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Defective crystal plane-oriented induced lattice polarization for the photocatalytic enhancement of ZnO.

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Title: Defective crystal plane-oriented induced lattice polarization for the photocatalytic enhancement of ZnO.
Authors: Bai, Xiaojuan1 (AUTHOR) baixiaojuan@bucea.edu.cn, Sun, Boxuan1 (AUTHOR), Wang, Xuyu1 (AUTHOR), Zhang, Tianshuo1 (AUTHOR), Hao, Qiang2 (AUTHOR), Ni, Bing-Jie2 (AUTHOR), Zong, Ruilong3 (AUTHOR), Zhang, Ziyang1 (AUTHOR), Zhang, Xiaoran1 (AUTHOR), Li, Haiyan1 (AUTHOR) heixia.1986@163.com
Source: CrystEngComm. 4/28/2020, Vol. 22 Issue 16, p2709-2717. 9p.
Subjects: Induced polarization, Crystal defects, Crystals, Crystal surfaces, Zinc oxide
Abstract: Defects can influence the properties of photocatalysts, and defective ZnO has triggered broad interest and intensive studies for decades. However, the correlation between crystal planes and defects remains unclear. Here, we demonstrate that the (101) plane is superior in producing oxygen vacancies than the (100) plane in rod-like defective ZnO samples. While the optimum intensity of the crystal ratio, (101)/(100), approaches 1, the separation efficiency of electrons–holes is much enhanced. Furthermore, it is found that the (101) plane has stronger spontaneous adsorption and higher dissociation activity of H2O, which is conducive to the spontaneous formation of oxygen vacancies and eventually enhances the separation efficiency of electrons–holes. The charge difference also shows that the crystal boundary junctions could cause uneven charge distribution, inducing lattice polarization and boosting the charge separation of defective ZnO, which is helpful for improving the photocatalytic activities. As a new proposed mechanism, the relationship between defect engineering and crystal surface could provide inspiration for the design of special nanomaterials for the environment purification and energy fields. [ABSTRACT FROM AUTHOR]
Copyright of CrystEngComm is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 142932202
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Defective crystal plane-oriented induced lattice polarization for the photocatalytic enhancement of ZnO.
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  Data: <searchLink fieldCode="AR" term="%22Bai%2C+Xiaojuan%22">Bai, Xiaojuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> baixiaojuan@bucea.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Sun%2C+Boxuan%22">Sun, Boxuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xuyu%22">Wang, Xuyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Tianshuo%22">Zhang, Tianshuo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hao%2C+Qiang%22">Hao, Qiang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ni%2C+Bing-Jie%22">Ni, Bing-Jie</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zong%2C+Ruilong%22">Zong, Ruilong</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Ziyang%22">Zhang, Ziyang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Xiaoran%22">Zhang, Xiaoran</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Haiyan%22">Li, Haiyan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> heixia.1986@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22CrystEngComm%22">CrystEngComm</searchLink>. 4/28/2020, Vol. 22 Issue 16, p2709-2717. 9p.
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– Name: Abstract
  Label: Abstract
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  Data: Defects can influence the properties of photocatalysts, and defective ZnO has triggered broad interest and intensive studies for decades. However, the correlation between crystal planes and defects remains unclear. Here, we demonstrate that the (101) plane is superior in producing oxygen vacancies than the (100) plane in rod-like defective ZnO samples. While the optimum intensity of the crystal ratio, (101)/(100), approaches 1, the separation efficiency of electrons–holes is much enhanced. Furthermore, it is found that the (101) plane has stronger spontaneous adsorption and higher dissociation activity of H2O, which is conducive to the spontaneous formation of oxygen vacancies and eventually enhances the separation efficiency of electrons–holes. The charge difference also shows that the crystal boundary junctions could cause uneven charge distribution, inducing lattice polarization and boosting the charge separation of defective ZnO, which is helpful for improving the photocatalytic activities. As a new proposed mechanism, the relationship between defect engineering and crystal surface could provide inspiration for the design of special nanomaterials for the environment purification and energy fields. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of CrystEngComm is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1039/c9ce01966a
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        Text: English
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        PageCount: 9
        StartPage: 2709
    Subjects:
      – SubjectFull: Induced polarization
        Type: general
      – SubjectFull: Crystal defects
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      – SubjectFull: Crystals
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      – SubjectFull: Crystal surfaces
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      – SubjectFull: Zinc oxide
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      – TitleFull: Defective crystal plane-oriented induced lattice polarization for the photocatalytic enhancement of ZnO.
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            – D: 28
              M: 04
              Text: 4/28/2020
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              Y: 2020
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