• 文献标题:   Efficiency and mechanism analysis of bisphenol A degradation by sulfur-doped graphene-catalyzed peroxydisulfate
  • 文献类型:   Article
  • 作  者:   HU TF, CHEN S, ZHANG Q, HONG JM
  • 作者关键词:   sulfurdoped graphene, peroxydisulfate catalysi, mechanism, bisphenol a
  • 出版物名称:   APPLIED SURFACE SCIENCE
  • ISSN:   0169-4332 EI 1873-5584
  • 通讯作者地址:  
  • 被引频次:   6
  • DOI:   10.1016/j.apsusc.2021.151429 EA OCT 2021
  • 出版年:   2022

▎ 摘  要

For peroxydisulfate (PDS) catalysis, although the catalysis performance of sulfur-doped graphene (SG) is recognized, the underlying mechanism remains open for further discussion. In this work, three steps of PDS activation were novelty divided. In step 1, the adsorption and electron-seizing reaction between SG and PDS by confirmed by Fourier transform infrared spectroscopy, electrochemical analysis and density functional theory (DFT). Then (step 2), the dominant C = O and C-S-C functional groups in SG initial for further reactive species generation was identified by Density functional theory calculations. The production of surface-bond complex led to the breakage of O-O bonds to generate highly reactive species which were then analyzed by quenching experiments and electron paramagnetic resonance analysis. The source of O-center dot(2)- and O-1(2) were determined as S2O82- hydrolysis/dissolved oxygen activation and O-center dot(2)- recombination/O-center dot(2)- hydrolysis. In step 3, BPA-pathway degradation under free-radical and non-radical functions were deduced to confirm the function of reactive species. This work discovered an efficient SG catalyst and deepened the understanding on the mechanism of SG-activated PDS.