Photocatalysis-self-Fenton system with high-fluent degradation and high mineralization ability

Fenton technology has been seriously restricted by the external addition of H2O2 and low mineralization efficiency for organic pollutants. Herein, a photocatalysis-self-Fenton system was constructed to achieve high-fluent degradation and high mineralization performance, based on in-situ generated H2O2 over graphitic carbon nitride (g-C3N4) under visible-light irradiation. The degradation activity for 2,4-dichlorophenol (2,4-DCP) was enhanced by 20.5 and 3.7 times, compared to bulk-g-C3N4 photocatalysis and Fenton technology, respectively. Meanwhile, the corresponding mineralization degree was 22.5 and 3.8 times higher, respectively. The high-fluent degradation and high mineralization ability were ascribed to the highly efficient utilization of H2O2 via in-situ generation and consumption, which sustainably produced abundant (OH)-O-center dot radials. Briefly, the photocatalysis-self-Fenton system proposed here provides new insight into effectively and environmentally friendly removing the organic containment.