Study on the piezoelectric catalytic degradation dyes performance of three-dimensional bismuth tungstate microflower

In this paper, a 3D Bi2WO6 microflower was synthesized by precipitation method. The material belongs to the mm2 point group and is a piezoelectric material with an asymmetric structure. The material structure and morphology of the catalyst were characterized in detail by XRD, SEM, UV-vis and XPS, and the performance of the material to degrade Rhodamine B aqueous solution under different conditions was studied. The results showed that the material has excellent the performance of piezoelectric catalytic degradation. Bi2WO6 microflower's multiple petal surfaces provide multiple positive and negative plates to enhance its piezoelectric effect. The polarized charge generated by mechanical vibration on the surface of Bi2WO6 microflower forms a large number of hydroxyl and superoxide radicals in the aqueous solution, which are the main active species that reflect their degradation activity.