Enhanced photo-Fenton degradation of contaminants in a wide pH range via synergistic interaction between 1T and 2H MoS2 and copolymer tea polyphenols/polypyrrole

Our successfully prepared an efficient photo-Fenton composite catalyst, denoted as 1T-2H MoS2@TP/PPy (MTP), by copolymerizing tea polyphenol (TP) and polypyrrole (PPy) onto the surface of 1T-2H MoS2. The inclusion of tea polyphenol and the iron coupling structure (TP-Fe2+/Fe3+) not only resolved the iron source issue but also significantly broadened the pH range within which MTP operates effectively. The introduction of PPy brought about remarkable improvements in the catalyst's stability, and it played a pivotal role in modifying the energy band structure of 1T-2H MoS2, thus facilitating the separation of photogenerated electron-hole pairs. Additionally, elevating the solution temperature promotes the photo-Fenton process.