Sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere and preparing method thereof

A technology with nanometer and hierarchical structure of cobalt tetroxide, applied in the directions of cobalt oxide/cobalt hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of complicated process, increased cost, impurity of the final product, etc., and achieves simple process, saving production cost, The effect of high product purity

Active Publication Date: 2013-01-23
中科(马鞍山)新材料科创园有限公司
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Problems solved by technology

[0007] One of the objectives of the present invention is to provide a template-free solvothermal method for preparing sea urchin-like hierarchical cobalt tetroxide nanospheres in view of the difficulties in synthesizing hierarchical cobalt tetroxide and complicated processes. This method not only has low-dimensional nano The characteristics of t

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  • Sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere and preparing method thereof
  • Sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere and preparing method thereof

Examples

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Example Embodiment

[0040] Example 1

[0041] (1) Synthesis process: Add 2.5mmol of cobalt chloride to the mixed solution of 20ml distilled water and 20ml glycerol at room temperature and fully dissolve; add 5mmol of urea to the above solution as a precipitant and fully dissolve; put the mixed solution Put it into an autoclave, and react for 20 hours at a temperature of 180°C.

[0042] (2) Centrifugal washing process: centrifuge the synthesized precipitate at a speed of 3000r / min; wash 5 times with distilled water and 5 times with absolute ethanol; dry in a vacuum oven at 80°C for 20 hours to obtain a sea urchin-like hierarchical structure of cobalt tetroxide Precursor.

[0043] (3) Calcination process: heat the precursor obtained in the centrifugal washing process at 350°C in a muffle furnace for 3.5 hours, and cool to room temperature. The cobalt content is 74.35~74.45%.

Example Embodiment

[0044] Example 2

[0045] (1) Synthesis process: Add 5mmol of cobalt chloride into the mixed solution of 35ml distilled water and 5ml glycerol at room temperature, fully dissolve; add 6.5mmol of urea as a precipitant to the above solution, fully dissolve; put the mixed solution in into an autoclave, and reacted for 5 hours at a temperature of 110°C.

[0046] (2) Centrifugal washing process: centrifuge the synthesized precipitate at 6000r / min; wash with distilled water for 3 times and absolute ethanol for 5 times; dry in a vacuum oven at 80°C for 12 hours to obtain a sea urchin-like hierarchical structure of cobalt tetroxide Precursor.

[0047] (3) Calcination process: heat the precursor obtained in the centrifugal washing process at 300°C in a muffle furnace for 2 hours and cool to room temperature. The cobalt content is 74.32~74.42%.

Example Embodiment

[0048] Example 3

[0049] (1) Synthesis process: Add 3.5mmol of cobalt chloride to the mixed solution of 30ml distilled water and 10ml glycerol at room temperature and fully dissolve; add 8mmol of urea to the above solution as a precipitant and fully dissolve; put the mixed solution in Put it into an autoclave, and react for 24 hours at a temperature of 180°C.

[0050] (2) Centrifugal washing process: Centrifuge the synthesized precipitate at a speed of 3000r / min; wash 5 times with distilled water and 5 times with absolute ethanol; dry in a vacuum oven at 70°C for 12 hours to obtain a sea urchin-like hierarchical structure of cobalt tetroxide Precursor.

[0051] (3) Calcination process: heat the precursor obtained in the centrifugal washing process at 400°C in a muffle furnace for 4 hours, and cool to room temperature. The cobalt content is 74.31~74.45%.

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Abstract

The invention provides a sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere and a preparing method thereof. The preparing method comprises the following steps of: mixing cobalt dichloride water solution with glycerol, adding urea into the mixture, reacting, removing impurities, burning, and obtaining the sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere. According to the sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere prepared by the method, the horsehide-shaped hiberarchy has abundant gaps, a large amount of pore ways of which the inner parts are communicated and a larger specific surface area, thus a lot of novel physicochemical characteristics which are generated in a coupling way can be owned, and the sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere can be widely applied to the fields of electrochemistry, catalysis, biosensing, air-sensitive and magnetic materials.

Description

technical field [0001] The invention relates to the field of preparation of inorganic nanometer materials, in particular, the invention relates to a hierarchical structure cobalt trioxide nanosphere and a preparation method thereof. Background technique [0002] With the rapid development of nanoscience, zero-dimensional nanoparticles, one-dimensional nanowires, nanorods, nanotubes, etc. and two-dimensional nanosheets have been successfully synthesized. How to assemble them into complex structures to exhibit novel collective properties has become the focus of domestic and foreign researchers. Hierarchical structure, as a kind of nanostructure, is to assemble structural units of different sizes or levels (nanowires, nanorods, nanoribbons, nanosheets, etc.), so that it has many characteristics of nanoscale material units (such as quantum size effect, small size effect, surface effect, etc.), and has many new physical and chemical properties produced by the coupling of these n...

Claims

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Application Information

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IPC IPC(8): C01G51/04B82Y30/00B82Y40/00
Inventor 谭强强刘少军
Owner 中科(马鞍山)新材料科创园有限公司
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