纳米片
量子点
光催化
材料科学
石墨氮化碳
制氢
氮化碳
纳米复合材料
光电流
纳米技术
分解水
化学工程
氢
光电子学
催化作用
化学
有机化学
工程类
生物化学
作者
Bifu Luo,Yuanzhi Hong,Di Li,Zhenyuan Fang,Yaping Jian,Weidong Shi
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2018-09-10
卷期号:6 (11): 14332-14339
被引量:45
标识
DOI:10.1021/acssuschemeng.8b03006
摘要
Two-dimensional (2D) nanosheet photocatalysts with appropriate band structure have aroused a great deal of research interest owing to their unique structural and electronic properties. In this work, carbon nitride quantum dots (CNQDs) with up-conversion property were constructed on SnNb2O6 ultrathin nanosheets by a facial hydrothermal process. The as-prepared CNQDs/SnNb2O6 0D/2D nanocomposites exhibited an enhanced photocatalytic performance of H2 production under visible light irradiation (λ > 420 nm). The up-conversion behavior of CNQDs endow the CNQDs/SnNb2O6 nanocomposites with the ability of photocatalytic H2 production at wavelengths greater than 600 nm. Moreover, the introduced CNQDs could serve as effective electron collectors and promote the transfer of photogenerated charge carriers, which is elucidated by the transient photocurrent response and electrochemical impendence spectra. Finally, a plausible photocatalytic mechanism was proposed for CNQDs/SnNb2O6 nanocomposite toward the H2 production from water splitting.
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