One-step synthesis of novel Ni-doped Cu-2(OH)(3)F 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 H2O2 for degrading organic pollutants in water. The prepared (Cu2-xNix)(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 H2O2 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 (Cu2-xNix)(2)(OH)(3)F and accelerated the separation of photogenerated electrons and hole pairs. Free radical capture experiments showed that center dot OH, h(+), and center dot O-2(-) all contributed to the reaction, and center dot 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. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

In this study, an effective Ni-doped Cu-2(OH)(3)F catalyst was synthesized for degrading organic pollutants in water. The introduction of Ni provided more active sites for H2O2 decomposition, and structural characterization and optical property analysis confirmed its high degradation performance.