The role of bandgap and interface in enhancing photocatalytic H2 generation activity of 2D-2D black phosphorus/MoS2 photocatalyst

Yuan, Yong‐Jun; Wang, Pei; Li, Zijian; Wu, Yingzhen; Bai, Wangfeng; Su, Yibing; Guan, Jie; Wu, Shiting; Zhong, Jiasong; Yu, Zhen‐Tao; Zou, Zhigang

doi:10.1016/j.apcatb.2018.09.100

Cited by 179 publications

(67 citation statements)

References 50 publications

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“…The face contact between BP nanosheets and CdS particles promotes fast charge transfer, improving electron-hole separation efficiency. [26] Meanwhile, the point contact between CdS and CoÀ P(O) leads to antenna effect, collecting electrons and lowering the energy barrier of photocatalytic reduction reactions. The active sites of BPÀ Co are further revealed by using photosensitizer Eosin Y to exclude the influence from semiconductor CdS.…”

Section: Resultsmentioning

confidence: 99%

Single Cobalt Atom Anchored Black Phosphorous Nanosheets as an Effective Cocatalyst Promotes Photocatalysis

Ren

Shi

et al. 2020

ChemCatChem

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Exploring novel cocatalysts with sufficient active sites and rapid photogenerated carrier separation remains challenge for boosting photocatalytic reactions. Recently, two‐dimensional (2D) black phosphorus (BP) has been developed and recognized to be an ideal platform for anchoring metal ions through lone pair electrons. Herein, we propose a new structure that cobalt atomically dispersed on BP nanosheets (BP−Co), and apply it as cocatalyst for photocatalytic H2 evolution and CO2 reduction under visible light (>420 nm) irradiation. Both scanning transmission electron microscope and X‐ray absorption near edge structure verified the existence of phosphorous‐coordinated Co sites. The interaction between Co and P brings greatly improvement on photocatalytic activities, and 18‐fold enhancement can be achieved on CdS when taking BP−Co as a noble‐metal‐free cocatalyst for H2 evolution, which is higher than that of Pt under the same conditions. Besides, BP−Co can also be used as an effective cocatalyst to promote photocatalytic CO2 reduction in the presence of photosensitizer [Ru(2, 2’‐bipyridy)3]Cl2 with a CO evolution rate of 88.6 μmol h−1, superior to those obtained from the state‐of‐the‐art cocatalysts. It is anticipated that the current work might provide basic understanding as well as new opportunities on 2D BP nanosheets for versatile photocatalytic reactions.

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Section: Resultsmentioning

confidence: 99%

Single Cobalt Atom Anchored Black Phosphorous Nanosheets as an Effective Cocatalyst Promotes Photocatalysis

Ren

Shi

et al. 2020

ChemCatChem

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“…[ 54 ] As compared with the point and linear interfaces, the planar interfaces based on 2D materials possess the largest contact areas, which allow more charge transfer through the interface. [ 55,56 ] Yu and co‐workers prepared 2D/2D Ti 3 C 2 /Bi 2 WO 6 heterojunctions by the in situ “face‐to‐face” growth of ultrathin Bi 2 WO 6 nanosheets on the Ti 3 C 2 ultrathin nanosheets fabricated by the ultrasonic exfoliation of etched Ti 3 AlC 2 . [ 57 ] The obtained atomic force microscopy (AFM) images and related height profiles show that the heights of 1.23 and 1.48 nm are assigned to Ti 3 C 2 nanosheets, whereas the larger heights of 3.65, 2.42, and 2.93 nm are ascribed to Bi 2 WO 6 nanosheets ( Figure a,b).…”

Section: Heterogeneous Interfacesmentioning

confidence: 99%

Atomic‐Level and Modulated Interfaces of Photocatalyst Heterostructure Constructed by External Defect‐Induced Strategy: A Critical Review

Zhang

et al. 2020

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Despite the existence of numerous photocatalyst heterostructures, their separation efficiency and charge flow precision remain low due to the poor study on interfacial properties. The photocatalysts with confined defects can effectively control the photogenerated carrier migration, but the metastability of such defects considerably decreases the photocatalyst stability. Meanwhile, the introduction of defective region can increase the coordinative unsaturation and delocalize local electrons to promote their interactions with the molecules/ions in that region. The selective growth of modulated heterogeneous interface by defect‐induced strategy may not only increase the stability of defective structures, but also enhance the migration of interfacial charges. Using this method, photocatalytic heterostructures with low contact resistances and intimate interfaces are constructed to achieve the optimal charge migration in terms of efficiency and accuracy. In this work, the point, linear, and planar heterogeneous interfaces and related defect engineering techniques are discussed. Particularly, it is focused on the external, defect‐induced interfacial heterogeneities with various spatial and dimensional configurations, which exhibit modulated and controllable interfacial properties. Furthermore, the main aspects of fabricating photocatalyst heterostructures by the defect‐induced strategy, including the i) controllable generation of defects, ii) advanced characterization methods, and iii) elaborate construction of the minimal interface, are described.

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“…The photocatalytic H 2 evolution performance of 2D layered niobate oxides (e.g., SnNb 2 O 6 ) can also be improved by coupling 2D MoS 2 nanosheets [70]. More recently, Yuan's group [82] further employed 2D MoS 2 nanosheets to combine with 2D metal-free semiconductors to form BP/MoS 2 and g-C 3 N 4 /MoS 2 [81] 2D/2D composites. In the BP/MoS 2 2D/2D photocatalyst system, the MoS 2 acts as both an electron sink and a cocatalyst which will greatly reduce the recombination of electron-hole pairs, while the 2D/2D smart structure provides large 2D nanointerfaces for photogenerated charge transfer, and thus synergistically promotes the H 2 evolution rate (Fig.…”

Section: Hydrogen Generationmentioning

confidence: 99%

2D/2D heterostructured photocatalyst: Rational design for energy and environmental applications

2020

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Two-dimensional/two-dimensional (2D/2D) hybrid nanomaterials have triggered extensive research in the photocatalytic field. The construction of emerging 2D/2D heterostructures can generate many intriguing advantages in exploring high-performance photocatalysts, mainly including preferable dimensionality design allowing large contact interface area, integrated merits of each 2D component and rapid charge separation by the heterojunction effect. Herein, we provide a comprehensive review of the recent progress on the fundamental aspects, general synthesis strategies (in situ growth and ex situ assembly) of 2D/2D heterostructured photocatalysts and highlight their applications in the fields of hydrogen evolution, CO 2 reduction and removal of pollutants. Furthermore, the perspectives on the remaining challenges and future opportunities regarding the development of 2D/2D heterostructure photocatalysts are also presented.

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The role of bandgap and interface in enhancing photocatalytic H2 generation activity of 2D-2D black phosphorus/MoS2 photocatalyst

Cited by 179 publications

References 50 publications

Single Cobalt Atom Anchored Black Phosphorous Nanosheets as an Effective Cocatalyst Promotes Photocatalysis

Single Cobalt Atom Anchored Black Phosphorous Nanosheets as an Effective Cocatalyst Promotes Photocatalysis

Atomic‐Level and Modulated Interfaces of Photocatalyst Heterostructure Constructed by External Defect‐Induced Strategy: A Critical Review

2D/2D heterostructured photocatalyst: Rational design for energy and environmental applications

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