The invention provides a method for preparing monodisperse
cadmium sulfide nanospheres, comprising steps of adding
cadmium acetate dihydrate and sulfourea into deionized water respectively to obtain a solution A and a solution B, and adding the solution B into the solution A to obtain a solution C; uniformly mixing a PVP (
Polyvinyl Pyrrolidone) solution D and the solution C to obtain a solution E; transferring the solution E into a hydrothermal reactor with Teflon as a lining, sealing the hydrothermal reactor, then putting the hydrothermal reactor into a temperature-pressure dual-control
microwave hydrothermal reaction instrument for implementation of a preparation reaction in a
temperature control mode, and naturally cooling after reaction completion; opening the hydrothermal reactor under the
room temperature, washing with
ethanol, then washing with the deionized water, performing centrifugal collection by taking absolute ethyl
alcohol as a
solvent, and
drying at the temperature of 60 DEG C to obtain products CdS nanospheres. With the adoption of the method for preparing the monodisperse
cadmium sulfide nanospheres, the high-temperature high-pressure environment of a hydrothermal method and the fast heating characteristic of a
microwave method are combined; and with the adoption of a preparation technology of a
microwave hydrothermal method, the monodisperse
cadmium sulfide nanospheres with a regular spherical shape are prepared; and in addition, the method is short in preparation period, low in required temperature, small in
pollution, low in
energy consumption, simple to operate and high in
repeatability, thereby being applicable for
mass production.