Method for regulating and controlling activity of catalyst by utilizing continuous flow photocatalytic reaction device and application of method

The invention belongs to the technical field of photocatalytic oxidation, and discloses a method for regulating and controlling the activity of a catalyst by utilizing a continuous flow photocatalytic reaction device and application of the method. The method comprises the following steps: putting a diluent of a target pollutant into a liquid storage tank, and tightly connecting the liquid storage tank with a photocatalytic reactor through a silicone tube; according to the method, a single-channel peristaltic pump is used for controlling the water inlet flow rate to be 5-30 mL/min and the water outlet flow rate to be 1-15 mL/min respectively, it is guaranteed that the average water flow speed is 3-20 mL/min, the device operates in a continuous flow state, and a catalyst is continuously excited by ultraviolet light till target pollutants are completely oxidized. According to the method, the contact time of a target object and a catalyst is changed by adjusting the flow speed of a to-be-treated fluid at a water inlet and a water outlet under the condition that the target object is efficiently treated, so that the activity and the service life of the catalyst are regulated. The method can be used for research of related mechanisms such as catalyst deactivation and the like, and the fields of medical wastewater treatment, sewage treatment secondary effluent or deep purification of urban drinking water and the like.