF-like system,CBWO-60 showed high catalytic activity to quinolone,sulfonamides and tetracycline antibiotics,which proved the universality of CBWO-60.Finally,the degradation efficiency of CIP still maintained 87.8％after five cycles of experiments,and the crystal structure of CBWO-60 remained unchanged after the reaction.Based on the results of HPLC-MS,five possible pathways for CIP degradation were proposed.This study provided a new idea for the purification and treatment of antibiotic pollution in the water environment.关键词
光电类芬顿体系/铋酸铜/钨酸铋/Z型异质结/环丙沙星/活性氧物种Key words
Photo-electro-Fenton-like system/CuBi2O4/Bi2WO6/Z-type heterojunction/Ciprofloxacin/Reactive oxygen species分类
化学化工引用本文复制引用
王秋霞,韩玉贵,赵鹏,王爽,刘亚茹,李轶..CuBi2O4/Bi2WO6 Z型异质结用于光电类芬顿体系下高效降解环丙沙星[J].高等学校化学学报,2024,45(1):55-66,12.基金项目
国家自然科学基金(批准号:22376157,22176140,U19B2010).Supported by the National Natural Science Foundation of China(Nos.22376157,22176140,U19B2010). （批准号:22376157,22176140,U19B2010）
