The progress of g-C3N4 in photocatalytic H2 evolution: From fabrication to modification

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 500, P. 215489 - 215489

Published: Nov. 2, 2023

Language: Английский

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Unveiling the Bifunctional Photo/Electrocatalytic Activity of In Situ Grown CdSe QDs on g-C₃N₄ Nanosheet Z-Scheme Heterostructures for Efficient Hydrogen Generation

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(2), P. 691 - 702

Published: Jan. 2, 2024

The successive ionic layer adsorption and reaction (SILAR) method was used to deposit several CdSe quantum dots (QDs) on the surface of g-C3N4 nanosheets. In comparison single moiety g-C3N4, as-prepared heterostructures displayed an improved bifunctional photo- electrocatalytic activity for oxygen (OER) hydrogen evolution reactions (HER). Significantly, 30 SILAR cycles optimized QDs/g-C3N4 heterostructure exhibited high performances stabilities OER HER in alkaline conditions. catalyst also efficient photocatalytic toward H2 produced 4306 μmol gas with 23.8% apparent yield presence triethanolamine as a sacrificial agent. Photoluminescence spectroscopy, electron paramagnetic resonance, impedance spectroscopy suggest that synergy between nanosheets QDs leads higher catalytic activities, indicated by low overpotentials 147 218 mV obtain 10 mA cm–2 current density reactions, respectively. Furthermore, situ Fourier transform infrared liquid chromatography–mass high-performance chromatography were conducted determine photochemical intermediate products confirm successful oxidation TEOA capturing holes. outcome is accordance fact photogenerated electrons are transferred from conduction band (CB) valence (VB) Z-scheme manner.

Language: Английский

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Recent Advances in g-C3N4-Based Materials and Their Application in Energy and Environmental Sustainability

Molecules, Journal Year: 2023, Volume and Issue: 28(1), P. 432 - 432

Published: Jan. 3, 2023

Graphitic carbon nitride (g-C3N4), with facile synthesis, unique structure, high stability, and low cost, has been the hotspot in field of photocatalysis. However, photocatalytic performance g-C3N4 is still unsatisfactory due to insufficient capture visible light, surface area, poor electronic conductivity, fast recombination photogenerated electron-hole pairs. Thus, different modification strategies have developed improve its performance. In this review, properties preparation methods are systematically introduced, various approaches, including morphology control, elemental doping, heterojunction construction, nanomaterials, discussed. Moreover, applications energy environmental sustainability summarized, such as hydrogen generation, CO2 reduction, degradation contaminants recent years. Finally, concluding remarks perspectives on challenges, suggestions for exploiting g-C3N4-based photocatalysts presented. This review will deepen understanding state art g-C3N4, fabrication, modification, application sustainability.

Language: Английский

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Enhanced hydrogen generation via overall water splitting using novel MoS2-BN nanoflowers assembled TiO2 ternary heterostructures

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(58), P. 22044 - 22059

Published: March 28, 2023

Language: Английский

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Treasure trove for efficient hydrogen evolution through water splitting using diverse perovskite photocatalysts

Materials Today Chemistry, Journal Year: 2023, Volume and Issue: 29, P. 101387 - 101387

Published: Feb. 10, 2023

Language: Английский

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Graphitic carbon nitride (g-C3N4) synthesis and heterostructures, principles, mechanisms, and recent advances: A critical review

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(84), P. 32708 - 32728

Published: May 21, 2023

Language: Английский

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Photo/electrocatalytic hydrogen evolution using Type-II Cu2O/g-C3N4 Heterostructure: Density functional theory addresses the improved charge transport efficiency

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 652, P. 1467 - 1480

Published: Aug. 24, 2023

Language: Английский

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Exploiting multiferroicity of TbFeO3 nanoparticles for hydrogen generation through photo/electro/photoelectro-catalytic water splitting

International Journal of Hydrogen Energy, Journal Year: 2022, Volume and Issue: 48(14), P. 5493 - 5505

Published: Dec. 1, 2022

Language: Английский

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MoS₂ Nanoflower-Deposited g-C₃N₄ Nanosheet 2D/2D Heterojunction for Efficient Photo/Electrocatalytic Hydrogen Evolution

ACS Applied Energy Materials, Journal Year: 2023, Volume and Issue: 6(23), P. 12003 - 12012

Published: Nov. 28, 2023

The development of heterostructures for precise electron-transfer paths at the p–n junction interface is great significance photo/electrocatalytic (EC) applications. In this paper, we have presented a strategy to precisely transfer electrons from conduction band MoS2 valence site g-C3N4 through Z-scheme manner. heterostructure demonstrated 2-fold improvement in catalytic efficiency 20 wt % MoS2/g-C3N4 (18.04 mmol/gcat–1) with an apparent quantum yield (AQY) H2 generation approaching 34% by using 300 W Xe lamp. enhanced photocatalytic (PC) evolution catalyst shows that addition NSs causes more active sites and prevention electron–hole pair recombination facilitating increased rate electron transport interface. addition, required lowest overpotentials 410 262 mV reach mA cm–2 current density OER HER performances, respectively. Subsequently, impedance spectroscopy indicates low charge resistance, photoluminescence analysis showed better-photogenerated kinetics heterostructures, which contributed their improved photo/electrochemical performance. For intriguing applications future, study offers path designing synthesizing chemically linked atomic accuracy. Further, postphoto/electrocatalytic characterizations revealed intact geometry catalyst, indicating long-term durability catalyst.

Language: Английский

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Decorating Thermodynamically Stable (101) Facets of TiO₂ with MoO₃ for Multifunctional Sustainable Hydrogen Energy and Ammonia Gas Sensing Applications

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 63(1), P. 304 - 315

Published: Dec. 26, 2023

The simultaneous realization of sustainable energy and gas sensors dealing with the emission pollutants is indispensable as former thrives on minimization latter. However, there a dearth multifunctional nanocatalysts in literature. This ascertains importance semiconductors which can be utilized H2 generation via overall water splitting sensing global such NH3. MoO3-decorated TiO2 Z-scheme heterostructures exceptionally escalate photochemical photo/electrochemical evolution performance response owing to synergistic relationship between MoO3. Extensive structural, morphological, optical characterizations, theoretical studies, XPS results were exploited develop mechanistic framework evolution. optimum TiO2–MoO3 composition (20 wt % MoO3–TiO2) was found nearly 12- 20-fold superior pristine MoO3 photocatalysts, respectively, remarkable rate 9.18 mmol/g/h AQY 36.02%. In addition, 20 MoO3–TiO2 also showed advanced efficiency 0.61/0.7 V overpotential values toward HER due higher electrochemically active surface area Tafel slope low 65 mV/dec. NH3 turned out 2.5-fold than that sensor.

Language: Английский

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