Facile preparation of nitrogen and FeSx codoped porous carbon with high catalytic activity under alkaline condition

In this work, we reported the preparation of nitrogen and FeS x codoped porous carbon through hydrothermal treatment of FeCl 3 , thiourea and porous carbon. The degradation results demonstrated that PC-FeS x composite displayed high degradation efficiency towards organic dyes with excellent reusability. Moreover, the degradation efficiency under alkaline solution (pH = 11) is even better under acidic solution (pH = 3), indicating that other routes for generation free radicals were existed. Electron spin resonance (ESR) spin−trap technique was used to determine the free radical species and results demonstrated that both •OH and O 2 − are formed during Fenton reaction . Considered the facile operation procedure, low cost of reagents and high degradation efficiency, we believe this work should of broad interest for fabrication of multifunctional composites for environmental treatment.