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
Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)
Published: April 29, 2022
Abstract Organic semiconductors offer a tunable platform for photocatalysis, yet the more difficult exciton dissociation, compared to that in inorganic semiconductors, lowers their photocatalytic activities. In this work, we report charge carrier lifetime is dramatically prolonged by incorporating suitable donor-acceptor (β-ketene-cyano) pair into covalent organic framework nanosheet. These nanosheets show an apparent quantum efficiency up 82.6% at 450 nm using platinum as co-catalyst H 2 evolution. Charge kinetic analysis and femtosecond transient absorption spectroscopy characterizations verify these modified have intrinsically lower binding energies longer-lived carriers than corresponding without unit. This work provides model gaining insight nature of short-lived active species polymeric photocatalysts.
Language: Английский
Citations
296
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Feb. 27, 2023
Covalent organic frameworks (COFs) represent an emerging class of photocatalysts. However, their complicated structures lead to indeterminacy about photocatalytic active sites and reaction mechanisms. Herein, we use reticular chemistry construct a family isoreticular crystalline hydrazide-based COF photocatalysts, with the optoelectronic properties local pore characteristics COFs modulated using different linkers. The excited state electronic distribution transport pathways in are probed host experimental methods theoretical calculations at molecular level. One our developed (denoted as COF-4) exhibits remarkable electron utilization efficiency charge transfer properties, achieving record-high uranium extraction performance ~6.84 mg/g/day natural seawater among all techniques reported so far. This study brings new understanding operation COF-based guiding design improved photocatalysts for many applications.
Language: Английский
Citations
283
Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214889 - 214889
Published: Oct. 15, 2022
Language: Английский
Citations
251
Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(9), P. 8594 - 8757
Published: March 3, 2022
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute the improvement selectivity in heterogeneous catalysis. Ways modify catalytic sites range from use reversible or irreversible adsorption molecular modifiers immobilization tethering homogeneous catalysts and development well-defined solid surfaces. The latter covers methods for dispersion single-atom within supports as well complex nanostructures, it includes post-modification materials via processes such silylation atomic layer deposition. All these methodologies exhibit both advantages limitations, but all offer new avenues design specific applications. Because high cost most fact that resulting may limited thermal chemical stability, be best aimed at improving selective synthesis value-added chemicals, incorporated organic schemes, other applications are being explored address problems energy production, instance, greener processes. details each approaches discussed, representative examples provided. We conclude some general remarks future this field.
Language: Английский
Citations
250
ACS Materials Letters, Journal Year: 2020, Volume and Issue: 2(7), P. 779 - 797
Published: May 20, 2020
Two-dimensional (2D) metal–organic frameworks (MOFs) play an essential role in response to external stimuli by changing their physical or chemical properties. This Review mainly aims at the recent progress of stimuli-response 2D MOFs. The various stimuli, such as ions, solvents, gas, light, electron, temperature, and others, MOFs are systematically introduced summarized. In addition, future perspectives relate for also discussed. We hope that this could provide a guideline help researchers design new
Language: Английский
Citations
231
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
Advanced Materials, Journal Year: 2021, Volume and Issue: 34(22)
Published: July 8, 2021
Recently, smart 2D covalent organic frameworks (COFs), combining the advantages of both inherent structure features and functional building blocks, have been demonstrated to show reversible changes in conformation, color, luminescence response external stimuli. This review provides a summary on recent progress COFs that are responsive stimuli such as metal ions, gas molecules, pH values, temperature, electricity, light, etc. Moreover, mechanisms design strategies, along with applications these stimulus-responsive chemical sensors photoelectronic devices also discussed. It is believed this would provide some guidelines for designing novel single-/multistimulus-responsive controllable behaviors advanced applications.
Language: Английский
Citations
213
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(30)
Published: April 29, 2023
Optimizing the electronic structure of covalent organic framework (COF) photocatalysts is essential for maximizing photocatalytic activity. Herein, we report an isoreticular family multivariate COFs containing chromenoquinoline rings in COF and electron-donating or withdrawing groups pores. Intramolecular donor-acceptor (D-A) interactions allowed tuning local charge distributions carrier separation under visible light irradiation, resulting enhanced performance. By optimizing optoelectronic properties COFs, a uranium extraction efficiency 8.02 mg/g/day was achieved using nitro-functionalized multicomponent natural seawater, exceeding performance all reported to date. Results demonstrate effective design strategy towards high-activity with intramolecular D-A structures not easily accessible traditional synthetic approaches.
Language: Английский
Citations
196
Journal of Cleaner Production, Journal Year: 2021, Volume and Issue: 291, P. 125822 - 125822
Published: Jan. 9, 2021
Language: Английский
Citations
186
Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(1)
Published: Sept. 18, 2020
Abstract Severe disease and environmental pollution derived from heavy metal ions has become one of the major problems in global public health. In particular, mercury(II) as type highly poisonous pollutant can destroy human metabolism, central nervous system, immune representing a critical threat to living systems. Therefore, exploitation new strategies for designing synthesizing eco‐friendly, efficient, economical materials selective detection removal Hg 2+ is great importance. Among various measures sensing, detection, mercury ions, advanced functional systems including nanomaterials, polymers, aggregation‐induced emission luminogens, porous have attracted considerable attention over past years due their capabilities real‐time rapid removal, anti‐interference, quick response, high selectivity, low limit detection. this review, some efficient techniques aqueous solutions using abovementioned are overviewed ways which these material used tackle problem also discussed.
Language: Английский
Citations
177