Synergy between van der waals heterojunction and vacancy in ZnIn2S4/g-C3N4 2D/2D photocatalysts for enhanced photocatalytic hydrogen evolution

Qin, Yingying; Li, Hong; Lü, Jian; Feng, Yonghai; Meng, Fanying; Ma, Changchang; Yan, Yongsheng; Meng, Minjia

doi:10.1016/j.apcatb.2020.119254

Cited by 341 publications

(110 citation statements)

References 70 publications

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“…2D/2D hetero‐junctions constructed by compact hetero‐interfaces contacting over a large surface exhibit the shortest charge carrier diffusion path, which is crucial for the separation and transfer of photo‐generated electron–hole pairs. [ 28–33 ] However, these common 2D/2D photocatalysts constructed by conventional self‐supported nanosheets are still stacked seriously, which hinder the effective separation and transfer of photo‐generated charge carriers. Thereby, rational design/selection of 2D substrate materials and coupling with ZnIn 2 S 4 NSs in the form of 2D/2D hetero‐interface is of great significance for highly efficient PHE.…”

Section: Introductionmentioning

confidence: 99%

Ni₁₋_xCo_xSe₂C/ZnIn₂S₄ Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H₂‐Releasing Photocatalysis

Chao

Zhou

Lai

et al. 2021

Adv Funct Materials

108

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Designing a semiconductor‐based heterostructure photocatalyst for achieving the efficient separation of photogenerated electron‐hole pairs is highly important for enhancing H2 releasing photocatalysis. Here, a new class of Ni1−xCoxSe2–C/ZnIn2S4 hierarchical nanocages with abundant and compact ZnIn2S4 nanosheets/Ni1−xCoxSe2C nanosheets 2D/2D hetero–interfaces, is designed and synthesized. The constructed heterostructure photocatalyst exposes rich hetero‐junctions, supplying the broad and short transfer paths for charge carriers. The close contacts of these two kinds of nanosheets induce a strong interaction between ZnIn2S4 and Ni1−xCoxSe2C, improving the separation and transfer of photo‐generated electron‐hole pairs. As a consequence, the distinctive Ni1−xCoxSe2C/ZnIn2S4 hierarchical nanocages without using additional noble‐metal cocatalysts, display remarkable H2‐relaesing photocatalytic activity with a rate of 5.10 mmol g−1 h−1 under visible light irradiation, which is 6.2 and 30 times higher than those of fresh ZnIn2S4 nanosheets and bare Ni1−xCoxSe2C nanocages, respectively. Spectroscopic characterizations and theory calculations reveal that the strong interaction between ZnIn2S4 and Ni1−xCoxSe2C 2D/2D hetero‐interfaces can powerfully promote the separation of photo‐generated charge carriers and the electrons transfer from ZnIn2S4 to Ni1−xCoxSe2C.

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Section: Introductionmentioning

confidence: 99%

Ni₁₋_xCo_xSe₂C/ZnIn₂S₄ Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H₂‐Releasing Photocatalysis

Chao

Zhou

Lai

et al. 2021

Adv Funct Materials

108

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“…[ 9–13 ] Moreover, g‐C 3 N 4 is a good visible‐light‐response semiconductor with a bandgap of 2.7 eV; [ 14,15 ] its suitable conduction band (CB) position (−1.12 eV vs NHE) endows it with a strong reducing ability. [ 16 ] Therefore, g‐C 3 N 4 with semiconductors that have strong oxidizing ability, such as ZnIn 2 S 4 , [ 17 ] Bi 4 O 5 I 2 , [ 18 ] and Ag 2 O, [ 19 ] were applied to prepare various heterogeneous photocatalysts. Although all of them show enhanced activities for their improved carrier separation efficiency, their II‐scheme photocatalytic mechanism weakens their redox abilities relative to individual components.…”

Section: Introductionmentioning

confidence: 99%

Construction of an Ultrathin S‐Scheme Heterojunction Based on Few‐Layer g‐C₃N₄ and Monolayer Ti₃C₂T_x MXene for Photocatalytic CO₂ Reduction

et al. 2020

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As charge carriers transfer is critical for the photocatalytic activity enhancement of step‐scheme (S‐scheme) photocatalysts, facile construction of a S‐scheme heterojunction with great contact area and strong interaction between the compositions is highly desirable. Herein, an ultrathin S‐scheme heterojunction g‐C3N4/TiO2/C (SL‐EAC) consisting of few‐layer g‐C3N4 nanosheets on monolayer Ti3C2Tx MXene converted TiO2/C is prepared through an electrostatic self‐assembly and calcination method. The monolayer Ti3C2Tx can not only prevent g‐C3N4 from agglomerating through forming close contact with g‐C3N4, but its conversion to TiO2/C during calcination can build a bridge between the relatively inert TiO2 and multigroup‐terminated Ti3C2Tx, which indirectly enhances the interface contact between TiO2/C and g‐C3N4. SL‐EAC with a thickness of around 5 nm shows much better photocatalytic CO2 reduction performance than g‐C3N4, TiO2/C prepared by calcination of monolayer Ti3C2Tx and g‐C3N4/TiO2/C (EAC) prepared by the same method but monolayer Ti3C2Tx is altered by multilayer Ti3C2Tx. The excellent performance of SL‐EAC is attributed to the large contact area between g‐C3N4 and TiO2/C, which is conducive to the S‐scheme transfer of photogenerated charge carriers. Moreover, the samples prepared using different methods are also investigated, which further confirms the great contact area and strong interaction between the composites in ultrathin SL‐EAC.

