Regulation CN reduction of CO2 products selectivity by adjusting the number of V sites and mechanism exploration

Fuel, Journal Year: 2025, Volume and Issue: 388, P. 134509 - 134509

Published: Jan. 31, 2025

Language: Английский

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Poly(triazine imide) Crystals for Efficient CO₂ Photoreduction: Surface Pyridine Nitrogen Dominates the Performance

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 1018 - 1026

Published: Jan. 2, 2025

Polymeric carbon nitrides (PCNs), usually the melon phase, have been extensively applied as photocatalysts for CO2 reduction; however, their performance is still unsatisfactory. The condensed allotrope, namely, poly(triazine imide) (PTI) with extended conjugation and a crystallized structure, indeed holds more favorable compositional structural advantages photocatalytic reduction but remains to be fully exploited. Herein, hexagonal prism-shaped PTI crystals were synthesized developed high-performance photocatalyst reduction. With Co(bpy)32+ cocatalyst, exhibit CO evolution rate of 44 μmol h–1 (i.e., 1467 g–1 h–1) 93% selectivity, markedly superior that counterpart. Moreover, manifest an apparent quantum efficiency 12.9% at 365 nm, representing state-of-the-art value by PCN CO2-to-CO without using noble metals. surface pyridine N species are exposed active sites dominate activation conversion, which, together high crystallinity facilitate charge separation transport, endows efficiency. In situ diffuse reflectance infrared Fourier transform spectroscopy determines key intermediates during reaction and, consequently, constructs possible mechanism.

Language: Английский

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A novel breakthrough in the invention, properties, synthesis of covalent heptazine framework for its sustainable applications

Materials Today, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Molten salt-assisted anti-defect engineering to tailor ordered, highly crystalline g-C3N4 nanorods for efficient photocatalytic H2O2 production

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 475, P. 146497 - 146497

Published: Oct. 6, 2023

Language: Английский

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Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Small, Journal Year: 2023, Volume and Issue: 20(2)

Published: Sept. 5, 2023

Abstract Cyano‐rich g‐C 3 N 4 materials are widely used in various fields of photochemistry due to the very powerful electron‐absorbing ability and electron storage function cyano, as well its advantages improving light absorption, adjusting energy band structure, increasing polarization rate density active site concentration, promoting oxygen activation ability. Notwithstanding, there is yet a huge knowledge break design, preparation, detection, application, prospect cyano‐rich . Accordingly, an overall review arranged substantially comprehend research progress position materials. An overview current synthesis, characterization (determination their location quantity), reaction mechanism analysis provide quantity novel suggestions for cyano‐modified carbon nitride materials' construction provided. In view prevailing challenges outlooks materials, this paper will purify growth direction , achieve more in‐depth exploration broaden applications

Language: Английский

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Metal-doped carbon nitride: an all-in-one photocatalyst

EES Catalysis, Journal Year: 2023, Volume and Issue: 1(6), P. 810 - 831

Published: Jan. 1, 2023

Graphitic carbon nitride (CN) has received significant attention for energy conversion. Metal doped CNs, as all-in-one photocatalysts, integrate light absorption, charge separation, and reactive site by incorporating atomic metal into CN framework.

Language: Английский

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Solar-Driven Cellulose Photorefining into Arabinose over Oxygen-Doped Carbon Nitride

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(5), P. 3376 - 3386

Published: Feb. 16, 2024

Biomass photorefining is a promising strategy to address the energy crisis and transition toward carbon carbon-neutral society. Here, we demonstrate feasibility of direct cellulose into arabinose by rationally designed oxygen-doped polymeric nitride, which generates favorable oxidative species (e.g., O2–, •OH) for selective reactions at neutral conditions. In addition, also illustrate mechanism photocatalytic conversion density functional theory calculations. The oxygen insertion derived from radicals C1 position glucose within leads cleavage β-1,4 glycosidic linkages, resulting in subsequent gluconic acid formation. following decarboxylation process via C1–C2 α-scissions, triggered surface active sites, formic acid, respectively. This work not only offers mechanistic understanding but sets up an example illuminating path value-added bioproducts under mild

Language: Английский

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Construction of a graphitic carbon nitride-based photocatalyst with a strong built-in electric field via π–π stacking interactions boosting photocatalytic CO₂ reduction

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(13), P. 7807 - 7816

Published: Jan. 1, 2024

A high-efficiency photocatalyst with a strong built-in electric field was fabricated by anchoring π-conjugated molecules on the surface of crystalline nitride carbon via π–π stacking interactions efficient photocatalytic CO 2 reduction into and CH 4 .

Language: Английский

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Photocarrier tunneling triggering CO₂ photocatalysis

Chemical Science, Journal Year: 2024, Volume and Issue: 15(27), P. 10625 - 10637

Published: Jan. 1, 2024

Insulating polymer is harnessed as an unexpected electron tunneling mediator to boost interfacial charge migration and separation over transition metal chalcogenides for significantly enhanced solar-to-syngas conversion.

Language: Английский

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Photorefinery of Biomass and Plastics to Renewable Chemicals using Heterogeneous Catalysts

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(37)

Published: June 17, 2024

Abstract The photocatalytic conversion of biomass and plastic waste provides opportunities for sustainable fuel chemical production. Heterogeneous photocatalysts, typically composed semiconductors with distinctive redox properties in their conduction band (CB) valence (VB), facilitate both the oxidative reductive valorization organic feedstocks. This article a comprehensive overview recent advancements photorefinery plastics from perspective photocatalysts. We explore roles VB CB enhancing value‐added via various pathways. Our aim is to bridge gap between mechanisms renewable carbon feedstock valorization, inspiring further development refinery plastics.

Language: Английский

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