Conductive Phthalocyanine‐Based Covalent Organic Framework for Highly Efficient Electroreduction of Carbon Dioxide

Small, Journal Year: 2020, Volume and Issue: 16(52)

Published: Dec. 1, 2020

Abstract The electroreduction of CO 2 to value‐added chemicals such as is a promising approach realize carbon‐neutral energy cycle, but still remains big challenge including low current density. Covalent organic frameworks (COFs) with abundant accessible active single‐sites can offer bridge between homogeneous and heterogeneous electrocatalysis, the electrical conductivity limits their application for reaction (CO RR). Here, 2D conductive Ni‐phthalocyanine‐based COF, named NiPc‐COF, synthesized by condensation 2,3,9,10,16,17,23,24‐ octa ‐aminophthalocyaninato Ni(II) tert ‐butylpyrene‐tetraone highly efficient RR. Due its intrinsic sites, robust NiPc‐COF nanosheets exhibit very high selectivity (>93%) in wide range applied potentials −0.6 −1.1 V versus reversible hydrogen electrode (RHE) large partial density 35 mA cm −2 at RHE aqueous solution that surpasses all conventional COF electrocatalysts. bridged covalent pyrazine linkage maintain RR activity 10 h. This work presents implementation provides strategy enhance conversion efficiency electrocatalysis.

Language: Английский

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Review on the hazardous applications and photodegradation mechanisms of chlorophenols over different photocatalysts

Environmental Research, Journal Year: 2021, Volume and Issue: 195, P. 110742 - 110742

Published: Jan. 27, 2021

Language: Английский

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Iron-based catalysts for persulfate-based advanced oxidation process: Microstructure, property and tailoring

Chemical Engineering Journal, Journal Year: 2020, Volume and Issue: 421, P. 127845 - 127845

Published: Nov. 26, 2020

Language: Английский

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Engineering Covalent Organic Frameworks as Heterogeneous Photocatalysts for Organic Transformations

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(47)

Published: Sept. 14, 2022

Abstract Covalent organic frameworks (COFs) are an emerging category of polymers with highly porous crystalline structures. In the last decade, reports on use COFs as heterogeneous photocatalysts for transformations have shown significant progress. Still, comprehensive reviews mechanisms photocatalytic using lacking. This Review provides a and systematic overview COF‐based transformations. Firstly, we discuss photophysical properties characterization methods photocatalysts. Then, general mechanism, advantages, strategies to improve efficiency summarized. After that, advanced examples analyzed regard underlying mechanisms. The ends critical perspective challenges prospects.

Language: Английский

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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

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Recent progress in covalent organic frameworks as light-emitting materials

Materials Today Energy, Journal Year: 2021, Volume and Issue: 20, P. 100635 - 100635

Published: Jan. 2, 2021

Language: Английский

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Challenges and perspectives of covalent organic frameworks for advanced alkali-metal ion batteries

Science China Chemistry, Journal Year: 2021, Volume and Issue: 64(8), P. 1267 - 1282

Published: April 27, 2021

Language: Английский

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Metal-Free Photocatalysis: Two-Dimensional Nanomaterial Connection toward Advanced Organic Synthesis

ACS Nano, Journal Year: 2021, Volume and Issue: 15(3), P. 3621 - 3630

Published: March 14, 2021

Two-dimensional (2D) nanostructures are a frontier in materials chemistry as result of their extraordinary properties. Metal-free 2D nanomaterials possess extra appeal due to improved cost-effectiveness and lower toxicity with respect many inorganic structures. The outstanding electronic characteristics some metal-free semiconductors have projected them into the world organic synthesis, where they can function high-performance photocatalysts drive sustainable synthesis high-value molecules. Recent reports on this topic inspired stream research opened up theme that we believe will become one most dominant trends forthcoming years.

Language: Английский

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Rational Design of Novel COF/MOF S-Scheme Heterojunction Photocatalyst for Boosting CO₂ Reduction at Gas–Solid Interface

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(21), P. 24299 - 24308

Published: May 20, 2022

Solar-driven photoreduction of CO2 into valuable fuels offers a sustainable technology to relieve the energy crisis as well greenhouse effect. Yet exploration highly efficient, selective, stable, and environmental benign photocatalysts for reduction remains major issue challenge. The interfacial engineering heterojunction could be valid approach boost efficiency catalytic process. Herein, we propose novel covalent organic framework/metal framework (COF/MOF) photocatalyst, using olefin (C═C) linked (TTCOF) NH2-UiO-66 (Zr) (NUZ) representative building blocks, enhanced CO. optimized TTCOF/NUZ exhibited superior CO yield (6.56 μmol g-1 h-1) in gas-solid system when irradiated by visible light only with H2O (g) weak reductant, it was 4.4 5 times higher than pristine TTCOF NUZ, respectively. photogenerated electrons transfer route proposed follow typical step-scheme (S-scheme), which affirmed XPS, situ XPS EPR characterizations. boosting activity credited special charge carrier separation S-scheme heterojunction, can accelerate transportation improve redox ability at interface. This work paves way design preparation COF/MOF heterostructure reduction.

Language: Английский

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Process of metal–organic framework (MOF)/covalent–organic framework (COF) hybrids-based derivatives and their applications on energy transfer and storage

Nanoscale, Journal Year: 2022, Volume and Issue: 14(5), P. 1679 - 1699

Published: Jan. 1, 2022

The fossil-fuel shortage and severe environmental issues have posed ever-increasing demands on clean renewable energy sources, for which the exploration of electrocatalysts has been a big challenge toward transfer storage.

Language: Английский

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