Abstract:

Roller vibration milling was used to manufacture zinc quantum dots of 3—5 nm in dry mode and at room temperature，and the product was hydrolyzed with steam at different temperatures to obtain ZnO or hybrid of ZnO and Zn nano-structures.The nano-structures synthesized at 250℃ had the highest dispersivity featuring nano-flakes with nano-rods，that grew along the ［0，1，-1，1］ direction.Among samples produced at different temperatures，the nano-structures had the best photocatalytic performance to degrade methyl orange in water.Exposing the solution of methyl orange with the catalyst to a UV source light of 30 W with a distance of 30 cm for 30 min，a decomposition degree 95% was obtained，and after 1 h the dye was almost totally decomposed.When it was placed in the sun for 15 min and 30 min，the degradation reached 95% and about 100% respectively.The findings provide a new way to enhance the decomposition of dye wastewater by nano-structures.