Synthesis and characterization of CdS/CuAl2O4 core–shell: application to photocatalytic eosin degradation

摘要: The advantages of the hetero-junction CdS/CuAl2O4 for photocatalytic eosin degradation are reported. Composite semiconductors elaborated by co-precipitation CdS on spinel CuAl2O4 giving a core–shell structure with uniform dispersion and intimate contact nanoparticles inside hexagonal CdS. Mott–Schottky plots (C−2–V) both materials show linear behaviors from which flat band potentials determined. photoactivity increases increasing mass sensitizer best performance is achieved (85 %/15 %). pH has strong influence peaks at 7.78. dark adsorption weak (~4 %), hence change in concentration attributed to process. follows zero-order kinetic rate constant 5.2 × 10−8 mol L−1 mn−1 while that photolysis seven times lower (0.75 mn−1).