Covalent organic frameworks towards photocatalytic applications: Design principles, achievements, and opportunities

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214882 - 214882

Published: Oct. 14, 2022

Language: Английский

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Internal Electric Field on Steering Charge Migration: Modulations, Determinations and Energy‐Related Applications

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 32(12)

Published: Nov. 25, 2021

Abstract Energy‐related problems induced by ever‐continuous fossil consumption have arisen as one of the most challenging issues in 21 st century, imposing urgent demands on advanced materials to achieve high energy utilization and a sustainable society. In various solar solar‐to‐fuel conversion processes, charge carriers are main inevitable participators, dynamics related their generation, migration, separation, is key advance material design for settling above issues. Internal electric field (IEF), also named built‐in field, could guide directional migration carriers, achieving effective utilization, prolonged lifetimes. This critical review begins with discussion modulation strategies toward IEF together in‐detail elucidated mechanisms its formation. Some cascade systems telling conclusive role from intrinsic strategy discussed. Then, summary state‐of‐the‐art advances characterization means both quantitative qualitative perspectives provided. Finally presented modulations several specific energy‐related applications concerning cell, photocatalysis, photodetectors, batteries better understand superiority well‐performed design, followed future development opportunities design.

Language: Английский

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2D CeO₂ and a Partially Phosphated 2D Ni-Based Metal–Organic Framework Formed an S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Langmuir, Journal Year: 2022, Volume and Issue: 38(6), P. 2117 - 2131

Published: Feb. 1, 2022

Here, an S-scheme heterojunction was constructed on the basis of modification a Ni-based metal-organic framework (Ni-MOF) by different in situ treatment strategies. First, NiS2, NiO, and Ni2P were derived surface Ni-MOF through sulfonation, oxidation, phosphatizing treatments. They can efficiently accept electrons from conduction band as trap centers, thus improving hydrogen production activity. Additionally, makes electronegativity Ni-MOF/P stronger than that original Ni-MOF, which enhance absorption protons, promoting evolution reaction. Next, successfully built coupling 2D CeO2 with Ni-MOF/P. The maximum rate hybrid catalyst (6.337 mmol g-1 h-1) is 14.18 times untreated due to full utilization photo-induced electrons. Finally, probable mechanism proposed analyzing series characterization results density functional theory (DFT) calculation.

Language: Английский

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MOFs-based S-scheme heterojunction photocatalysts

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 504, P. 215674 - 215674

Published: Jan. 23, 2024

Language: Английский

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Site‐Specific Electron‐Driving Observations of CO₂‐to‐CH₄ Photoreduction on Co‐Doped CeO₂/Crystalline Carbon Nitride S‐Scheme Heterojunctions

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(27)

Published: April 27, 2022

Photoexcited dynamic modulation, maximizing the effective utilization of photoinduced electron-hole pairs, dominates multiple electrons-involving reduction pathways for terminal CH4 evolution during CO2 photoreduction. Yet, site-specific regulation directional charge transfer by modification an S-scheme heterojunction has seldom been discussed. Herein, atomic-level tailoring strategy anchoring single-atomic Co into CeO2 co-catalyst rather than carbon nitride supports, which can selectively favor -to-CH4 photoreduction, is reported. Through in situ tracking investigations, this study identifies that surface Co-embedded bimetallic CeCo conjunction key feature driving a strong interconnection dynamical states through heterojunctions. The co-catalysts demonstrated to have critical effect on control, accelerating electrons from donations hubs, thereby promotes electronic transferability formation. As result, unprecedented yield (181.7 µmol g-1 ) obtained with high turnover number (411.4) fully gas-solid reaction, demonstrating its potential toward targeted formation without adding any sacrificial agent.

Language: Английский

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Phosphorus-enriched platinum diphosphide nanodots as a highly efficient cocatalyst for photocatalytic H2 evolution of CdS

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 439, P. 135758 - 135758

Published: March 12, 2022

Language: Английский

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A comparative review on adsorption and photocatalytic degradation of classified dyes with metal/non-metal-based modification of graphitic carbon nitride nanocomposites: Synthesis, mechanism, and affecting parameters

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 382, P. 134967 - 134967

Published: Nov. 14, 2022

Language: Английский

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Effect of Functional Group Modifications on the Photocatalytic Performance of g‐C₃N₄

Small, Journal Year: 2023, Volume and Issue: 19(27)

Published: March 25, 2023

Abstract In recent years, photocatalysis has received increasing attention in alleviating energy scarcity and environmental treatment, graphite carbon nitride (g‐C 3 N 4 ) is used as an ideal photocatalyst. However, it still remains numerous challenges to obtain the desirable photocatalytic performance of intrinsic g‐C . Functional group functionalization, formed by introducing functional groups into bulk structure, one common modification techniques modulate carrier dynamics increases number active sites, offering new opportunities break limits for structure‐to‐performance relationship Nevertheless, general overview advance less reported yet. order better understand at molecular level, a review latest development urgently needed. this review, terms structures, properties, activity mainly focused, well their mechanism reaction from level insights explained. Second, progress application introduced examples are given. Finally, difficulties presented, based on this, outlook future research direction shown.

Language: Английский

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A Lead-Free 0D/2D Cs₃Bi₂Br₉/Bi₂WO₆ S-Scheme Heterojunction for Efficient Photoreduction of CO₂

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(7), P. 9221 - 9230

Published: Feb. 9, 2023

Photocatalytic reduction of CO2 into valuable hydrocarbon fuels is one the green ways to solve energy problem and achieve carbon neutrality. Exploring photocatalyst with low toxicity high-efficiency key realize it. Here we report a lead-free halide perovskite-based 0D/2D Cs3Bi2Br9/Bi2WO6 (CBB/BWO) S-scheme heterojunction for photoreduction, prepared by facile electrostatic self-assembly approach. The CBB/BWO shows superior photoreduction under visible light CO generation rate 220.1 μmol·g–1·h–1, which ∼115.8 ∼18.5 times higher than that Cs3Bi2Br9 perovskite quantum dots (CBB PQDS) Bi2WO6 nanosheets (BWO NS), respectively. improved photocatalytic activity can be attributed tight structure charge transfer pathway between PQDS atomic layers NS, shortens transmission distance photogenerated carriers boosts efficient separation carriers. This work provides insight in manufacturing potential photocatalysts achieving

Language: Английский

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Carbon Nitrides with Grafted Dual-Functional Ligands as Electron Acceptors and Active Sites for Ultra-stable Photocatalytic H₂O₂ Production

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(15), P. 10474 - 10486

Published: July 26, 2023

Photocatalytic production of H2O2 from earth-abundant water and oxygen using low-cost metal-free carbon nitrides (CNs) through reduction is a prospective route toward greener future. However, the productivity restricted by rapid electron–hole separation low activity CNs. Herein, we rationally designed series CNs with covalently bonded dual-functional ligands acting as electron acceptors active sites to achieve high photocatalytic superior stability. The best-performing nitride displays rate 7.3 mmol/g h an apparent quantum efficiency 20.2% at 420 nm formic acid donor. Moreover, modified show excellent stable generation over 110 without significant decline. Mechanistic studies reveal that was produced 2e– reaction route. Photoluminescence, photo-electrochemical, Kelvin probe force microscopy results together theoretical calculations have revealed performance originates ligand. It not only acts acceptor promote photogenerated charge carrier withdrawing electrons but also works site accelerate lowering adsorption activation energy. this facial strategy grafting provides universal approach synthesize photocatalysts enhanced reactivity under mild conditions choosing proper for specific reaction.

Language: Английский

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