Preparation Method of Hollow Porous Tungsten Oxide Sphere

The invention provides a preparation method of hollow porous tungsten oxide spheres and belongs to the field of functional materials.

The method comprises the following steps of:

(1) Dissolving ammonium tungstate and/or ammonium metatungstate in water and stirring thoroughly to produce a solution with concentration of 1 g/L to 200 g/L;

(2) Preparing hollow powder of ammonium tungstate, ammonium metatungstate or a mixture thereof by the spray drying of spray-drying equipment;

(3) Putting the powder in an electric furnace, heating up to a temperature of 400 DEG C to 1000 DEG C, and preserving heat for 15 minutes to 180 minutes to obtain hollow porous tungsten oxide spheres.

The method needs simple equipment, shortens the process flow, increases the preparation efficiency and is simple and feasible for preparing porous tungsten oxide nano-spheres. The specific surface area of the hollow porous tungsten oxide spheres prepared by the method reaches 15 m<2>/g to 30 m<2>/g. The preparation method has good prospects for industrial applications.


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