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    张耀斌

    • 教授   博士生导师   硕士生导师
    • 主要任职:无
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 在职信息:在职
    • 所在单位:环境学院
    • 学科:环境科学与工程 环境工程 环境科学
    • 办公地点:环境楼B301
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    Carbon nitride with electron storage property: Enhanced exciton dissociation for high-efficient photocatalysis

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    论文类型:期刊论文

    第一作者:Zeng, Zhenxing

    通讯作者:Quan, X (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Minist Educ, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China.

    合写作者:Quan, Xie,Yu, Hongtao,Chen, Shuo,Zhang, Yaobin,Zhao, Huimin,Zhang, Shushen

    发表时间:2018-11-15

    发表刊物:APPLIED CATALYSIS B-ENVIRONMENTAL

    收录刊物:SCIE、Scopus

    卷号:236

    页面范围:99-106

    ISSN号:0926-3373

    关键字:Carbon nitride; Electron storage; Excitonic effect; Exciton dissociation; Artificial photosynthesis

    摘要:Excitonic effect, originated from the strong Coulomb attraction between electron and hole, plays an important role in the photocatalytic process of polymeric materials but has been long ignored. In view point of hot-carriers generation, the dissociation of Frenkel excitons is proposed as an effective way to improve the photocatalytic performance of polymeric photocatalysts. Herein, by taking graphitic carbon nitride (g-C3N4) as an example, we verify that endowing g-C3N4 with electron storage ability can facilitate exciton dissociation by extracting electrons from bound electron-hole couples around the electron stotage sites, therefore enhancing the hot-carriers harvest and suppressing the charge recombination. Benefiting from these advantages, the as-prepared material demonstrates excellent photocatalytic performance for both H-2 evolution and H2O2 generation. As a result, the apparent quantum yield (AQY) for H-2 evolution at 420 nm reaches 55%, which is much higher than most of the reported polymeric materials. The study described here offers a new way for designing advanced polymeric photocatalysts toward high performance solar energy conversion via excitonic engineering.