▎ 摘　　要

To prepare a high-performance catalyst for heterogeneous catalytic ozonation (HCO) of atrazine (ATZ, a re-fractory pollutant) in water, graphene nanoparticles (GNPs) were successfully prepared by facile in situ pyrolysis method. Waste polyvinyl alcohol film was chosen as carbonaceous precursor in a "waste-to-treasure" strategy. By introducing boron (B) in the synthesis, the obtained B-doped GNPs (B-GNPs) exhibited more robust HCO per-formance. The ATZ degradation efficiencies by ozonation, GNPs, and B-GNPs catalytic ozonation after 10 min were 40.2 %, 69.8 %, and 83.2 %, respectively. In contrast to ozone activation in GNPs induced by oxygenated defects, boronated defects dominated ozone decomposition and subsequent reactive oxygen species generation (center dot OH and center dot O2-), imparting B-GNPs with greater activity and stability. Generally, B-doping promoted the electron transfer of B-GNPs, thus enhancing ozone adsorption and degradation. Also, the effect of various water matrices on ATZ degradation during HCO was comprehensively evaluated. Acute toxicity tests indicated rapid detoxifi-cation through deep ATZ degradation by B-GNP-catalyzed ozonation. This study provides a robust and efficient carbonaceous catalyst based on a "waste-treats-waste" strategy for environmental remediation, thereby providing insights into the mechanism and application of heteroatom-doped carbonaceous catalysts for the HCO process.