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

• DOI: 10.1002/smll.202204793
• Publication Date: 2022-11-08T03:01:27Z
• Authors: Xiangwei Zhang; Chunquan Li; Xinlin Wang; Shanshan Yang; Ye Tan; Fang Yuan; Shuilin Zheng; Dionysios D. Dion...; Zhiming Sun
• Keywords: Reactivity; Degradation

Abstract Single‐atom catalysts (SACs) feature maximum atomic utilization efficiency; however, the loading amount, dispersibility, synthesis cost, and regulation of electronic structure are factors that need to be considered in water treatment. In this study, kaolinite, a natural layered clay mineral, is applied as support for g‐C 3 N 4 single Fe atoms (FeSA‐NGK). The FeSA‐NGK composite exhibits an impressive degradation performance toward target pollutant (>98% rate 10 min), catalytic stability across consecutive runs (90% reactivity maintained after three fluidized‐bed unit) under peroxymonosulfate (PMS)/visible light (Vis) synergetic system. introduction kaolinite promotes amount (2.57 wt.%), which 14.2% increase compared using bare catalyst without improved concentration vacancies, thereby optimizing atoms. It discovered successfully occupied five coordinated combined with neighboring vacancy. Consequently, regulated local atoms, drives electrons accumulate on centers. This study opens avenue design clay‐based SACs purification.