Covalent organic frameworks for photocatalysis: Synthesis, structural features, fundamentals and performance

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214889 - 214889

Published: Oct. 15, 2022

Language: Английский

---

Metalated covalent organic frameworks: from synthetic strategies to diverse applications

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(15), P. 6307 - 6416

Published: Jan. 1, 2022

This review highlights the recent advances of metalated covalent organic frameworks, including synthetic strategies and applications, discusses current challenges future directions.

Language: Английский

---

Designing covalent organic frameworks with Co-O4 atomic sites for efficient CO2 photoreduction

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

Published: Feb. 28, 2023

Abstract Cobalt coordinated covalent organic frameworks have attracted increasing interest in the field of CO 2 photoreduction to CO, owing their high electron affinity and predesigned structures. However, achieving conversion efficiency is challenging since most Co related coordination environments facilitate fast recombination photogenerated electron-hole pairs. Here, we design two kinds Co-COF catalysts with oxygen atoms find that after tuning environment, reported framework catalyst Co-O 4 sites exhibits a production rate 18000 µmol g −1 h selectivity as 95.7% under visible light irradiation. From in/ex-situ spectral characterizations theoretical calculations, it revealed significantly carrier migration matrixes inhibit pairs photocatalytic process. This work opens way for high-performance photoreduction.

Language: Английский

---

Covalent Organic Framework Based Functional Materials: Important Catalysts for Efficient CO₂Utilization

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(15)

Published: Jan. 21, 2022

As hot topics in the chemical conversion of CO2 , photo-/electrocatalytic reduction and use as a supporter for energy storage have shown great potential utilization . However, many obstacles still exist on road to realizing highly efficient conversion, such inefficient uptake/activation mass transport catalysts. Covalent organic frameworks (COFs), kind porous material, been widely explored catalysts owing their unique features. In particular, COF-based functional materials containing diverse active sites (such single metal sites, nanoparticles, oxides) offer storage. This Minireview discusses recent breakthroughs basic knowledge, mechanisms, pathways strategies that addition, challenges prospects are also introduced.

Language: Английский

---

Constitutional isomerism of the linkages in donor–acceptor covalent organic frameworks and its impact on photocatalysis

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Oct. 23, 2022

When new covalent organic frameworks (COFs) are designed, the main efforts typically focused on selecting specific building blocks with certain geometries and properties to control structure function of final COFs. The nature linkage (imine, boroxine, vinyl, etc.) between these naturally also defines their properties. However, besides type, orientation, i.e., constitutional isomerism linkages, has rarely been considered so far as an essential aspect. In this work, three pairs constitutionally isomeric imine-linked donor-acceptor (D-A) COFs synthesized, which different in orientation imine bonds (D-C=N-A (DCNA) D-N=C-A (DNCA)). isomers show substantial differences photophysical consequently photocatalytic performance. Indeed, all DCNA enhanced H2 evolution performance than corresponding DNCA Besides shown here, it can be concluded that proposed concept linkages is quite universal should when designing tuning

Language: Английский

---

Photoelectron Transfer Mediated by the Interfacial Electron Effects for Boosting Visible-Light-Driven CO₂ Reduction

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(6), P. 3550 - 3557

Published: March 4, 2022

Imine-linked covalent organic frameworks (COFs) are popular candidates for photocatalytic CO2 reduction, but high polarization of the imine bond is less efficient π-electron delocalization between linked building units, leading to low intramolecular electron transfer and poor efficiency. Herein, we present a structural electronic engineering strategy through integrating imine-linked COF consisting Zn–porphyrin Co–bipyridyl units with cadmium sulfide (CdS) nanowires form CdS@COF core–shell structure. The experimental theoretical results have validated that CdS serves as channel interfacial effects, which induces photoelectron from subsequent injection into reduction. as-prepared generates 4057 μmol g–1 CO in 8 h under visible-light irradiation, considerably higher than those its neat counterparts. This work provides protocols tackle charge across polar linkages photosensitizers active sites solar-to-chemical energy conversion.

Language: Английский

---

Recent Advances in the Use of Covalent Organic Frameworks as Heterogenous Photocatalysts in Organic Synthesis

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(24)

Published: Dec. 23, 2022

Abstract Organic photochemistry is intensely developed in the 1980s, which nature of excited electronic states and energy electron transfer processes are thoroughly studied finally well‐understood. This knowledge from molecular organic can be transferred to design covalent frameworks (COFs) as active visible‐light photocatalysts. COFs constitute a new class crystalline porous materials with substantial application potentials. Featured outstanding structural tunability, large porosity, high surface area, excellent stability, unique photoelectronic properties, potential candidates various research areas (e.g., photocatalysis). review aims provide state‐of‐the‐art insights into COF photocatalysts (pristine, functionalized, hybrid COFs) for transformations. The catalytic reaction mechanism COF‐based influence dimensionality crystallinity on heterogenous photocatalysis performance also discussed, followed by perspectives prospects main challenges opportunities future

Language: Английский

---

Advances of MOFs and COFs for photocatalytic CO2 reduction, H2 evolution and organic redox transformations

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 490, P. 215210 - 215210

Published: May 21, 2023

Language: Английский

---

WO3–based photocatalysts: A review on synthesis, performance enhancement and photocatalytic memory for environmental applications

Ceramics International, Journal Year: 2021, Volume and Issue: 48(5), P. 5845 - 5875

Published: Nov. 27, 2021

Language: Английский

---

Z-scheme systems: From fundamental principles to characterization, synthesis, and photocatalytic fuel-conversion applications

Physics Reports, Journal Year: 2022, Volume and Issue: 983, P. 1 - 41

Published: Aug. 6, 2022

Language: Английский

---