Plasma‐Enhanced Chemical‐Vapor‐Deposition Synthesis of Photoredox‐Active Nitrogen‐Doped Carbon from NH<sub>3</sub> and CH<sub>4</sub> Gases

Fang, Yuanxing; Wang, Yankun; Wu, Haisu; Anpo, Masakazu; Yu, Jimmy C.; Wang, Xinchen

doi:10.1002/anie.202307236

Cited by 14 publications

(2 citation statements)

References 42 publications

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“…The global XPS spectra (Figure S5) reveal C and N as the main elements in TCN-M, HCN-Me, and THCN-M 9 Me 1 . The high-resolution C 1s XPS spectra (Figure c) are deconvoluted into four peaks centered at binding energies (BEs) of 284.8, 286.4, 288.1, and 289.0 eV, assigned to the adventitious sp 2 hybridized C from the carbonaceous environment, CN–C in the aromatic heterocycles of the CN framework, – C–NH 2 /CN species, and C–O generated on the surface under thermal condensation in air, respectively. , In addition to these, TCN-M shows a characteristic shakeup line at a BE of 290.4 eV, corresponding to π–π* transition loss . The N 1s XPS spectra of all CN samples (Figure d) can be deconvoluted into three distinct peaks with BEs of 398.6, 399.8, and 401.0 eV, suggesting that the N species exist in the form of sp 2 -hybridized N in CN heterocycles (CN–C), tertiary nitrogen (N–(C) 3 ), and a marginal amino or cyano group (C–NH/CN), respectively .…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine–Heptazine Homojunction

Xia,

Mark,

Tong

et al. 2024

Inorg. Chem.

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Establishing homojunctions at the molecular level between different but physicochemically similar phases belonging to the same family of materials is an effective approach to promoting the photocatalytic activity of polymeric carbon nitride (CN) materials. Here, we prepared a CN material with a uniform distribution of homojunctions by combining two synthetic strategies: supramolecular assemblies as the precursor and molten salt as the medium. We designed porous CN rods with triazine–heptazine homojunctions (THCNs) using a melem supramolecular aggregate (Me) and melamine as the precursors and a KCl/LiBr salt mixture as the liquid reaction medium. The triazine/heptazine ratio is controlled by varying the relative amounts of the chosen precursors, and the molten salt treatment enhances the structural order of the interplanar packing units for the THCN skeleton, leading to rapid charge migration. The resulting built-in electric field induced by the triazine–heptazine homojunction enhances photogenerated charge separation; the optimal THCN catalyst exhibits an excellent H2 evolution rate via photocatalytic water splitting, which is ∼24 times as high as that of reference bulk CN, with long-term stability.

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Section: Resultsmentioning

confidence: 99%

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine–Heptazine Homojunction

Xia,

Mark,

Tong

et al. 2024

Inorg. Chem.

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“…In addition, couple photocatalytic system also is a novel exploration, which fully utilizes the redox sites of the photocatalysts to drive reactions and achieve high‐value utilization of common substances through light energy. Wang and his team synthesized photoredox‐active nitrogen‐doped carbon use gas phase precursors (CH 4 and NH 3 ) by PE‐CVD method, and the photocatalyst realized to generate H 2 O 2 and imine through photocatalytic reduction and amine oxidation, respectively 135,136 . However, the application of photocatalysts is still limited, requiring further development and research.…”

Section: Applicationmentioning

confidence: 99%

Layered double hydroxides‐based Z‐scheme heterojunction for photocatalysis

Ding,

Wang,

Zhang

et al. 2024

EcoEnergy

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Layered double hydroxides (LDHs)‐based photocatalysts have generated widespread interest owing to their great potential for solving both energy and environmental issues through directly converting nonconsumable solar energy. Numerous methods have been investigated and analyzed in recent years to promote the photocatalytic efficiency of LDHs. Z‐scheme heterojunction that mimics the artificial photosynthesis is employed in photocatalysis owing to the outstanding advantages, such as high quantum efficiency, separation of redox sites, and low recombination of photocarriers. Herein, various LDHs‐based Z‐scheme heterojunction photocatalysts are briefly reviewed. Z‐scheme heterojunction associated with LDHs‐based materials exhibit high photocatalysis performance, and these types of hybrids are applied in photocatalytic H2O splitting, CO2 reduction, and pollution degradation, which are introduced and summarized in detail. In the end, a brief conclusion focused on future challenges and expectations of LDH‐based Z‐scheme photocatalytic system is presented. We expect that more advances for LDH‐based Z‐scheme photocatalyst can be achieved in the field of photocatalysis in the coming days.

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Electrochemical Hydrogenation of Quinoline Enabled by Cu⁰‐Cu⁺ Dual Sites Coupled with Efficient Biomass Valorization in Aqueous Solution

Pan,

Bao,

Wang

et al. 2024

Adv Funct Materials

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The hydrogenation of nitrogen‐containing heterocyclic precursors in aqueous medium is challenging, especially at ambient temperature and pressure. Electrochemical hydrogenation (ECH) of quinoline to 1,2,3,4‐tetrahydroquinoline (THQ) at mild conditions using water as the hydrogen source is demonstrated with splendid activity on a Cu‐based nonprecicous catalyst. The yield of THQ is up to ≈100% with ≈100% selectivity at −1.275 V vs Hg/HgO. The real active sites and key intermediates are deciphered, where the Lewis acid‐base sites on the heterointerface of Cu/Cu2O are beneficial to the quinoline adsorption in a dual‐site coordination configuration and water dissociation to afford H*. The presence of Cu0 plays a vital role in inhibiting the binding of H*, which ensures good Faradaic efficiency. In addition, a novel co‐production system by coupling benzyl alcohol oxidation at the anode is established, achieving dual benefits in both energy utilization efficiency and economic benefits.

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Plasma‐Enhanced Chemical‐Vapor‐Deposition Synthesis of Photoredox‐Active Nitrogen‐Doped Carbon from NH₃ and CH₄ Gases

Cited by 14 publications

References 42 publications

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine–Heptazine Homojunction

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine–Heptazine Homojunction

Layered double hydroxides‐based Z‐scheme heterojunction for photocatalysis

Electrochemical Hydrogenation of Quinoline Enabled by Cu⁰‐Cu⁺ Dual Sites Coupled with Efficient Biomass Valorization in Aqueous Solution

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Plasma‐Enhanced Chemical‐Vapor‐Deposition Synthesis of Photoredox‐Active Nitrogen‐Doped Carbon from NH3 and CH4 Gases

Cited by 14 publications

References 42 publications

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine–Heptazine Homojunction

Enhancing the Activity of a Carbon Nitride Photocatalyst by Constructing a Triazine–Heptazine Homojunction

Layered double hydroxides‐based Z‐scheme heterojunction for photocatalysis

Electrochemical Hydrogenation of Quinoline Enabled by Cu0‐Cu+ Dual Sites Coupled with Efficient Biomass Valorization in Aqueous Solution

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Product

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Plasma‐Enhanced Chemical‐Vapor‐Deposition Synthesis of Photoredox‐Active Nitrogen‐Doped Carbon from NH₃ and CH₄ Gases

Electrochemical Hydrogenation of Quinoline Enabled by Cu⁰‐Cu⁺ Dual Sites Coupled with Efficient Biomass Valorization in Aqueous Solution