Enhanced photocatalytic properties in BiOBr nanosheets with dominantly exposed (102) facets

Haijun Zhang; Yuxiao Yang; Zhen Zhou; Yaping Zhao; Lu Liu

doi:10.1021/jp5035079

Enhanced photocatalytic properties in BiOBr nanosheets with dominantly exposed (102) facets

Haijun Zhang
, Yuxiao Yang
, Zhen Zhou^*
, Yaping Zhao
, Lu Liu

^*Corresponding author for this work

School of Ecology and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

173 Scopus citations

Abstract

Through first-principles computations, we compared the photocatalytic properties of (102) and (001) facets within BiOBr. Due to the surface states, the (102) facets of BiOBr have lower conduction band minimum and higher valence band maximum, compared with the (001) facets. Therefore, the (102) facets have more efficient electron injection, higher redox potential of photoinduced hole, and smaller band gap, which may result in better photocatalytic performances. Also, we prepared BiOBr-102 and BiOBr-001 samples with dominantly exposed (102) and (001) facets, respectively, and found red-shift absorption, and enhanced photodegradation rate of Rhodamine B in BiOBr-102, which agree well with the computations. Therefore, BiOBr samples with dominantly exposed (102) facets are superior in photocatalysis, and the results demonstrate the critical role of facet orientation in photocatalyst design.

Original language	English
Pages (from-to)	14662-14669
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	26
DOIs	https://doi.org/10.1021/jp5035079
State	Published - 3 Jul 2014

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title = "Enhanced photocatalytic properties in BiOBr nanosheets with dominantly exposed (102) facets",

abstract = "Through first-principles computations, we compared the photocatalytic properties of (102) and (001) facets within BiOBr. Due to the surface states, the (102) facets of BiOBr have lower conduction band minimum and higher valence band maximum, compared with the (001) facets. Therefore, the (102) facets have more efficient electron injection, higher redox potential of photoinduced hole, and smaller band gap, which may result in better photocatalytic performances. Also, we prepared BiOBr-102 and BiOBr-001 samples with dominantly exposed (102) and (001) facets, respectively, and found red-shift absorption, and enhanced photodegradation rate of Rhodamine B in BiOBr-102, which agree well with the computations. Therefore, BiOBr samples with dominantly exposed (102) facets are superior in photocatalysis, and the results demonstrate the critical role of facet orientation in photocatalyst design.",

author = "Haijun Zhang and Yuxiao Yang and Zhen Zhou and Yaping Zhao and Lu Liu",

year = "2014",

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day = "3",

doi = "10.1021/jp5035079",

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volume = "118",

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journal = "Journal of Physical Chemistry C",

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publisher = "American Chemical Society",

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}

TY - JOUR

T1 - Enhanced photocatalytic properties in BiOBr nanosheets with dominantly exposed (102) facets

AU - Zhang, Haijun

AU - Yang, Yuxiao

AU - Zhou, Zhen

AU - Zhao, Yaping

AU - Liu, Lu

PY - 2014/7/3

Y1 - 2014/7/3

N2 - Through first-principles computations, we compared the photocatalytic properties of (102) and (001) facets within BiOBr. Due to the surface states, the (102) facets of BiOBr have lower conduction band minimum and higher valence band maximum, compared with the (001) facets. Therefore, the (102) facets have more efficient electron injection, higher redox potential of photoinduced hole, and smaller band gap, which may result in better photocatalytic performances. Also, we prepared BiOBr-102 and BiOBr-001 samples with dominantly exposed (102) and (001) facets, respectively, and found red-shift absorption, and enhanced photodegradation rate of Rhodamine B in BiOBr-102, which agree well with the computations. Therefore, BiOBr samples with dominantly exposed (102) facets are superior in photocatalysis, and the results demonstrate the critical role of facet orientation in photocatalyst design.

AB - Through first-principles computations, we compared the photocatalytic properties of (102) and (001) facets within BiOBr. Due to the surface states, the (102) facets of BiOBr have lower conduction band minimum and higher valence band maximum, compared with the (001) facets. Therefore, the (102) facets have more efficient electron injection, higher redox potential of photoinduced hole, and smaller band gap, which may result in better photocatalytic performances. Also, we prepared BiOBr-102 and BiOBr-001 samples with dominantly exposed (102) and (001) facets, respectively, and found red-shift absorption, and enhanced photodegradation rate of Rhodamine B in BiOBr-102, which agree well with the computations. Therefore, BiOBr samples with dominantly exposed (102) facets are superior in photocatalysis, and the results demonstrate the critical role of facet orientation in photocatalyst design.

UR - https://www.scopus.com/pages/publications/84903793707

U2 - 10.1021/jp5035079

DO - 10.1021/jp5035079

M3 - 文章

AN - SCOPUS:84903793707

SN - 1932-7447

VL - 118

SP - 14662

EP - 14669

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 26

ER -

Enhanced photocatalytic properties in BiOBr nanosheets with dominantly exposed (102) facets

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