Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.

Construction of QuO/α-NaO-CoPc-Functionalized UiO-66-NH₂ and Its Mechanism for Efficient Synergistic Photocatalytic Mineralization of Congo Red .

yanbing Yin , xiaohui Li, Zhou Wang, Shuang Tan, Guohua Dong, Jun Cao, Yamin Xu

Abstract

In this study, quinolinoxy cobalt phthalocyanine (QuOCoPc) and naphthoxy cobalt phthalocyanine (α-NaOCoPc) were synthesized. Two novel composite photocatalysts, QuOCoPc@UiO-66-NH₂ and α-NaOCoPc@UiO-66-NH₂, were prepared by loading the respective phthalocyanines onto UiO-66-NH₂ via an impregnation method. The samples were characterized using techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). Using visible light as the light source and Congo Red (CR) solution as the target pollutant, the photocatalytic properties of the two composite materials were investigated. The results demonstrated that both composite catalysts exhibited excellent photocatalytic performance. Compared with the individual components QuOCoPc, α-NaOCoPc, and UiO-66-NH₂, the composites showed significantly enhanced catalytic degradation of CR. The degradation efficiencies of QuOCoPc@UiO-66-NH₂ and α-NaOCoPc@UiO-66-NH₂ reached 95.9% and 84.9%, respectively. These findings indicate a strong synergistic effect between the phthalocyanines and UiO-66-NH₂, with hydroxyl radicals (·OH) and superoxide radicals (·O₂⁻) playing crucial roles as the primary active species.

CH25062  Accepted 29 September 2025

© CSIRO 2025