A New Type of Composite Catalyst α-nBACoPc/SnO₂ Synergistic Photo-Catalytic Degradation of Dyes

The α-nBACoPc/SnO₂ composites were prepared using the in situ synthesis method and characterized by Fourier transform infrared (FT-IR), X-ray powder diff raction (XRD), X-ray photoelectron spectroscopy (XPS), and confirmed by the loading of amino cobalt phthalocyanine on SnO₂. Conduct photocatalytic degradation experiments used rhodamine B as a simulated pollutant. The composite exhibited a photo-catalytic degradation rate of 83.3%, which was higher than that of α-nBACoPc and SnO₂ alone. The Co–O bond in the composite material enhances the transfer of electrons from phthalocyanine to the SnO₂ conduction band, improving light utilization and strengthening the synergistic impact of cobalt phthalocyanine and SnO₂. Furthermore, the composites demonstrated good stability and recyclability.