| abstract |
The invention provides a photocatalytic system containing ɑ-MnO 2 , a preparation method and application thereof, and belongs to the technical field of photocatalysts. The photocatalytic system includes ɑ-MnO 2 and NaHSO 4 , and the mass ratio of NaHSO 4 to ɑ-MnO 2 is 0.05-1:1; ɑ-MnO 2 is prepared by the following method: KMnO 4 is dissolved in deionized water, and Drop into an aqueous solution containing MnSO 4 ·H 2 O under stirring to obtain a mixed slurry, which is transferred to a stainless steel autoclave lined with PTFE, and kept in an oven at 130-145°C for 10-13 hours; the slurry to be mixed After the material is cooled, it is filtered and washed, and the obtained product is dried in an oven, and calcined in a muffle furnace under an air atmosphere of 280-320 ° C for 1.5-2.5 h to obtain ɑ-MnO 2 . The invention has high photocatalytic efficiency, has obvious degradation effect on various organic substances, has high degradation efficiency and simple system operation. |