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

Jo Won Jun; Kang Hyun Joon; Kong Ki-JeongLee Yun SeogPark HunminLee YounghyeBuonassisi TonioGleason Karen K.Lee Jae Sung

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

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

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摘要

Through phase transition-induced band edge engineering by dual doping with In and Mo, a new greenish BiVO4 (Bi1-XInXV1-XMoXO4) 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+/H-2 potential 0 V-RHE (reversible hydrogen electrode) at pH 7. Hence, it can extract H-2 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.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2015年第45期|13774-13778|共5页
作者
Jo Won Jun; Kang Hyun Joon; Kong Ki-JeongLee Yun SeogPark HunminLee YounghyeBuonassisi TonioGleason Karen K.Lee Jae Sung;
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作者单位

MIT, Dept Chem Engn, Cambridge, MA 02139 USA;

Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 790784, South Korea;

Korea Inst Chem Technol, Daejeon 305343, South KoreaMIT, Dept Mech Engn, Cambridge, MA 02139 USAUlsan Natl Inst Sci & Technol, Sch Energy & Chem Engn, Ulsan 689798, South Korea;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
photocatalysis; water splitting; band edge engineering; bismuth vanadate; dual doping;

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

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