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
电子邮箱:
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
办公地点:材料楼225房间
性别:男
联系方式:guicunli@qust.edu.cn Tel:13730918070
学位:工学博士
职称:教授
毕业院校:中国海洋大学
学科:材料物理与化学
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
最后更新时间:..
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:
是否译文:否