Equipment and method for detecting sizes of nano bubbles on surfaces of micro-nano particles in water

The invention discloses equipment and a method for detecting the size of nano bubbles on the surfaces of micro-nano particles in water. The detection equipment comprises an ultrasonic power supply, a high-focus ultrasonic transducer, a light source, a high-speed camera, a liquid tank and a test tank. The detection method comprises the following steps: adding a to-be-detected particle suspension into a test tank, and sealing; placing the test tank in a liquid tank, and enabling the central area of the test tank to coincide with the focus area of the high-focus ultrasonic transducer; turning on an ultrasonic power supply, observing the phenomenon in the test tank through a high-speed camera, and recording the transient cavitation process in the test tank; the maximum radius of the cavitation bubbles in the forming process is measured, and the sizes of the nano bubbles on the surfaces of the micro-nano particles are calculated. The detection equipment disclosed by the invention not only can realize detection of