Detection of reactive oxygen species (ROS) generated by TiO2(R), TiO2(R/A) and TiO2(A) under ultrasonic and solar light irradiation and application in degradation of organic dyes

► ROS were detected by the method of Oxidation-Extraction Photometry (OEP). ► The formations of ROS were studied during sonocatalytic or photocatalytic process. ► The kinds of ROS were determined by adding some scavengers. ► The degradation of dyes were studied under ultrasonic and solar light irradiation.