Bandgap engineering and plasmonically enhanced sun light photocatalyis in Au/Cd1−xZnxS nanocomposites

Metal nanoparticles-decorated semiconductor nanomaterials generally hold a series of advantages especially enhanced electron–hole pair lifetime and thus exhibit superior solar energy conversions. In this study, we report facile solution processing Au-decorated Cd1−xZnxS, where x = 0, 0.25, 0.5, 0.75, 1, nanocomposites their photocatalytic activity against methylene blue (MB) dye degradations. The Au/CdZnS were investigated for structural, morphological, optical, properties. XRD patterns indicated that the crystalline sizes CdZnS are found to fall within 1–3 nm. electron microscopic images publicized average particle size Cd0.25Zn0.75S is 5 bandgap values pristine CdS, ZnS, Cd0.75Zn0.25S, Cd0.5Zn0.5S, 2.21 eV, 3.4 2.29 2.31 2.53 respectively. optical band gap Cd1−xZnxS have got reduced Au incorporation due occurrence red shift visible region absorption Au. light effect has been evaluated with MB degradation reaction under sunlight exposure. nanocompound had exhibited 97% molecules which 20% higher than bare nanocompound.