Post-synthetic modification of covalent organic frameworks for CO2 electroreduction

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 26, 2023

To achieve high-efficiency catalysts for CO2 reduction reaction, various catalytic metal centres and linker molecules have been assembled into covalent organic frameworks. The amine-linkages enhance the binding ability of molecules, ionic frameworks enable to improve electronic conductivity charge transfer along However, directly synthesis with is hardly achieved due electrostatic repulsion predicament strength linkage. Herein, we demonstrate reaction by modulating linkers linkages template framework build correlation between performance structures Through double modifications, states are well tuned, resulting in controllable activity selectivity reaction. Notably, dual-functional achieves high a maximum CO Faradaic efficiency 97.32% turnover frequencies value 9922.68 h-1, which higher than those base single-modified Moreover, theoretical calculations further reveal that attributed easier formation immediate *CO from COOH*. This study provides insights developing

Language: Английский

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2D MoN_1.2‐rGO Stacked Heterostructures Enabled Water State Modification for Highly Efficient Interfacial Solar Evaporation

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(24)

Published: March 14, 2023

Abstract Improving interfacial solar evaporation performance is crucial for the practical application of this technology in solar‐driven seawater desalination. Lowering enthalpy one most promising and effective strategies to significantly improve rate. In study, a new pathway lower vaporization by introducing heterogeneous interactions between hydrophilic hybrid materials water molecules developed. 2D MoN 1.2 nanosheets are synthesized integrated with rGO form stacked ‐rGO heterostructures massive junction interfaces evaporation. Molecular dynamics simulation confirms that atomic thick simultaneously interact molecules, while remarkably different. These cause an imbalanced state, which easily breaks hydrogen bonds leading dramatically lowered improved rate (2.6 kg m −2 h −1 ). This study provides strategy designing 2D‐2D regulate evaporate clean production.

Language: Английский

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NIR light-induced rapid self-healing hydrogel toward multifunctional applications in sensing

Nano Energy, Journal Year: 2022, Volume and Issue: 107, P. 108119 - 108119

Published: Dec. 26, 2022

Language: Английский

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Highly Crystalline Polyimide Covalent Organic Framework as Dual-Active-Center Cathode for High-Performance Lithium-Ion Batteries

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(51), P. 23534 - 23542

Published: Dec. 13, 2022

Polyimide covalent organic framework (PI-COF) materials that can realize intrinsic redox reactions by changing the charge state of their electroactive sites are considered as emerging electrode for rechargeable devices. However, highly crystalline PI-COFs with hierarchical porosity less reported due to rapid reaction between monomers and poor reversibility polyimidization reaction. Here, we developed a water-assistant synthetic strategy adjust rate polyimidization, PI-COF (COFTPDA-PMDA) kgm topology consisting dual active centers N,N,N′,N′-tetrakis(4-aminophenyl)-1,4-benzenediamine (TPDA) pyromellitic dianhydride (PMDA) ligands was successfully synthesized high crystallinity porosity. The COFTPDA-PMDA possesses micro-/mesoporous channels largest surface area (2669 m2/g) in PI-COFs, which promote Li+ ions bulky bis(trifluoromethanesulfonyl)imide (TFSI–) electrolyte sufficiently interact on COF skeleton increase specific capacity cathode materials. As material lithium-ion batteries, COFTPDA-PMDA@50%CNT integrated center carbon nanotubes via π–π interactions gave initial 233 mAh/g (0.5 A/g) maintains at 80 even current density 5.0 A/g after 1800 cycles.

Language: Английский

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Recent strategies for constructing efficient interfacial solar evaporation systems

Deleted Journal, Journal Year: 2023, Volume and Issue: 2, P. e9120062 - e9120062

Published: March 8, 2023

Interfacial solar evaporation (ISE) is a promising technology to relieve worldwide freshwater shortages owing its high energy conversion efficiency and environmentally sustainable potential. So far, many innovative materials evaporators have been proposed applied in ISE enable highly controllable efficient solar-to-thermal conversion. With rational design, can achieve excellent management for lowering loss, harvesting extra energy, efficiently utilizing the system improve production. Beyond that, strategy of reducing water vaporization enthalpy by introducing molecular engineering water-state regulation has also demonstrated as an effective approach boost ISE. Based on these, this article discusses nexus two-dimensional (2D) three-dimensional (3D) separately reviews strategies design fabrication systems. The summarized work offers significant perspectives guiding future systems with management, which pave pathways practical applications.

