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Alireza Khataee,Dimitrios Kalderis,Parisa Yekan Motlagh,Vassilis Binas,Sofia Stefa,Michalis Konsolakis 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.95 No.-
Herein, novel Cu2O–CuO/HTC composites were prepared by hydrothermal precipitation employing ascarrier sawdust hydrochar carbonized at 200 C for 2, 6, and 12 h. The composites were used for theeffective sonocatalytic degradation of three dyes (Acid Blue 92 (AB 92), Acid Red 14 (AR 14) and AcidOrange 7 (AO 7)) with different molecular structure. To gain insight into the functional groups, crystallinestructure, elemental composition and optical characteristics of the Cu2O–CuO/HTC composites, FT-IR,XRD, EDX and UV–vis analyses were carried out. Also, the surface morphology and area of the Cu2O–CuO/HTC composites were investigated by SEM and BET analysis. The effect of different parameters, such asdye concentration, solution pH, and catalyst dosage on the sonodegradation process was examined. Among the as-prepared composites, the Cu2O–CuO/HTC-2 h sample exhibited the best performance,offering a degradation efficiency of 85.43% after 90 min. GC-MS analysis was in addition employed todetermine potential intermediates. To assess the mineralization of dye solution under optimumconditions, COD analysis was performed implying 77.77% removal efficiency. Additionally, the reusabilityand stability of the as-prepared composites were verified. The leaching copper concentration in theaqueous phase was measured within four consecutive runs.