摘要
在沉淀法制备BiOI的基础上,通过进一步固相热转化形成Bi_(5)O_(7)I。采用X射线衍射(XRD)、紫外可见漫反射光谱(UV-Vis)、扫描电镜(SEM)、光致发光光谱(PL)对BiOI和Bi_(5)O_(7)I的晶体结构、吸光性能、能带结构、形貌及光生载流子分离效率进行分析研究。基于Bi_(5)O_(7)I良好的能带结构及优异的光生载流子分离效率,可见光下Bi_(5)O_(7)I在180 min内可全部灭活大肠杆菌(E.coli),其性能明显优于BiOI,并通过细胞染色及SEM观察抗菌过程E.coli的存活状态及细胞形态变化,h+和·OH是Bi_(5)O_(7)I光催化灭活E.coli过程中的主要的活性基团。
Bi_(5)O_(7)I was synthesized by solid phase thermal conversion of BiOI which was prepared through the precipitation method.X-ray diffraction(XRD),ultraviolet-visible diffuse reflection spectra(UV-Vis),scanning electron microscopy(SEM),and photoluminescence spectra(PL)were performed to investigate the crystal structure,light absorption performance,band structure,morphology and photoinduced charges separation of BiOI and Bi_(5)O_(7)I.Based on the good band structure and excellent photoinduced charges separation efficiency,Bi_(5)O_(7)I could inactivate E.coli completely under visible light irradiation for 180 min which was significantly better than BiOI.The live/dead E.coli was studied by cell staining and the morphology change of E.coli was observed by SEM.Furthermore,h+and·OH were the predominant reactive species which could make the E.coli cells inactivated in the photocatalytic disinfection process of Bi_(5)O_(7)I.
作者
马占强
郭葳
张凯悦
许雁翀
李娟
MA Zhan-qiang;GUO wei;ZHANG Kai-yue;XU Yan-chong;LI Juan(College of Agriculture,Henan University of Science and Technology,Luoyang 471000,China;School of Environmental Engineering and Chemistry,Luoyang Institute of Science and Technology,Luoyang 471023,China)
出处
《化学研究与应用》
CAS
北大核心
2023年第2期407-413,共7页
Chemical Research and Application
基金
河南省科技攻关项目(222102320224,212102110417)资助
河南省高等学校重点科研项目(21A610008,21A180005)资助
洛阳理工学院高层次人才科研启动项目(2017BZ13)资助。
