Interfacial Chemical Bond and Oxygen Vacancy‐Enhanced In₂O₃/CdSe‐DETA S‐scheme Heterojunction for Photocatalytic CO₂ Conversion

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(23)

Published: March 2, 2023

Abstract The S‐scheme heterojunctions have great potential for photocatalytic carbon dioxide reduction due to their unique carrier migration pathways, superior separation efficiencies, and high redox capacities. However, the precise process of oriented powerful electron transport remains a challenge. Herein, an InOCd bond‐modulated heterojunction In 2 O 3 /CdSe‐DETA is synthesized by simple microwave‐assisted hydrothermal method accelerated photogenerated transfer. Meanwhile, oxygen vacancies (Vo) capture effect. Consequently, thanks synergistic effect this In‐Vo‐In‐O‐Cd structural units at interface, electrons are extracted rapidly transferred surface‐active sites, which improves electronic coupling CO . This finding precisely adjusts transfer pathway shortens distance. chemical bond established in heterostructure with (Vo‐In ) provides new insights into reduction.

Language: Английский

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Fundamentals and Challenges of Engineering Charge Polarized Active Sites for CO₂ Photoreduction toward C₂ Products

Accounts of Chemical Research, Journal Year: 2023, Volume and Issue: 56(18), P. 2500 - 2513

Published: Sept. 1, 2023

ConspectusGlobal warming and climatic deterioration are partly caused by carbon dioxide (CO2) emission. Given this, CO2 reduction into valuable carbonaceous fuels is a win–win route to simultaneously alleviate the greenhouse effect energy crisis, where hydrocarbon solar may be potential strategy. Up now, most of current photocatalysts photoconvert C1 products. It extremely difficult achieve production C2 products, which have higher economic value density, due kinetic challenge C–C coupling intermediates. Therefore, realize photoreduction fuels, design high-activity expedite significant. Besides, mechanism for toward usually uncertain, possibly attributed following two reasons: (1) arduous determine actual catalytic sites step. (2) hard monitor low-concentration active intermediates during multielectron transfer step.Most traditional metal-based possess charge balanced that same density. In this aspect, neighboring also show distribution, would lead dipole–dipole repulsion, thus preventing producing fuels. By contrast, with polarized obviously different distributions in adjacent intermediates, can effectively suppress electrostatic repulsion steer coupling. Based on analysis, asymmetric density more beneficial anchoring between atoms catalysts, boost coupling.In Account, we summarize various strategies, including vacancy engineering, doping loading heterojunction tailoring first time. Also, overview diverse situ characterization technologies, such as X-ray photoelectron spectroscopy, Raman Fourier transform infrared determining monitoring reaction helping reveal internal We hope Account help readers understand crucial function products provide guidance designing preparing highly catalysts photocatalytic reduction.

Language: Английский

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Emerging Xene‐Based Single‐Atom Catalysts: Theory, Synthesis, and Catalytic Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: June 17, 2023

Abstract In recent years, the emergence of novel 2D monoelemental materials (Xenes), e.g., graphdiyne, borophene, phosphorene, antimonene, bismuthene, and stanene, has exhibited unprecedented potentials for their versatile applications as well addressing new discoveries in fundamental science. Owing to unique physicochemical, optical, electronic properties, emerging Xenes have been regarded promising candidates community single‐atom catalysts (SACs) active sites or support matrixes significant improvement intrinsic activity selectivity. order comprehensively understand relationships between structure property Xene‐based SACs, this review represents a comprehensive summary from theoretical predictions experimental investigations. Firstly, calculations regarding both anchoring on doping/substituting heteroatoms at are briefly summarized. Secondly, controlled synthesis precise characterization presented SACs. Finally, current challenges future opportunities development SACs highlighted.

Language: Английский

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A Review of Phosphorus Structures as CO₂ Reduction Photocatalysts

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

Published: Feb. 12, 2023

Effective photocatalytic carbon dioxide (CO2 ) reduction into high-value-added chemicals is promising to mitigate current energy crisis and global warming issues. Finding effective photocatalysts crucial for CO2 reduction. Currently, metal-based semiconductors have been well reviewed, while review of nonmetal-based almost limited nitrides. Phosphorus a nonmetal with various allotropes tunable band gaps, which has demonstrated be non-metallic photocatalysts. However, no systematic about phosphorus structures reactions reported. Herein, the progresses as are reviewed. The fundamentals reduction, corresponding properties allotropes, doping or phosphorus-containing ligands, research progress reviewed in this paper. future perspective also presented.

