Probing supramolecular assembly and charge carrier dynamics toward enhanced photocatalytic hydrogen evolution in 2D graphitic carbon nitride nanosheets
Probing supramolecular assembly and charge carrier dynamics toward enhanced photocatalytic hydrogen evolution in 2D graphitic carbon nitride nanosheets
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探索超分子组装和载流子动力学,以增强二维石墨氮化碳纳米片中的光催化析氢
DOI:
10.1016/j.apcatb.2019.117867
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发表时间:
2019-11
期刊:
影响因子:
--
通讯作者:
Yang Xiaofei
中科院分区:
文献类型:
--
作者:
Zhao Chengxiao;Chen Zupeng;Xu Jingsan;Liu Qinqin;Xu Hui;Tang Hua;Li Guisheng;Jiang Yan;Qu Feiqiang;Lin Zixia;Yang Xiaofei
Two-dimensional graphitic carbon nitride (2D g-C3N4) nanostructures have been the focus of substantial research interest recently owing to their promising photoactive properties for use in solar-to-fuel conversion. However, the synthesis of 2D g-C3N4nanomaterials remains a significant challenge. Here we successfully synthesized 2D g-C3N4nanosheets via a supramolecular chemistry approach. 2D g-C3N4nanostructures not only enhance the visible light-harvesting property but also provide more catalytic sites for improved hydrogen evolution reaction (HER). More importantly, we describe experimental findings concerning the dynamics of charge and energy transfer by using ultrafast spectroscopy in combination with in-situ electron spin resonance (ESR) characterization. The mechanistic investigation reveals that the introduction of a benzene-substituted melamine motif can remarkably accelerate the electron-hole separation and suppress the recombination of photogenerated charge carriers. The carrier separation dynamics is expected to be tailored by engineering the surface and morphology of g-C3N4, which favors enhanced solar photocatalytic HER efficiency.
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影响因子:
22.1
作者:
Mo, Zhao;Xu, Hui;Li, Huaming
通讯作者:
Li, Huaming
影响因子:
16.6
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22.1
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通讯作者:
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