Two-dimensional layered carbon-based catalytic ozonation for water purification: Rational design of catalysts and an in-depth understanding of the interfacial reaction mechanism

Zilong Song, Jingyi Sun, Zhenbei Wang, Jun Ma, Yongze Liu, Francisco Javier Rivas, Fernando Juan Beltrán, Wei Chu, Didier Robert, Zhonglin Chen, Bingbing Xu, Fei Qi, Jolanta Kumirska, Ewa Maria Siedlecka, Amir Ikhlaq

Research output: Journal article publicationReview articleAcademic researchpeer-review

Abstract

This review renewed insight into the existing complex and contradictory mechanisms of catalytic ozonation by two-dimensional layered carbon-based materials (2D-LCMs) for degradation toxic refractory organics in aqueous solution. Migration and capture of active electrons are central to catalytic ozonation reactions, which was not studied or reviewed more clearly. Based on this perspective, the catalytic ozonation potential of 2D-LCMs synthesized by numerous methods is firstly contrasted to guide the design of subsequent carbon based-catalysts, and not limited to 2D-LCMs. Matching ROS to active sites is a key step in understanding the catalytic mechanism. The structure-activity relationships between reported numerous active sites and ROS evolution is then constructed. Result showed that [rad]OH could be produced by -OH, -C=O, -COOH groups, defective sites, immobilized metal atoms, doped heteroatoms and photo-induced electrons; and [rad]O2 could be produced by -OH groups and sp2-bonded carbon. The normalized model further be used to visually compare the contribution degree of various regulatory methods to performance improvement. More importantly, this review calls for 2D-LCMs-based catalytic ozonation to be studied without circumventing the issue of structural stability, which would lead to many proposals of catalysts and its involved catalytic reaction mechanism being meaningless.

Original languageEnglish
Article number155071
JournalScience of the Total Environment
Volume832
DOIs
Publication statusPublished - 1 Aug 2022

Keywords

  • Active centers
  • Catalytic ozonation
  • Electron transfer
  • Layered carbon materials
  • Water purification

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this