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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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

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Title
Phase transition-induced band edge engineering of BiVO4 to split pure water under visible light
Author
Jo, Won JunKang, Hyun JoonKong, Ki-JeongLee, Yun SeogPark, HunminLee, YounghyeBuonassisi, TonioGleason, Karen K.Lee, Jae Sung
Issue Date
2015-11
Publisher
NATL ACAD SCIENCES
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
URI
https://scholarworks.unist.ac.kr/handle/201301/17887
URL
http://www.pnas.org/content/112/45/13774
DOI
10.1073/pnas.1509674112
ISSN
0027-8424
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