Recent advances in semiconductor heterojunctions: a detailed review of the fundamentals of photocatalysis, charge transfer mechanism and materials DOI Creative Commons
Aniket Balapure, Jayati Ray Dutta, Ramakrishnan Ganesan

et al.

RSC Applied Interfaces, Journal Year: 2023, Volume and Issue: 1(1), P. 43 - 69

Published: Sept. 27, 2023

Semiconductor heterojunctions are pivotal in determining the overall photocatalytic efficiency. This review explores recent advances diverse heterojunction types, charge transfer mechanisms and materials.

Language: Английский

Photocatalytic Molecular Oxygen Activation by Regulating Excitonic Effects in Covalent Organic Frameworks DOI
Yunyang Qian, Dandan Li, Yulan Han

et al.

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(49), P. 20763 - 20771

Published: Nov. 23, 2020

Excitonic effects caused by Coulomb interactions between electrons and holes play subtle significant roles on photocatalysis, yet have been long ignored. Herein, porphyrinic covalent organic frameworks (COFs, specifically DhaTph-M), in the absence or presence of different metals porphyrin centers, shown as ideal models to regulate excitonic effects. Remarkably, incorporation Zn2+ COF facilitates conversion singlet triplet excitons, whereas Ni2+ introduction promotes dissociation excitons hot carriers under photoexcitation. Accordingly, discriminative behavior DhaTph-Zn DhaTph-Ni enables activation O2 1O2 O2•–, respectively, visible light irradiation, resulting distinctly activity selectivity photocatalytic terpinene oxidation. Benefiting from these results, exhibits excellent O2•–-engaged hydroxylation boronic acid, while possesses superior performance 1O2-mediated selective oxidation sulfides. This work provides in-depth insights into molecular oxygen opens an avenue regulation based COFs.

Language: Английский

Citations

488
Regulating Photocatalysis by Spin-State Manipulation of Cobalt in Covalent Organic Frameworks DOI
Yun‐Nan Gong, Wenhui Zhong, Li Yang

et al.

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(39), P. 16723 - 16731

Published: Sept. 7, 2020

While catalysis is highly dependent on the electronic structure of catalyst, understanding catalytic performance affected by electron spin regulation remains challenging and rare. Herein, we have developed a facile strategy to manipulation cobalt state over covalent organic frameworks (COFs), COF-367-Co, simply changing oxidation Co centered in porphyrin. Density functional theory (DFT) calculations together with experimental results confirm that CoII CoIII are embedded COF-367 S = 1/2 0 ground states, respectively. Remarkably, photocatalytic CO2 reduction indicate COF-367-CoIII exhibits favorable activity significantly enhanced selectivity HCOOH, accordingly much reduced CO CH4, sharp contrast COF-367-CoII. The highlight spin-state transition greatly regulates performance. Theoretical further disclose presence COF-367-Co preferable formation HCOOH but detrimental its conversion, which clearly accounts for distinctly different photocatalysis To best our knowledge, this first report regulating COFs.

Language: Английский

Citations

471
Engineering Single-Atom Active Sites on Covalent Organic Frameworks for Boosting CO2 Photoreduction DOI
Lei Ran,

Zhuwei Li,

Bei Ran

et al.

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(37), P. 17097 - 17109

Published: Sept. 6, 2022

Solar carbon dioxide (CO2) conversion is an emerging solution to meet the challenges of sustainable energy systems and environmental/climate concerns. However, construction isolated active sites not only influences catalytic activity but also limits understanding structure-catalyst relationship CO2 reduction. Herein, we develop a universal synthetic protocol fabricate different single-atom metal (e.g., Fe, Co, Ni, Zn, Cu, Mn, Ru) anchored on triazine-based covalent organic framework (SAS/Tr-COF) backbone with bridging structure metal-nitrogen-chlorine for high-performance Remarkably, as-synthesized Fe SAS/Tr-COF as representative catalyst achieved impressive CO generation rate high 980.3 μmol g-1 h-1 selectivity 96.4%, over approximately 26 times higher than that pristine Tr-COF under visible light irradiation. From X-ray absorption fine analysis density functional theory calculations, superior photocatalytic performance attributed synergic effect atomically dispersed host, decreasing reaction barriers formation *COOH intermediates promoting adsorption activation well desorption. This work affords rational design state-of-the-art catalysts at molecular level provides in-depth insights efficient conversion.

Language: Английский

Citations

330
Covalent organic framework-based materials for energy applications DOI
Degao Wang,

Tianjie Qiu,

Wenhan Guo

et al.

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 14(2), P. 688 - 728

Published: Nov. 11, 2020

The recent progress in the synthesis and energy applications of covalent organic frameworks has been elaborated this review article.

Language: Английский

Citations

302
A review of material aspects in developing direct Z-scheme photocatalysts DOI
Xuan Li, Corrado Garlisi, Qiangshun Guan

et al.

Materials Today, Journal Year: 2021, Volume and Issue: 47, P. 75 - 107

Published: March 19, 2021

Language: Английский

Citations

283
Covalent organic frameworks for photocatalysis: Synthesis, structural features, fundamentals and performance DOI
Yun‐Nan Gong, Xinyu Guan, Hai‐Long Jiang

et al.

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

Published: Oct. 15, 2022

Language: Английский

Citations

251
Metalated covalent organic frameworks: from synthetic strategies to diverse applications DOI
Qun Guan, Lele Zhou, Yu‐Bin Dong

et al.

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

Citations

215
Integrating Bifunctionality and Chemical Stability in Covalent Organic Frameworks via One-Pot Multicomponent Reactions for Solar-Driven H2O2 Production DOI
Prasenjit Das,

Gouri Chakraborty,

Jérôme Roeser

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(5), P. 2975 - 2984

Published: Jan. 25, 2023

Multicomponent reactions (MCRs) can be used to introduce different functionalities into highly stable covalent organic frameworks (COFs). In this work, the irreversible three-component Doebner reaction is utilized synthesize four chemically quinoline-4-carboxylic acid DMCR-COFs (DMCR-1-3 and DMCR-1NH) equipped with an acid-base bifunctionality. These show superior photocatalytic H2O2 evolution (one of most important industrial oxidants) compared imine COF analogue (Imine-1). This achieved sacrificial oxidants but also in pure water under oxygen or air atmosphere. Furthermore, high photostability, durability, recyclability. MCR-COFs thus provide a viable materials' platform for solar chemical energy conversion.

Language: Английский

Citations

199
Removal of heavy metals by covalent organic frameworks (COFs): A review on its mechanism and adsorption properties DOI

Eman A. Gendy,

Jerosha Ifthikar, Jawad Ali

et al.

Journal of environmental chemical engineering, Journal Year: 2021, Volume and Issue: 9(4), P. 105687 - 105687

Published: May 18, 2021

Language: Английский

Citations

182
Chemically Robust Covalent Organic Frameworks: Progress and Perspective DOI Creative Commons
Xinle Li, Song‐Liang Cai, Bing Sun

et al.

Matter, Journal Year: 2020, Volume and Issue: 3(5), P. 1507 - 1540

Published: Nov. 1, 2020

Language: Английский

Citations

171