Language: Английский

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Noble‐Metal‐Free Single‐ and Dual‐Atom Catalysts for Artificial Photosynthesis

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(22)

Published: May 13, 2023

Abstract Artificial photosynthesis enables direct solar‐to‐chemical energy conversion aimed at mitigating environmental pollution and producing solar fuels chemicals in a green sustainable approach, efficient, robust, low‐cost photocatalysts are the heart of artificial systems. As an emerging new class cocatalytic materials, single‐atom catalysts (SACs) dual‐atom (DACs) have received great deal current attention due to their maximal atom utilization unique photocatalytic properties, whereas noble‐metal‐free ones impart abundance, availability, cost‐effectiveness allowing for scalable implementation. This review outlines fundamental principles synthetic methods SACs DACs summarizes most recent advances (Co, Fe, Cu, Ni, Bi, Al, Sn, Er, La, Ba, etc.) (CuNi, FeCo, InCu, KNa, CoCo, CuCu, based on non‐noble metals, confined arsenal organic or inorganic substrates (polymeric carbon nitride, metal oxides, sulfides, metal–organic frameworks, carbon, acting as versatile scaffolds solar‐light‐driven reactions, including hydrogen evolution, dioxide reduction, methane conversion, synthesis, nitrogen fixation, peroxide production, remediation. The concludes with challenges, opportunities, future prospects photosynthesis.

Language: Английский

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Recent Progress of Single‐Atom Photocatalysts Applied in Energy Conversion and Environmental Protection

Small, Journal Year: 2023, Volume and Issue: 19(22)

Published: Feb. 28, 2023

Abstract Photocatalysis driven by solar energy is a feasible strategy to alleviate crises and environmental problems. In recent years, significant progress has been made in developing advanced photocatalysts for efficient solar‐to‐chemical conversion. Single‐atom catalysts have the advantages of highly dispersed active sites, maximum atomic utilization, unique coordination environment, electronic structure, which become research hotspot heterogeneous photocatalysis. This paper introduces potential supports, preparation, characterization methods single‐atom detail. Subsequently, fascinating effects on three critical steps photocatalysis (the absorption incident light produce electron‐hole pairs, carrier separation migration, interface reactions) are analyzed. At same time, applications conversion protection (CO 2 reduction, water splitting, N fixation, organic macromolecule reforming, air pollutant removal, degradation) systematically summarized. Finally, opportunities challenges discussed. It hoped that this work can provide insights into design, synthesis, application promote development high‐performance photocatalytic systems.

Language: Английский

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Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

EcoEnergy, Journal Year: 2023, Volume and Issue: 1(1), P. 108 - 153

Published: Sept. 1, 2023

Abstract Photoelectrochemical (PEC) water splitting with zero carbon emissions is a promising technology to solve the global issues of energy shortage and environmental pollution. However, current development PEC systems facing bottleneck low solar‐to‐hydrogen (STH) efficiency (<10%), which cannot meet demand large‐scale H 2 production. The low‐cost, highly active, stable photoanode materials crucial for high STH splitting. recent BiVO 4 as has been great success, ABO ‐type ternary metal oxides similar structure have potential efficient photoanodes high‐performance design are critically reviewed special emphasis on modification strategies performance improvement mechanisms each semiconductor. comprehensive analysis in this review provides guidelines insights exploration new high‐efficiency solar fuel

Language: Английский

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Photocontrolled heterojunctions constructed from holmium single atom modified Mg_1.2Ti_1.8O₅/g-C₃N₄ with enhanced photocatalytic CO₂ conversion

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5039 - 5047

Published: Jan. 1, 2024

This work is the first to introduce photocontrolled catalysts into CO 2 RR, and further RE single atom catalysts, aiming optimize photocatalytic performance by utilizing synergistic effect of composites.

Language: Английский

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Polyarylimide-Based COF/MOF Nanoparticle Hybrids for CO₂ Conversion, Hydrogen Generation, and Organic Pollutant Degradation

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 10451 - 10465

Published: April 25, 2024

The continuous rise in atmospheric CO2 concentration, overconsumption of energy resources, and release extraordinary organic pollutants are challenging issues the modern era. Catalytic technology offers a promising solution to tackle these environmental challenges parallel by facilitating highly effective sustainable processes. Herein, we report fabrication series different nature polyarylimide (PAI)-based covalent–organic frameworks (COFs) via polycondensation reaction altering linkers, solvents, other experimental conditions. To optimize their catalytic performance, resultant PAI-COFs were further decorated with metal–organic (ZIF-67). decoration COF4 ZIF-67 led adjusted bandgaps, created an active site, enhanced charge separation migration photoexcited electron–hole (e–h) pairs, extended light absorption visible region, also facilitated transferring electrons between COFs MOFs photoelectron modulation approach. Based on our findings, it is confirmed that (MOFs) optimal catalysts compared (COF1, COF2, COF3) (ZIF-8). Interestingly, pristine COF4, 5ZIF-67/COF4 nanohybrid revealed ∼8-fold ∼5.3-fold for conversion, direct capturing, photoelectrochemical conversion faradaic efficiency 50%. Likewise, as-fabricated catalyst exhibits exceptional activities photocatalytic hydrogen production pollutant oxidation. Ultimately, this work will provide roadmap design COF-based nanohybrids applications.

Language: Английский

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Z-scheme heterojunction ZnS/WO3 composite: Photocatalytic reduction of uranium and band gap regulation mechanism

Journal of Colloid and Interface Science, Journal Year: 2022, Volume and Issue: 630, P. 727 - 737

Published: Nov. 2, 2022

Language: Английский

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