Olefin‐Linked Covalent Organic Frameworks with Electronegative Channels as Cationic Highways for Sustainable Lithium Metal Battery Anodes DOI Open Access
Zhongping Li,

Linhai Sun,

Lipeng Zhai

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(37)

Published: July 25, 2023

Despite the enormous interest in Li metal as an ideal anode material, uncontrollable dendrite growth and unstable solid electrolyte interphase have plagued its practical application. These limitations can be attributed to sluggish uneven Li+ migration towards surface. Here, we report olefin-linked covalent organic frameworks (COFs) with electronegative channels for facilitating selective transport. The triazine rings fluorinated groups of COFs are introduced electron-rich sites capable enhancing salt dissociation guiding uniform flux within channels, resulting a high transference number (0.85) ionic conductivity (1.78 mS cm-1 ). mixed polymeric binder form matrix membranes. membranes enable reliable plating/stripping cyclability over 700 h Li/Li symmetric cells stable capacity retention Li/LiFePO4 cells, demonstrating potential viable cationic highway accelerating conduction.

Language: Английский

Covalent Organic Frameworks for Energy Conversion in Photocatalysis DOI Open Access
Ting He,

Yanli Zhao

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(34)

Published: April 24, 2023

Abstract Intensifying energy crises and severe environmental issues have led to the discovery of renewable sources, sustainable conversion, storage technologies. Photocatalysis is a green technology that converts eco‐friendly solar into high‐energy chemicals. Covalent organic frameworks (COFs) are porous materials constructed by covalent bonds show promising potential for converting chemicals owing their pre‐designable structures, high crystallinity, porosity. Herein, we highlight recent progress in synthesis COF‐based photocatalysts applications water splitting, CO 2 reduction, H O production. The challenges future opportunities rational design COFs advanced discussed. This Review expected promote further development toward photocatalysis.

Language: Английский

Citations

159
Research Progress in Donor−Acceptor Type Covalent Organic Frameworks DOI Open Access
Yeqing Xia, Weifeng Zhang, Shuai Yang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(48)

Published: April 24, 2023

Covalent organic frameworks (COFs) are new porous materials constructed by covalent bonds, with the advantages of pre-designable topology, adjustable pore size, and abundant active sites. Many research studies have shown that COFs exhibit great potential in gas adsorption, molecular separation, catalysis, drug delivery, energy storage, etc. However, electrons holes intrinsic COF prone to compounding transport, carrier lifetime is short. The donor-acceptor (D-A) type COFs, which synthesized introducing D A units into backbone, combine separated electron hole migration pathway, tunable band gap optoelectronic properties D-A polymers unique made progress related recent years. Here, synthetic strategies first outlined, including rational design linkages as well functionalization approaches. Then applications catalytic reactions, photothermal therapy, electronic systematically summarized. In final section, current challenges, directions for development presented.

Language: Английский

Citations

105
Isomeric Oligo(Phenylenevinylene)‐Based Covalent Organic Frameworks with Different Orientation of Imine Bonds and Distinct Photocatalytic Activities DOI Open Access
Wenbo Dong,

Zhiying Qin,

Kuixing Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(5)

Published: Dec. 1, 2022

Imine-linked covalent organic frameworks (COFs) have been extensively studied in photocatalysis because of their easy synthesis and excellent crystallinity. The effect imine-bond orientation on the photocatalytic properties COFs, however, is still rarely studied. Herein, we report two novel COFs with different orientations imine bonds using oligo(phenylenevinylene) moieties. showed similar structures but great differences photoelectric properties. COF-932 demonstrated a superior hydrogen evolution performance compared to COF-923 when triethanolamine was used as sacrificial agent. Interestingly, use ascorbic acid led protonation further altering direction electron transfer. performances were increased 23.4 0.73 mmol g-1 h-1 for protonated COF-932, respectively. This study provides clear strategy design imine-linked COF-based photocatalysts advances development COFs.

Language: Английский

Citations

86
Reversing Free‐Electron Transfer of MoS2+x Cocatalyst for Optimizing Antibonding‐Orbital Occupancy Enables High Photocatalytic H2 Evolution DOI Open Access
Duoduo Gao,

Pinsi Deng,

Jianjun Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(25)

Published: April 25, 2023

The interaction between a co-catalyst and photocatalyst usually induces spontaneous free-electron transfer them, but the effect regulation of direction on hydrogen-adsorption energy active sites have not received attention. Herein, to steer in favorable for weakening S-Hads bonds sulfur-rich MoS2+x , an electron-reversal strategy is proposed first time. core-shell Au@MoS2+x cocatalyst was constructed TiO2 optimize antibonding-orbital occupancy. Research results reveal that embedded Au can reverse electron generate electron-rich S(2+δ)- sites, thus increasing occupancy cocatalyst. Consequently, increase effectively destabilizes H 1s-p antibonding orbital weakens bond, realizing expedited desorption Hads rapidly lot visible H2 bubbles. This work delves deep into latent carrier cocatalytic activity.

