Bio‐Inspired Supramolecular Self‐Assembled Carbon Nitride Nanostructures for Photocatalytic Water Splitting

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(2)

Published: Sept. 12, 2023

Abstract Fast production of hydrogen and oxygen in large amounts at an economic rate is the need hour to cater needs most awaited energy, a futuristic renewable energy solution. Production through simple water splitting via visible light photocatalytic approach using sunlight considered as one promising sustainable approaches for generating clean fuels. For this purpose, variety catalytic techniques novel catalysts have been investigated. Among these catalysts, carbon nitride presently deemed best candidates photocatalysis due its unique molecular structure adequate visible‐range bandgap. Its bandgap can be further engineered by structural morphological manipulation or doping/hybridization. numerous synthetic nitrides, supramolecular self‐assembly recently developed elegant bottom‐up strategies it bio‐inspired provides facile eco‐friendly route synthesize high surface area with superior features other semiconducting properties. The current review article broadly covers synthesis nanostructures their water‐splitting applications comprehensive outlook on future directions.

Language: Английский

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Protonated g-C3N4/oxygen-doped g-C3N4 S-scheme homojunction fabricated by electrostatic self-assembly for photocatalytic hydrogen evolution and tetracycline hydrochloride degradation

Carbon, Journal Year: 2024, Volume and Issue: 226, P. 119153 - 119153

Published: April 18, 2024

Language: Английский

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The synthesis and key features of 3D carbon nitrides (C3N4) used for CO2 photoreduction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150213 - 150213

Published: March 6, 2024

Language: Английский

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Order–Disorder Engineering of Carbon Nitride for Photocatalytic H₂O₂ Generation Coupled with Pollutant Removal

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(1), P. 784 - 794

Published: Jan. 2, 2024

Highly crystalline carbon nitride (CCN), benefiting from the reduced structural imperfections, enables improved electron-hole separation. Yet, phase with insufficient inherent defects suffers a poor performance toward reaction intermediate adsorption respect to amorphous phase. Herein, crystalline-amorphous (CACN) an isotype structure was constructed via two-step adjacent calcination strategy. Through specific oxygen etching and crystallization, formation of built-in electric field at interface could drive charge transfer separation, thus promoting photoredox reaction. As expected, optimized CACN exhibited H

Language: Английский

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Gas-phase self-assembly: Converting 2D graphitic carbon nitride into 1D nanotubes for improved photocatalytic tetracycline degradation

Ceramics International, Journal Year: 2024, Volume and Issue: 50(9), P. 14686 - 14696

Published: Jan. 29, 2024

Language: Английский

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P-doped and cyano-modified carbon nitride nanotubes for photocatalytic hydrogen evolution coupled with bisphenol A degradation

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 525 - 534

Published: Feb. 1, 2025

Language: Английский

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Cyanuric Acid-Assisted Synthesis of Hierarchical Amorphous Carbon Nitride Assembled by Ultrathin Oxygen-Doped Nanosheets for Excellent Photocatalytic Hydrogen Generation

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(12), P. 14809 - 14821

Published: March 18, 2024

Amorphous carbon nitride with typical short-range order arrangement as an effective photocatalyst is worth exploring but remains a great challenge because its disordered structure induces severe recombination of photogenerated charge carriers. Herein, for the first time, we demonstrate that hierarchical amorphous (HACN) structural oxygen incorporation can be synthesized via cyanuric acid-assisted melem hydrothermal process, accompanied by freeze-drying and pyrolysis. The complex composed acid exhibiting unique 3D self-supporting skeleton significant phase transformation responsible formation interconnected framework HACN. These features are beneficial to enhance visible light harvesting multiple-reflection effect within architecture consisting more exposed porous nanosheets introducing long band tail absorption. well-designed morphology, state, doping effectively inhibit rapid band-to-band electrons holes facilitate subsequent separation. Accordingly, HACN catalyst exhibits exceptional (λ > 420 nm)-driven photoreduction hydrogen production rate 82.4 μmol h–1, which 21.7 9.5 times higher than those melem-derived crystalline nanotube counterparts, respectively, significantly surpasses most reported nitrides. Our controlling rearrangement in situ supramolecular self-assembly oligomer using directly instructs development highly efficient photocatalysts converting solar energy into fuel.

Language: Английский

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Synergistic effect of graphitic-like carbon nitride and sulfur-based thiazole-linked organic polymer heterostructures for boosting the photocatalytic degradation of pharmaceuticals in water

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152843 - 152843

Published: June 5, 2024

A sulfur-based COF has been combined with graphitic carbon nitride (CN) in microwave-assisted synthesis to build a COF-CN heterostructure enhanced photocatalytic activity. The prepared were fully characterized, analyzing the textural (N2 isotherms), structural (XRD and FTIR), chemical (elemental analysis XPS), morphological (HR-STEM), optical (DRS-UV–Vis photoluminescence) electrochemical properties (EIS impedance, transient photocurrent, flat band potential). Different COF-to-CN ratios (5–25 % of COF, wt.) explored, defining proportion (20 %) that led optimum activity for oxidation organic contaminants emerging concern (CECs) due an separation photogenerated charges lower bandgap value, 2.55 vs. 2.35 eV. performance was further tested other CECs, demonstrating its benefits comparison bare CN. materials displayed acceptable reusability stability. mechanism activation highlights importance played by superoxide radicals holes.

Language: Английский

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S‐Modified Graphitic Carbon Nitride with Double Defect Sites For Efficient Photocatalytic Hydrogen Evolution

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 3, 2024

Abstract Graphitic carbon nitride (gC 3 N 4 ) is an attractive photocatalyst for solar energy conversion due to its unique electronic structure and chemical stability. However, gC generally suffers from insufficient light absorption rapid compounding of photogenerated charges. The introduction defects atomic doping can optimize the improve carrier separation efficiency. Herein, high efficiency photocatalysis hydrogen evolution in visible achieved by S‐modified double‐deficient site strategy. Defect engineering forms abundant unsaturated sites cyano (─C≡N), which promotes strong interlayer C─N bonding interactions accelerates charge transport . S tunes semiconductors, formation C─S─C bonds optimizes electron‐transfer paths bonding, enhances light. Meanwhile,C≡N acts as electron trap capture photoexcited electrons, providing active reduction H + hydrogen. photocatalytic SDCN (1613.5 µmol g −1 h 31.5 times higher than that pristine MCN (51.2 ). situation transfer mechanism photocatalysts are investigated detail a combination experimental theoretical calculations.

Language: Английский

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Modification optimization and application of graphitic carbon nitride in photocatalysis: Current progress and future prospects

Chemical Engineering Science, Journal Year: 2024, Volume and Issue: 296, P. 120245 - 120245

Published: May 17, 2024

Language: Английский

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