Point-to-faceZ-scheme junction Cd0.6Zn0.4S/g-C3N4with a robust internal electric field for high-efficiency H2O2production

Yu, Wenying; Zhu, Zijian; Hu, Cheng; Lin, Sen; Wang, Yinghui; Wang, Chunyang; Tian, Na; Zhang, Yihe; Huang, Hongwei

doi:10.1039/d2ta10074f

Cited by 29 publications

(9 citation statements)

References 47 publications

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“…Thus, the results indicate that excessive CdS will aggregate to reduce the catalytic generation of H 2 O 2 in the research. The phenomena are in good agreement with published data, showing the pivotal role of optimizing the catalysts’ composition and structure in heterojunctions. − …”

Section: Resultssupporting

confidence: 89%

S-Scheme Heterostructured CdS/g-C₃N₄ Nanocatalysts for Piezo-Photocatalytic Synthesis of H₂O₂

Phan,

Nguyen,

Anh

et al. 2023

ACS Appl. Nano Mater.

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Sustainability in catalysis is increasingly becoming the primary target in academic and industrial studies. Regarding the material perspective, designing heterojunction nanocatalysts to produce small molecules, such as hydrogen peroxide (H 2 O 2 ), has been an attractive research theme in recent decades. Nonetheless, most reported materials suffer from a complicated synthetic process with various steps and using unbenign solvents, hindering practical applications on an industrial scale. This study proposed a facile one-step way to fabricate heterostructured CdS/g-C 3 N 4 nanocatalysts to produce H 2 O 2 from water and oxygen under light and ultrasound irradiation. The results showed that the formation of H 2 O 2 mainly relies on oxygen radical species. Oxygen is initially converted into superoxide via excited electrons from CdS, followed by the formation of singlet oxygen from the oxidation process in g-C 3 N 4 sites. Interestingly, the formation of H 2 O 2 in an inert atmosphere is associated with the in situ evolution of oxygen from water oxidation due to the suitable electronic band position of g-C 3 N 4 to drive multioxidation reactions. Charge transfer characterizations illustrate the S-scheme mechanism in the catalytic process, giving a better understanding of the charge transportation phenomenon, thus providing a critical pathway in designing and developing heterojunction materials for catalysis with easier catalyst preparation and operation processes. KEYWORDS: g-C 3 N 4 , CdS, solid-state synthesis, S-scheme heterojunctions, H 2 O 2 , piezo-photocatalysis

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Section: Resultssupporting

confidence: 89%

S-Scheme Heterostructured CdS/g-C₃N₄ Nanocatalysts for Piezo-Photocatalytic Synthesis of H₂O₂

Phan,

Nguyen,

Anh

et al. 2023

ACS Appl. Nano Mater.

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“…The deconvoluted peaks located at 398.86, 399.44, and 399.97 eV in the N 1s spectra of U 150 (Figure 3e) correspond to C−N = C, N−(C) 3 , and N−H bonds, respectively. 37,38 In the spectrum of B 10 U 150 , the characteristic peaks attributed to N−H decrease in proportion and shift to higher binding energies (402.15 eV), indicating that boric acid and urea synergistically improve the crosslinking properties of PVA molecules. 39 The successful detection of the B 1s characteristic peak in the B 10 and B 10 U 150 samples is strong evidence showing that B in boric acid successfully cross-linked with PVA molecules (Figure 3f).…”

Section: Structural Analysis Of Paper-based Compositesmentioning

confidence: 99%

Innovative Design and Construction of Poly(Vinyl Alcohol) Coatings by Plant-Inspired Cross-Linking and Hydrogen Bonding Enabled Oil-Resistant and Strong Paper-Based Composites

Chen,

Dong,

Jin

et al. 2024

ACS Sustainable Chem. Eng.

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“…Hydrogen peroxide (H 2 O 2 ) is a versatile, green, and imperative chemical, and has been widely used as an oxidant in environmental purification, chemical synthesis, disinfection, and sterilization. , Meanwhile, it has also been regarded as a high-energy-density, noncarbon-emitting fuel, and an easily transportable liquid energy carrier alternative to hydrogen in one-compartment fuel cells with no storage issue. Therefore, worldwide, there is a huge annual demand of 2.2 Mt for H 2 O 2 . − At present, up to 95% of the H 2 O 2 generation relies on the primitive multistep anthraquinone hydrogenation-oxidation method, with the two major drawbacks of high energy consumption and toxic byproduct formation .…”

Section: Introductionmentioning

confidence: 99%

MXene Schottky Functionalized Z-scheme Ternary Heterostructure for Enhanced Photocatalytic H₂O₂ Production and H₂ Evolution

