Activation of persulfate on fluorinated carbon : Role of semi-ionic C-F in inducing mechanism transition from radical to electron-transfer nonradical pathway

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Feng Ye
  • Yinmei Su
  • Ruipeng Li
  • Wei Sun
  • Mengjie Pu
  • Cao Yang
  • Wenchao Yang
  • Haiming Huang
  • Jonathan W.C. Wong

Detail(s)

Original languageEnglish
Article number122992
Journal / PublicationApplied Catalysis B: Environmental
Volume337
Online published12 Jun 2023
Publication statusPublished - 15 Nov 2023

Abstract

Carbon-driven nonradical persulfate activation exhibits compelling advantages due to its good reactivity in complex aquatic surroundings. However, uncertainties still exist in the construction of nonradical-oriented activation systems and the role of positively charged carbon is ambiguous because of intricate carbon structure. In this regard, this study found that F-doping strategy not only improved the catalytic activity of carbon material, but also switched free radical persulfate (PS)-activated process into the electron-transfer-based nonradical process. The CF-1.0 achieved the promising performance in degrading bisphenol A (BPA) with a removal rate of 99.5% within 60 min, where the percentage of electron transfer contribution was up to 73.27%. Based on the Bader charge analysis in density functional theory (DFT) calculation, the “electron-loss” induced catalytic mechanism was proposed. Stimulated by the incorporation of F atom that can create the electron-deficient carbon layer, the electron-rich BPA tended to transfer electrons to carbon-activated persulfate complex (C-S2O82-*), in an effort to balance the electron loss in the carbonaceous matrix, thereby realizing the oxidative degradation of pollutant. Quantitative structure-activity relationships (QSARs) indicated that semi-ionic C-F, C-OH, and structural defects could function as electron transfer channel, SO4/ OH, and 1O2 formation sites, respectively. In addition, the catalytic behaviors towards periodate (PI) were also investigated in detail. Overall, this research develops nonradical reaction-targeted fluorinated carbocatalyst for persulfate activation and deepens the understanding of positively charged carbon in electron-transfer regime. © 2023 Elsevier B.V.

Research Area(s)

  • Electron transfer, Fluorinated carbon, Persulfate, Positively charged carbon, Semi-ionic C-F

Citation Format(s)

Activation of persulfate on fluorinated carbon: Role of semi-ionic C-F in inducing mechanism transition from radical to electron-transfer nonradical pathway. / Ye, Feng; Su, Yinmei; Li, Ruipeng et al.
In: Applied Catalysis B: Environmental, Vol. 337, 122992, 15.11.2023.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review