Synthesis and sonocatalytic property of rod-shape Sr(OH)2·8H2O.

Abstract A novel rod-shape sonocatalyst Sr(OH) 2 ·8H 2 O was prepared by a facile precipitation method, and characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and UV–vis absorption spectroscopy. Comparative sonocatalytic degradation experiments were carried out in different conditions under ultrasonic irradiation by using rhodamine B (RhB) as the model substrate, indicating that Sr(OH) 2 ·8H 2 O was highly sonocatalytic. Total organic carbon experiment demonstrated Sr(OH) 2 ·8H 2 O with mass mineralization of organic carbon. The effects of catalyst amount, initial RhB concentration and ultrasonic energy of degradation were investigated, and the sonocatalyst could be reused 5 times without significant loss of activity. Furthermore, the potent degrading capability was ascribed to ultrasonic cavitation producing flash light/energy which generated radicals (e.g., OH) with high oxidation activity.