Fenton-like reaction and photocatalysis using ferrous oxalate and g-C3N4 enhancing reactive oxygen species for dye wastewater degradation under visible-light irradiation
Shaomin Liu, Xiaoxiao Wang, Jianshu Zhang
Abstract
ABSTRACT In this study, a catalyst material consisting of g-C 3 N 4 and ferrous oxalate was synthesized via a simple and environment-friendly method. Then, the catalyst was characterized using various techniques. The photocatalytic performance of the catalysts in the degradation of Rhodamine B was evaluated under visible-light irradiation. Based on the experimental results, the combination of g-C 3 N 4 and ferrous oxalate was crucial to enhance the separation of charge carriers and improve the O 2 reduction under visible light. This process also promoted the production of hydroxyl radicals ( • OH). In the system, oxalate was used to assist the conversion between Fe 2+ and Fe 3+ , with the chelation of Fe 3+ to form a complex, to avoid the formation of sludge. Furthermore, without the addition of hydrogen peroxide (H 2 O 2 ), the system had efficient photodegradation with excellent effect. This study provided an innovative idea for the application of ferrous oxalate in photocatalysis and Fenton-like reaction.