Decade Milestone Advancement of Defect-Engineered g-C3N4 for Solar Catalytic Applications

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Jan. 4, 2024

Over the past decade, graphitic carbon nitride (g-C

Language: Английский

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Construction of a 2D/2D Crystalline Porous Materials Based S‐Scheme Heterojunction for Efficient Photocatalytic H₂ Production

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 7, 2024

Abstract Generally, the low electron–hole separation efficiency of covalent organic frameworks (COFs) prevents their catalytic performance from reaching satisfactory results. For this reason, creation heterojunctions is considered an effective strategy but usually suffers dimensional mismatch integrated material, even at expense its redox capacity. To overcome these difficulties, a novel 2D/2D S‐scheme heterojunction between H 2 N–Cu–MOF (NCM) and TpPa–1–COF (TP1C) successfully constructed for efficient photocatalytic production. The matching dimensions two crystalline porous materials enables with abundant surface reactive sites, strong interaction optimized electronic structure. Moreover, combination can also form S–scheme heterojunction, which not only promote pair, preserve ability, thus remarkably boosting competence. Consequently, rate optimal 20% NCM/TP1C in production reaches 4.19 mmol g −1 h , 46.5 times higher than that bare NCM, 22.1 folds over pure TP1C. This research offers innovative perspective formation based on crystal solar energy utilization.

Language: Английский

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Advances of Electrochemical and Electrochemiluminescent Sensors Based on Covalent Organic Frameworks

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)

Published: Nov. 30, 2023

Abstract Covalent organic frameworks (COFs), a rapidly developing category of crystalline conjugated polymers, possess highly ordered structures, large specific surface areas, stable chemical properties, and tunable pore microenvironments. Since the first report boroxine/boronate ester-linked COFs in 2005, have gained popularity, showing important application prospects various fields, such as sensing, catalysis, separation, energy storage. Among them, COFs-based electrochemical (EC) sensors with upgraded analytical performance are arousing extensive interest. In this review, therefore, we summarize basic properties general synthesis methods used field electroanalytical chemistry, special emphasis on their usages fabrication sensors, ions immunosensors, aptasensors. Notably, emerged electrochemiluminescence (ECL) realm thoroughly covered along preliminary applications. Additionally, final conclusions state-of-the-art provided terms EC ECL well challenges for extending improving research applications chemistry.

Language: Английский

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COFs‐Based Metal‐Free Heterojunctions for Solar‐to‐Chemical Energy Conversion

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 17, 2024

Abstract Covalent organic frameworks (COFs) are a promising class of polymers with the merits robust framework, ultrahigh porosity, and molecularly precise backbones, which reveals great potential for solar‐to‐chemical energy conversion in context mitigating environmental crises. However, photochemical activities individual COFs not as desired, primarily due to their limited light absorption, insufficient dissociation photogenerated excitons readily recombined carriers. Recently, COFs‐based metal‐free heterojunctions synergistic effects provide feasible route boost photocatalytic activity more environmentally friendly cost‐competitive manners. Herein, it is first systematically overview advances from heterojunction types, heterointerfaces interactions, primary design mechanisms. Then, typical photocatalysts (e.g., g‐C 3 N 4 ‐COFs, carbon materials‐COFs, polymer semiconductor‐COFs, COFs‐COFs heterojunction) summarized. Finally, challenges long‐term outlooks future offered terms efficiency, yield, stability, cost reaction mechanisms, well standardized evaluation method activities. It anticipated that this review can deliver new insights into fundamental engineering conversion, further accelerate development area.

Language: Английский

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Strain-Induced Surface Interface Dual Polarization Constructs PML-Cu/Bi12O17Br2 High-Density Active Sites for CO2 Photoreduction

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Jan. 16, 2024

Abstract The insufficient active sites and slow interfacial charge transfer of photocatalysts restrict the efficiency CO 2 photoreduction. synchronized modulation above key issues is demanding challenging. Herein, strain-induced strategy developed to construct Bi–O-bonded interface in Cu porphyrin-based monoatomic layer (PML-Cu) Bi 12 O 17 Br (BOB), which triggers surface dual polarization PML-Cu/BOB (PBOB). In this multi-step polarization, built-in electric field formed between interfaces induces electron from conduction band (CB) BOB CB PML-Cu suppresses its reverse migration. Moreover, further promotes converge atoms. introduction endows a high density dispersed on PBOB, significantly promoting adsorption activation desorption. conversion rate photoreduction for PBOB can reach 584.3 μmol g −1 , 7.83 times higher than 20.01 PML-Cu. This work offers valuable insights into regulation site design catalysts.

