ZnO/WSe<sub>2</sub> vdW heterostructure for photocatalytic water splitting

Hu, Fafei; Tao, Lu‐Qi; Chen, Xianping; Li, Xiandong

doi:10.1039/c9tc00573k

Cited by 105 publications

(42 citation statements)

References 60 publications

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“…The efficient charge transfer from ZnO to WSe 2 led to the enhance of photocatalytic efficiency. [21] Sun et al designed a three-dimensional porous ZnOÀ SnS heterojunction under mild conditions. The wide visible-light harvesting of SnS, and high redox potential large surface area of ZnO promoted the transfer and separation rate of carriers.…”

Section: Introductionmentioning

confidence: 99%

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Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Zhao

Zhou

et al. 2020

ChemPlusChem

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Heterojunction nanocomposites comprising Nickel-doped porous ZnO nanosheets decorated with CuInS 2 nanoparticles (CuInS 2 /NiÀ ZnO) were prepared through a facile two-step process. Compared with pure ZnO nanosheets, the Ni doping modifies the energy band structure and narrows the bandgap from 3.1 eV to 2.4 eV, thus enhancing the absorption of visible light. The production of high-quality CuInS 2 /NiÀ ZnO nanosheets with well-matched band energy alignment facilitates effective charge transportation and separation. Benefiting from these favorable properties, the as-prepared CuInS 2 /NiÀ ZnO hetero-junction nanosheets exhibit higher photocatalytic activity for reduction of Cr (VI) than CuInS 2 and NiÀ ZnO in the presence of visible light. The CuInS 2 /NiÀ ZnO-5 (2 % Ni) composite shows the best photocatalytic activity, which is 7.2 and 5.4 times higher than that of the NiÀ ZnO and CuInS 2 . 98 % of Cr (VI) (50 mg/L) can be reduced within 25 min. Moreover, the activity and structure of the CuInS 2 /NiÀ ZnO catalyst are maintained after five cycles. Combining theoretical calculations and experimental results, a possible photocatalysis mechanism of the CuInS 2 / NiÀ ZnO heterojunction nanocomposites is proposed.[a] S.

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Section: Introductionmentioning

confidence: 99%

“…studied optical and electronic properties of ZnO/WSe 2 heterobilayers and discovered that the direct band gap was spatially separated for the ZnO and WSe 2 heterostructure with type‐II alignment of electrons and holes. The efficient charge transfer from ZnO to WSe 2 led to the enhance of photocatalytic efficiency . Sun et al.…”

Section: Introductionmentioning

confidence: 99%

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Zhao

Zhou

et al. 2020

ChemPlusChem

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“…A series of heterostructures, such as C 2 N/InTe, AlN/WS 2 , MoTe 2 /CrS 2 , GaN/Mg(OH) 2 , MoS 2 /CdS, CdS/C 2 N, CdS/ZnSe, BlueP/Mg(OH) 2 , BiNbO 4 /ZnWO 4 , C 60 /g‐C 3 N 4 , SiC/MoS 2 , and GaN/BlueP, exhibit enhanced photocatalytic performance. Especially, some ZnO monolayer‐based heterostructures are ZnO/MoS 2 , ZnO/WS 2 , ZnO/WSe 2 , ZnO/AlN, and N‐ZnO/g‐C 3 N 4 . Shen and coworkers have applied vertical strain to modulate the photocatalytic activity of ZnO/GeC heterostructure, and our previous work reports that biaxial strain can effectively tune the photocatalytic performance for ZnO/GeC heterostructure.…”

Section: Introductionmentioning

confidence: 99%

Rotation Tunable Photocatalytic Properties of ZnO/GaN Heterostructures

Wang

Tang

Geng

et al. 2019

Physica Status Solidi (b)

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Using hybrid density functional calculations, the influence of rotation angles on the photocatalytic performance of 2D ZnO/GaN heterostructures is explored. The results show that the bandgaps and band alignments for ZnO/GaN heterostructures can be tuned by rotation angles. Rotated ZnO/GaN heterostructures are favorable for visible light absorption. Band alignments of different rotated ZnO/GaN heterostructures are severally thermodynamically favorable for spontaneous generation of hydrogen and oxygen with the pH scope of 0–14, 3–14, 2–14, 1–14, 1–14, and 4–14. In addition, the formed built‐in electric field across ZnO/GaN heterostructure interface promotes photogenerated carrier migration and inhibits photogenerated carrier recombination. These factors make rotated ZnO/GaN heterostructures promising for visible light water splitting. The findings pay a new way to design 2D heterostructures used for photocatalytic water splitting.

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“…[ 22 ] As exhibited in Figure a,b the projected band structure of the XS 2 /BSe heterostructures is the sum of that of XS 2 and BSe with unchanged band shape and bandgap, suggesting further the existence of vdW interactions in the XS 2 /BSe heterostructures as other TMDs‐based vdW heterostructures. [ 40 ] Additionally, the CBM, and VBM of the XS 2 /BSe heterostructures are contributed by the XS 2 and BSe monolayers, respectively. Both the CBM and the VBM of the XS 2 monolayer are lower than that of the BSe monolayers.…”

Section: Resultsmentioning

confidence: 99%

Tunable Electronic Properties and Potential Applications of BSe/XS₂ (X=Mo, W) van der Waals Heterostructures

Zhang

Gao

Chen

et al. 2020

Advcd Theory and Sims

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Constructing van der Waals (vdW) heterostructures by using different 2D materials is an effective strategy to overcome the shortcoming of single 2D materials. Recently, a novel 2D material boron selenide (BSe) has been predicted, holding a hexagonal structure similar to 2D transition metal dichalcogenides (TMDs). In this paper, the MoS 2 /BSe, and WS 2 /BSe heterostructures are therefore constructed, finding that they are type-II band alignment semiconductors with bandgaps of 1.46 and 1.73 eV, respectively. Moreover, an indirect-to-direct bandgap transition, and a band alignment transition can be achieved by applying the perpendicular external electric fields to the vdW heterostructures. In addition, the two built heterostructures have a good optical absorption (10 4), a broad optical absorption, and one competitive power conversion efficiencies (PCEs). The results also show that the PCE of the MoS 2 /BSe heterostructures can be improved by increasing the number of BSe layers (11.63% for MoS 2-2BSe and 13.55% for MoS 2-3BSe). This study provides a practical way for BSe/TMDs vdW heterostructures in optoelectronic applications.

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ZnO/WSe₂ vdW heterostructure for photocatalytic water splitting

Abstract: Hydrogen production by water splitting using a particular photocatalyst has received extensive attention as a substitute for clean energy sources.

Cited by 105 publications

References 60 publications

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Rotation Tunable Photocatalytic Properties of ZnO/GaN Heterostructures

Tunable Electronic Properties and Potential Applications of BSe/XS₂ (X=Mo, W) van der Waals Heterostructures

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ZnO/WSe2 vdW heterostructure for photocatalytic water splitting

Abstract: Hydrogen production by water splitting using a particular photocatalyst has received extensive attention as a substitute for clean energy sources.

Cited by 105 publications

References 60 publications

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS2 Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS2 Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Rotation Tunable Photocatalytic Properties of ZnO/GaN Heterostructures

Tunable Electronic Properties and Potential Applications of BSe/XS2 (X=Mo, W) van der Waals Heterostructures

Contact Info

Product

Resources

About

ZnO/WSe₂ vdW heterostructure for photocatalytic water splitting

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Tunable Electronic Properties and Potential Applications of BSe/XS₂ (X=Mo, W) van der Waals Heterostructures