Language: Английский

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Topographic Manipulation of Graphene Oxide by Polyaniline Nanocone Arrays Enables High‐Performance Solar‐Driven Water Evaporation

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(7)

Published: Dec. 5, 2022

Abstract Tuning the surface topography of solar evaporators is significance for boosting light absorption and enhancing solar‐to‐vapor efficiency. Herein, a novel strategy to manipulate graphene oxide (GO) via electrostatic assembly coupled with in situ polymerizations aniline reported. The GO fully hybridized polyaniline (PANI) nanocone arrays, manifesting periodic structures highly foldable configurations. Additionally, PANI arrays tune chemistry retard redispersion into water, thus enabling corresponding composite (PG) robust structural durability. Featuring these intriguing attributes, when applied as an evaporator pure PG delivers improved evaporation performance 1.42 kg m −2 h −1 high efficiency 96.6% under one sun illumination. Further investigations reveal that periodically conical over strengthen multiple reflections facilitate heat localization. Desalination test substantiates reliability practical freshwater production. numerical simulations optical microscopy observation exhibit topography‐strengthened vapor generation effect. This study sheds new on rational manipulation photothermal materials high‐efficiency evaporation.

Language: Английский

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Nano-enabled solar driven-interfacial evaporation: Advanced design and opportunities

Nano Research, Journal Year: 2023, Volume and Issue: 16(5), P. 6015 - 6038

Published: March 22, 2023

Language: Английский

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Recent research advances in efficient solar-driven interfacial evaporation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151157 - 151157

Published: April 10, 2024

Language: Английский

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Non‐Interpenetrated 3D Covalent Organic Framework with Dia Topology for Au Ions Capture

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: April 23, 2023

Abstract The 3D covalent organic frameworks (COFs) have attracted considerable attention owing to their unique structural characteristics. However, most of COFs interpenetration phenomena, which will result in decreased surface area and porosities, thus limited applications molecular/gas capture. Developing with non‐fold is challenging but significant because the existence non‐covalent interactions between adjacent nets. Herein, a new COF (BMTA‐TFPM‐COF) dia topology for Au ion capture first demonstrated. constructed exhibits high Brunauer–Emmett–Teller 1924 m 2 g −1 , pore volume 1.85 cm 3 . abundant cavities as well exposed CN linkages due non‐interpenetration enable absorb 3+ capacity (570.18 mg ), selectivity (99.5%), efficiency (68.3% adsorption maximum 5 min). This work provides strategy design

Language: Английский

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Bioinspired, Sustainable, High‐Efficiency Solar Evaporators for Sewage Purification

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(47)

Published: Sept. 3, 2023

Abstract To alleviate the severe water crisis, an interfacial solar evaporator provides a promising method to produce freshwater. Although many superior evaporators present high evaporation rates by reducing enthalpy, adapting sustainable materials construct high‐efficiency remains challenging. Herein, inspired corncob pith's structure and functional groups, interconnected porous cellulose hydrogel is proposed crosslinking hydroxypropyl cellulose. Benefiting from abundant hydroxy group, pith/carbon nanotubes (CNTs) hydrogel/CNTs show low enthalpy of 880.5 ± 42.1 1280.7 57.8 J g −1 due reduced hydrogen bond numbers between molecules enable 3.06 2.56 kg m −2 h , respectively. Moreover, purification performance for seawater sewage, excellent anti‐biological fouling properties under light irradiation. It anticipated that bionic strategy would provide in‐depth understanding designing next‐generation in framework dual‐carbon concept.

Language: Английский

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