Polarization Boosted Solar H<sub>2</sub>O<sub>2</sub> Production over Quantum Dot-Decorated Nanosheets with Rich Oxygen Vacancies

Liu, Jinzhou; Zhou, Xiaofeng; Qian, Jin; Wang, Simin; Ma, Shuyi; Shen, Bo; Tu, Wenguang; Xu, Rong; Liu, Guanyu; Zhai, Jiwei

doi:10.1021/acssuschemeng.3c06462

Cited by 4 publications

(1 citation statement)

References 73 publications

(122 reference statements)

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“…Otherwise, if a type-II heterojunction is formed, the photoinduced electrons on the CB of CNP could be transferred to the COF, and the formed holes on the VB of the COF could directly migrate to the VB of CNP . Under this occasion, the CB of the COF in the COF/CNP5 system is not energetic enough to drive the reduction reactions to produce O 2 / • O 2 – according to the band position. , The • O 2 – is the most active species in the free radical trapping experiments from the COF/CNP5 system (Figures S8 and S9), indicating that the photoinduced electrons concentrate on the CB of CNP. That is to say that the charge transfer between CNP and COF is a mismatch to the type-II heterojunction model.…”

Section: Resultsmentioning

confidence: 99%

Rapid Exciton Dissociation and Charge Transfer Endowed by Reinforced Interfacial Interaction in a Mixed-Dimensional 2D/3D Heterojunction Nanocatalyst for High-Efficiency Photocatalysis

Xing,

Xu,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Graphite carbon nitride (CN) has received tremendous interest, owing to its potential application in photocatalysis. However, excitonic effects stemming from Coulombic interactions limit the application prospect. Herein, mixed-dimensional metalfree two-dimensional/three-dimensional (2D/3D) heterojunction composites combining 2D covalent-organic framework (COF) nanosheets and 3D hollow porous tubular CN with a phosphate group (CNP) were fabricated to target regulation of exciton dissociation. Experimental and characterization investigations revealed that the presence of a phosphate group in hollow porous tubular CN could reinforce the interfacial interaction between CNP and COF and adjust the band structures for the formation of the Z-scheme mechanism. Benefitted from the effective exciton dissociation and accelerated charge transport at the 2D/3D heterostructure interface, the optimal photocatalytic H 2 evolution rate achieved up to 3700 μmol h −1 g −1 , which is much higher than the 3D CN, heterojunction CN, and other CN-based photocatalysts reported previously. It also exhibited an excellent peroxymonosulfate-assisted tetracycline (TC) degradation capability, and the rate constant of TC over the COF/CNP5 sample reached 5.61 and 1.40 times as much as that of COF and CNP. This study affords a meritorious instance to construct a mixed-dimension metal-free heterojunction photocatalyst and opens insights for excitonic regulation.

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Section: Resultsmentioning

confidence: 99%

Rapid Exciton Dissociation and Charge Transfer Endowed by Reinforced Interfacial Interaction in a Mixed-Dimensional 2D/3D Heterojunction Nanocatalyst for High-Efficiency Photocatalysis

Xing,

Xu,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Piezo‐Photocatalytically Induced Dual‐Channel Pathway of Cd_xZn_1‐xS Solid‐Solution Nanorods for Hydrogen Peroxide Evolution

Lin,

Sun,

Zhang

et al. 2024

Adv Materials Technologies

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As a class of clean oxidants, the hydrogen peroxide (H2O2) has shown great application potential in a variety of fields due to its high energy density and convenient storage condition, while the synthesis of H2O2 by the utilization of green energy technology has currently become one of the attentions in energy field. In this paper, the CdxZn1‐xS (x = 0, 0.2, 0.4, 0.6, 0.8, 1) solid solutions with different zinc‐cadmium molar ratios are prepared by a simple solvothermal route, and the H2O2 evolution performances of materials under illumination and ultrasound conditions are explored. The results show that Cd0.4Zn0.6S has the highest H2O2 yield rate of 2866 µmol/g/h under the synergistic effect of ultrasound and illumination without any sacrificial agent, which is higher than those in ultrasonic or light condition alone, showing piezo‐photocatalytic coupling characteristic. The characterizations including piezoresponse force microscopy (PFM), finite element simulation, in situ electron spin resonance (ESR) reveal that the excellent H2O2 production property of the material should be mainly ascribed to its nanorod structure and e−‐h+ dual‐channel reactivity formed by the bending of its energy band under the piezoelectric effect. This work provides reference and enlightenment for the preparation of H2O2 through the green energy avenue.

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Photocatalysis without borders: Charting progress in metal-free hydrogen peroxide synthesis

Saini,

Solanki,

Kaushik

et al. 2024

Journal of Environmental Chemical Engineering

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Polarization Boosted Solar H₂O₂ Production over Quantum Dot-Decorated Nanosheets with Rich Oxygen Vacancies

Cited by 4 publications

References 73 publications

Rapid Exciton Dissociation and Charge Transfer Endowed by Reinforced Interfacial Interaction in a Mixed-Dimensional 2D/3D Heterojunction Nanocatalyst for High-Efficiency Photocatalysis

Rapid Exciton Dissociation and Charge Transfer Endowed by Reinforced Interfacial Interaction in a Mixed-Dimensional 2D/3D Heterojunction Nanocatalyst for High-Efficiency Photocatalysis

Piezo‐Photocatalytically Induced Dual‐Channel Pathway of Cd_xZn_1‐xS Solid‐Solution Nanorods for Hydrogen Peroxide Evolution

Photocatalysis without borders: Charting progress in metal-free hydrogen peroxide synthesis

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Polarization Boosted Solar H2O2 Production over Quantum Dot-Decorated Nanosheets with Rich Oxygen Vacancies

Cited by 4 publications

References 73 publications

Rapid Exciton Dissociation and Charge Transfer Endowed by Reinforced Interfacial Interaction in a Mixed-Dimensional 2D/3D Heterojunction Nanocatalyst for High-Efficiency Photocatalysis

Rapid Exciton Dissociation and Charge Transfer Endowed by Reinforced Interfacial Interaction in a Mixed-Dimensional 2D/3D Heterojunction Nanocatalyst for High-Efficiency Photocatalysis

Piezo‐Photocatalytically Induced Dual‐Channel Pathway of CdxZn1‐xS Solid‐Solution Nanorods for Hydrogen Peroxide Evolution

Photocatalysis without borders: Charting progress in metal-free hydrogen peroxide synthesis

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Polarization Boosted Solar H₂O₂ Production over Quantum Dot-Decorated Nanosheets with Rich Oxygen Vacancies

Piezo‐Photocatalytically Induced Dual‐Channel Pathway of Cd_xZn_1‐xS Solid‐Solution Nanorods for Hydrogen Peroxide Evolution