One-step synthesis of novel Ni-doped Cu2(OH)3F Fenton-like catalyst driven by visible light: Single activity and synergistic effect enhanced by bimetallic cooperation

In this study, an effective Ni-doped Cu 2 (OH) 3 F was synthesized by a simple one-step hydrothermal method to activate H 2 O 2 for degrading organic pollutants in water. The prepared (Cu 2−x Ni x ) 2 (OH) 3 F showed significant degradation performance for the degradation of RhB and TC. The characterization methods of XRD, XPS , TEM , SEM, FT-IR proved that Ni successfully replaced part of the Cu in Cu 2 (OH) 3 F site and provided more active sites for decomposition of H 2 O 2 through the synergistic effect of the bimetal . Besides, the photochemical properties of the prepared catalysts were analyzed by UV–vis, electrochemical impedance spectroscopy and transient photocurrent, which confirmed that the introduction of Ni narrowed the band gap of (Cu 2−x Ni x ) 2 (OH) 3 F and accelerated the separation of photogenerated electrons and hole pairs. Free radical capture experiments showed that •OH, h + , and •O 2 - all contributed to the reaction, and •OH was the main active substance. This research provides a photo-Fenton-like catalyst with simple synthesis, high performance and stable properties for future sewage treatment.