Mishra,

Das,

Biswal

et al. 2024

J. Phys. Chem. C

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The design and development of a multiheterostructure interface signifies a promising route to overcome the drawbacks of single-component and traditional heterostructured photocatalysts. Herein, a one-dimensional (1D)/two-dimensional (2D)/2D heterostructure, α-MnO 2 @B/O-g-C 3 N 4 /d-Ti 3 C 2 , is constructed by a facile two-step synthesis method to ensure charge separation and is utilized for photocatalytic H 2 O 2 production and H 2 evolution. The formation of the individual materials and nanohybrids as well as the 1D/2D/2D interfacial interaction is ascertained by X-ray diffraction, Raman, and electron microscopy studies, respectively. 5-MX/MBOCN shows optimum photocatalytic H 2 O 2 production (2846.4 μmol h −1 g −1 ) with 10% ethanol and H 2 evolution (897.2 μmol h −1 ), which is, respectively, 2.5 and 1.6 times higher than that of the binary MBOCN counterpart. The greater cathodic current density from linear sweep voltammetry, hindered charge recombination from electrochemical impedance spectroscopy and photoluminescence measurement, and better photodurability all systematically demonstrated the improved photocatalytic performance. The mechanistic investigation shows that in the ternary hybrid, electrons flow from MnO 2 to boron-doped g-C 3 N 4 through a Z-scheme charge dynamics and then electrons flow to the d-MXene surface, which acts as a cocatalyst. The charge transfer dynamics is corroborated by time-resolved photoluminescence, cyclic voltametric analysis, trapping experiment, and ESR analysis. This work instigates the design and development of a high-efficiency cocatalystintegrated Z-scheme photocatalyst with strong interfacial interaction and high redox ability for solar to chemical energy conversion.

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Point-to-faceZ-scheme junction Cd_0.6Zn_0.4S/g-C₃N₄with a robust internal electric field for high-efficiency H₂O₂production

Abstract: Photocatalytic H2O2 evolution has ignited a remarkable spark in virtue of its outstanding strengths of safety, greenness and low-cost, while severely hindered by the grievous photoinduced carriers’ recombination and sluggish...

Cited by 29 publications

References 47 publications

S-Scheme Heterostructured CdS/g-C₃N₄ Nanocatalysts for Piezo-Photocatalytic Synthesis of H₂O₂

S-Scheme Heterostructured CdS/g-C₃N₄ Nanocatalysts for Piezo-Photocatalytic Synthesis of H₂O₂

Innovative Design and Construction of Poly(Vinyl Alcohol) Coatings by Plant-Inspired Cross-Linking and Hydrogen Bonding Enabled Oil-Resistant and Strong Paper-Based Composites

MXene Schottky Functionalized Z-scheme Ternary Heterostructure for Enhanced Photocatalytic H₂O₂ Production and H₂ Evolution

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Point-to-faceZ-scheme junction Cd0.6Zn0.4S/g-C3N4with a robust internal electric field for high-efficiency H2O2production

Abstract: Photocatalytic H2O2 evolution has ignited a remarkable spark in virtue of its outstanding strengths of safety, greenness and low-cost, while severely hindered by the grievous photoinduced carriers’ recombination and sluggish...

Cited by 29 publications

References 47 publications

S-Scheme Heterostructured CdS/g-C3N4 Nanocatalysts for Piezo-Photocatalytic Synthesis of H2O2

S-Scheme Heterostructured CdS/g-C3N4 Nanocatalysts for Piezo-Photocatalytic Synthesis of H2O2

Innovative Design and Construction of Poly(Vinyl Alcohol) Coatings by Plant-Inspired Cross-Linking and Hydrogen Bonding Enabled Oil-Resistant and Strong Paper-Based Composites

MXene Schottky Functionalized Z-scheme Ternary Heterostructure for Enhanced Photocatalytic H2O2 Production and H2 Evolution

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Product

Resources

About

Point-to-faceZ-scheme junction Cd_0.6Zn_0.4S/g-C₃N₄with a robust internal electric field for high-efficiency H₂O₂production

S-Scheme Heterostructured CdS/g-C₃N₄ Nanocatalysts for Piezo-Photocatalytic Synthesis of H₂O₂

S-Scheme Heterostructured CdS/g-C₃N₄ Nanocatalysts for Piezo-Photocatalytic Synthesis of H₂O₂

MXene Schottky Functionalized Z-scheme Ternary Heterostructure for Enhanced Photocatalytic H₂O₂ Production and H₂ Evolution