Microdroplet assisted hollow ZnCdS@PDA nanocages’ synergistic confinement effect for promoting photocatalytic H₂O₂ production

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(6), P. 1515 - 1527

Published: Jan. 1, 2024

A ZnCdS@PDA hollow nanoreactor with sulfur vacancies and confinement effects is prepared. The microdroplets synergistically enrich O 2 for high photocatalytic H yield under neutral conditions without sacrificial agents.

Language: Английский

---

Efficient photocatalytic H2O2 production by using unstable S-O functional groups as oxygen adsorption and active sites in shuttlecock waste-derived N, S-doped carbon dots

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 435, P. 115579 - 115579

Published: May 29, 2024

Language: Английский

---

Constructing Interfacial B–P Bonding Bridge to Promote S-Scheme Charge Migration within Heteroatom-Doped Carbon Nitride Homojunction for Efficient H₂O₂ Photosynthesis

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

The emerging step (S)-scheme heterojunction systems became a powerful strategy in promoting photogenerated charge separation while maintaining their high redox potentials. However, the weak interfacial interaction limits migration rate S-scheme heterojunctions. Herein, we construct unique carbon nitride (CN) homojunction with boron (B)-doped CN and phosphorus (P)-doped (B-CN/P-CN) for hydrogen peroxide (H2O2) photosynthesis. B-CN/P-CN nanosheet composites revealed extensively tight contact, improved visible-light harvesting, reduced carrier lifetime. structural investigation results also indicate that chemical B–P bonding is formed between B-CN P-CN nanosheets, inducing an accelerated migration. Density functional theory calculations further clarify transfer mechanism. Consequently, 2e– oxygen reduction reaction was predominant pathway of H2O2 production, facilitated by homojunction. optimal yield reached 2199.5 μmol L–1 h–1 over (S3) photocatalyst under monochromatic LED irradiation, increasing 2–8 times as against most C3N4 photocatalysts. This study highlights crucial role heterojunction/homojunction materials, accompanied unveiling mechanism solar-energy conversions.

Language: Английский

---

Interfacial construction of SnS2/Zn0.2Cd0.8S nanopolyhedron heterojunctions for enhanced photocatalytic hydrogen evolution

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 651, P. 254 - 263

Published: July 22, 2023

Language: Английский

---

Regulating Oxygen Vacancies and Fermi Level of Mesoporous CeO_2‐x for Intensified Built‐In Electric Field and Boosted Charge Separation of Cs₃Bi₂Br₉/CeO_2‐x S‐Scheme Heterojunction

Small, Journal Year: 2023, Volume and Issue: 20(2)

Published: Sept. 3, 2023

Abstract Regulating the built‐in electric field (BEF) in heterojunction is a great challenge developing high‐efficiency photocatalysts. Herein, by tailoring content of oxygen vacancies constituent reduction semiconductor (mesoporous CeO 2‐x ), precise Fermi level (E F ) regulation realized, yielding an amplified E gap and intensified BEF Cs 3 Bi 2 Br 9 perovskite quantum dots/CeO S‐scheme heterojunction. Such enhanced offers strong driving force for directional electron transfer, boosting charge separation As result, optimized /CeO delivers remarkable CO conversion efficiency, with impressive production rate 80.26 µmol g −1 h high selectivity 97.6%. The transfer mode corroborated comprehensively density functional theory (DFT) calculations, situ X‐ray photoelectron spectroscopy (XPS), photo‐irradiated Kelvin probe microscopy (KPFM). Moreover, diffuse reflectance infrared Fourier transform spectra (DRIFTS) theoretical calculations are conducted cooperatively to reveal photoreduction pathway.

Language: Английский

---

Robust Covalent Organic Frameworks for Photosynthesis of H₂O₂: Advancements, Challenges and Strategies

Small, Journal Year: 2024, Volume and Issue: 20(44)

Published: July 6, 2024

Abstract Since 2020, covalent organic frameworks (COFs) are emerging as robust catalysts for the photosynthesis of hydrogen peroxide (H 2 O ), benefiting from their distinct advantages. However, current efficiency H production and solar‐to‐chemical energy conversion (SCC) remain suboptimal due to various constraints in reaction mechanism. Therefore, there is an imperative propose improvement strategies accelerate development this system. This comprehensive review delineates recent advances, challenges, utilizing COFs photocatalytic production. It explores fundamentals challenges (e.g., oxygen (O ) mass transfer rate, adsorption capacity, response sunlight, electron‐hole separation efficiency, charge selectivity, desorption) associated with process, well advantages, applications, classification, preparation purpose. Various enhance performance highlighted. The aims stimulate further advancements discusses potential prospects, application areas field.

Language: Английский

---

Efficient photocatalytic hydrogen peroxide production over S-scheme In2S3/molten salt modified C3N5 heterojunction

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 669, P. 506 - 517

Published: April 17, 2024

Language: Английский

---

Highly-separated Co anchored on S, O-doped carbon nitride for enhanced peroxymonosulfate activation: Insights into radical and non-radical pathways

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154580 - 154580

Published: Aug. 5, 2024

Language: Английский

---

Electronic Structure Modulation of Oxygen‐Enriched Defective CdS for Efficient Photocatalytic H₂O₂ Production

Small, Journal Year: 2024, Volume and Issue: 20(32)

Published: March 15, 2024

Abstract Artificial photosynthesis for hydrogen peroxide (H 2 O ) presents a sustainable and environmentally friendly approach to generate clean fuel chemicals. However, the catalytic activity is hindered by challenges such as severe charge recombination, insufficient active sites, poor selectivity. Here, robust strategy proposed regulate electronic structure of catalyst collaborative effect defect engineering dopant. The well designed oxygen‐doped CdS nanorods with S 2− defects Cd 2+ 4 d 10 electron configuration (CdS‐O,S v successfully synthesized, sites around or oxygen atoms exhibit rapid separation, suppressed carrier enhanced utilization. Consequently, remarkable H production rate 1.62 mmol g −1 h under air conditions acquired, an apparent quantum yield (AQY) 9.96% at single wavelength 450 nm. This work provides valuable insights into synergistic between doping on activity.

Language: Английский

---

Photocatalytic hydrogen peroxide production: Advances, mechanistic insights, and emerging challenges

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 114143 - 114143

Published: Sept. 16, 2024

Language: Английский

---