Fe Single ‐Atom Catalyst for Efficient and Rapid Fenton‐Like Degradation of Organics and Disinfection against Bacteria

Herein, an efficient and reusable Fenton-like catalytic system of a catalyst of single Fe atoms anchored on N-doped porous carbon and peroxymonosulfate is developed, which demonstrates excellent RhB degradation performance and bactericidal activity, being the first report on a Fenton-like system of single-atom catalysts for disinfection. AbstractThe Fenton-like reaction has great potential in water treatment. Herein, an efficient and reusable catalytic system is developed based on atomically dispersed Fe catalyst by anchoring Fe atoms on nitrogen-doped porous carbon (Fe SA/NPCs). The catalyst of Fe SA/NPCs exhibits enhanced performance in activating peroxymonosulfate (PMS) for organic pollutant degradation and bacterial inactivation. The Fe SA/NPCs + PMS system demonstrates a high turnover frequency of 39.31 min−1 in Rhodamine B (RhB) degradation as well as a strong bactericidal activity that can completely sterilize anEscherichia coli culture within 5  min. Meanwhile, the degradation activity of RhB by Fe SA/NPCs is improved up to 28 to 371-fold in comparison with the controls. Complete degradation of RhB can be achieved in 30 s by the Fe SA/NPCs + PMS system, demonstrating an efficiency much higher than most traditional Fenton-like processes. E xperiments with different radical scavengers and density functional theory calculations have revealed that singlet oxygen (1O2) generated on the N-coordinated single Fe atom (Fe-N4) sites is the key reactive species for the effect...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research