Research on micro-structure and catalysis properties of nanosized Ce1−x(Fe0.5Eu0.5)xO2−δ solid solutions

(a) UV-visible diffuse reflectance spectra of Ce1-x(Fe0.5 Eu0.5)xO2−δ samples, (b) energy dependence of (hvα)2 of Ce1-x(Fe0.5Eu0.5)xO2−δ samples from the UV-vis diffuse spectra, inset shows the dopant content dependence of band-gap energies