Edge-rich MoS2 grown on edge-oriented three-dimensional graphene glass for high-performance hydrogen evolution

Li, Xuanhua; Guo, Shaohui; Li, Wei; Ren, Xiangling; Su, Jie; Song, Qiang; Sobrido, Ana Jorge; Wei, Bingqing

doi:10.1016/j.nanoen.2018.12.044

Cited by 101 publications

(57 citation statements)

References 78 publications

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“…A rational design can lead to a photocatalyst that exhibits efficient light absorption, facilitates charge separation and transport, and accelerates surface reactions. [ 17–21 ] Morphology design and composition control are the two main strategies employed for catalyst design. So far, a favorable library of morphological structures has been devised in semiconductor photocatalysts, containing 0D quantum dots, [ 22,23 ] 1D nanowires/nanorods, [ 8,24,25 ] 2D nanosheets, [ 1,12,13 ] 3D hollow nanostructures, [ 21,26 ] and heterostructures.…”

Section: Introductionmentioning

confidence: 99%

Heat Diffusion‐Induced Gradient Energy Level in Multishell Bisulfides for Highly Efficient Photocatalytic Hydrogen Production

Wang

Guo

et al. 2020

Advanced Energy Materials

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Insufficient light absorption and low carrier separation/transfer efficiency constitute two key issues that hinder the development of efficient photocatalytic hydrogen production. Here, multishell ZnS/CoS2 bisulfide microspheres with gradient distribution of Zn based on the heat diffusion theory are designed. The Zn distribution can be adjusted by regulating the heating rate and manipulating the diffusion coefficients of the different elements conforming the multishell photocatalyst. Because of the unique structure, a gradient energy level is created from the core to the exterior of the multishell microspheres, which effectively facilitates the exciton separation and electron transfer. In addition, stronger light absorption and larger specific surface area have been achieved in the multishell ZnS/CoS2 photocatalysts. As a result, the multishell ZnS/CoS2 microspheres with gradient distribution of Zn exhibit a remarkable hydrogen production rate of 8001 µmol g−1 h−1, which is 3.5 times higher than that of the normal multishell ZnS/CoS2 particles with well‐distributed Zn and 11.3 times higher than that of the mixed nonshell ZnS and CoS2 particles. This work demonstrates for the first time that controlling the diffusion rate of the different elements in the semiconductor is an effective route to simultaneously regulate morphology and structure to design highly efficient photocatalysts.

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Section: Introductionmentioning

confidence: 99%

Heat Diffusion‐Induced Gradient Energy Level in Multishell Bisulfides for Highly Efficient Photocatalytic Hydrogen Production

Wang

Guo

et al. 2020

Advanced Energy Materials

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“…As regards the charge transport, the edge-rich MoS 2 grown on the edgeoriented 3D graphene glass can achieve an optimized charge transport along the 2D vector plane from the MoS 2 layers to the graphene. Consequently, such hybrid nanostructures exhibited excellent performance as an effective photocatalyst for hydrogen generation from photocatalytic water splitting [4]. These and many other studies showed that edges play an important role for the deposition of thin MoS 2 layers and structures.…”

Section: Introductionmentioning

confidence: 68%

Nanocone structures with limited interspace grown by MOVPE

Novák¹,

Eliáš²,

Hasenöhrl³

et al. 2020

physics

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Reduction and limitation of free spaces between the gallium phosphide nanocones was studied. A set of nanocone samples was grown by metal organic vapour phase epitaxy (MOVPE) in the temperature range between 610 and 690°C. Our results showed that by an appropriate combination of a high density of gold seeds and an optimized growth temperature it was possible to obtain a nanostructured surface with very limited free spaces between the nanocones. A combination of lateral and vertical growth rates regulated by the selection of growth temperature played a very important role in the nanocone hexagonal base enlargement, which helped to minimize spaces between the cones. The limitation of free space between the nanocones increased a probability of edge creation that is very helpful for the successful growth of 2D materials.

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“…The calculated J SC values were 14.24, 15.38, 15.84, 16.45 mA cm −2 by the integration of the EQE spectra, which were in good agreement with the J SC values attained from the J – V measurements. To further investigate the charge extraction efficiencies of alcohol‐annealed devices, internal quantum efficiencies (IQEs) were derived from the EQE and absorption data (Figure a,b, respectively), and the results are presented in Figure c. The IQE spectra of the devices also increased in the order of the control, iso‐annealed, eth‐annealed, and meth‐annealed Sb 2 S 3 devices, indicating better charge extraction in the alcohol‐annealed devices.…”

Section: Resultsmentioning

confidence: 99%

Alcohol Vapor Post‐Annealing for Highly Efficient Sb₂S₃ Planar Heterojunction Solar Cells

et al. 2019

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Solution‐processed Sb2S3 planar heterojunction solar cells have shown great progress in power conversion efficiency (PCE) in recent years. However, a conventional solution process yields Sb2S3 films with a small grain size. Herein, an alcohol vapor post‐annealing strategy is reported that uses alcohol vapors to facilitate grain growth of Sb2S3 films during annealing, achieving films with a larger grain size and better crystallinity. A series of alcohols with different polarities are used for the vapor post‐annealing. Methanol with the highest polarity provides films with the largest grain size. As a result, the Sb2S3 films prepared via vapor post‐annealing show enhanced light absorption, longer carrier lifetime, and less carrier recombination, which are verified by photoluminescence, transient photovoltage, suns‐short‐circuit photocurrent density, and suns‐open‐circuit voltage measurements. The Sb2S3 solar cells post‐annealed with methanol vapor exhibit a PCE of 5.27%, showing a drastic improvement of 31% compared with the non‐treated devices. The alcohol vapor post‐annealing approach presents a new avenue toward controlling the morphology and crystallinity of solution‐processed Sb2S3 films and achieving efficient Sb2S3 solar cells.

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Edge-rich MoS2 grown on edge-oriented three-dimensional graphene glass for high-performance hydrogen evolution

Cited by 101 publications

References 78 publications

Heat Diffusion‐Induced Gradient Energy Level in Multishell Bisulfides for Highly Efficient Photocatalytic Hydrogen Production

Heat Diffusion‐Induced Gradient Energy Level in Multishell Bisulfides for Highly Efficient Photocatalytic Hydrogen Production

Nanocone structures with limited interspace grown by MOVPE

Alcohol Vapor Post‐Annealing for Highly Efficient Sb₂S₃ Planar Heterojunction Solar Cells

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Edge-rich MoS2 grown on edge-oriented three-dimensional graphene glass for high-performance hydrogen evolution

Cited by 101 publications

References 78 publications

Heat Diffusion‐Induced Gradient Energy Level in Multishell Bisulfides for Highly Efficient Photocatalytic Hydrogen Production

Heat Diffusion‐Induced Gradient Energy Level in Multishell Bisulfides for Highly Efficient Photocatalytic Hydrogen Production

Nanocone structures with limited interspace grown by MOVPE

Alcohol Vapor Post‐Annealing for Highly Efficient Sb2S3 Planar Heterojunction Solar Cells

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Product

Resources

About

Alcohol Vapor Post‐Annealing for Highly Efficient Sb₂S₃ Planar Heterojunction Solar Cells