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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 Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 721Pages:784-794 |
| Abstract | 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. |
| 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 |
| Keyword | Bismuth Vanadate Bismuth Oxyiodide Photocatalyst Band Alignment Photocatalytic Activity |
| Subject Area | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Organization | 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] |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/78006 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Shan, 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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