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In this study, pure ZnO, CeO 2  and ZnO/CeO 2  nanocomposites were synthesized using a thermal decomposition method and subsequently characterized using different standard techniques. High-resolution X-ray photoelectron spectroscopy measurements confirmed the oxidation states and presence of Zn 2+ , Ce 4+ , Ce 3+  and different bonded oxygen species in the nanocomposites. The prepared pure ZnO and CeO 2  as well as the ZnO/CeO 2  nanocomposites with various proportions of ZnO and CeO 2  were tested for photocatalytic degradation of methyl orange, methylene blue and phenol under visible-light irradiation. The optimized and highly efficient ZnO/CeO 2  (90:10) nanocomposite exhibited enhanced photocatalytic degradation performance for the degradation of methyl orange, methylene blue, and phenol as well as industrial textile effluent compared to ZnO, CeO 2  and the other investigated nanocomposites. Moreover, the recycling results demonstrate that the ZnO/CeO 2  (90:10) nanocomposite exhibited good stability and long-term durability. Furthermore, the prepared ZnO/CeO 2  nanocomposites were used for the electrochemical detection of uric acid and ascorbic acid. The ZnO/CeO 2  (90:10) nanocomposite also demonstrated the best detection, sensitivity and performance among the investigated materials in this application. These findings suggest that the synthesized ZnO/CeO 2  (90:10) nanocomposite could be effectively used in various applications.

Ce3+-ion-induced visible-light photocatalytic degradation and electrochemical activity of ZnO/CeO2 nanocomposite