Journal ArticleDOI
Constructing van der Waals Heterogeneous Photocatalysts Based on Atomically Thin Carbon Nitride Sheets and Graphdiyne for Highly Efficient Photocatalytic Conversion of CO2 into CO.
Yong Wang,Zhang Yu,Yong-Mei Wang,Chengxin Zeng,Mei Sun,Dingyi Yang,Ke Cao,Hongzhe Pan,Yizhang Wu,Hong Liu,Hong Liu,Rusen Yang +11 more
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TLDR
In this article, an atomically thin 2D/2D van der Waals heterostructures of metal-free graphdiyne (GDY)/CNs are fabricated through a simple electrostatic self-assembly method.Abstract:
Atomically thin two-dimensional (2D) carbon nitride sheets (CNs) are attracting attention in the field of photocatalytic CO2 reduction. Because of the rapid recombination of photogenerated electron-hole pairs and limited more active sites, the photocatalytic efficiency of CNs cannot meet the actual requirements. Here, atomically thin 2D/2D van der Waals heterostructures of metal-free graphdiyne (GDY)/CNs are fabricated through a simple electrostatic self-assembly method. Experimental characterizations along with first-principles calculations show that the introduction of GDY in CNs promoted the transport of photogenerated carriers in the melon chain, thus suppressing the recombination of photogenerated electron-hole pairs. Both in situ FTIR measurements and DFT calculation confirm that the introduced GDY served as the CO2 adsorption site and enhanced the CO2 adsorption capacity of the CNs/GDY heterostructure. Thanks to the 2D/2D van der Waals heterojunction, the optimized CNs/GDY enhances significantly the CO generation rate up to 95.8 μmol g-1 that is 19.2-fold higher than that of CNs. This work provides a viable approach for the design of metal-free van der Waals heterostructure-based photocatalysts with high catalytic activity.read more
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2D graphdiyne: an emerging carbon material
TL;DR: As a new member of carbon allotropes, graphdiyne (GDY) has the characteristics of being one-atom-thick with two-dimensional layers comprising sp and sp2 hybridized carbon atoms and represents a trend in the development of carbon materials as mentioned in this paper .
Journal ArticleDOI
Synergies of Adjacent Sites in Atomically Dispersed Ruthenium toward Achieving Stable Hydrogen Evolution.
TL;DR: In this paper, an ionic diffusion and coordination (IDC) strategy was used to fabricate atomically dispersed metal clusters in polymeric carbon nitride (PCN) for durable photocatalytic reactions owing to the thermodynamic stability limitation.
Journal ArticleDOI
In-situ annealed “M-scheme” MXene-based photocatalyst for enhanced photoelectric performance and highly selective CO2 photoreduction
Yizhang Wu,Wei Xu,Wenchao Tang,Zhaokun Wang,Yong Wang,Zhengxing Lv,Zhang Yu,Wei Zhong,Hong-Ling Cai,Rusen Yang,X. S. Wu +10 more
TL;DR: In this article, a dual heterojunction is constructed by annealing precursor CeO2/Ti3C2 to form anatase TiO2 in situ, which not only plays the role of a platform to receive transferred electrons, but also resembles the behavior of precious metals to assist in the decomposition of H2 molecules to H+.
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Photothermal functional material and structure for photothermal catalytic CO2 reduction: Recent advance, application and prospect
TL;DR: In this article , the authors reviewed the latest research progress of emerging photothermal functional materials (GDY, MXene, BP) in photothermal catalytic CO2 reduction from the regulation mechanism of sunlight absorption, photothermal conversion, active site exposure and carrier migration.
Journal ArticleDOI
Promoted photocarriers separation by straining in 2D/2D van der Waals heterostructures for high-efficiency visible-light photocatalysis
Yong Wang,Cheng Hui Zeng,Yun Zhang,Ran Su,Ding-Shen Yang,Zhao-Xu Wang,Yizhang Wu,Hongzhe Pan,Weidong Zhu,Wen Hu,Hong Zhou Liu,Rusen Yang +11 more
TL;DR: In this article , the authors show that the electric field caused by straining facilitates the separation of photogenerated electron-hole pairs and improves the transport of photoglase carriers in 2D/2D vdWHs.
References
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