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• W2765652562 abstract "Single atoms of platinum (Pt), palladium (Pd) or gold (Au) trapped by two-dimensional graphitic carbon nitride (g-C3N4) exhibit superior photocatalytic performance. However, the underlying mechanism of single-atom noble metal/g-C3N4 photocatalytic system is still unclear. Herein, the structural, electronic and optical properties of single-atom Pt, Pd and Au loaded on bilayer g-C3N4 (BL-g-C3N4) substrate were investigated by density functional theory (DFT) simulations. The results indicate that single-atom Pt/Pd/Au loading can significantly narrow the band gap of g-C3N4 and thus increase its light absorption in the visible-light region. Rather than being adsorbed on the surface, Pt and Pd atoms tend to be embedded into g-C3N4 interlayer and act as bridges to facilitate the interlayer charge carrier transfer due to the effects of conduction band offset. In particular, an internal electric field is generated in Pt/BL-g-C3N4, which is further beneficial for separating charge carrier of photoexcited g-C3N4. By contrast, Au can only be adsorbed on the g-C3N4 surface (in the six-fold cavity) and deliver a limited amount of charge carrier excited in the N-conjugated aromatic pore of g-C3N4 surface. Our finding is conducive to understanding the interactive relationship between single-atom noble metal co-catalysts and g-C3N4 and to the design of high-efficiency photocatalyst." @default.
• W2765652562 created "2017-11-10" @default.
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• W2765652562 date "2018-03-01" @default.
• W2765652562 modified "2023-10-17" @default.
• W2765652562 title "Mechanistic insight into the enhanced photocatalytic activity of single-atom Pt, Pd or Au-embedded g-C 3 N 4" @default.
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• W2765652562 doi "https://doi.org/10.1016/j.apsusc.2017.10.120" @default.
• W2765652562 hasPublicationYear "2018" @default.
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