Language: Английский

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Recent Advances on Single‐Atom Catalysts for Photocatalytic CO₂ Reduction

Small, Journal Year: 2023, Volume and Issue: 19(48)

Published: Aug. 1, 2023

Abstract The present energy crisis and environmental challenges may be efficiently resolved by converting carbon dioxide (CO 2 ) into various useful products. development of more effective catalysts has been the main focus current research on photocatalytic CO reduction. Due to their high atomic efficiency superior catalytic activity, single‐atom (SACs) have attracted considerable interest in conversion. This review discusses developments, obstacles, potential SACs for And further, principle work compared analyzed effects support materials active site types reduction performance. believes that sharing these some inspiration rational design stable based can provided.

Language: Английский

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Nanoengineering Metal–Organic Frameworks and Derivatives for Electrosynthesis of Ammonia

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Aug. 24, 2023

Abstract Electrocatalytic synthesis under mild conditions has become increasingly important as one of the practical alternatives for industrial applications, especially green ammonia (NH 3 ) industry. A properly engineered electrocatalyst plays a vital role in realization superior catalytic performance. Among various types promising nanomaterials, metal–organic frameworks (MOFs) are competitive candidates developing efficient electrocatalytic NH from simple nitrogen-containing molecules or ions, such N 2 and NO − . In this review, recent advances development electrocatalysts derived MOFs electrosynthesis collected, categorized, discussed, including their application reduction reaction (NRR) (NO RR). Firstly, fundamental principles illustrated, plausible mechanisms generation , apparatus corresponding electrocatalysis, parameters evaluation efficiency, detection methods yielding Then, NRR processes discussed detail, pristine MOFs, MOF-hybrids, MOF-derived N-doped porous carbons, single atomic catalysts pyrolysis other MOF-related materials. Subsequently, RR also listed discussed. Finally, existing challenges prospects rational design fabrication electrochemical presented, evolution investigation with artificial intelligence, innovation synthetic catalysts, advancement characterization techniques, extended reactions. "Image missing"

Language: Английский

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All-Covalent Organic Framework Nanofilms Assembled Lithium-Ion Capacitor to Solve the Imbalanced Charge Storage Kinetics

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Feb. 15, 2024

Free-standing covalent organic framework (COFs) nanofilms exhibit a remarkable ability to rapidly intercalate/de-intercalate Li

Language: Английский

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Spatially Separated Photoredox in a Covalent Organic Frameworks Heterostructure Boosting Overall Water Splitting

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(4), P. 1411 - 1417

Published: March 11, 2024

Covalent organic frameworks (COFs) with excellent structural tunability have emerged as fascinating photocatalysts to fulfill future energy demands. Here, we developed a COFs heterostructure by assembling two for photocatalytic overall water splitting. The resulting exhibited an effective spatial separation of photoredox sites originating from the efficient photoinduced charge carriers through orientated interfacial electron transfer pathway. Accordingly, displays activity stoichiometric splitting into H2 and O2 under 5 W white LED light irradiation. Our efficiencies evolution rates up 120 58 μmol g–1 h–1 are significantly higher than those reported previously. combination experiments theoretical calculations shows that oxidation proceeds metal-free hydration-mediated This work sheds on rational design COF spatially separated

Language: Английский

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ZnIn₂S₄ Heterojunctions Constructed with In-MOF Precursor for Photocatalytic Hydrogen Evolution without Cocatalysts

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(14), P. 6546 - 6554

Published: March 27, 2024

Znln2S4 has great prospects for photocatalytic water splitting to hydrogen by visible light. Herein, a novel Znln2S4–In-MOF (ZnInMS4) photocatalyst is elaborately synthesized in situ method with In-MOF as the template and In3+ source. ZnInMS4 overcomes fast interface charge recombination sluggish lifetime via formed heterojunctions. Photoelectrochemical measurements reveal that charge-transfer kinetics enhanced since introduced act reliable charge-transport channel. exhibits outstanding cocatalyst-free H2 evolution rate of 70 μmol h–1 under irradiation (λ > 420 nm), which 3.2-fold higher than Znln2S4. In addition, shows good stability 16 h continuous reaction. This work illustrates feasibility MOF precursor instead inorganic salts directly synthesize photocatalysts high performance.

Language: Английский

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