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

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Atomically Dispersed Indium‐Copper Dual‐Metal Active Sites Promoting C−C Coupling for CO₂ Photoreduction to Ethanol

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(40)

Published: Aug. 10, 2022

Photoreduction of CO2 to C2+ solar fuel is a promising carbon-neutral technology for renewable energy. This strategy challenged by its low productivity due efficiency in multielectron utilization and slow C-C coupling kinetics. work reports dual-metal photocatalyst consisting atomically dispersed indium copper anchored on polymeric carbon nitride (InCu/PCN), which the photoreduction delivered an excellent ethanol production rate 28.5 μmol g-1 h-1 with high selectivity 92 %. Coupled experimental investigation DFT calculations reveal following mechanisms underpinning performance this catalyst. Essentially, In-Cu interaction enhances charge separation accelerating transfer from PCN metal sites. Indium also transfers electrons neighboring via Cu-N-In bridges, increasing electron density active Furthermore, sites promote adsorption *CO intermediates lower energy barrier coupling.

Language: Английский

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Electrochemical reduction of carbon dioxide to multicarbon (C₂₊) products: challenges and perspectives

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(11), P. 4714 - 4758

Published: Jan. 1, 2023

This review analyzes advanced catalysts and C 2+ synthesis mechanisms based on theoretical explorations in situ / operando characterizations. Triphasic interface optimization is discussed for the potential of industry-compatible stability.

Language: Английский

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Tunable Interfacial Charge Transfer in a 2D–2D Composite for Efficient Visible‐Light‐Driven CO₂ Conversion

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(26)

Published: March 25, 2023

Photocatalytic CO2 conversion for hydrocarbon fuel production has been known as one of the most promising strategies achieving carbon neutrality. Yet, its efficiency remains unsatisfactory mainly due to severe charge-transfer resistance and slow charge kinetics. Herein, a tunable interfacial transfer on an oxygen-vacancies-modified bismuth molybdate nanoflower assembled by 2D nanosheets (BMOVs) bismuthene composite (Bi/BMOVs) is demonstrated photocatalytic conversion. Specifically, meticulous design Ohmic contact formed between BMOVs can allow modulation resistance. According density functional theory (DFT) simulations, it ascertained that such exceptional kinetics attributed built-in electric field (IEF) contact. As such, reduction performance optimized Bi/BMOVs (CO CH4 productions rate 169.93 4.65 µmol g-1 h-1 , respectively) ca. 10 times higher than pristine BMO rates 16.06 0.51 respectively). The reported in this work shed some important light highly efficient photocatalysts both energy environmental applications.

Language: Английский

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Recent Progress on Semiconductor Heterogeneous Photocatalysts in Clean Energy Production and Environmental Remediation

Catalysts, Journal Year: 2023, Volume and Issue: 13(7), P. 1102 - 1102

Published: July 14, 2023

Semiconductor-based photocatalytic reactions are a practical class of advanced oxidation processes (AOPs) to address energy scarcity and environmental pollution. By utilizing solar as clean, abundant, renewable source, this process offers numerous advantages, including high efficiency, eco-friendliness, low cost. In review, we present several methods construct various photocatalyst systems with excellent visible light absorption efficient charge carrier separation ability through the optimization materials design reaction conditions. Then it introduces fundamentals photocatalysis in both clean generation remediation. other parts, introduce approaches enhance activity by applying different strategies, semiconductor structure modification (e.g., morphology regulation, co-catalysts decoration, doping, defect engineering, surface sensitization, heterojunction construction) tuning optimizing conditions (such concentration, initial contaminant pH, temperature, intensity, charge-carrier scavengers). Then, comparative study on performance recently examined photocatalysts applied production remediation will be discussed. To realize these goals, H2 via water splitting, CO2 reduction value-added products, dye, drug photodegradation lessen toxic chemicals, presented. Subsequently, report dual-functional for simultaneous pollutant reactions. brief discussion about industrial economical applications is described. The follows introducing application artificial intelligence machine learning selection an innovative issues. Finally, summary future research directions toward developing significantly improved efficiency stability provided.

