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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
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume721Pages:784-794
AbstractOne 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.
description.department[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
KeywordBismuth Vanadate Bismuth Oxyiodide Photocatalyst Band Alignment Photocatalytic Activity
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationEducation 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]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78006
Collection中国科学院金属研究所
Corresponding AuthorShan, LW (reprint author), Harbin Univ Sci & Technol, Coll Mat Sci & Engn, Harbin 150040, Peoples R China.
Recommended Citation
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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