Use of graphitic carbon nitrides as solar-light-driven photocatalysts for the reduction of p-nitrobenzoic acid DOI Creative Commons
Rubén López-Timoner, Antonio Arques, Ana M. Amat

et al.

Catalysis Today, Journal Year: 2024, Volume and Issue: 434, P. 114674 - 114674

Published: March 27, 2024

The use of graphitic carbon nitrides (g-C3N4) as photocatalysts for the reduction p-nitrobenzoic acid (PNBA) under simulated sunlight has been investigated. were synthesized through thermal polymerization melamine and urea. effects g-C3N4 precursor employed in synthesis, exfoliation treatment, addition sacrificial agents, pH conditions evaluated. It was found that presence carboxylic acids electron donors required to attain photocatalytic PNBA, while amines or alcohols did not lead any activity this purpose. Furthermore, it observed used synthesis nitride had a slight influence on activity, whereas treatment bulk materials exhibited favourable effect. best results obtained upon oxalic at = 3 using exfoliated materials, achieving these complete removal PNBA after ca. 60 min irradiation. Time resolved profiles p-aminobenzoic (PABA) agree with an initial form compound, followed by oxidation PABA reactive oxygen species formed reaction medium.

Language: Английский

The photocatalytic H2O2 production by metal-free photocatalysts under visible-light irradiation DOI

Xiahong Xu,

Yan Sui, Wen‐Tong Chen

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 341, P. 123271 - 123271

Published: Sept. 6, 2023

Language: Английский

Citations

84
Unveiling the photocatalytic potential of graphitic carbon nitride (g-C3N4): a state-of-the-art review DOI Creative Commons
Mahmoud A. Ahmed, Safwat A. Mahmoud, Ashraf A. Mohamed

et al.

RSC Advances, Journal Year: 2024, Volume and Issue: 14(35), P. 25629 - 25662

Published: Jan. 1, 2024

Graphitic carbon nitride (g-C 3 N 4 )-based materials have emerged as promising photocatalysts due to their unique band structure, excellent stability, and environmental friendliness.

Language: Английский

Citations

24
Metal‐Free Modification Overcomes the Photocatalytic Limitations of Graphitic Carbon Nitride: Efficient Production and In Situ Application of Hydrogen Peroxide DOI

Si Deng,

Weiping Xiong,

Gaoxia Zhang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(39)

Published: July 22, 2024

Abstract Graphitic carbon nitride (g‐C 3 N 4 ) assisted photocatalytic production of hydrogen peroxide (H 2 O has already attracted the interest many researchers due to its environmental sustainability. Nevertheless, inherent drawbacks g‐C limit progress. Metal‐free modification strategies, including nanostructure design, defect introduction, doping, and heterojunction construction, have been developed improve efficiency H production. Compared metal modification, metal‐free strategies avoid use precious metals leaching heavy ions, which advantages good stability friendliness. However, a comprehensive review from modified by is still lacking. This first recaps mechanism , photoexcitation, carrier separation redox reactions. Then, perspective advances in photocatalysts are presented, with special focus on kernel connection between different based pivotal stages Subsequently, recent applications ‐based for situ generated mainly water purification organic synthesis, briefly discussed. Finally, prospects envisioned hope that it will “something do” field

Language: Английский

Citations

20
Self‐Floating Photocatalytic System for Highly Efficient Hydrogen Peroxide Production and Organic Synthesis on Carbon Dots Decorated Conjugated Microporous Polymer DOI
Xueqing Li,

Guping Zhang,

Najun Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(28)

Published: Feb. 15, 2024

Abstract Photocatalytic oxygen (O 2 ) reduction to hydrogen peroxide (H O is considered be a promising method for energy storage. However, it suffers from the rapid recombination of carriers, limited solubility and slow diffusion , self‐decomposition H in traditional diphase systems. Here, self‐floating carbon dots/conjugated microporous polymer (CDs/CMP) photocatalytic system established production organic synthesis. Due D–π–A structure, porous hydrophobicity, CMP induced intramolecular charge transfer, exposed abundant reaction sites, enhanced adsorption. CDs act as “bridges” electron transmission regulate surface hydrophobicity CMP, further improving transfer optimizing interface. CDs/CMP exhibits high 8542.6 µmol g −1 h concurrent furoic acid at 2.22 m . This rate ≈90% higher than that system, exceeding all previously reported photocatalysts triphase Notably, achieves relative separation suppressing generated self‐decomposition. Theoretical calculations situ characterizations reveal mechanism evolution. provides insights into exploring application metal‐free heterogeneous reactions.