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“…[ 205 ] Furthermore, the defects can act as “electron acceptors” as electrons tend to be accommodated around the defects to maintain charge balance locally and also serve as active sites for the adsorption and activation of reactants. Hence, defect engineering (including vacancies formation, lattice distortions, and dopants) has been exploited to improve the physical and chemical properties of 2D TMOs and TMCs such as Nb 2 O 5 , [ 206 ] MoO x , [ 207 ] TiO 2 , [ 208 ] MoS 2 , [ 209 ] Co 3 S 4 , [ 210 ] NiCo 2 S 4 , [ 211 ] ZnIn 2 S 4 , [ 212 ] Cu 3 Se 2 , [ 213 ] Cu 2 Se, [ 214 ] etc. Understanding how defects contribute to the structural and catalytic properties of 2D materials helps advance the design of novel 2D catalysts.…”

Section: Tuning the Catalytic Performances Of 2d Tmos And Tmcsmentioning

confidence: 99%

Two‐Dimensional Transition Metal Oxides and Chalcogenides for Advanced Photocatalysis: Progress, Challenges, and Opportunities

et al. 2020

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Sunlight‐driven catalytic reactions are appealing for resolving energy and environmental problems. Transition metal oxides (TMOs) and chalcogenides (TMCs) comprise one of the most popular categories of photocatalysts, thanks to their high stability, low cost, Earth abundance, and outstanding catalytic activity. Downsizing TMOs and TMCs to 2D materials offers additional opportunities to finely tune their surface, electronic, and catalytic properties. However, 2D TMOs and TMCs fall into a less mature field than other well‐established 2D materials. Less is known about their “form‐to‐function” relationship, and mechanisms for their synthesis await more research. Herein, the progress toward the rational design of layered and nonlayered 2D TMOs and TMCs is summarized, as well as principles to engineer their nanosheets (NSs) into 3D architectures for practical application. The formation mechanisms and crystal growth models of these 2D materials are included. The key factors that determine the electronic, surface structures, and catalytic properties of 2D TMOs and TMCs are examined in particular, which are key considerations in tuning their performance in light absorption, charge carrier transfer/separation, molecule capture and activation, etc. Finally, the present challenges and future research directions in this promising field are illustrated.

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Synergy between van der waals heterojunction and vacancy in ZnIn2S4/g-C3N4 2D/2D photocatalysts for enhanced photocatalytic hydrogen evolution

Cited by 341 publications

References 70 publications

Ni₁₋_xCo_xSe₂C/ZnIn₂S₄ Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H₂‐Releasing Photocatalysis

Ni₁₋_xCo_xSe₂C/ZnIn₂S₄ Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H₂‐Releasing Photocatalysis

Construction of an Ultrathin S‐Scheme Heterojunction Based on Few‐Layer g‐C₃N₄ and Monolayer Ti₃C₂T_x MXene for Photocatalytic CO₂ Reduction

Two‐Dimensional Transition Metal Oxides and Chalcogenides for Advanced Photocatalysis: Progress, Challenges, and Opportunities

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Synergy between van der waals heterojunction and vacancy in ZnIn2S4/g-C3N4 2D/2D photocatalysts for enhanced photocatalytic hydrogen evolution

Cited by 341 publications

References 70 publications

Ni1−xCoxSe2C/ZnIn2S4 Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H2‐Releasing Photocatalysis

Ni1−xCoxSe2C/ZnIn2S4 Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H2‐Releasing Photocatalysis

Construction of an Ultrathin S‐Scheme Heterojunction Based on Few‐Layer g‐C3N4 and Monolayer Ti3C2Tx MXene for Photocatalytic CO2 Reduction

Two‐Dimensional Transition Metal Oxides and Chalcogenides for Advanced Photocatalysis: Progress, Challenges, and Opportunities

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Ni₁₋_xCo_xSe₂C/ZnIn₂S₄ Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H₂‐Releasing Photocatalysis

Ni₁₋_xCo_xSe₂C/ZnIn₂S₄ Hybrid Nanocages with Strong 2D/2D Hetero‐Interface Interaction Enable Efficient H₂‐Releasing Photocatalysis

Construction of an Ultrathin S‐Scheme Heterojunction Based on Few‐Layer g‐C₃N₄ and Monolayer Ti₃C₂T_x MXene for Photocatalytic CO₂ Reduction