Temperature‐Mediated Selective Growth of MoS2/WS2 and WS2/MoS2 Vertical Stacks on Au Foils for Direct Photocatalytic Applications

Shi, Jianping; Tong, Rui; Zhou, Xinyu; Gong, Yue; Zhang, Zhepeng; Ji, Qingqing; Zhang, Yu; Fang, Qiyi; Gu, Lin; Wang, Xina; Liu, Zhongfan; Zhang, Yanfeng

doi:10.1002/adma.201603174

Cited by 200 publications

(144 citation statements)

References 43 publications

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“…From the material design perspective for an efficient visible-light-driven sensitized heterojunctional photocatalyst, the primary concern is that the hybrid narrow band gaps (1.1–1.7 eV) can closely match the solar spectrum [18]. In fact, the typical 2D layered semiconductors, such as MoS 2 or g-C 3 N 4 , have received significant attention to explore potential photocatalysis applications, which lead to TMD nanosheet which is often utilized as a supporter to establish the heterostructured composite photocatalysts via different energy band hybrid strategies [19, 20]. For instance, the hierarchical MoS 2 /Bi 2 MoO 6 composites exhibited an efficient performance for photocatalytic oxidation of rhodamine B under visible-light irradiation [21].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Heterostructured WS2/Bi2MoO6 as High-Performance Visible-Light-Driven Photocatalysts

Gao¹,

Chenhui²,

Wang³

et al. 2017

Nanoscale Res Lett

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In this paper, novel WS2/Bi2MoO6 heterostructured photocatalysts were successfully fabricated via a facile solvothermal growth method using pre-exfoliated layered WS2 nanoslices as a substrate. The structure, morphology, and optical properties of the as-prepared WS2/Bi2MoO6 samples were characterized by XRD, XPS, SEM, TEM (HRTEM), and UV-vis diffuse reflectance spectra (DRS). Results confirmed the existence of an excellent nanojunction interface between layered WS2 nanoslices and Bi2MoO6 nanoflakes. Under visible light (>420 nm), the WS2/Bi2MoO6 composites exhibit significantly enhanced photocatalytic activity compared with pure Bi2MoO6 toward the decomposition of rhodamine B (RhB). Meanwhile, the active species trapping experiments indicated that holes (h+) were the main active species during the photocatalytic reaction. The enhanced photocatalytic performance can be ascribed to the effective light harvesting, fast photogenerated electron–hole pairs separation, and excellent charge carrier transport of the WS2/Bi2MoO6 heterostructures. Moreover, the prepared WS2/Bi2MoO6 composites also show good structural and activity stability in repeatability experiments.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Heterostructured WS2/Bi2MoO6 as High-Performance Visible-Light-Driven Photocatalysts

Gao¹,

Chenhui²,

Wang³

et al. 2017

Nanoscale Res Lett

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“…Since the discovery of graphene, 2D materials, such as tungsten disulfide (WS 2 ) and other transition metal dichalcogenides (TMDCs), have drawn a great deal of interest due to their attractive physical and electronic properties [1][2][3]. It is reported that the hydrogen binding energy of MoS 2 is close to that of Pt-group metals, thus hinting at potential applications of other TMDCs in photocatalytic HER [4][5][6][7][8][9]. Both computational and experimental results have confirmed that the photocatalytic activities of XS 2 (X could be other transition metals, such as W) mainly stem from the edges rather than the basal planes [10,11].…”

Section: Introductionmentioning

confidence: 99%

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Zhou

Yan

et al. 2017

Catalysts

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Two-dimensional transition metal dichalcogenides, such as tungsten disulfide (WS 2 ), have been actively studied as suitable candidates for photocatalysts due to their unique structural and electronic properties. The presence of active sites at the edges and the higher specific surface area of these materials are crucial to the photocatalytic activity of the hydrogen evolution reaction. Here, WS 2 quantum dots (QDs) have been successfully synthesized by using a combination of grinding and sonication techniques. The morphology of the QDs was observed, using transmission electron microscopy and an atomic force microscope, to have uniform sizes of less than 5 nm. Photoelectrochemical (PEC) measurements show that the current density of WS 2 QDs under illumination is almost two times higher than that of pristine WS 2 . Furthermore, these high-quality WS 2 QDs may have various applications in optoelectronics, solar cells, and biomedicine.

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“…The former two growth systems can be readily used for the onsite STM/STS characterizations of the atomic‐scale structures, defects, and the related electronic properties . The direct electrocatalytic and photocatalytic measurements can also be conducted on Au foils or glass carbon electrode materials, thus providing straight evidences for their applications in related fields.…”

Section: Preparation Methods Of 2d Mtmdcsmentioning

confidence: 99%

2D Metallic Transitional Metal Dichalcogenides for Electrochemical Hydrogen Evolution

Huan

Shi

Zhao³

et al. 2019

Energy Tech

Self Cite

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2D metallic transition metal dichalcogenides (MTMDCs) have become the focus of intense research in many fields due to their novel physical and chemical properties (e.g., charge‐density wave order, unconventional superconductivity, and magnetism), as well as their extraordinary performance in advanced nanoelectronics and energy‐related fields. Herein, the preparation methods of 2D MTMDCs, such as chemical exfoliation via alkali metal intercalation, colloidal synthesis, and chemical vapor deposition (CVD), and their applications in electrocatalytic hydrogen evolution reactions (HERs) are comprehensively discussed. In particular, the first part focuses on various synthetic routes of 2D MTMDC nanosheets with different thicknesses and domain sizes, as well as the crucial factors in the corresponding synthetic process. In addition, the different growth mechanisms via the CVD processes caused by common insulating substrates (e.g., SiO2/Si, mica), unique conducing substrates (e.g., Au foil), and novel porous substrates (e.g., nanoporous gold) are also compared. In the second part, the excellent electrocatalytic performances of 2D MTMDC nanosheets in HER are also demonstrated by combining density functional theory (DFT) calculations and experimental results. Finally, challenges regarding the preparation of MTMDC nanosheets and probable routes for further improving the HER performance are also highlighted, and the future research directions are also proposed.

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Temperature‐Mediated Selective Growth of MoS₂/WS₂ and WS₂/MoS₂ Vertical Stacks on Au Foils for Direct Photocatalytic Applications

Cited by 200 publications

References 43 publications

Facile Synthesis of Heterostructured WS2/Bi2MoO6 as High-Performance Visible-Light-Driven Photocatalysts

Facile Synthesis of Heterostructured WS2/Bi2MoO6 as High-Performance Visible-Light-Driven Photocatalysts

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

2D Metallic Transitional Metal Dichalcogenides for Electrochemical Hydrogen Evolution

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