Language: Английский

Citations

78
S-scheme regulated Ni2P-NiS/twinned Mn0.5Cd0.5S hetero-homojunctions for efficient photocatalytic H2 evolution DOI
Qiqi Zhang, Zhen Wang, Yuhang Song

et al.

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 169, P. 148 - 157

Published: July 18, 2023

Language: Английский

Citations

69
Strategic design of covalent organic frameworks (COFs) for photocatalytic hydrogen generation DOI
Kamal Prakash, Bikash Mishra, David Díaz Díaz

et al.

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(27), P. 14489 - 14538

Published: Jan. 1, 2023

Covalent organic frameworks provide a platform for the integration of functional linkers into ordered yet tunable two-dimensional to yield π–π stacked conjugated materials photocatalytic water splitting hydrogen generation.

Language: Английский

Citations

65
Covalent organic frameworks in heterogeneous catalysis: recent advances and future perspective DOI
Ziad Alsudairy,

Normanda Brown,

Allea Campbell

et al.

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(16), P. 3298 - 3331

Published: Jan. 1, 2023

This review provides an overview of the recent advances in heterogeneous catalysis using COFs, primarily from 2020 to 2023, covering fundamentals, advantages, current challenges, and future perspectives.

Language: Английский

Citations

64
Structural Regulation of Photocatalyst to Optimize Hydroxyl Radical Production Pathways for Highly Efficient Photocatalytic Oxidation DOI Open Access

Liujun Yang,

Zhengxi Chen,

Qiang Cao

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Oct. 22, 2023

Ring-opening of phenol in wastewater is the pivotal step photocatalytic degradation. The highly selective generation catalytical active species (•OH) to facilitate this process presents a significant scientific challenge. Therefore, novel approach for designing photocatalysts with single-atom containment metal-covalent organic frameworks (M-COFs) proposed. selection imine-linked COFs containing abundant N and O-chelate sites provides solid foundation anchoring metal atom. These dispersed atom possess rapid accumulation transfer capabilities photogenerated electrons, while periodic π-conjugated structure 2D-COFs establishes an effective platform. Additionally, Lewis acid properties imine bonds can enhance adsorption capacity toward gases base properties, such as O

Language: Английский

Citations

64
Structural Motifs in Covalent Organic Frameworks for Photocatalysis DOI

Liyang Qin,

Chengdi Ma,

Jian Zhang

et al.

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

Published: March 10, 2024

Abstract Covalent organic frameworks (COFs) attract significant attention due to their ordered, crystalline, porous, metal‐free, and predictable structures. These unique characteristics offer great opportunities for the diffusion transmission of photogenerated charges during photocatalysis. Currently, a considerable number COFs are used as metal‐free semiconductor photocatalysts. This review aims understand relationships between structure photocatalysis performance provides in‐depth insight into synthetic strategy improve performance. Subsequently, focuses on structural motif in sustainable photocatalytic hydrogen evolution, carbon dioxide reduction, peroxide generation, compound transformations. Last, conjunction with progress achieved challenges yet be overcome, candid discussion is undertaken regarding field COF photocatalysis, accompanied by presentation potential research avenues future directions. seeks provide readers comprehensive understanding pivotal role robust guidance innovative utilization

Language: Английский

Citations

61
Construction of a 2D/2D Crystalline Porous Materials Based S‐Scheme Heterojunction for Efficient Photocatalytic H2 Production DOI Creative Commons

Haijun Hu,

Xinyu Zhang, Kailai Zhang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 7, 2024

Abstract Generally, the low electron–hole separation efficiency of covalent organic frameworks (COFs) prevents their catalytic performance from reaching satisfactory results. For this reason, creation heterojunctions is considered an effective strategy but usually suffers dimensional mismatch integrated material, even at expense its redox capacity. To overcome these difficulties, a novel 2D/2D S‐scheme heterojunction between H 2 N–Cu–MOF (NCM) and TpPa–1–COF (TP1C) successfully constructed for efficient photocatalytic production. The matching dimensions two crystalline porous materials enables with abundant surface reactive sites, strong interaction optimized electronic structure. Moreover, combination can also form S–scheme heterojunction, which not only promote pair, preserve ability, thus remarkably boosting competence. Consequently, rate optimal 20% NCM/TP1C in production reaches 4.19 mmol g −1 h , 46.5 times higher than that bare NCM, 22.1 folds over pure TP1C. This research offers innovative perspective formation based on crystal solar energy utilization.

Language: Английский

Citations

54