MXenes as heterogeneous Fenton-like catalysts for removal of organic pollutants: A review

Advanced oxidation processes (AOPs) are promising techniques for treatment of wastewater containing organic pollutants. MXenes as a new class of two-dimensional transition metal carbides exhibit unique characteristics and attract considerable attention as heterogeneous Fenton-like catalysts. This work provides a review on the Fenton-like degradation of organic pollutants using MXene-based materials. The synthesis methods of MXenes is described, as well as the representative properties of MXenes. The research advances on Fenton-like degradation of organic pollutants are summarized from the perspective of peroxide-based system, persulfate-based system, photo-Fenton system, and sono-Fenton system. The catalyst design, catalytic performance, and reaction mechanism of various catalysts are depicted in details. Additionally, the effects of process factors on catalytic performance are discussed. Challenges and perspectives of MXene-based catalysts for removal of organic pollutants are also discussed. Current researches prove the promising application of MXenes as potential Fenton-like catalysts. This work shed lights on the application of MXene materials in Fenton-like processes for future researches. • MXenes as Fenton-like catalysts for removal of organic pollutants gains growing attention. • The progress on synthesis methods and properties of MXenes is summarized. • The catalyst Cu/FeNPs@PC is magnetic and has good stability and reusability. • The catalytic performance and reaction mechanism of MXene catalysts are discussed in details. • Challenges and perspectives of MXene-based catalysts for removal of organic pollutants are depicted.