Electro-assisted heterogeneous activation of peroxymonosulfate by g-C3N4 under visible light irradiation for tetracycline degradation and its mechanism

Wang, Min; Kang, Jin Kyu; Li, Siyan; Zhang, Jian; Tang, Yiwu; Shuan, Liu; Liu, Jiayun; Tang, Pengpeng

doi:10.1016/j.cej.2022.135278

Cited by 70 publications

(13 citation statements)

References 66 publications

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“…The quenching agents of tertiary butanol (TBA), methanol (MeOH), p-benzoquinone (BQ), furfuryl alcohol (FFA), and EDTA-2Na were applied to scavenge •OH, •OH and SO 4 1 O 2 , and h + , respectively. [18] MeOH and TBA slightly inhibited the degradation of BPA, suggesting that •OH and SO 4…”

Section: Resultsmentioning

confidence: 99%

“…The degradation rate and kinetic constants proved that the efficient catalytic performance was attributed to the introduction of minerals (FiguresS21 and S22, Supporting Information), when compared with FeSA-NG, thus demonstrating the significant contributing strengthening role of the minerals.Generally, it is important and indispensable to explore whether catalysts undergo consecutive catalytic runs and can be used for cycling tests. A fluidized-bed catalytic unit was built in Small 2022,18, 2204793…”

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confidence: 99%

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Defect Engineering Modulated Iron Single Atoms with Assist of Layered Clay for Enhanced Advanced Oxidation Processes

Zhang

Wang

et al. 2022

Small

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Single‐atom catalysts (SACs) feature maximum atomic utilization efficiency; however, the loading amount, dispersibility, synthesis cost, and regulation of the electronic structure are factors that need to be considered in water treatment. In this study, kaolinite, a natural layered clay mineral, is applied as the support for g‐C3N4 and single Fe atoms (FeSA‐NGK). The FeSA‐NGK composite exhibits an impressive degradation performance toward the target pollutant (>98% degradation rate in 10 min), and catalytic stability across consecutive runs (90% reactivity maintained after three runs in a fluidized‐bed catalytic unit) under peroxymonosulfate (PMS)/visible light (Vis) synergetic system. The introduction of kaolinite promotes the loading amount of single Fe atoms (2.57 wt.%), which is a 14.2% increase compared to using a bare catalyst without kaolinite, and improved the concentration of N vacancies, thereby optimizing the regulation of the electronic structure of the single Fe atoms. It is discovered that the single Fe atoms successfully occupied five coordinated N atoms and combined with a neighboring N vacancy. Consequently, this regulated the local electronic structure of single Fe atoms, which drives the electrons of N atoms to accumulate on the Fe centers. This study opens an avenue for the design of clay‐based SACs for water purification.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Defect Engineering Modulated Iron Single Atoms with Assist of Layered Clay for Enhanced Advanced Oxidation Processes

Zhang

Wang

et al. 2022

Small

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“…Furthermore, 1 O 2 can be produced through the self-decomposition of PMS (Equation 17). [32] Therefore, under the combined influence of SO 4 *À , * OH, h + , 1 O 2 , and O 2 *À , phenol is degraded into H 2 O and CO 2 (Equation 18). This study investigated the photocatalytic degradation of phenol by examining potential intermediates generated during the process.…”

Section: Chemcatchem (6)mentioning

confidence: 99%

Peroxymonosulfate‐Assisted Phenol Degradation via a Magnetic Covalent‐Triazine‐Framework‐Based Photocatalyst

Wang

Cui

et al. 2023

ChemCatChem

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The development of efficient heterostructures combining covalent organic frameworks (COFs) and ideal semiconductors can significantly improve photocatalytic performance for pollutant degradation. Herein, we present the design, synthesis, and characterization of a core‐shell‐structured nanocomposite comprising covalent triazine framework‐encased Fe3O4 magnetic particles employed as a heterojunction photocatalyst for activating peroxymonosulfate (PMS) in phenol degradation. The distinctive internal structure between the TpMa shell (Tp=2,4,6‐trihydroxy‐1,3,5‐benzenetricarboxaldehyde, Ma=melamine) and the Fe3O4 core (Fe3O4@TpMa) facilitated charge transfer and accelerated charge separation. Furthermore, PMS served as an electron acceptor, enhancing photogenerated charge separation and maximizing the production of reactive oxygen species. The Fe3O4@TpMa/PMS system demonstrated remarkable photocatalytic performance and stability, achieving complete phenol degradation (10 mg L−1) in 40 min. The exceptional photocatalytic activity resulted from the synergistic effect of ⋅OH, SO4⋅−, O2⋅−, 1O2, and h+ generated in the Fe3O4@TpMa/PMS system during the degradation process. Overall, this material offers excellent potential for solar‐driven pollutant degradation and enables the development of COF‐based materials for wastewater treatment applications.

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“…These PCMP experiments were primarily based on the light-assisted Fenton reaction, where H 2 O 2 was catalyzed to produce strong oxidizing ·OH radicals that react with the material surface, forming an oxide layer or a passivation layer. Numerous environmental studies − have shown that persulfate can generate sulfate radicals (SO 4 – ·) and ·OH through light, heat, and transition metal activation. Compared to ·OH generated by the Fenton reaction, SO 4 – · exhibits a higher redox potential, a broader pH range, and a longer half-life.…”

Section: Introductionmentioning

confidence: 99%

Insight into Polishing Slurry and Material Removal Mechanism of Photoassisted Chemical Mechanical Polishing of YAG Crystals

Zhang,

Guo,

Wang

et al. 2023

Langmuir

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Electro-assisted heterogeneous activation of peroxymonosulfate by g-C3N4 under visible light irradiation for tetracycline degradation and its mechanism

Cited by 70 publications

References 66 publications

Defect Engineering Modulated Iron Single Atoms with Assist of Layered Clay for Enhanced Advanced Oxidation Processes

Defect Engineering Modulated Iron Single Atoms with Assist of Layered Clay for Enhanced Advanced Oxidation Processes

Peroxymonosulfate‐Assisted Phenol Degradation via a Magnetic Covalent‐Triazine‐Framework‐Based Photocatalyst

Insight into Polishing Slurry and Material Removal Mechanism of Photoassisted Chemical Mechanical Polishing of YAG Crystals

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