Method for preparing metal silver nanostructure in water solution

The invention discloses a method for preparing a metal silver nanostructure in water solution, which includes the steps: determining types and proportions of initial reactants according to requirements of different morphologies and evenly mixing the initial reactants to obtain precursor water solution; growing silver nanostructures in the precursor water solution at the constant temperature of 50-105 DEG C; and centrifugally separating and washing reaction solution to obtain silver nanostructures of different morphologies. Inert gas for protection is omitted, reaction temperature is low, the preparation process is simple, the cost is low, and the method overcomes the shortcomings of complicated preparation procedures, low yield, high cost and the like of a traditional polyhydroxy reduction method, a traditional illumination method and a traditional oxidation reduction method, and has important significance for industrial mass production and practical application of the silver nanostructures of different morphologies.