▎ 摘　　要

NOVELTY - The method involves (S1) mixing ammonium tetramolybdate and graphene oxide solution in a mass ratio of (60-600):1 to prepare mixed raw material liquid, (S2) placing mixed raw material liquid under vacuum for 2-12 hours, taking out, freezing with liquid nitrogen and transferring to refrigerator at a temperature of -2-20 degrees C for 2-24 hours to prepare solid mixture, (S3) putting the solid mixture into freeze dryer, controlling the temperature at less than or equal to -60 degrees C and freeze-drying for 2-12 hours under the condition of vacuum degree of less than or equal to 10 Pa to prepare dry mixture, (S4) putting the dry mixture into muffle furnace, controlling the temperature in the furnace at 350-850 degrees C, heat-preserving and calcining for 1-2 hours to obtain sheet-like agglomerated small spherical nano molybdenum trioxide powder. USE - Preparation of nano molybdenum trioxide powder for photocatalytic degradation. ADVANTAGE - The method enables simple, convenient and controllable preparation of nano molybdenum trioxide powder with unique shape, uniform particle size, stability and excellent photocatalytic properties.