Few-layer WS2 decorating ZnIn2S4 with markedly promoted charge separation and photocatalytic H2 evolution activity

Xiong, Minghui; Chai, Bo; Yan, Juntao; Fan, Guozhi; Song, Guangsen

doi:10.1016/j.apsusc.2020.145965

Cited by 73 publications

(16 citation statements)

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“…3a ), two peaks at the binding energies of 1021.9 and 1045.0 eV, with a separation of 23.1 eV, are assigned to Zn 2p 3/2 and Zn 2p 1/2 of Zn 2+ , respectively. 32 The two symmetric peaks of In 3d located at the binding energies of 444.8 and 452.4 eV in the In 3d core-level spectrum of pure ZnIn 2 S 4 with a peak difference of 7.6 eV ( Fig. 3b ) are ascribed to In 3d 5/2 and In 3d 3/2 of In 3+ , respectively.…”

Section: Resultsmentioning

confidence: 91%

Prominent roles of Ni(OH)₂ deposited on ZnIn₂S₄ microspheres in efficient charge separation and photocatalytic H₂ evolution

et al. 2021

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Section: Resultsmentioning

confidence: 91%

Prominent roles of Ni(OH)₂ deposited on ZnIn₂S₄ microspheres in efficient charge separation and photocatalytic H₂ evolution

et al. 2021

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“…However, for water splitting, CO 2 reduction and degradation of pollutant high redox potential are needed and it became essential to integrate WS 2 with other semiconductors to meet the minimum energy (1.23 eV) requirement. Several heterojunctions using semiconductive WS 2 , such as WS 2 /TiO 2 , WS 2 /Zn 2 InS 4 , WS 2 /BiOBr, WS 2 /Bi 2 O 2 CO 3 , and CdS/WS 2 , , in various morphological forms have also been fabricated as they not only improve the visible absorption and the charge separation but also act as a cocatalyst . To garner the superior properties of such as 2D structure, high surface area, excellent electronic mobility, and suitable low band gap 2D/2D vdW heterostructures such as WS 2 /TiO 2 , MoS 2 /WS 2 , , WS 2 /CdS, Bi 2 WO 6 /WS 2– x , and WS 2 /ZnO have also been developed.…”

Section: Carbon Nitride–chalcogenide 2d/2d Vdw Structuresmentioning

confidence: 99%

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

et al. 2021

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The surging demand for energy and staggering pollutants in the environment have geared the scientific community to explore sustainable pathways that are economically feasible and environmentally compelling. In this context, harnessing solar energy using semiconductor materials to generate charge pairs to drive photoredox reactions has been envisioned as a futuristic approach. Numerous inorganic crystals with promising nanoregime properties investigated in the past decade have yet to demonstrate practical application due to limited photon absorption and sluggish charge separation kinetics. Two-dimensional semiconductors with tunable optical and electronic properties and quasi-resistance-free lateral charge transfer mechanisms have shown great promise in photocatalysis. Polymeric graphitic carbon nitride (g-C3N4) is among the most promising candidates due to fine-tuned band edges and the feasibility of optimizing the optical properties via materials genomics. Constructing a two-dimensional (2D)/2D van der Waals (vdW) heterojunction by allies of 2D carbon nitride sheets and other 2D semiconductors has demonstrated enhanced charge separation with improved visible photon absorption, and the performance is not restricted by the lattice matching of constituting materials. With the advent of new 2D semiconductors over the recent past, the 2D/2D heterojunction assemblies are gaining momentum to design high performance photocatalysts for numerous applications. This review aims to highlight recent advancements and key understanding in carbon nitride based 2D/2D heterojunctions and their applications in photocatalysis, including small molecules activation, conversion, and degradations. We conclude with a forward-looking perspective discussing the key challenges and opportunity areas for future research.

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“…The strategy of improving material performance through morphology control has been widely used in basic research and industrial production. − The morphology design of g-C 3 N 4 is more extensive, compared with bulk g-C 3 N 4 , − g-C 3 N 4 with 3D morphology (nanospheres, hollow tubes) has a larger specific surface area and active sites. Second, constructing a reasonable S-scheme heterojunction is also one of the efficient methods. , The S-scheme heterojunction consumes useless electrons and holes in the reaction system, improves the overall redox ability of the composite catalyst, shortens the electron transport path, and overcomes the shortcomings of type-II heterojunction. − Peng et al used a simple coprecipitation method to growth of CdS nanoparticles on MoO 3 nanosheets with a localized surface plasmon resonance (LSPR), and constructed an S-scheme heterojunction to efficiently enhance the catalyst activity.…”

Section: Introductionmentioning

confidence: 99%

Graphdiyne Based Ternary GD-CuI-NiTiO₃ S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution

Yan

Liu

Jin

2021

ACS Appl. Mater. Interfaces

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As the demand of fossil fuels continues to expand, hydrogen energy is considered a promising alternative energy. In this work, the NiTiO 3 −CuI-GD ternary system was successfully constructed based on morphology modulation and energy band structure design. First, the one-pot method was used to cleverly embed the cubes CuI in the stacked graphdiyne (GD) to prepare the hybrid CuI-GD, and CuI-GD was anchored on the surface of NiTiO 3 by simple physical stirring. The unique spatial arrangement of the composite catalyst was utilized to improve the hydrogen production activity under light. Second, to combine various characterization tools and energy band structures, we proposed an step-scheme (S-scheme) heterojunction photocatalytic reaction mechanism, among them, the tubular NiTiO 3 formed by the selfassembled of nanoparticles provided sufficient sites for the anchoring of CuI-GD, and the thin layer GD acted as an electron acceptor to capture a large number of electrons with the help of the conjugated carbon network; cubes CuI could consume holes in the reaction system; the loading of CuI-GD greatly improved the oxidation and reduction ability of the whole catalytic system. The S-scheme heterojunction accelerated the transfer of carriers and improved the separation efficiency. The experiment provides a new insight into the construction of an efficient and eco-friendly multicatalytic system.

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Few-layer WS2 decorating ZnIn2S4 with markedly promoted charge separation and photocatalytic H2 evolution activity

Cited by 73 publications

References 50 publications

Prominent roles of Ni(OH)₂ deposited on ZnIn₂S₄ microspheres in efficient charge separation and photocatalytic H₂ evolution

Prominent roles of Ni(OH)₂ deposited on ZnIn₂S₄ microspheres in efficient charge separation and photocatalytic H₂ evolution

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Graphdiyne Based Ternary GD-CuI-NiTiO₃ S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution

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Few-layer WS2 decorating ZnIn2S4 with markedly promoted charge separation and photocatalytic H2 evolution activity

Cited by 73 publications

References 50 publications

Prominent roles of Ni(OH)2 deposited on ZnIn2S4 microspheres in efficient charge separation and photocatalytic H2 evolution

Prominent roles of Ni(OH)2 deposited on ZnIn2S4 microspheres in efficient charge separation and photocatalytic H2 evolution

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Graphdiyne Based Ternary GD-CuI-NiTiO3 S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution

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Prominent roles of Ni(OH)₂ deposited on ZnIn₂S₄ microspheres in efficient charge separation and photocatalytic H₂ evolution

Prominent roles of Ni(OH)₂ deposited on ZnIn₂S₄ microspheres in efficient charge separation and photocatalytic H₂ evolution

Graphdiyne Based Ternary GD-CuI-NiTiO₃ S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution