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Lee, Jae Sung
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Phase transition-induced band edge engineering of BiVO4 to split pure water under visible light

Author(s)
Jo, Won JunKang, Hyun JoonKong, Ki-JeongLee, Yun SeogPark, HunminLee, YounghyeBuonassisi, TonioGleason, Karen K.Lee, Jae Sung
Issued Date
2015-11
DOI
10.1073/pnas.1509674112
URI
https://scholarworks.unist.ac.kr/handle/201301/17887
Fulltext
http://www.pnas.org/content/112/45/13774
Citation
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.112, no.45, pp.13774 - 13778
Abstract
Through phase transition-induced band edge engineering by dual doping with In and Mo, a new greenish BiVO4 (Bi1-×In×V1-XMo×O4) is developed that has a larger band gap energy than the usual yellow scheelite monoclinic BiVO4 as well as a higher (more negative) conduction band than H+/H2 potential [0 VRHE (reversible hydrogen electrode) at pH 7]. Hence, it can extract H2 from pure water by visible light-driven overall water splitting without using any sacrificial reagents. The density functional theory calculation indicates that In3+/Mo6+ dual doping triggers partial phase transformation from pure monoclinic BiVO4 to a mixture of monoclinic BiVO4 and tetragonal BiVO4, which sequentially leads to unit cell volume growth, compressive lattice strain increase, conduction band edge uplift, and band gap widening
Publisher
NATL ACAD SCIENCES
ISSN
0027-8424
Keyword (Author)
photocatalysiswater splittingband edge engineeringbismuth vanadatedual doping
Keyword
AG-LOADED BIVO4PHOTOCATALYTIC PROPERTIESSOLID-SOLUTIONSOLAR PHOTOELECTROLYSISMONOCLINIC BIVO4OXIDATIONPHOTOANODESDEGRADATIONIRRADIATIONHYDROGEN

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