Ta3N5/CdS Core–Shell S-scheme Heterojunction Nanofibers for Efficient Photocatalytic Removal of Antibiotic Tetracycline and Cr(VI): Performance and Mechanism Insights

Advanced Fiber Materials, Journal Year: 2023, Volume and Issue: 5(3), P. 994 - 1007

Published: Feb. 16, 2023

Language: Английский

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S‐Scheme Co₉S₈@Cd_0.8Zn_0.2S‐DETA Hierarchical Nanocages Bearing Organic CO₂ Activators for Photocatalytic Syngas Production

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(15)

Published: March 1, 2023

Abstract Delicate modulations of CO 2 activation and charge carrier separation/migration are challenging, yet imperative to augment photoreduction efficiency. Herein, by supporting diethylenetriamine (DETA)‐functionalized Cd 0.8 Zn 0.2 S nanowires on the exterior surface hollow Co 9 8 polyhedrons, hierarchical @Cd S‐DETA nanocages fabricated as an S‐scheme photocatalyst for reducing protons produce syngas (CO H ). The amine groups strengthen adsorption , while “nanowire‐on‐nanocage” heterostructure with interface boosts separation transfer photoinduced charges. Employing Co(bpy) 3 2+ a cocatalyst, optimal effectively produces in rates 70.6 18.6 µmol h −1 (i.e., 4673 1240 g ), respectively, affording apparent quantum efficiency 9.45% at 420 nm, which is highest value under comparable conditions. Ultraviolet photoelectron spectroscopy, Kelvin probe, electron spin resonance confirm S‐schematic charge‐transfer process photocatalyst. key COOH * species responsible ‐to‐CO reduction detected in‐situ diffuse reflectance infrared Fourier transform spectroscopy endorsed density functional theory calculations, thus possible mechanism proposed.

Language: Английский

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Recent Progress of Metal Sulfide Photocatalysts for Solar Energy Conversion

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(45)

Published: May 27, 2022

Artificial photosynthetic solar-to-chemical cycles enable an entire environment to operate in a more complex, yet effective, way perform natural photosynthesis. However, such artificial systems suffer from lack of well-established photocatalysts with the ability harvest solar spectrum and rich catalytic active-site density. Benefiting extensive experimental theoretical investigations, this bottleneck may be overcome by devising photocatalytic platform based on metal sulfides predominant electronic, physical, chemical properties. These tunable properties can endow them abundant active sites, favorable light utilization, expedited charge transportation for conversion. Here, it is described how some vital lessons extracted previous investigations are employed promote further development photosynthesis, including water splitting, CO2 reduction, N2 pollutant removal. Their functions, properties, synthetic strategies, emerging issues, design principles, intrinsic functional mechanisms redox reactions discussed detail. Finally, associated challenges prospects utilization highlighted future trends photocatalysis envisioned.

Language: Английский

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Plasmonic Active “Hot Spots”‐Confined Photocatalytic CO₂ Reduction with High Selectivity for CH₄ Production

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(14)

Published: Feb. 3, 2022

Plasmonic nanostructures have tremendous potential to be applied in photocatalytic CO2 reduction, since their localized surface plasmon resonance can collect low-energy-photons derive energetic "hot electrons" for reducing the activation-barrier. However, hot electron-driven reduction is usually limited by poor efficiency and low selectivity producing kinetically unfavorable hydrocarbons. Here, a new idea of plasmonic active spot"-confined photocatalysis proposed overcome this drawback. W18 O49 nanowires on outer Au nanoparticles-embedded TiO2 electrospun nanofibers are assembled obtain lots Au/TiO2 /W18 sandwich-like substructures formed heterostructure. The short distance (< 10 nm) between adjacent induce an intense plasmon-coupling form spots" substructures. These capable not only gathering incident light enhance generation migration, but also capturing protons CO through dual-hetero-active-sites (Au-O-Ti W-O-Ti) at interface, as evidenced systematic experiments simulation analyses. Thus, during 43± 2 °C, these enriched well-designed heterostructure synergistically confine hot-electron, proton, intermediates resulting CH4 production-rates ≈35.55 ≈2.57 µmol g-1 h-1 , respectively, -product ≈93.3%.

