Preparing copper catalyst by ultrasound-assisted chemical precipitation method.

In this paper, preparing copper catalyst by ultrasound-assisted chemical precipitation method is investigated. The used equipment is JP-020 ultrasonic cleaner, power and frequency are 180 W and 40 kHz respectively. Under the action of ultrasound, CuSO4·5H2O is reduced by ascorbic acid to obtain copper. The products are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and catalytic performance test. The results show that the morphology of copper products is rod-like and irregular granular. Copper catalyst has good catalytic oxidation performance for dyes methylene blue, crystal violet, alizarin red and Rhodamine B. The catalytic efficiency of 10 mg catalyst copper to 6 mg/L methylene blue reaches 98.1%, and the catalytic efficiency of the catalyst increases with the increase of catalyst dosage and the decrease of dye solution concentration. In addition, the new preparation techniques for Cu-based catalysts based on coprecipitation method are compared. Finally, the development trend of the new technology of copper-based catalyst preparation based on coprecipitation method is pointed out.