Methods and Prospects for Enhancing Heterogeneous Fenton Catalytic Activity

Abstract As an advanced oxidation process that can efficiently remove organic pollutants in water, Fenton oxidation has attracted much attention in recent years. Compared to homogeneous Fenton, it has a wider applicability, a wide pH range, higher degradation efficiency, lower environmental impact, and lower treatment cost. However, the heterogeneous Fenton reaction also has some limitations, such as the deactivation of the catalyst, the reaction rate being limited by the solid–liquid interface mass transfer. Therefore, the development of efficient and stable heterogeneous Fenton catalytic system is the focus of Fenton reaction research at present. In this paper, the research of heterogeneous Fenton catalysis are introduced, and the construction characteristics and catalytic mechanism of iron base, copper base, transition metals and their oxides, chelating agents, carbon materials, supported catalysts, and photocatalysis are systematically summarized. In addition, the strategies for the formation of Fe II and the promotion of H 2 O 2 decomposition were discussed, and the mechanism and pathway of the heterogeneous Fenton catalyst for the efficient degradation of organic matter were summarized in order to provide technical support for further research on heterogeneous Fenton catalysts.