Improving the Photocatalytic Performance of Porous Ceria under Visible Light Illumination via Mn Incorporation

Porous cerium oxide (ceria) nanoparticles were prepared with and without manganese (Mn) by using the flash combustion technique. Samples different loadings (Ce/Mn ratio ranged from 100 to 10) a one-step process water only as solvent. Moreover, citric acid was utilized fuel in an aqueous medium, overall synthesis mixture dried at °C overnight then calcinated 550 for 3 h. The obtained final solid product characterized inductively coupled plasma (ICP), X-ray powder diffraction (XRD), diffuse reflectance ultraviolet-visible spectroscopy (DR-UV-Vis), scanning electron microscopy (SEM), which Energy Dispersive X-Ray Analysis (EDX), high resolution transmission (HR-TEM), photoluminescence (PL) analysis. characterization data showed that Mn ions totally incorporated into framework of ceria up applied loading. Under visible light illumination, photocatalytic activity samples tested decolorization reaction methyl green (MG) dye (wavelength greater than 425 nm). results increasing content improved ceria. sample Ce/Mn 10 performed 1.8 times better bare porous Finally, reusability best-performing investigated four consecutive runs treatment, slight deactivation monitored after fourth run.