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Cobaltosic oxide preparation method

A technology of tricobalt tetroxide and cobalt powder, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., which can solve the problems of difficult control of product morphology, complex preparation process, and wide pore size distribution, and achieve easy control, simple preparation process, and uniform particle size and shape effects

Inactive Publication Date: 2012-05-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a mesoporous cobalt tetroxide nanostructure with controllable morphology, so as to solve the problems of complex preparation process, high cost, difficult to control product morphology, and wide pore size distribution; the prepared cobalt trioxide nanostructure is also Has a large specific surface area

Method used

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  • Cobaltosic oxide preparation method

Examples

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Embodiment 1

[0021] Weigh 1 mmol of cobalt chloride and 1 mmol of oxalic acid and dissolve in 10 ml of nitrogen, nitrogen dimethylacetamide (DMA) to obtain a blue transparent solution. 8 milliliters of deionized water was added thereto, and stirred to obtain a hydrated cobalt oxalate precipitate. The precipitate was washed with deionized water and dried in air to obtain a hydrated cobalt oxalate nanorod structure with good crystal shape.

[0022] The dry powder obtained in the above steps is placed in a muffle furnace for heat treatment at 350° C. for 0.5-3 hours, and then cooled to room temperature to obtain a mesoporous cobalt trioxide nanorod structure.

[0023] Utilize the X'Pert PRO type X-ray powder diffractometer (Cu Kα radiation of PANalytical Company, λ=1.54056 ), to characterize the phase structure of the product, and its test structure is as figure 1 As shown, the product is a pure phase spinel structure of cobalt tetraoxide with good crystallinity. Nitrogen adsorption-desor...

Embodiment 2

[0025] Weigh 1 mmol of cobalt chloride and 1 mmol of oxalic acid and dissolve in 10 ml of nitrogen, nitrogen dimethylacetamide (DMA) to obtain a blue transparent solution. Then it was added to 8 ml of deionized water and stirred to obtain a precipitate of hydrated cobalt oxalate. The precipitate was washed with deionized water and dried in air to obtain a hydrated cobalt oxalate nanowire structure with good crystal shape.

[0026] The dry powder obtained in the above steps is placed in a muffle furnace for heat treatment at 350° C. for 0.5-3 hours, and then cooled to room temperature to obtain a mesoporous cobalt trioxide nanowire structure.

Embodiment 3

[0028] Weigh 1 mmol of cobalt chloride and 1 mmol of oxalic acid and dissolve in 10 ml of dimethyl sulfoxide (DMSO) to obtain a blue transparent solution. Then add 8 milliliters of deionized water therein, stir to obtain hydrated cobalt oxalate precipitate. The precipitate was washed with deionized water and dried in air to obtain a layered wrinkled structure of hydrated cobalt oxalate with good crystal shape.

[0029] The dry powder obtained in the above steps is placed in a muffle furnace for heat treatment at 350° C. for 0.5-3 hours, and then cooled to room temperature to obtain a mesoporous cobalt trioxide nano-layered wrinkled structure.

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Abstract

The invention discloses a cobaltosic oxide preparation method. Hydrate cobalt oxalate with an excellent crystal form is prepared at first and used as precursor, and small H2O and CO2 gas molecules are released by controlling a roasting process, so that a cobaltosic oxide nano structure with narrow pore size distribution, high specific surface area and controllable texture is obtained.

Description

technical field [0001] The invention relates to a preparation method of tricobalt tetroxide, in particular to a method for preparing a shape-controllable mesoporous cobalt trioxide nanostructure by using hydrated cobalt oxalate as a precursor. Background technique [0002] Cobalt tetroxide (Co 3 o 4 ) is a p-type semiconductor that has been widely used in high-tech fields such as heterogeneous catalysis, gas sensors, solar light absorbing materials, lithium-ion batteries, and supercapacitors. Nano-cobalt trioxide has a large specific surface area, so it can provide more reactive sites and present novel characteristics that cannot be compared with bulk materials. Recent studies have shown that the shape-controllable cobalt tetroxide nanostructures have better properties than conventional cobalt tetroxide nanoparticles, so the preparation of shape-controllable cobalt tetroxide nanostructures has become a research hotspot at home and abroad. co 3 o 4 Nanorods can still hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
Inventor 王齐华汪德伟王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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