Boosting Photocatalytic Performance of Polymeric Carbon Nitride by Adjusting its D-A Structure Via Group Modification Strategy DOI
Bei Wang,

Mingxiu Huang,

Meng Jiang

et al.

Published: Jan. 1, 2023

A new kind of group-modified polymeric carbon nitride (PCN) photocatalyst was synthetized with urea and 4-Nitro-o-phenylenediamine (NPD) by one-pot method applied to degrade bisphenol (BPA) in aqueous solution. The light response range had been extended a lot due conjugation electron withdrawing properties nitrobenzene. introduction nitrobenzene changed nanostructures PCN led an increased specific surface area. XPS EPR results proved that more sp2 N vacancies were introduced grafting Theoretical simulation demonstrated this group modification on beneficial for enhanced Donor-Acceptor (D-A) structures thus promotional charge separation. photocatalytic performance BPA degradation promoted 10 times than unmodified PCN. To verify the universality strategies, we prepared other two kinds photocatalysts via electron-withdrawing strategy their all improved obviously.

Language: Английский

Highly efficient Cr(VI) photoreduction by C/N vacancies and hydroxyl co-modified g-C3N4: The new insight into the key role of citric acid DOI
Juan Liang, Ningjie Fang, Chunqiong Liu

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150155 - 150155

Published: March 2, 2024

Language: Английский

Citations

21
Highly selective photocatalytic CO2 reduction and hydrogen evolution facilitated by oxidation induced nitrogen vacancies on g-C3N4 DOI
Zhengdong Xu, Yang Chen, Binghao Wang

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 651, P. 645 - 658

Published: Aug. 6, 2023

Language: Английский

Citations

35
Advanced oxidation via the synergy of C-defective/ C–O band modified ultrathin porous g-C3N4 and PMS for efficient photothermal degradation of bisphenol pollutants and lignin derivatives DOI Creative Commons
Liquan Jing, Meng Xie, Yuanguo Xu

et al.

Green Energy & Environment, Journal Year: 2023, Volume and Issue: 9(7), P. 1159 - 1170

Published: Jan. 30, 2023

This work uses thermal polymerization of urea nitrate, oxyacetic acid and as the raw material to prepare ultra-thin porous carbon nitride with defects C–O band (OA-UN-CN). Density functional theory (DFT) calculations showed OA-UN-CN had narrower gap, faster electron transport a new internal construction electric field. Additionally, prepared significantly enhanced photocatalytic activation peroxymonosulfate (PMS) due light absorption performance overflow. As result, OA-UN-CN/PMS could entirely degrade bisphenol A (BPA) within 30 min, where photodegradation rate was 81.8 7.9 times higher than that g-C3N4 OA-UN-CN, respectively. Beyond, likewise other pollutants sodium lignosulfonate efficiently. We suggested possible degradation pathways accordingly explored toxicity its products. provides idea on development advanced oxidation processes for treatment lignin derivatives, via metal-free photothermal-catalyst.

Language: Английский

Citations

31
Oxygen Vacancy-Modified BiOCl Nanoplates via Three Minutes Mannitol-Assisted Grinding Treatment for Excellent Photocatalytic Applications DOI
Xun Yang,

H.A. Habib,

Hui Yang

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(30), P. 11308 - 11318

Published: July 15, 2024

It remains an exciting challenge to achieve a direct production of oxygen vacancies (OVs) by the one-step grinding BiOCl visible-light-driven photocatalysts. Herein, nanoplates are synthesized via mannitol-assisted method, which exhibits efficient photocatalytic activity for CO2 reduction and degradation organic toxins. Different from previously reported water/solvatory thermal synthesis, reaction conditions mild preparation speed is fast. Compared with BiOCl, surface area modified BiOCl-1 enhanced 13.2 times has abundant pore structure. In addition, OVs introduced in nanoplates, reduce bandwidth promote separation charge carriers. The CO yield rate reached 27.2 μmol h–1 g–1, was 8.1 superior nonmodified (3.4 g–1). rhodamine B (20 mg L–1) BiOCl-0 only 51.7%, while that up 92.8%. This increases content narrows band gap, more conducive electron–hole pairs improves activity. 3 min no surfactant-free solid-phase suitable large-scale opens possibility industrial applications.

