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Enhanced photocatalytic activity with a heterojunction between BiVO4 and BiOI
Shan, Lianwei; Liu, Yuteng; Bi, Jingjing; Suriyaprakash, Jagadeesh; Han, Zhidong; Shan, LW (reprint author), Harbin Univ Sci & Technol, Coll Mat Sci & Engn, Harbin 150040, Peoples R China.
2017-10-15
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号721页码:784-794
摘要One of the current key issues in the photocatalysis is to obtain the band alignment of coupled semiconductor experimentally, which is the most significant aspect for understanding the efficient photo catalytic activity precisely. In this article, a BiVO4/BiOI{001}heterojunction was detected by the transmission electron microscopy (TEM). The results of electrochemical impedance spectroscopy (EIS) reveal that a higher efficiency of charge immigration across the electrode/electrolyte interface for the BiVO4/BiOl{001}. In addition, the electron lifetime was investigated by the Bode phase plots, which are responsible for the observed photocatalytic behaviors. As a result, the photocatalytic activities for rhodamine B (RhB) degradation and iodine ion oxidation are remarkably increased compared to the individual BiVO4 and BiOI{001). In fact, a direct band alignment in the BiVO4/BiOI{001} does not give well a logical interpreting on its photocatalytic behavior. However, through the valence-band offset formula, we demonstrated the exact band alignment of corresponding components in the BiVO4/BiOI(001). This band alignment was further confirmed by the PL spectra, which CM2 with photo-oxidation (Mn2+) is red shift and CM2 with photo-reduction (Ag+) is blue shift compared with CM2. (C) 2017 Elsevier B.V. All rights reserved.; One of the current key issues in the photocatalysis is to obtain the band alignment of coupled semiconductor experimentally, which is the most significant aspect for understanding the efficient photo catalytic activity precisely. In this article, a BiVO4/BiOI{001}heterojunction was detected by the transmission electron microscopy (TEM). The results of electrochemical impedance spectroscopy (EIS) reveal that a higher efficiency of charge immigration across the electrode/electrolyte interface for the BiVO4/BiOl{001}. In addition, the electron lifetime was investigated by the Bode phase plots, which are responsible for the observed photocatalytic behaviors. As a result, the photocatalytic activities for rhodamine B (RhB) degradation and iodine ion oxidation are remarkably increased compared to the individual BiVO4 and BiOI{001). In fact, a direct band alignment in the BiVO4/BiOI{001} does not give well a logical interpreting on its photocatalytic behavior. However, through the valence-band offset formula, we demonstrated the exact band alignment of corresponding components in the BiVO4/BiOI(001). This band alignment was further confirmed by the PL spectra, which CM2 with photo-oxidation (Mn2+) is red shift and CM2 with photo-reduction (Ag+) is blue shift compared with CM2. (C) 2017 Elsevier B.V. All rights reserved.
部门归属[shan, lianwei ; liu, yuteng ; bi, jingjing ; han, zhidong] harbin univ sci & technol, coll mat sci & engn, harbin 150040, peoples r china ; [suriyaprakash, jagadeesh] chinese acad sci, inst met res, shenyang natl lab mat sci, wenhua rd 72, shenyang 110016, peoples r china
关键词Bismuth Vanadate Bismuth Oxyiodide Photocatalyst Band Alignment Photocatalytic Activity
学科领域Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者Education Depas Intent Program of Heilongjiang Province [12541111]; Postdoctoral Scientific Developmental Fund of Heilongjiang Province [LBH-Q16122]; Program for Innovative Research Team in University of Heilongjiang Province [2013TD008]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78006
专题中国科学院金属研究所
通讯作者Shan, LW (reprint author), Harbin Univ Sci & Technol, Coll Mat Sci & Engn, Harbin 150040, Peoples R China.
推荐引用方式
GB/T 7714
Shan, Lianwei,Liu, Yuteng,Bi, Jingjing,et al. Enhanced photocatalytic activity with a heterojunction between BiVO4 and BiOI[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,721:784-794.
APA Shan, Lianwei,Liu, Yuteng,Bi, Jingjing,Suriyaprakash, Jagadeesh,Han, Zhidong,&Shan, LW .(2017).Enhanced photocatalytic activity with a heterojunction between BiVO4 and BiOI.JOURNAL OF ALLOYS AND COMPOUNDS,721,784-794.
MLA Shan, Lianwei,et al."Enhanced photocatalytic activity with a heterojunction between BiVO4 and BiOI".JOURNAL OF ALLOYS AND COMPOUNDS 721(2017):784-794.
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