Activation of peroxymonosulfate by Fe-N complexes embedded within SBA-15 for removal of organic contaminants via production of singlet oxygen.

摘要: Persulfates are recognized as promising oxidants and an alternative to Fenton reaction for water treatment. However, activation methods in hand restrict the practical application. Herein, we explore possibility of Fe-N complexes being a catalyst persulfate first time. The denoted Fe-Im-SBA was synthesized from ferric chloride, imidazole, SBA-15 at high temperature. internal pore structure maintained well; Fe, N C elements evenly distributed on catalyst. This presents extraordinarily catalytic activity Rh B removal by PMS with rate that reached up 97.0% 5 min. It also performed well wide pH range complete ranged 0.5 10, suggesting stability this both acidic alkaline conditions. showed adaptability degrade different kinds pollutants, which could give attractive advantage environmental implications. Through X-ray absorption spectroscopies analysis, it shows active sites composed Fe-N4 Fe2–N2 sites. 1O2 were proved generate Fe-Im-SBA/PMS system serve major ROS. Meanwhile, graphitic carbon can accelerate transfer electrons, may be reason its performance.