Language: Английский

Citations

19
Energy band engineering of graphitic carbon nitride for photocatalytic hydrogen peroxide production DOI Creative Commons
Tengyang Gao,

Degui Zhao,

Sàisài Yuán

et al.

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(11)

Published: July 9, 2024

Abstract Hydrogen peroxide (H 2 O ) is one of the 100 most important chemicals in world with high energy density and environmental friendliness. Compared anthraquinone oxidation, direct synthesis H hydrogen oxygen (O ), electrochemical methods, photocatalysis has characteristics low consumption, easy operation less pollution, broad application prospects generation. Various photocatalysts, such as titanium dioxide (TiO graphitic carbon nitride (g‐C 3 N 4 metal‐organic materials, nonmetallic have been studied for production. Among them, g‐C which are simple to synthesize functionalize, attracted wide attention. The electronic band structure shows a bandgap 2.77 eV, valence maximum 1.44 V, conduction minimum −1.33 theoretically meets requirements In comparison semiconductor materials like TiO (3.2 eV), this material smaller bandgap, results more efficient response visible light. However, photocatalytic activity yield were severely inhibited by electron‐hole pair recombination rate, utilization rate light, poor selectivity products. Although previous reviews also presented various strategies improve production, they did not systematically elaborate inherent relationship between control their structure. From point view, article focuses on engineering latest research progress On basis, strategy production proposed through morphology control, crystallinity defect, doping, combined other strategies. Finally, challenges industrialization discussed envisioned.

Language: Английский

Citations

16
Construction of a novel heteropoly molybdophosphate/graphitized carbon nitride s-scheme heterostructure with enhanced photocatalytic H2O2 evolution activity DOI
Xing Liu, Yudong Li, Kaifeng Lin

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 654, P. 1228 - 1239

Published: Oct. 25, 2023

Language: Английский

Citations

41
Recent advancements in graphitic carbon nitride based direct Z- and S-scheme heterostructures for photocatalytic H2O2 production DOI Creative Commons
Subrat Kumar Sahoo,

Lopamudra Acharya,

Lijarani Biswal

et al.

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(16), P. 4914 - 4973

Published: Jan. 1, 2024

This review summarizes advancements in g-C 3 N 4 -based direct Z and S-scheme heterostructures for solar H 2 O synthesis, exploring advanced characterization methods to verify the charge transfer mechanism.

Language: Английский

Citations

13
Enhanced scavenger-free photocatalysis-self-Fenton degradation performance over B-doped NVs modified g-C3N4 via promoting Fe(II)/Fe(III) cycle DOI
Tongtong Zhang,

Binhua Liu,

Qiangang Li

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 353, P. 128386 - 128386

Published: June 15, 2024

Language: Английский

Citations

12
Two-phase interfacial photocatalysis via amphiphilic Bi2WO6 to facilitate synchronous production and spontaneous separation of H2O2 and value-added organics DOI
Xiaobo Han, Wei Chen,

Xu Mao

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 345, P. 127397 - 127397

Published: April 5, 2024

Language: Английский

Citations

11
Hexagonal Hollow Porous Organic Framework Nanotubes for Efficient Photocatalytic H2O2 Production in Pure H2O under O2 Atmosphere DOI

Xiahong Xu,

Yan Sui, Wen‐Tong Chen

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(30), P. 11409 - 11418

Published: July 16, 2024

The production of hydrogen peroxide (H2O2) by combining photocatalytic oxygen (O2) reduction with water (H2O) oxidation is a satisfactory substitute for the industrial anthraquinone process. But efficiency H2O2 generation still low, especially in heterogeneous reactions, owing to poor mass transfer and weak H2O oxidation. Hereby, porous organic framework (BPYTEA-POF) hexagonal hollow nanotube structure was synthesized through 5,5′-dibromo-2,2′-bipyridine (BPY) reacting tris(4-ethynylphenyl)amine (TEA) Sonogashira coupling reaction without template, which contains 2,2′-bipyridine active site. BPYTEA-POF morphology hierarchical wall beneficial and/or diffusion substrate via siphonic effect; meanwhile, it benefits exposure catalytic site, boosts contact O2 site rapidly dissociates generated H2O2, thus improving efficiency. At same time, moiety capable effectually weakening O–H bonds promoting produce proton (H+); then, produced H+ were used efficient under additive-free condition. definite specific sites enhance initial rate up 3446 μmol gcat–1 h–1, condition visible-light irradiation (λ ≥ 400 nm) any additional additive.

Language: Английский

Citations

8