TiO2-based S-scheme photocatalysts for solar energy conversion and environmental remediation

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 424 - 443

Published: Jan. 23, 2024

Language: Английский

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Built-in electric field mediated S-scheme high-quality charge separation in BiVO4/NiAl-LDH heterojunction for highly efficient photocatalytic degradation of antibiotics

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 176572 - 176572

Published: Sept. 1, 2024

Language: Английский

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Molecular Imprinting Technology Enables Proactive Capture of Nitrogen for Boosted Ammonia Synthesis under Ambient Conditions

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(51)

Published: Aug. 9, 2023

Electrochemical nitrogen reduction reaction (NRR) is a burgeoning field for green and sustainable ammonia production, in which numerous potential catalysts emerge endlessly. However, satisfactory performances are still not realized under practical applications due to the limited solubility sluggish diffusion of at interface. Herein, molecular imprinting technology adopted construct an adlayer with abundant imprints on electrocatalyst, capable selectively recognizing proactively aggregating high-concentrated interface while hindering access overwhelming water simultaneously. With this favorable microenvironment, can preferentially occupy active surface, NRR equilibrium be positively shifted facilitate kinetics. Approximately threefold improvements both production rate (185.7 µg h-1 mg-1 ) Faradaic efficiency (72.9%) achieved by metal-free catalyst compared bare one. It believed that strategy should general method find further applicability or even other reactions facing similar challenges.

Language: Английский

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One-dimensional covalent organic frameworks with atmospheric water harvesting for photocatalytic hydrogen evolution from water vapor

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 338, P. 123074 - 123074

Published: July 7, 2023

Language: Английский

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Comprehensive understanding of the thriving electrocatalytic nitrate/nitrite reduction to ammonia under ambient conditions

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 92, P. 459 - 483

Published: Jan. 4, 2024

Language: Английский

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Donor‐Site‐Acceptor Covalent Organic Frameworks Enable Spontaneous Nitrogen Dissociation for Boosted Photoelectrochemical Ammonia Synthesis

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(24)

Published: Feb. 5, 2024

Abstract Photoelectrochemical (PEC) technology offers new opportunities for pushing the renewable energy‐driven ammonia synthesis toward a practical level, while still facing unsatisfactory efficiency due to obstacle of dissociating inert nitrogen triple‐bonds. Herein, novel donor‐site‐acceptor system is constructed in covalent organic frameworks tackle this challenge highly efficient PEC synthesis. Highly active boron site elaborately embedded between donor and acceptor units, which can be effectively activated with continuous electron flow upon photoexcitation. With assistance solar irradiation, stubborn dissociation successfully changed from passive endothermic reaction spontaneous exothermic process, completely eliminating energy barrier rate‐determining step facilitating overall kinetics. The proof‐of‐concept achieved an excellent NRR performance remarkable Faradaic 91.6%, reaching target set by U.S. Department Energy (90%).

Language: Английский

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One‐Dimensional Covalent Organic Framework‐Based Multilevel Memristors for Neuromorphic Computing

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: March 21, 2024

Abstract Memristors are essential components of neuromorphic systems that mimic the synaptic plasticity observed in biological neurons. In this study, a novel approach employing one‐dimensional covalent organic framework (1D COF) films was explored to enhance performance memristors. The unique structural and electronic properties two 1D COF (COF‐4,4′‐methylenedianiline (MDA) COF‐4,4′‐oxydianiline (ODA)) offer advantages for multilevel resistive switching, which is key feature computing applications. By further introducing TiO 2 layer on COF‐ODA film, built‐in electric field between COF‐TiO interfaces could be generated, demonstrating feasibility utilizing COFs as platform constructing memristors with tunable states. nanochannels these structures contributed efficient modulation electrical conductance, enabling precise control over weights circuits. This study also investigated potential COF‐based achieve energy‐efficient high‐density memory devices.

Language: Английский

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Recent progress on covalent organic frameworks and their composites as electrode materials for supercapacitors

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 8(1)

Published: Dec. 26, 2024

Language: Английский

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Donor–acceptor hetero[6]radialene-based three-dimensional covalent organic frameworks for organic pollutant adsorption, photocatalytic degradation, and hydrogen production activity

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(23), P. 14005 - 14021

Published: Jan. 1, 2024

By investigating the effects of electron donor topology and hetero[6]radialene structure on 3D COF photocatalytic activity, a twisted BF was found to improve organic pollutant degradation water hydrogen production.

Language: Английский

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Decoration of viscose fibers with silver nanoparticle-based titanium-organic framework for use in environmental applications

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(9), P. 13185 - 13206

Published: Jan. 19, 2024

Abstract To effectively remove pharmaceuticals, nitroaromatic compounds, and dyes from wastewater, an efficient multifunctional material was created based on silver nanoparticles (Ag) MIL-125-NH 2 (MOF) immobilized viscose fibers (VF) as a support substrate. Firstly, were the surface of via in situ synthesis using trisodium citrate (TSC) reducing agent to create (VF-Ag). Then, VF VF-Ag decorated with titanium metal–organic framework VF-MOF VF-Ag-MOF. The influence VF-Ag, VF-MOF, VF-Ag-MOF sonocatalytic or sonophotocatalytic degradation sulfa drugs investigated. results show that showed excellent activity towards compared VF-MOF. Furthermore, sonophotodegradation dramatic enhancement efficiency sonodegradation. percentage sulfanilamide, sulfadiazine, sulfamethazine presence 65, 90, 95 after 45 min ultrasonic visible light irradiation. catalytic evaluated through conversion p-nitrophenol (4-NP) p-aminophenol (4-AP). demonstrate had highest activity, followed by 4-NP 4-AP 69%. photocatalytic effects elimination methylene blue (MB) dye high removing MB reduction (65%) photodegradation (71%) 60 min. composites structure–activity relationships represent doping within NPs enhanced , which could be explained follows: (i) Due formation Schottky barrier at junction between Ag NPs, photogenerated electrons conduction band supposed quickly transferred valence subsequently, NPs. This considerable electron transferring process, is reported Z scheme heterojunction, can efficiently suppress recombination electron/hole pairs VF-Ag-MIL-125-NH composites. (ii) Sufficient separation charge carriers (holes electrons) avoiding their

Language: Английский

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