The effect of ultrasound irradiation on polycrystalline MoO3

The effect of ultrasound irradiation on polycrystalline molybdenum trioxide suspended in n-decane has been investigated. The changes in the physicoche mical properties of MoO3 have been investigated using techniques such as po wder X-ray diffraction, UV-VIS and IR spectroscopies, BET surface area meas urements, scanning electron microscopy, and EPR. Evidence for the formation of Mo(v) sites and shear defects has been presented. The physicochemical c hanges of MoO3 due to ultrasound irradiation have been attributed to the fo rmation of radicals and also the mechanical effects that can be created by ultrasound, such as shear forces, micro jets, and shock-waves. The mechanic al effects are the results of the sonochemical cavity collapse onto molybde num trioxide particles.