Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163200 - 163200
Опубликована: Апрель 1, 2025
Язык: Английский
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(33)
Опубликована: Май 27, 2024
Triggering the lattice oxygen oxidation mechanism is crucial for improving evolution reaction (OER) performance, because it could bypass scaling relation limitation associated with conventional adsorbate through direct formation of oxygen-oxygen bond. High-valence transition metal sites are favorable activating oxygen, but deep pre-catalysts suffers from a high thermodynamic barrier. Here, taking advantage Jahn-Teller (J-T) distortion induced structural instability, we incorporate high-spin Mn
Язык: Английский
Процитировано
52
Energy & Fuels, Год журнала: 2024, Номер 38(10), С. 8406 - 8436
Опубликована: Май 1, 2024
As one of the best sustainable approaches for visible-light production hydrogen (H2) to meet energy demands, semiconductor-based photocatalysis has received broad interest in recent decades. The fundamental restrictions graphitic carbon nitride (g-C3N4) as a promising metal-free photocatalytic semiconductor water splitting, like insufficient harvesting and high electron–hole (e/h) pairs recombination, have limited its applications this goal. In regard, optical, charge separation, surface features g-C3N4 can be tuned via engineering C/N vacancies, which is reviewed here splitting by g-C3N4. Reports confirm that enhanced resulting from vacancies are helpful adsorption on surface, improving water-splitting kinetics. First Review, improvements structural optical characteristics introducing especially nitrogen will discussed illustrate better performance. Then, various strategies creating controlling reviewed. critical roles optimizing performance also described, finally advances defective oxidation addressed.
Язык: Английский
Процитировано
27
Journal of Colloid and Interface Science, Год журнала: 2024, Номер 677, С. 1120 - 1133
Опубликована: Июль 30, 2024
Язык: Английский
Процитировано
23
Advanced Functional Materials, Год журнала: 2024, Номер 34(40)
Опубликована: Июнь 28, 2024
Abstract In this work, nitrogen‐defective g‐C 3 N 4 with different nitrogen defect densities is synthesized for ciprofloxacin photocatalytic degradation. Compared pristine , etched NaBH 1 h exhibits an approximately ten‐fold increase in the rate constant of (CIP) The combined experimental analysis and theoretical calculations reveal that defects can be incorporated into all sites C─N═C most susceptible site. By incorporating to induce states between conduction band (CB) valence (VB), electronic structures are tuned. induced downshifted approach valance band, reaching increased density within optimum ranges accommodate excited electrons narrow bandgap, extend light absorption capability, enhance charge carrier separation transfer efficiency. by 2 over‐introduced a declined performance due deteriorated structure, over‐downshifted turn out new recombination center carriers.
Язык: Английский
Процитировано
19
AIChE Journal, Год журнала: 2025, Номер unknown
Опубликована: Янв. 23, 2025
Abstract Photoreforming waste plastics into valuable products is a promising approach, but it requires efficient, eco‐friendly photocatalysts and deeper understanding of catalytic mechanism. We have developed B‐doped g‐C 3 N 4 nanotube catalyst with well‐defined structure for photoreforming poly(ethylene terephthalate) (PET) chemicals H 2 . This achieved evolution rate 3240 μmol g catal −1 h , outperforming previous cadmium‐free catalysts. It also oxidized PET to higher‐value organic acids via hole oxidation Experimental theoretical calculations showed that B atom doping not only greatly increased the catalyst's active sites, significantly accelerated electron–hole separation transfer rate, optimized adsorption activation behavior substrate. Using concentrated sunlight, we 475 real‐world in seawater. Techno‐economic analysis suggests processing 50,000 tons plastic annually could yield profit $7.45 million.
Язык: Английский
Процитировано
11
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 10, 2024
Abstract Graphitic carbon nitride (g‐C 3 N 4 ) has witnessed tremendous research interest due to its narrow bandgap, intrinsic 2D structure, and abundant raw materials. Although g‐C some shortcomings such as low specific surface area, poor conductivity rapid charge carries recombination, various modification methods are constantly emerging enhance potential application value in photocatalysis. Increasing the crystallinity of is an effective strategy improve in‐plane separation efficiency. However, it also reported that amorphous possesses a higher adsorption activation ability over reactants richer functional groups than crystalline . Which type more suits photocatalysis, which method suitable for boosting activity two types , respectively? Based on these issues, recent advances preparation properties summarized, their performance improvement strategies overviewed thoroughly. Upon systematic comparison analysis, respectively, proposed. Their applications summed up especially environment remediation energy conversation. Finally, ongoing opportunities future challenges photocatalysis territory taken consideration.
Язык: Английский
Процитировано
13
Small, Год журнала: 2024, Номер unknown
Опубликована: Окт. 2, 2024
Abstract Oxygen vacancies (OVs) are widely considered as active sites in photocatalytic reactions, yet the crucial role of OVs S‐scheme heterojunction photocatalysts requires deeper understanding. In this work, at hetero‐interface regulated BiVO 4 ‐OVs/g‐C 3 N constructed. The Fermi‐level structures and g‐C lead to a redistribution charges interface, inducing an internal electric field which tends promote recombination photogenerated carriers interface. Importantly, introduction induces defect electronic states bandgap, creating indirect energy level that serves intermediator for carrier heterojunction. As result, degradation rate on Rhodamine B (RhB) tetracyclines (TCs) optimal sample is 10.7 11.8 times higher than bare one, hydrogen production also improved 558 µmol g −1 h . This work shows importance heterostructure photocatalysis from both thermodynamic kinetic aspects may provide new insight into rational design photocatalysts.
Язык: Английский
Процитировано
12
Carbon, Год журнала: 2024, Номер 226, С. 119177 - 119177
Опубликована: Апрель 27, 2024
Язык: Английский
Процитировано
11
Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(5), С. 113354 - 113354
Опубликована: Июнь 17, 2024
Язык: Английский
Процитировано
10
SusMat, Год журнала: 2024, Номер 4(5)
Опубликована: Июль 18, 2024
Abstract Single‐atom catalysts (SACs) have rapidly become a hot topic in photocatalytic research due to their unique physical and chemical properties, high activity, selectivity. Among many semiconductor carriers, the special structure of carbon nitride (C 3 N 4 ) perfectly meets substrate requirements for stabilizing SACs; they can also compensate defects C materials by modifying energy bands electronic structures. Therefore, developing advanced ‐based SACs is great significance. In this review, we focus on elucidating efficient preparation strategies burgeoning applications SACs. We outline prospective enhancing performance future. A comprehensive array methodologies presented identifying characterizing This includes an exploration potential atomic catalytic mechanisms through simulation regulation behaviors synergistic effects single or multiple sites. Subsequently, forward‐looking perspective adopted contemplate future prospects challenges associated with encompasses considerations, such as loading, regulatory design, integration machine learning techniques. It anticipated that review will stimulate novel insights into synthesis high‐load durable SACs, thereby providing theoretical groundwork scalable controllable field.
Язык: Английский
Процитировано
10