Potassium and Sulfur Dual Sites on Highly Crystalline Carbon Nitride for Photocatalytic Biorefinery and CO₂ Reduction

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(3), P. 2106 - 2117

Published: Jan. 24, 2023

The co-production of high-value-added chemicals and fuels by coupling biomass photooxidation with carbon dioxide (CO2) photoreduction has attracted wide interest. Nevertheless, there still lacks comprehensive studies. Herein, we synthesized a highly crystalline nitride potassium sulfur dual sites (K/S@CN-x) salt-template-assisted incorporation method. K/S high crystallinity resulted in the photocatalytic performance significantly enhancing visible-light absorption accelerated photogenerated charge separation/transfer. Thus, K/[email protected], monoxide (CO) evolution rate (16.27 μmol g–1 h–1) lactic acid yield (78.07%) were 4.80 times 1.15 times, respectively, those CN. Furthermore, density functional theory calculations performed to investigate role K S reactions. Our findings provide unique routes for synthesizing photocatalysts demonstrate feasibility selective oxidation coupled CO2 reduction.

Language: Английский

---

Unraveling the Synergy Mechanism between Photocatalysis and Peroxymonosulfate Activation on a Co/Fe Bimetal-Doped Carbon Nitride

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(13), P. 8973 - 8986

Published: June 22, 2023

Fenton-like catalysis based on peroxymonosulfate (PMS) activation has shown great potential in the treatment of organic wastewater. Heterogeneous catalysts containing transition metal active sites are highly efficient for PMS activation. However, reduction oxidized was usually not prompt due to sluggish reaction kinetics, which caused insufficient redox cycle and further hampered efficiency. Recent studies have that synergy effect between photocatalysis may address above obstacle boost overall a deeper understanding this is still missing, making it difficult be rationally controlled; thus, poor frequently reported. Herein, Co/Fe bimetal-doped graphitic carbon nitride (g-C3N4) designed representatively through systematical characterization theoretical calculation, revealed profoundly determined by competitive role hole system adsorbed metastable PMS* catalyst surface, furthermore, can manipulated; when doping ratio 2.5:2.5, as-prepared g-C3N4 with moderate valence band position endow an optimized photo-Fenton-like synergistic highest catalytic degradation performance. This work sheds light rational design catalysts.

Language: Английский

---

Cooperation of carbon doping and carbon loading boosts photocatalytic activity by the optimum photo-induced electron trapping and interfacial charge transfer

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 472, P. 144654 - 144654

Published: July 16, 2023

Language: Английский

---

Near‐Infrared Light‐Driven Photocatalysis with an Emphasis on Two‐Photon Excitation: Concepts, Materials, and Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(5)

Published: Sept. 13, 2023

Efficient utilization of sunlight in photocatalysis is widely recognized as a promising solution for addressing the growing energy demand and environmental issues resulting from fossil fuel consumption. Recently, there have been significant developments various near-infrared (NIR) light-harvesting systems artificial photosynthesis photocatalytic remediation. This review provides an overview most recent advancements NIR light through creation novel nanostructured materials molecular photosensitizers, well modulating strategies to enhance processes. A special focus given emerging two-photon excitation photocatalysis. The unique features limitations different are critically evaluated. In particular, it highlights advantages utilizing compared UV-visible irradiation one-photon excitation. Ongoing challenges potential solutions future exploration light-responsive also discussed.

Language: Английский

---

Reduction of Superoxide Radical Intermediate by Polydopamine for Efficient Hydrogen Peroxide Photosynthesis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)

Published: Feb. 10, 2024

Abstract The synthesis of hydrogen peroxide through artificial photosynthesis is a green and promising technology with advantages in sustainability, economy safety. However, superoxide radical (⋅O 2 − ), an important intermediate photocatalytic oxygen reduction to H O production, has strong oxidizing properties that potentially destabilize the catalyst. Therefore, avoiding accumulation ⋅O for its rapid conversion paramount significance improving catalyst stability yield. In this work, strategy was developed utilize protonated groups depletion converted , thereby efficiency from CN successfully enhanced by 47‐fold. experimental findings demonstrated polydopamine not only improved carrier separation efficiency, more importantly, provided adsorption active site efficient production. This work offers versatile approach synthesizing stable photocatalysts.

Language: Английский

---

Progress in preparation, identification and photocatalytic application of defective g-C3N4

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 510, P. 215849 - 215849

Published: April 11, 2024

Language: Английский

---

Crystalline carbon nitrides for photocatalysis

EES Catalysis, Journal Year: 2024, Volume and Issue: 2(2), P. 411 - 447

Published: Jan. 1, 2024

This review comprehensively summarizes the recent advances on crystalline carbon nitrides, including their preparation, optimization strategies, photocatalytic applications, as well challenges and prospects.

Language: Английский

---

Synergy between palladium single atoms and small nanoparticles co-anchored on carbon atom self-doped graphitic carbon nitride boosting photocatalytic H2 generation

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 345, P. 123680 - 123680

Published: Jan. 2, 2024

Language: Английский

---

Extended light absorption and accelerated charge migration in ultrathin twisted carbon nitride nanoplates for efficient solar hydrogen production

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(7), P. 2215 - 2223

Published: May 31, 2024

Language: Английский

---

Construction of Frustrated Lewis Pairs in Poly(heptazine Imide) Nanosheets via Hydrogen Bonds for Boosting CO₂ Photoreduction

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(36)

Published: June 7, 2024

The creation of frustrated Lewis pairs on catalyst surface is an effective strategy for tuning CO

Language: Английский

---