[Fenton-like Catalytic Removal of Organic Pollutants in Water by Framework Cu in Cu-AlO].

To address the problem of low activity for Fe-based Fenton-like catalysts at neutral pH, Cu-AlO Fenton-like catalyst was prepared by a simple co-precipitation method. The samples were characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance UV-vis spectra (UV-vis DRS). The results showed that both Cu and Cumainly existed in the bulk framework of AlO for Cu-AlO with appropriate Cu doping (lower than 4.77% Cu), forming the bond of Al-O-Cu, while excessive Cu doping in AlO (e. g. 7.58% Cu) could result in the occurrence of extraframework Cu species. The Fenton-like catalytic performance of the prepared samples was evaluated by the degradation of 2-chlorophenol (2-CP) and Rhodamine B (RhB). The results showed that the catalyst with framework Cu species had high catalytic activity and stability for the degradation of 2-CP and RhB. After reaction for 2 h, the degradation rate of 2-CP reached up to 54% over Cu-AlO(4.77% Cu) in the presence of HO, the corresponding TOC removal reached 49%, and the Cu release concentration was only 0.0255 mg·L. However, the existence of extraframework Cu in AlO would lead to the reduction of the catalytic performance. ESR analysis showed that·OH and HO/O were the primary active species.