Phenanthrenequinone‐Modified Conjugated Polymer Enabling Photocatalytic H₂O₂ Generation via Efficient O₂⁻ Conversion

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract The photocatalytic O 2 reduction reaction offers a promising approach to synthesizing H . Nevertheless, the low conversion efficiency of − constrains production. This is because can readily obtain electrons generate , but it challenging reacquire after generating Accordingly, this study proposes improvement through directional enrichment photogenerated charges at sites and stabilization introduces phenanthrenequinone group with adjacent carbonyl groups as site. site enhances probability obtaining electrons. Concurrently, special adsorption configuration adsorption, stabilizes·O on catalyst surface, accelerating achieving an generation rate 3400 µmol g −1 h work presents innovative tactic regarding efficient which informs structural design advanced systems for production

Language: Английский

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Engineering of Single‐Atomic Sites for Electro‐ and Photo‐Catalytic H₂O₂ Production

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Direct electro- and photo-synthesis of H

Language: Английский

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Oxygen Modulation by Ni Metal Sites in Resorcinol‐Formaldehyde Resins for Boosted Photocatalytic H₂O₂ Production From Pure Water

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Abstract Utilizing polymeric catalysts to generate hydrogen peroxide (H 2 O ) via photocatalysis for various industrial applications is a promising avenue, but the application potential constrained by their low charge separation efficiency and capacity oxygen adsorption activation. Herein, catalyst (NiRF) modified with Ni metal sites on resorcinol‐formaldehyde (RF) resin presented, which can efficiently produce H through in pure water. The optimal NiRF‐5 exhibits an impressive generation rate of up 31.75 m g −1 h under visible light irradiation, significantly outperforming most reported date. Experimental results coupled theoretical calculations simulation, indicate that incorporation nickel ions modulates band structure NiRF provides active conducive transformation oxygen. regulate ensure suitable configuration energy. This work novel design concept RF‐based photocatalysts offers approach development methods efficient photocatalytic production .

Language: Английский

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Hydroxyl combined with nitrogen on biomass carbon promotes the electrocatalytic H\(_{2}\)O\(_{2}\) selectivity

Journal of Metals Materials and Minerals, Journal Year: 2025, Volume and Issue: 35(1), P. e2216 - e2216

Published: Feb. 22, 2025

Elevating the selectivity of two-electron oxygen reduction reaction (2e‒ ORR) is challenging. Herein, hydroxyl combined with nitrogen on biomass carbon exhibits a high H2O2 over wide potential range 0 V to 0.5 vs. RHE, which nearly 97% at 0.3 RHE. The combination and improves adsorption desorption intermediates, finally changing pathway promoting 2e‒ ORR. Faradaic efficiency (FE) reaches 98% Furthermore, typical organic pollutants were degraded site in flow cell. This work illustrates

Language: Английский

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Rational Fabrication of a Robust, Exfoliatable Catechol‐Porphyrin Covalent Network for Enhanced H₂O₂ Photosynthesis

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Covalent organic frameworks (COFs) containing dioxin‐linkages are highly valued for their exceptional chemical stability, which is essential practical use. However, research on dioxin‐based COFs remains limited. Herein, a unique nonplanar 2D COF, designated as TCP‐COF, constructed from catechol‐porphyrin units interconnected by 1,4‐dioxin bonds, exhibiting staggered AAA stacking pattern, presented. Remarkably, TCP‐COF can undergo in situ exfoliation to produce ultrathin nanosheets when it utilized photocatalyst hydrogen peroxide (H 2 O ) generation water and air, without the need additives. This process primarily driven distortion of porphyrin weak π – interaction between adjacent layers TCP‐COF. The resultant significantly reinforce catalytic activity, achieving photocatalytic H production rate 3077 µmol g −1 h . mechanism underlying photosynthesis further explored through combination experimental analyses theoretical calculations. study provides valuable insights development efficient COF‐based photocatalysts evolution.

Language: Английский

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Mechanical and Light Activation of Materials for Chemical Production

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

Published: March 12, 2025

Abstract Mechanical expansion and contraction of pores within photosynthetic organisms regulate a series processes that are necessary to manage light absorption, control gas exchange, water loss. These pores, known as stoma, allow the plant maximize output depending on environmental conditions such intensity, humidity, temperature by actively changing size stomal opening. Despite advances in artificial systems, little is about effect mechanical actuation synthetic materials where chemical reactions occur. It reported here hybrid hydrogel combines light‐activated supramolecular polymers for superoxide production with thermal covalent polymer. Superoxide important organic synthesis remediation, potential precursor hydrogen peroxide liquid fuel. shown closing results substantial decrease photocatalysis, but cycles swollen contracted states enhance photocatalysis. The observations motivate development biomimetic integrate large scale motion reactions.

