Composition-dependent activity of ZnxCd1-xSe solid solution coupled with Ni2P nanosheets for visible-light-driven photocatalytic H2 generation

“…As depicted in Figure a, bare CdS yields low visible-light-driven photocatalytic HER activity of only 16.05 μmol hydrogen in 3 h. Meanwhile, the Ni 3 S 4 /Ni 2 P@C co-catalyst was nearly inactive for the photocatalytic HER (Figure b). However, incorporating the Ni 3 S 4 /Ni 2 P@C co-catalyst can effectively improve the catalytic activity of CdS, which is possibly reasonably associated with the formation of a heterointerface in CdS/Ni 3 S 4 /Ni 2 P@C. , The HER rate is closely related to the proportion of the Ni 3 S 4 /Ni 2 P@C co-catalyst in the CdS/Ni 3 S 4 /Ni 2 P@C heterostructure, with CdS/Ni 3 S 4 /Ni 2 P@C-2 (10 wt % co-catalyst) yielding the highest HER rate of 21.56 mmol g –1 h –1 , which was 26 times that of bare CdS, corresponding to an apparent quantum yield (AQY) of about 18.5%. As seen from Table , CdS/Ni 3 S 4 /Ni 2 P@C-2 has favorable activity compared with the most reported CdS-based photocatalysts.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical CdS/Ni₃S₄/Ni₂P@C Photocatalyst for Efficient H₂ Evolution under Visible-Light Irradiation

Yao

et al. 2023

ACS Appl. Mater. Interfaces

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Structural and morphological modulations play a crucial role in increasing the surface active sites of semiconductor photocatalysts for visible-light-driven water splitting. To fabricate a novel CdS/Ni3S4/Ni2P@C heterostructure, we first prepared carbon-encapsulated Ni3S4/Ni2P (Ni3S4/Ni2P@C) with a high surface area by sequential carbonization and phosphorization of a Ni-metal–organic framework (MOF) precursor. Combined characterization and photoelectrochemical measurement results reveal that the assembly of CdS nanowires and highly porous Ni3S4/Ni2P@C can enhance the visible-light response capability of the CdS/Ni3S4/Ni2P@C heterostructure catalyst by reducing the forbidden band gap of CdS. The hydrogen production rate of 21.56 mmol h–1 g–1 for CdS/Ni3S4/Ni2P@C with a Ni3S4/Ni2P@C mass fraction of 10 wt % was 26 times higher than that of CdS in a photolytic aquatic hydrogen system. A possible mechanism for the photocatalytic enhancement of the Ni3S4/Ni2P@C co-catalyst was systematically investigated and discussed. This research opens a new strategy for constructing ternary heterojunction photocatalysts via MOF precursors.

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“…First, H 2 generation with photocatalytic semiconductor materials was confirmed in 1972 by Fujishima and Honda [ 6 ]. Since then, plenty of semiconductors have been developed to assess their efficiency and performance for hydrogen evolution [ 7 , 8 , 9 , 10 , 11 ]. It should be pointed out that optimizing the band structure of the photocatalytic materials plays a crucial and key role in improvement of the photocatalytic efficiency by fostering charge carriers’ separation, as well as preventing photo-corrosion and providing long-term stability.…”

Section: Introductionmentioning

confidence: 99%

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

et al. 2022

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Developing eco-friendly strategies to produce green fuel has attracted continuous and extensive attention. In this study, a novel gas-templating method was developed to prepare 2D porous S-doped g-C3N4 photocatalyst through simultaneous pyrolysis of urea (main g-C3N4 precursor) and ammonium sulfate (sulfur source and structure promoter). Different content of ammonium sulfate was examined to find the optimal synthesis conditions and to investigate the property-governed activity. The physicochemical properties of the obtained photocatalysts were analyzed by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), scanning transmission electron microscopy (STEM), specific surface area (BET) measurement, ultraviolet-visible light diffuse reflectance spectroscopy (UV/vis DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy and reversed double-beam photo-acoustic spectroscopy (RDB-PAS). The as-prepared S-doped g-C3N4 photocatalysts were applied for photocatalytic H2 evolution under vis irradiation. The condition-dependent activity was probed to achieve the best photocatalytic performance. It was demonstrated that ammonium sulfate played a crucial role to achieve concurrently 2D morphology, controlled nanostructure, and S-doping of g-C3N4 in a one-pot process. The 2D nanoporous S-doped g-C3N4 of crumpled lamellar-like structure with large specific surface area (73.8 m2 g−1) and improved electron−hole separation showed a remarkable H2 generation rate, which was almost one order in magnitude higher than that of pristine g-C3N4. It has been found that though all properties are crucial for the overall photocatalytic performance, efficient doping is probably a key factor for high photocatalytic activity. Moreover, the photocatalysts exhibit significant stability during recycling. Accordingly, a significant potential of S-doped g-C3N4 has been revealed for practical use under natural solar radiation.

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Composition-dependent activity of ZnxCd1-xSe solid solution coupled with Ni2P nanosheets for visible-light-driven photocatalytic H2 generation

Cited by 28 publications

References 54 publications

Modulating and optimizing 2D/2D Fe-Ni₂P/ZnIn₂S₄with S vacancy through surface engineering for efficient photocatalytic H₂evolution

Modulating and optimizing 2D/2D Fe-Ni₂P/ZnIn₂S₄with S vacancy through surface engineering for efficient photocatalytic H₂evolution

Hierarchical CdS/Ni₃S₄/Ni₂P@C Photocatalyst for Efficient H₂ Evolution under Visible-Light Irradiation

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

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Composition-dependent activity of ZnxCd1-xSe solid solution coupled with Ni2P nanosheets for visible-light-driven photocatalytic H2 generation

Cited by 28 publications

References 54 publications

Modulating and optimizing 2D/2D Fe-Ni2P/ZnIn2S4with S vacancy through surface engineering for efficient photocatalytic H2evolution

Modulating and optimizing 2D/2D Fe-Ni2P/ZnIn2S4with S vacancy through surface engineering for efficient photocatalytic H2evolution

Hierarchical CdS/Ni3S4/Ni2P@C Photocatalyst for Efficient H2 Evolution under Visible-Light Irradiation

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

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Modulating and optimizing 2D/2D Fe-Ni₂P/ZnIn₂S₄with S vacancy through surface engineering for efficient photocatalytic H₂evolution

Modulating and optimizing 2D/2D Fe-Ni₂P/ZnIn₂S₄with S vacancy through surface engineering for efficient photocatalytic H₂evolution

Hierarchical CdS/Ni₃S₄/Ni₂P@C Photocatalyst for Efficient H₂ Evolution under Visible-Light Irradiation