Thiophene Functionalized Linear Conjugated Polymer toward High-Performance Photocatalytic H2O2 Production DOI
Yuntong Li, Jiayi Wan, Yan Sui

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

Metal-free polymeric photocatalysts with tunable building blocks, ample redox-active centers, and exceptional light-harvesting capability have emerged as promising candidates for generating hydrogen peroxide (H2O2) through the oxygen reduction reaction (ORR) water oxidation (WOR). The slow kinetics of WOR process coupled rapid charge recombination nevertheless impedes efficient generation H2O2. Herein, a thiophene functionalized linear conjugated polymer (DEB-Tp-S2) was fabricated effective overall H2O2 photoproduction. DEB-Tp-S2 exhibits high initial photocatalytic yield rate 2762 μmol g–1 h–1 in absence sacrificial additives possesses outstanding cycling stability. Experimental density functional theory (DFT) results exhibit that moieties can reduce strength O–H bond H2O, which promotes 4e– process, thereby suppressing improving proton supply. This work reveals indispensable role chemical structure engineering optimizing their offers fresh insights into design achieving production.

Language: Английский

Elucidating Unique Synergic Enhancement Effect for H2O2 Production in Crystalline Carbon Nitride with Cyanamide‐Defect and Heptazine‐Triazine Junction DOI Open Access

Changxuan Shi,

Ronglan Pan,

Jili Yuan

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract Cyanamide‐defect and heptazine/triazine (H/T) junction in g‐C 3 N 4 (CN) have commonly been considered as an effective strategy for solar‐driven artificial H 2 O photosynthesis. However, their synergistic effect is still ambiguous regarding how to manipulate free electrons effectively participate the reduction . Herein, through alkali‐salt‐assist‐thermal polymerization approach, a series of samples with cyanamide‐defect, H/T aredeveloped. Subsequently, it demonstrated that appropriate ratio cyanamide defect crystalline CN can respectively facilitate formation at shorter longer lifetime scales due different strength driving forces. These synergically direct 2e − stepwise radical process efficient production. Eventually, elucidate optimal photocatalyst, owing its structure proper defect, achieved remarkable yield 60.03 mmol h −1 g quantum efficiency 43.7% 420 nm solar‐to‐chemical‐conversion 2.55% under AM 1.5G irradiation. This work will open bright avenue design organic photocatalysts charge carriers engaging surface reaction.

Language: Английский

Citations

0
Functional Groups‐Regulated Organic Semiconductors for Efficient Artificial Photosynthesis of Hydrogen Peroxide DOI Open Access
Xiaohui Yu, Zhen Wei, Yuan Qin

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Hydrogen peroxide (H 2 O ) is an environmentally friendly reagent, and organic semiconductors (OSCs) are ideal photocatalysts for the synthesis of H due to their well‐defined molecular structure, strong donor‐acceptor interactions, efficient charge separation. This review discusses regulatory mechanisms functional group modifications in tuning photocatalytic performance OSCs, highlighting relationship between structure catalytic performance. For example, electron‐regulating groups, such as cyano halogen, induce dipoles, facilitating migration photogenerated electrons. Fluorine groups optimize band prolong carrier lifetime high electronegativity. π‐Conjugated extension like anthraquinone thiophene, expand conjugation, improve visible light capture, stabilize intermediates through redox cycles. Hydroxyl enhance surface hydrophilicity promote activation, while imine bond protonation adjusts distribution improves selectivity cycle stability. Multi‐active site sulfonic acid amide, accelerate reaction kinetics inhibit decomposition. Functional absorption, separation, reactions electronic regulation, intermediate adsorption optimization, proton‐electron transfer. Future work should integrate machine learning identify optimal combinations develop green functionalization strategies photocatalyst synthesis.

Language: Английский

Citations

0
Nonbonded Electronic Coupling between Au and Phenolic Hydroxyl Groups in Resorcinol‐Formaldehyde Resin: Enhanced Interfacial Charge Transfer and H2O2 Photosynthesis DOI Open Access

Yuyang Tang,

Wuming Wang, Jiaqi Ran

et al.

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Harnessing sunlight for the direct generation of hydrogen peroxide (H 2 O ) from water and air presents a significant challenge in sustainable chemistry.Resorcinol‐formaldehyde (RF) resins, as emerging donor–acceptor (D‐A) polymeric photocatalysts, encounter limitations stemming inefficient charge transfer. This study introduces design synthesis noble metal (Au, Ag, Pt) nanoparticle‐modified RF with specific focus on Au‐RF due to its exceptional photocatalytic activity. The electronic coupling at interface between Au nanoparticles CO bonds phenolic hydroxyl groups resin facilitates efficient transfer, leading remarkable improvement performance, which is attributed interfacial interactions rather than surface plasmon resonance effects. optimized composite demonstrates record H production rate 252.28 μmol g −1 h solar‐chemical conversion efficiency 1.23% after 6 h, significantly surpassing that pristine resin. research paves way development D‐A photocatalysts under solar irradiation.

Language: Английский

Citations

0
Enhancing photocatalyst stability for hydrogen peroxide synthesis through promoting oxygen-centered organic radical formation DOI
Pan Jiang,

Chen Zuo-ming,

Huijie Yan

et al.