Language: Английский

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Efficient H₂O₂ Production through a Dual-Channel Pathway on a Novel Organic–Inorganic Hybrid Piezocatalyst

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Piezocatalysis is a promising and ecofriendly technology for hydrogen peroxide (H2O2) synthesis, yet its efficiency hindered by limited active sites poor electron-hole utilization. Herein, guided theoretical calculations, novel organic-inorganic hybrid piezocatalyst with abundant full utilization of electron-holes was rationally designed the overall synthesis H2O2. Results illustrated that organic component (cobalt phthalocyanine, CoPc) switched H2O2 inorganic (BiOIO3, BIO) from single-channel two-electron water oxidation reaction (2e- WOR) to an efficient dual-channel pathway. Specifically, Co metal centers boosted O2 adsorption activation coupling O 2p orbitals, enabling 2e- oxygen reduction reaction. Additionally, CoPc hybridization increased piezoresponse, further facilitating WOR on BIO. The optimal sample achieved exceptional yield 751.2 μmol g-1 h-1 in pure water/air exhibited excellent degradation refractory micropollutants. Our work introduces strategy facilitates advancement sustainable purification technologies.

Language: Английский

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Cascade Production of In Situ Oxygen and Singlet Oxygen from Self-Assembled Nanophotosensitizer for Anti-Hypoxic Photodynamic Therapy

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Photosensitizers (PSs) capable of in situ oxygen (O2) production are attractive for overcoming hypoxia photodynamic therapy (PDT). However, these PSs generally require multiple components and complex fabrication procedures, preventing their clinical translation. Herein, we develop a single-component nanophotosensitizer via simple self-assembly that enables cascade O2 singlet (1O2) superior antibacterial PDT (aPDT). Perylene tetracarboxylic acid (PTA) molecules self-assemble into nanophotosensitizers (PTA NPs). Mechanism studies reveal dual functionality PTA NPs due to antiparallel-displaced π-π stacking. Aggregated undergo intermolecular electron transfer yield substantial photogenerated holes, while unimolecular undergoes intersystem crossing produce triplet PS (3PS*). These holes effectively oxidize water situ, which then participates downstream photosensitization with 3PS* 1O2. This reaction affords continuous supply efficient 1O2 production, enabling 63.07% higher rate compared the antibiotic vancomycin.

Language: Английский

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Structural design and property regulation of organic polymers for photocatalytic synthesis of H₂O₂

InfoScience., Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Hydrogen peroxide (H 2 O ), an environmentally benign oxidizer, finds extensive applications in pulp bleaching, wastewater treatment, and medical sterilization. Photocatalytic H synthesis via water oxygen activation on semiconductor surfaces presents a sustainable production strategy. Notably, structurally tunable organic photocatalysts have emerged as promising candidates, which targeted molecular engineering can boost the photocatalytic performance by enlarging specific surface areas, extending light absorption ranges, facilitating charge carrier transport‐separation dynamics. Given growing significance of synthesis, comprehensive review this field has become imperative. This paper offers systematic examination visible‐light‐driven using various photocatalysts, including graphitic carbon nitride (g‐C 3 N 4 resorcinol‐formaldehyde (RF) resin, covalent frameworks (COFs), linear conjugated polymers (LCPs). The focus lies fundamental mechanistic elucidation, design reaction pathways active sites, modification strategies, establishment efficient systems. Extensive studies correlated efficiency with interfacial electron transfer kinetics spatial separation. Therefore, we methodically analyze key determinants governing photogenerated dynamics present strategies for enhancement. Furthermore, discuss emerging application scenarios enabled generation. Importantly, critically evaluates persistent challenges cutting‐edge solutions visible‐light‐mediated ultimately providing principles developing high‐efficiency photocatalysts.

Language: Английский

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Engineering Piezoelectricity and Strain Sensitivity on Nanostructured Bi₂WO₆ for Piezocatalytic Hydrogen Peroxide Production

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Language: Английский

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