Language: Английский

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Constructing two-dimensional/two-dimensional reduced graphene oxide/MoX2 (X = Se and S) van der Waals heterojunctions: a combined composition modulation and interface engineering strategy for microwave absorption

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(6)

Published: Nov. 24, 2023

Language: Английский

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Metal–Organic Framework‐Based Photocatalysis for Solar Fuel Production

Small Methods, Journal Year: 2022, Volume and Issue: 7(1)

Published: Dec. 1, 2022

Abstract Metal–organic frameworks (MOFs) represent a novel class of crystalline inorganic–organic hybrid materials with tunable semiconducting behavior. MOFs have potential for application in photocatalysis to produce sustainable solar fuels, owing their unique structural advantages (such as clarity and modifiability) that can facilitate deeper understanding the structure–activity relationship photocatalysis. This review takes photocatalytic active sites particular perspective, summarizing progress MOF‐based fuel production; mainly including three categories solar‐chemical conversions, water splitting hydrogen fuel, carbon dioxide reduction hydrocarbon nitrogen fixation high‐energy carriers such ammonia. focuses on types photocatalysts discusses enhanced activity based well‐defined structure MOFs, offering deep insights into

Language: Английский

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Isolated Electron Trap‐Induced Charge Accumulation for Efficient Photocatalytic Hydrogen Production

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(25)

Published: April 20, 2023

The solar-driven evolution of hydrogen from water using particulate photocatalysts is considered one the most economical and promising protocols for achieving a stable supply renewable energy. However, efficiency photocatalytic splitting far satisfactory due to sluggish electron-hole pair separation kinetics. Herein, isolated Mo atoms in high oxidation state have been incorporated into lattice Cd0.5 Zn0.5 S (CZS@Mo) nanorods, which exhibit rate 11.32 mmol g-1 h-1 (226.4 μmol ; catalyst dosage 20 mg). Experimental theoretical simulation results imply that highly oxidized species lead mobile-charge imbalances CZS induce directional photogenerated electrons transfer, resulting effectively inhibited recombination greatly enhanced efficiency.

Language: Английский

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Surface decorated Ni sites for superior photocatalytic hydrogen production

SusMat, Journal Year: 2022, Volume and Issue: 2(4), P. 466 - 475

Published: July 30, 2022

Abstract Precise construction of isolated reactive centers on semiconductors with well‐controlled configurations affords a great opportunity to investigate the reaction mechanisms in photocatalytic process and realize targeted conversion solar energy steer charge kinetics for hydrogen evolution. In current research, we decorated Ni atoms surface CdS nanowires efficient production. X‐ray absorption fine structure investigations clearly demonstrate atomical dispersion sites nanowires. Experimental reveal that not only perform well as real but also greatly accelerate electron transfer via direct Ni–S coordination. Theoretical simulation further documents adsorption has been enhanced over semi‐coordinated through electronic coupling at atomic scale.

Language: Английский

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Interface Engineering in 2D/2D Heterogeneous Photocatalysts

Small, Journal Year: 2022, Volume and Issue: 19(5)

Published: Dec. 7, 2022

Assembling different 2D nanomaterials into heterostructures with strong interfacial interactions presents a promising approach for novel artificial photocatalytic materials. Chemically implementing the nanomaterials' construction/stacking modes to regulate interfaces can extend their functionalities and achieve good performance. Herein, based on fundamental principles photochemical processes, multiple construction (e.g., face-to-face, edge-to-face, interface-to-face, edge-to-edge) are overviewed systematically emphasis relationships between characteristics point, linear, planar), synthetic strategies in situ growth, ex assembly), enhanced applications precise regulation. Meanwhile, recent efforts enhancing performances of 2D/2D summarized from critical factors visible light absorption, accelerating charge transfer/separation, introducing active sites. Notably, crucial roles surface defects, cocatalysts, modification performance optimization also discussed synergistic effect engineering heterogeneous interfaces. Finally, perspectives challenges proposed emphasize future opportunities expanding photocatalysis.

Language: Английский

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