Method for preparing porous Co3O4 powder

A technology of powder and cobalt nitrate, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve problems such as shortage, and achieve the effect of simple preparation process

Inactive Publication Date: 2013-08-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a lack of a simple, low-cost preparation of porous Co 3 o 4 powder method

Method used

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  • Method for preparing porous Co3O4 powder
  • Method for preparing porous Co3O4 powder
  • Method for preparing porous Co3O4 powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1.22 g of Co(NO 3 ) 2 ?6H 2 O and 1.75 g of C 2 h 5 NO 2 Completely dissolved in 10 mL of distilled water to obtain a transparent solution, and then the crucible containing the above solution was placed in a muffle furnace and heated at 400 °C. After the solution experienced boiling, bubbling, and decomposition, a black foam-like substance was obtained, and the foam was further heat-treated at 355 °C for 1.0 h to obtain porous Co 3 o 4 Powder.

[0022] figure 1 It is the X-ray diffraction pattern of the product, and it can be known by comparison with the standard card that the phase of the obtained product is a single-phase Co 3 o 4 . Using the Scherrer formula, the average grain size of the product can be obtained to be 13 nm. figure 2 with image 3 The transmission electron micrographs and high-resolution transmission electron micrographs of the obtained product are respectively, and it can be seen that the product has a porous structure. The specific su...

Embodiment 2

[0024] 1.22 g of Co(NO 3 ) 2 ?6H 2 O and 1.75 g of C 2 h 5 NO 2 Completely dissolved in 10 mL of distilled water to obtain a transparent solution, and then the crucible containing the above solution was placed in a muffle furnace and heated at 400 °C. After the solution experienced boiling, bubbling, and decomposition, a black foam-like substance was obtained, and the foam was further heat-treated at 450 °C for 1.0 h to obtain porous Co 3 o 4 Powder.

[0025] Figure 4 It is the X-ray diffraction pattern of the product, and it can be known by comparison with the standard card that the phase of the obtained product is a single-phase Co 3 o 4 . Figure 5 As a transmission electron micrograph of the obtained product, it can be seen that the product has a porous structure.

Embodiment 3

[0027] 1.22 g of Co(NO 3 ) 2 ?6H 2 O and 1.75 g of C 2 h 5 NO 2 Completely dissolved in 10 mL of distilled water to obtain a transparent solution, and then the crucible containing the above solution was placed in a muffle furnace and heated at 400 °C. After the solution experienced boiling, foaming, and decomposition, a black foam-like substance was obtained, and the foam was further heat-treated at 550 °C for 1.5 hours to obtain porous Co 3 o 4 Powder.

[0028] Image 6 It is the X-ray diffraction pattern of the product, and it can be known by comparison with the standard card that the phase of the obtained product is a single-phase Co 3 o 4 . Figure 7 with Figure 8 They are field emission scanning electron micrographs and transmission electron micrographs of the obtained product respectively, and it can be seen that the product has a porous structure.

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Abstract

The invention discloses a method for preparing porous Co3O4 powder. The method comprises the following steps of: completely dissolving and mixing cobalt nitrate and glycine in deionized water, then putting a crucible filled with the mixed solution in a muffle furnace to heat and decompose the mixed solution to obtain black fluffy foams; and carrying out thermal treatment on the black fluffy foams for 1.0-1.5 hours at 355-550 DEG C to obtain the porous Co3O4 powder. The method disclosed by the invention is simple in preparation process, free of any template or surfactant and suitable for large-scale preparation.

Description

technical field [0001] The present invention relates to a porous Co 3 o 4 Powder preparation method. Background technique [0002] co 3 o 4 It is an important multifunctional semiconductor material, which has potential application prospects in the fields of catalysts, lithium-ion batteries, supercapacitors and gas sensors. Porous materials have a large specific surface area and can provide abundant transport channels for gases or liquids. They often show excellent performance when applied in catalysis, energy conversion, energy storage, gas sensing and other fields. [0003] So far, porous Co 3 o 4 Most of the powder preparation methods use the template method, using soft templates (such as surfactants) or hard templates (such as mesoporous silica and polystyrene spheres) as templates. The preparation process is cumbersome, the conditions are harsh, the cycle is long, and the cost is high. . For this reason, researchers at home and abroad have carried out a lot of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
Inventor 文伟吴进明
Owner ZHEJIANG UNIV
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