Language: Английский

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High-efficiency ultrathin porous phosphorus-doped graphitic carbon nitride nanosheet photocatalyst for energy production and environmental remediation

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 307, P. 121099 - 121099

Published: Jan. 15, 2022

Language: Английский

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Solar Energy Catalysis

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(29)

Published: April 26, 2022

When it comes to using solar energy promote catalytic reactions, photocatalysis technology is the first choice. However, sunlight can not only be directly converted into chemical through a photocatalytic process, also different energy-transfer pathways. Using as source, reactions proceed independently, and coupled with other technologies enhance overall efficiency. Therefore, sunlight-driven are diverse, need given specific definition. We propose timely perspective for driven by give them definition, namely "solar catalysis". The concept of types catalysis, such photocatalysis, photothermal cell powered electrocatalysis, pyroelectric highlighted. Finally, their limitations future research directions discussed.

Language: Английский

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Recent advances in quantum dots photocatalysts

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 458, P. 141399 - 141399

Published: Jan. 9, 2023

Language: Английский

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Hollow Nanoboxes Cu_2‐xS@ZnIn₂S₄ Core‐Shell S‐Scheme Heterojunction with Broad‐Spectrum Response and Enhanced Photothermal‐Photocatalytic Performance

Small, Journal Year: 2022, Volume and Issue: 18(31)

Published: June 12, 2022

Major issues in photocatalysis include improving charge carrier separation efficiency at the interface of semiconductor photocatalysts and rationally developing efficient hierarchical heterostructures. Surface continuous growth deposition is used to make hollow Cu2-x S nanoboxes, then simple hydrothermal reaction core-shell S@ZnIn2 S4 S-scheme heterojunctions. The photothermal photocatalytic performance improved. In an experimental hydrogen production test, photocatalyst produces 4653.43 µmol h-1 g-1 hydrogen, which 137.6 13.8 times higher than pure ZnIn2 , respectively. Furthermore, exhibits a high tetracycline degradation water up 98.8%. For reactions, configuration gives large specific surface area more reactive sites. response range broadened, infrared light absorption enhanced, effect outstanding, process promoted. Meanwhile, characterizations, studies, active species trapping investigations, energy band structure analysis, theoretical calculations all reveal that heterojunction can efficiently increase photogenerated separation. This research opens new possibilities for future catalyst design development.

Language: Английский

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Hierarchically Ordered Macro–Mesoporous Electrocatalyst with Hydrophilic Surface for Efficient Oxygen Reduction Reaction

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(30)

Published: April 18, 2023

Metal-organic frameworks (MOFs) offer versatile templates/precursors to prepare supported metal catalysts. However, the afforded catalysts usually exhibit microporous structures and unsuitable wettability, which will restrict accessibility of active sites in liquid-phase reactions. Herein, an etching-functionalization strategy is developed for construction a tannic-acid-functionalized MOF with unique hollow-wall 3D-ordered macroporous (H-3DOM) structure. The functional can be further employed as ideal precursor synthesis cobalt on oxygen/nitrogen-co-doped carbon composites H-3DOM structures, hydrophilic surface. structure improve external surface area maximize exposure sites. Moreover, oxygen-containing groups enhance wettability guarantee more electrochemically accessible aqueous electrolyte. Benefitting from these outstanding characteristics, H-3DOM-Co/ONC exhibits high electrocatalytic activity oxygen reduction reaction, superior its counterparts without hierarchically ordered functionalization.

Language: Английский

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Efficient Photoreduction of Diluted CO₂to Tunable Syngas by Ni−Co Dual Sites through d‐band Center Manipulation

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(42)

Published: Aug. 29, 2022

Photocatalytic conversion of CO2 into syngas is a promising way to address the energy and environmental challenges. Here we report integration Ni-Co dual sites on Ni doped Co3 O4 ultrathin nanosheets assembled double-hollow nanotube (Ni-Co3 NSDHN) for efficient photoreduction low-concentration . Quasi in situ spectra density functional theory calculations demonstrate that declining d-band center enables electrons accumulation dxz /dyz -2π* dz2 -5σ orbitals. As result, binding strength *CO weakened *H adsorption site modulated from metal an oxygen site. Remarkably, Ni-Co3 NSDHN exhibits superior diluted photoconversion activity controllable selectivity under irradiation visible light or even natural sunlight. A evolution rate 170.0 mmol g-1 h-1 with apparent quantum yield 3.7 % continuously adjustable CO/H2 ratios 1 : 10 are achieved.

Language: Английский

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