A kind of preparation method of metal oxide nanoparticle and metal nanoparticle
A metal nanoparticle and nanoparticle technology, which is applied in the preparation of oxides/hydroxides, ferrous oxides, nanotechnology, etc., to solve the problems of agglomeration and sintering, the preparation method is simple, and the crystallinity is good.
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Embodiment 1
[0036] Example 1: Prepare a solution with a concentration of 0.1 mol / L with iron acetylacetonate and ethanol, impregnate potassium sulfate powder, remove excess impregnating liquid, and dry the powder. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α ferric oxide nanoparticles Particles; if reduced between 400°C and 500°C, ferric oxide nanoparticles can be obtained after washing and drying.
Embodiment 2
[0037] Example 2: Prepare a solution with a concentration of 0.1 mol / L with iron acetylacetonate and chloroform, impregnate potassium sulfate powder, remove excess impregnating liquid, and dry the powder. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α ferric oxide nanoparticles Particles; if reduced between 400°C and 500°C, ferric oxide nanoparticles can be obtained after washing and drying.
Embodiment 3
[0038] Example 3: A solution with a concentration of 0.1 mol / L was prepared with iron acetylacetonate and acetone, impregnated with potassium sulfate powder, and after removing excess impregnating liquid, the powder was dried. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α ferric oxide nanoparticles Particles; if reduced between 400°C and 500°C, ferric oxide nanoparticles can be obtained after washing and drying.
[0039]Example 3: Prepare a solution with a concentration of 0.01 mol / L with iron acetylacetonate and chloroform, impregnate potassium sulfate powder, remove excess impregnating liquid, and dry the powder. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α fe...
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