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Language: Английский

Citations

0
Metal-free catalysts for hydrogen peroxide production with electrocatalysis and photocatalysis DOI
Qing Hu, Maocong Hu,

Zhenhua Yao

et al.

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121621 - 121621

Published: April 1, 2025

Language: Английский

Citations

0
Structural design and property regulation of organic polymers for photocatalytic synthesis of H2O2 DOI Creative Commons
Mingyang Xu,

Rongchen Shen,

Y. L. Mo

et al.

InfoScience., Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Hydrogen peroxide (H 2 O ), an environmentally benign oxidizer, finds extensive applications in pulp bleaching, wastewater treatment, and medical sterilization. Photocatalytic H synthesis via water oxygen activation on semiconductor surfaces presents a sustainable production strategy. Notably, structurally tunable organic photocatalysts have emerged as promising candidates, which targeted molecular engineering can boost the photocatalytic performance by enlarging specific surface areas, extending light absorption ranges, facilitating charge carrier transport‐separation dynamics. Given growing significance of synthesis, comprehensive review this field has become imperative. This paper offers systematic examination visible‐light‐driven using various photocatalysts, including graphitic carbon nitride (g‐C 3 N 4 resorcinol‐formaldehyde (RF) resin, covalent frameworks (COFs), linear conjugated polymers (LCPs). The focus lies fundamental mechanistic elucidation, design reaction pathways active sites, modification strategies, establishment efficient systems. Extensive studies correlated efficiency with interfacial electron transfer kinetics spatial separation. Therefore, we methodically analyze key determinants governing photogenerated dynamics present strategies for enhancement. Furthermore, discuss emerging application scenarios enabled generation. Importantly, critically evaluates persistent challenges cutting‐edge solutions visible‐light‐mediated ultimately providing principles developing high‐efficiency photocatalysts.

Language: Английский

Citations

0
Bio-inspired copper complexes with Cu2S cores: (solvent)effects on oxygen reduction reactions. DOI Creative Commons

Jordan Mangue,

Iris Wehrung,

Jacques Pécaut

et al.

Dalton Transactions, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The need for effective alternative energy sources and "green" industrial processes is a more crucial societal topic than ever. In this context, mastering oxygen reduction reactions (ORRs) key step to develop fuel cells or propose alternatives energy-intensive setups such as the anthraquinone process hydrogen peroxide production. Achieving goal using bio-inspired metal complexes based on abundant non-toxic elements could provide an environmentally friendly option. Given prevalence of Cu-containing active sites capable reductive activation dioxygen in nature, development Cu-based catalysts ORR thus appears be relevant approach. We herein report preparation, full characterization (TD)DFT investigation new dinuclear mixed-valent copper complex 6 exhibiting Cu

Language: Английский

Citations

1
Construction of Pyrrolo[3,2-b]pyrrolyl-linked Covalent Organic Polymers to Promote Continuous Overall H2O2 Production DOI
Yingguo Li,

Jialun He,

Chensheng Wang

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110397 - 110397

Published: Oct. 1, 2024

Language: Английский

Citations

1
Covalent Organic Framework Encapsulating Layered Oxide Perovskite for Efficient Photosynthesis of H2O2 DOI
Yuan Teng, Jing Zhao, Zi‐Ming Ye

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Abstract Driving efficient artificial photosynthesis of H 2 O is highly desirable in both academic and industrial fields. Here, a new core–shell Bi 3 TiNbO 9 @C 4 N heterojunction constructed for photocatalytic production by situ encapsulating an ultrathin layer covalent organic framework material (C N) on Aurivillius‐type microsheets. The porous C found to enhance visible‐light absorption ability facilitate the adsorption activation reactants intermediates. hybrid follows S‐scheme charge transfer with assistance strong internal electric field (IEF), which promotes spatial separation photogenerated carriers effectively maintains their redox abilities. As result, optimized unveils high yield rate 1.25(2) mmol g −1 h absence sacrificial agents cocatalyst, 10.9 3.5 folds higher than those pristine catalysts, respectively. This work provides strategy decorate frameworks (COFs) oxide perovskites , may stimulate intensive investigation interests functional materials/COFs materials various photocatalysis applications.

Language: Английский

Citations

1
Structure and Defect Engineering Synergistically Boost Mo6+/Mo4+ Circulation of Sv-Mos2 Based Photo-Fenton-Like System for Efficient Levofloxacin Degradation DOI
He Bai, Yuxiang Yang, Mengyang Dong

et al.

Published: Jan. 1, 2024

The circulation of redox pairs solely based on peroxymonosulfate (PMS) is slow and inefficient. Herein, urchin-like Sv-MoS2 were in situ deposited defect-rich NBC-C3N5 surfaces via hydrothermal method. inherent defects the NBC-C3N5@Sv-MoS2 (NCM) Sulfur vacancy (Sv) induces electrons to inject Mo sites directionally a "stabilize-then-accelerate" strategy, ultimately realize self-regeneration site. Experimental Density functional theory (DFT) calculation results demonstrate that NCM could effectively activate PMS generate •OH SO4•- for degradation Levofloxacin (LFX) with presence Visible light, fabrication greatly prolongs length peroxy bond (O-O) increases electron flux, leading superior radical generation compared 1O2. Furthermore, experimental investigation reactors stirring devices within system demonstrates promising applications water environment remediation.

Language: Английский

Citations

0