Language: Английский

Citations

11
Ascorbic acid enhanced CuFe2O4-catalyzed heterogeneous photo-Fenton-like degradation of phenol DOI
Junrui Feng, Ying Zhang

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(5), P. 111009 - 111009

Published: Sept. 13, 2023

Language: Английский

Citations

19
Ultratrace Aromatic Anhydride Dopant as Intermediate Island to Promote Charge Transfer of Graphitic Carbon Nitride for Enhancing the Photocatalytic Degradation of Rhodamine B DOI

Yuren Zhao,

Mingyue Sun,

Fang Zhou

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(3), P. 1858 - 1868

Published: Jan. 5, 2024

In this work, 0.75 wt ‰ 2,3-pyridinedicarboxylic anhydride (PDA) as a novel dopant was utilized to obtain modified graphitic carbon nitride with ultratrace doping (3MCN-PDA3) by facile thermal polymerization. Characterization of the microstructure, surface state, and porosity properties samples indicated that 3MCN-PDA3 has thinner sheet-like, larger-scale, tighter lamellar stacking structure than pristine (3MCN). Based on photo/electrochemical analysis, PDA formed an extended coplanar conjugated system anhydride-amine condensation heptazine rings, channels amide covalent bonds superconjugation solitary pair electrons nitrogen atoms synergistically promoted charge transport performance 3MCN-PDA3. Under visible light, photodegradation efficiency Rhodamine B (RhB) over reached 92.4% in 60 min realized almost entire removal 200 (99.2%), 1.43 times 3MCN. Furthermore, experimental results generalized density theory calculations confirmed acts intermediate molecular island constructs efficient carrier transfer pathway between different units. The indicate is promising candidate enhance through large-scale preparation application photocatalyst.

Language: Английский

Citations

6
Carbon Nitrides in Photoelectrochemistry: State of the Art and Perspectives Beyond Water Splitting DOI
Sirlon F. Blaskievicz, Juliana Lucca Francisco, Frank Marken

et al.

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(8), P. 3021 - 3038

Published: March 26, 2024

Photoelectrodes made from cost-effective materials are the most desired for practical photoelectrochemical (PEC) applications, aiming to help in imminent environmental crisis that urges an energetic transition. A prominent class of semiconductors polymeric carbon nitrides (PCN), which appear be eco-friendly solution particularly green hydrogen production through water splitting, value-added organic compounds obtention biomass upgrading, or CO2 reduction; even ammonia can obtained by PEC reduction N2. In this sense, monitoring dangerous species converting them into less toxic ones also performed using nitride-based electrodes. review, we provide overview basics PCN applications PEC, including commonly employed strategies enhance their performance. Additionally, discuss current state-of-the-art splitting as well lesser-explored areas such remediation, photoelectroanalytical sensing, and light-driven N2 reactions. Finally, present prospects material PEC.

Language: Английский

Citations

5
Cyano-modified poly(triazine imide) with extended π-conjugation for photocatalytic biological cofactor regeneration DOI
Jianhua Liu, Jiashu Li,

Fangshu Xing

et al.

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(4), P. 903 - 911

Published: Jan. 1, 2024

A unique extended π-conjugated system of cyano-modified PTI is strategically developed for biological cofactor regeneration.

Language: Английский

Citations

4
Manipulation of Oxygen Vacancies and Charge Transfer for Enhancing Visible–Near-Infrared Photodegradation DOI
Dongliang Li, Liqiang Deng, Huiyan Chen

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Photocatalytic degradation technology has drawn extensive attention due to its ability utilize light energy for pollutant degradation. However, the generation of superoxide and hydroxyl radicals under broad-spectrum confronts significant challenges. Herein, N-GQDs/TiO2–x was rationally designed by adjusting oxygen vacancies (Ov) densities constructing interfacial charge transfer channels. First, in situ XRD EPR investigations disclosed that lowering calcination temperature enabled easy formation rich vacancies. These introduced mid-gap states within bandgap TiO2–x, thereby facilitating efficient absorption. Meanwhile, increased Ov density enhanced electron transport facilitated escape TiO2–x. Moreover, an channel established between N-GQDs which effectively promoted photogenerated carriers. Because these structural electronic modifications, both ·OH ·O2– could be readily generated visible near-infrared irradiations. Notably, irradiation 470 nm LEDs, 99.3% acid chrome blue K (AcbK) degraded 120 min. This work emphasizes vital synergistic role charge-transfer channels, guiding design high-performance, full-spectrum photocatalysts environmental applications.

Language: Английский

Citations

0
Intense interaction between biochar/g-C3N4 promotes the photocatalytic performance of heterojunction catalysts DOI Creative Commons

Rundong Ma,

Yihui Sun, Hui Zhang

et al.

RSC Advances, Journal Year: 2024, Volume and Issue: 14(28), P. 19707 - 19717

Published: Jan. 1, 2024

Biochar/g-C 3 N 4 composite photocatalyst was prepared using ultrasonic method. The conductive biochar acts as a charge transfer channel, effectively suppressing the recombination of photo generated carriers in g-C .

Language: Английский

Citations

3