Enhanced CeO2 oxygen defects decorated with AgInS2 quantum dots form an S-scheme heterojunction for efficient photocatalytic selective oxidation of xylose

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 348, P. 123834 - 123834

Published: April 24, 2024

Language: Английский

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Atomically Dispersed Cu Active Centers: Local Structure and Mechanism Modulation for Carbon Dioxide Reduction

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract Reducing carbon dioxide （CO 2 ）to high‐value products using green renewable energy is a promising approach for addressing and greenhouse effect issues. Consequently, electrocatalytic CO reduction reaction (CO RR) technology has become current research hotspot. Since the discovery of high activity selectivity copper in RR, atomically dispersed Cu catalysts have garnered widespread attention due to their efficient atom utilization, unique electronic structure, outstanding catalytic performance. However, great challenge remains providing rational catalyst design principles achieve regulation product distribution. A clear understanding materials an in‐depth interpretation mechanism as well elucidation strategy progress toward different are keys building solving above problem. Therefore, this review starts with introduction advanced characterization techniques reveal structure mechanisms. Then, various optimization strategies applications producing targeted summarized discussed. Finally, perspectives on RR field future development offered.

Language: Английский

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A versatile strategy for broadening light absorption to ultraviolet–visible region on Zr-based MOF photocatalysts for efficient CO2 reduction

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160812 - 160812

Published: Feb. 1, 2025

Language: Английский

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NH₂-MIL-125(Ti) and its functional nanomaterials – a versatile platform in the photocatalytic arena

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Versatile photocatalytic applications of NH 2 -MIL-125(Ti) and its functional nanomaterials.

Language: Английский

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Enhanced Activity of Enzyme Immobilized on Hydrophobic ZIF‐8 Modified by Ni²⁺ Ions

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(7)

Published: Dec. 20, 2022

The development of efficient enzyme immobilization to promote their recyclability and activity is highly desirable. Zeolitic imidazolate framework-8 (ZIF-8) has been proved be an effective platform for due its easy preparation biocompatibility. However, the intrinsic hydrophobic characteristic hinders further in this filed. Herein, a facile synthesis approach was developed immobilize pepsin (PEP) on ZIF-8 carrier by using Ni2+ ions as anchor (ZIF-8@PEP-Ni). By contrast, direct coating PEP surface (ZIF-8@PEP) generated significant conformational changes. Electrochemical oxygen evolution reaction (OER) employed study catalytic immobilized PEP. ZIF-8@PEP-Ni composite attains remarkable OER performance with ultralow overpotential only 127 mV at 10 mA cm-2 , which much lower than 690 919 values ZIF-8@PEP PEP, respectively.

Language: Английский

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Metal-organic framework composites for photocatalysis

EnergyChem, Journal Year: 2023, Volume and Issue: 6(1), P. 100115 - 100115

Published: Nov. 22, 2023

Language: Английский

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Atomically Dispersed ZnN₅Sites Immobilized on g‐C₃N₄Nanosheets for Ultrasensitive Selective Detection of Phenanthrene by Dual Ratiometric Fluorescence

Advanced Materials, Journal Year: 2023, Volume and Issue: unknown, P. 2211575 - 2211575

Published: Jan. 21, 2023

Ultrasensitively selective detection of trace polycyclic aromatic hydrocarbons (PAHs) like phenanthrene (PHE) is critical but remains challenging. Herein, atomically dispersed Zn sites on g-C3N4 nanosheets (sZn-CN) are constructed by thermal polymerization a Zn–cyanuric acid–melamine supramolecular precursor for the fluorescence PHE. A high amount (1.6 wt%) sZn grafted in cave CN with one N vacancy form unique Zn(II)N5 coordination. The optimized sZn-CN achieves wide range (1 ng L−1 to 5 mg L−1), ultralow limit (0.35 L−1, 5-order magnitude improvement over CN), and ultrahigh selectivity toward PHE even among typical PAHs based built PHE-CN dual ratiometric method. By means situ Fourier transform infrared spectroscopy, time-resolved absorption theoretical calculations, resulting superior performance attributed favorable adsorption as-constructed atomic via ionic cation–π interactions (Znδ+C2δ− type), quenching dominated inner filter effect (IFE) from multilayer at low concentrations, while it done protruded photogenerated electron-transfer process, as well IFE monolayer concentration.

Language: Английский

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A π‐Conjugated Van der Waals Heterostructure Between Single‐Atom Ni‐Anchored Salphen‐Based Covalent Organic Framework and Polymeric Carbon Nitride for High‐Efficiency Interfacial Charge Separation

Small, Journal Year: 2023, Volume and Issue: 19(33)

Published: April 17, 2023

Semiconductor-based heterostructures have exhibited great promise as a photocatalyst to convert solar energy into sustainable chemical fuels, however, their solar-to-fuel efficiency is largely restricted by insufficient interfacial charge separation and limited catalytically active sites. Here the integration of high-efficiency sufficient single-atom metal sites in 2D van der Waals (vdW) heterostructure between ultrathin polymeric carbon nitride (p-CN) Ni-containing Salphen-based covalent organic framework (Ni-COF) nanosheets illustrated. The results reveal NiN2 O2 bonding NiCOF nanosheets, leading highly separated Ni sites, which will function boost fuel production, confirmed X-ray absorption spectra density functional theory calculations. Using ultrafast femtosecond transient adsorption (fs-TA) spectra, it shows that vdW p-CN/Ni-COF exhibits faster decay lifetime exciton annihilation (τ = 18.3 ps) compared neat p-CN (32.6 ps), illustrating an efficiently accelerated electron transfer across heterointerface from Ni-COF, thus allows more electrons available participate subsequent reduction reactions. photocatalytic offer generation rate 2.29 mmol g-1 h-1 for H2 6.2 µmol CO, ≈127 three times higher than p-CN, respectively. This work provides new insights construction π-conjugated on promoting photocatalysis.

Language: Английский

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Solar‐Driven Conversion of CO₂ to C₂ Products by the 3d Transition Metal Intercalates of Layered Lead Iodides

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)

Published: May 2, 2024

Abstract Photocatalytic CO 2 reduction to high‐value‐added C 2+ products presents significant challenges, which is attributed the slow kinetics of multi‐e − photoreduction and high thermodynamic barrier for C–C coupling. Incorporating redox‐active Co /Ni cations into lead halide photocatalysts has potentials improve carrier transport introduce charge polarized bimetallic sites, addressing kinetic issues, respectively. In this study, a coordination‐driven synthetic strategy developed 3d transition metals interlamellar region layered organolead iodides with atomic precision. The resultant hybrids exhibit selective H 5 OH using O vapor at evolution rates 24.9–31.4 µmol g −1 h selectivity 89.5–93.6%, while pristine iodide yields only 1 products. Band structure calculations photoluminescence studies indicate that interlayer species greatly contribute frontier orbitals enhance exciton dissociation free carriers, facilitating between adjacent layers. addition, Bader distribution in situ experimental spectroscopic reveal asymmetric Ni–O–Pb catalytic sites intrinsic polarization, promoting coupling leading formation key *OC–CHO intermediate.

Language: Английский

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Recent development and applications of differential electrochemical mass spectrometry in emerging energy conversion and storage solutions

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(13), P. 6917 - 6959

Published: Jan. 1, 2024

Electrochemical energy conversion and storage are playing an increasingly important role in shaping the sustainable future. Differential electrochemical mass spectrometry (DEMS) offers

Language: Английский

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