论文成果
Construction of electron donor-acceptor Z-scheme heterojunction for boosting photocatalytic H-2 production
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关键字:G-C3N4; DEFECTS
摘要:Enhancing the solar energy conversion of metal-free graphitic carbon nitride (g-C3N4) based photocatalyst remains a great challenge. Herein, a novel Z-scheme heterojunction photocatalyst is constructed by in-situ anchoring Pt-6 NCs on carbon self-doping g-C3N4 (CCN/Pt-6 NCs) for boosting photocatalytic H-2 evolution activity. Remarkably, the optimized CCN/Pt-6 NCs photocatalyst exhibits high H2 evolution rate of 6.32 mmol.h(-1).g(-1) and 36.25 mmol.h(-1).g(-1), which is approximate to 150.5 and approximate to 412 times than that of pristine CN under visible light (lambda > 420 nm) and full solar spectrum irradiation, respectively, outperforming majority of the reported g-C3N4-based photocatalysts. Systematic characterizations have revealed that CCN with delocalized electrons and larger the work function is deemed to be a preferable electron-acceptor. Meanwhile, Pt-6 NCs with appropriate HOMO-LUMO level is regarded as an electron-donor. Theoretical and experimental works reveal that the favorable photocatalytic performance of CCN/Pt-6 NCs heterojunction is mainly attributed to the giant internal electric field induced donor-acceptor interaction, which achieves Z-scheme charge transfer mechanism. This work opens up new insights for rational fabrication of metal-free g-C3N4 based photocatalysts to boost the solar energy conversion.
卷号:635
期号:
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李桂村

教授 博士生导师 硕士生导师

教师拼音名称:liguicun

出生日期:1974-05-12

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所在单位:材料学院综合办公室

职务:材料科学与工程学院院长

学历:博士研究生

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性别:男

联系方式:guicunli@qust.edu.cn Tel:13730918070

学位:工学博士

毕业院校:中国海洋大学

所属院系:材料科学与工程学院

学科:材料物理与化学

曾获荣誉:

2016-01-01    山东省有突出贡献的中青年专家

2012-11-07    山东省第三届优秀研究生指导教师

2011-04-01    青岛拔尖人才

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