异质结
材料科学
光催化
密度泛函理论
光电子学
制氢
纳米技术
化学工程
氢
催化作用
生物化学
工程类
计算化学
有机化学
化学
作者
Boyuan Wu,Tiankai Sun,Ning Liu,Lerong Lu,Ruizhe Zhang,Wei Shi,Peng Cheng
标识
DOI:10.1021/acsami.2c04729
摘要
Fabricating heterojunction photocatalysts for H2 production is promising for the development of clean energy. For boosting the photocatalytic activity, modulating the heterojunction interface can facilitate the electron-hole separation and solar energy utilization, but it is highly challenging in synthesis. In this work, by facilely exfoliating the bulk C3N5, ultrathin C3N5 nanosheets (N-CN) with large surface area, improved light absorption, and efficient charge transport were synthesized and further applied to the construction of NH2-UiO-66/N-CN heterojunctions. The optimized NH2-UiO-66/N-CN-2 exhibits high hydrogen evolution rate and cycling stability with Pt as the cocatalyst. Combined with the experimental results, the density functional theory calculation reveals that the high photocatalytic performance is attributed to the promoted photogenerated carrier transfer by the formation of well-contacted and stable Z-scheme heterojunction interface. This contribution renders an insight into the modulation of the heterojunction interface for enhancing the activity of MOF-based photocatalysts.
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