▎ 摘　　要

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