Preparation method of floating photocatalyst as well as obtained product and application thereof

The invention discloses a preparation method of a floating photocatalyst, which comprises the following steps: after a waste mask is disinfected and dried, a nose bridge strip and ear ropes are taken down, and the remaining face body of the waste mask is placed in an ethanol solution to be soaked and irradiated under ultraviolet light; the preparation method comprises the following steps: putting a BiOBr catalyst into a pure water solution, dispersing, dropwise adding a polyethyleneimine water solution, and stirring to obtain a catalyst solution; transferring to a container, covering a waste mask above the container with the inner side facing downwards, covering with a screen cover, rotating and inverting, oscillating and rotating, standing, inverting and oscillating, taking out, soaking with a weakly acidic aqueous solution, and drying. The invention also discloses the floating photocatalyst prepared by the preparation method and application of the floating photocatalyst in degradation of organic pollutants,