典型文献
Preparation of Bi2O3/BiOI Step-scheme Heterojunction Photocatalysts and Their Degradation Mechanism of Methylene Blue
文献摘要：
Bi2O3/BiOI step-scheme(S-scheme)heterojunction photocatalyst was synthesized by green calcination method,its degradation ability of methylene blue was investigated,and the photocatalytic performance of the Bi2O3/BiOI heterojunction,Bi2O3 and BiOI was compared.The structure and morphology of the samples were characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),and UV-vis diffuse reflection spectrum(UV-vis DRS).The degradation rate of methylene blue was analysised by spectrophotometry,and the calculation result showed that the degradation rate of methylene blue was 97.8％in 150 minutes.The first order kinetic rate constant of 10％Bi2O3/BiOI is 0.021 8 min-1,which are 2.37 and 2.68 times of BiO1(0.009 18 min-1)and Bi2O3(0.008 03 min-1)respectively.The calculation result shows that the work function of Bi2O3 and BiOI are 3.0 eV and 6.0 eV,respectively,by density functional theory(DFT).When this S-scheme heterojunction is used as a photocatalyst,the weaker electrons in the conduction band of BiOI will be combined with the weaker holes in the Bi2O3 valence band under combined effect with built-in electric field and band bending,which will retain stronger photoelectrons and holes between Bi2O3 and BiOI.This may be the internal reason for the efficient degradation of tetracycline by Bi2O3/BiOI S-scheme heterostructures.
文献关键词：
中图分类号：
作者姓名：
JIANG Xuechao;TAN Haiyan;SHI Xinyu;CHENG Xinhua;HU Weibing;HU Xinhui
作者机构：
Key Laboratory of Green Manufacturing of Super-light Elastomer Materials of State Ethnic Affairs Commission,School of Chemistry and Environmental Engineering,Hubei Minzu University,Enshi 445000,China;Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi University for Nationalities,Nanning 530006,China;State Key Laboratory of Advanced Technology for Materi-als Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
文献出处：
引用格式：
[1]JIANG Xuechao;TAN Haiyan;SHI Xinyu;CHENG Xinhua;HU Weibing;HU Xinhui-.Preparation of Bi2O3/BiOI Step-scheme Heterojunction Photocatalysts and Their Degradation Mechanism of Methylene Blue)[J].武汉理工大学学报（材料科学版）（英文版）,2022(05):801-806
A类：
analysised,BiO1,photoelectrons
B类：
Preparation,Bi2O3,BiOI,Step,scheme,Heterojunction,Photocatalysts,Their,Degradation,Mechanism,Methylene,Blue,step,heterojunction,photocatalyst,was,synthesized,by,green,calcination,method,its,degradation,ability,methylene,blue,investigated,photocatalytic,performance,compared,morphology,samples,were,characterized,ray,diffraction,field,emission,scanning,microscopy,FESEM,UV,vis,diffuse,reflection,spectrum,DRS,rate,spectrophotometry,calculation,result,showed,that,minutes,first,order,kinetic,constant,which,times,respectively,shows,work,eV,density,functional,theory,DFT,When,this,used,weaker,conduction,band,will,combined,holes,valence,under,effect,built,electric,bending,retain,stronger,between,This,may,internal,reason,efficient,tetracycline,heterostructures
AB值：
0.496453
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