Hongbo Zhang, Jing Qiao, Meng Zhang, Siyi Li Jun Wang

College of Chemistry, Liaoning University

Guanshu Li, Youtao Song

School of Environment,Liaoning University

Abstract

The coated Z-scheme Pd-BaZrO₃@WO₃ composite as a new-type sonocatalyst is first prepared. The sonocatalytic activity is evaluated through the degradation of diazinon under ultrasonic irradiation. Some influencing factors such as Pt-BaZrO₃ and WO₃ mass ratios, ultrasonic irradiation time, used times and catalyst dosage are investigated in detail. The main intermediate products are detected in the degradation process of diazinon. The possible mechanism of sonocatalytic degradation process caused by coated Z-scheme Pd-BaZrO₃@WO₃ composite was also proposed. The hydroxyl radicals (•OH) and holes are identified to further elaborate the possible mechanism. The coated Z-scheme Pd-BaZrO₃@WO₃ composite displays a good sonocatalytic activity because it can efficiently restrain recombination of photo-generated electrons and holes, increase utilization rate of light and provide almost 100% oxidization surface.

Read the article here:   27-Construction of coated Z-scheme Pd-BaZrO3@WO3 composite with enhanced sonocatalytic activity for diazinon degradation in aqueous solution.pdf