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Spherical Co (II) Co (III) hydrotalcite like material and preparation method thereof

A hydrotalcite and spherical technology, which is applied in the field of spherical CoCo hydrotalcite-like materials and its preparation, can solve problems such as undiscovered, and achieve the effect of dense surface, good sphericity of product, and dense surface of sphere

Active Publication Date: 2019-03-22
兰州金通储能动力新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing research reports, there are very few reports on the synthesis of hydrotalcite structural materials from monovalent metal raw materials.
In the prior art, most of the materials synthesized by traditional co-precipitation method have hexagonal flake morphology characteristics. Regarding the research on changing and regulating the surface morphology of hydrotalcite materials from the perspective of synthesis process, no related research has been found. Literature and Patent Reports

Method used

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  • Spherical Co (II) Co (III) hydrotalcite like material and preparation method thereof
  • Spherical Co (II) Co (III) hydrotalcite like material and preparation method thereof
  • Spherical Co (II) Co (III) hydrotalcite like material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Prepare mixed solution A of 1mol / L cobalt nitrate and 0.2mol / L ammonium nitrate, prepare 0.1mol / LH 2 o 2 and 0.1mol / L sodium oxalate mixed solution B. Using the co-precipitation method, the A and B solutions were added to the 100mL sodium hydroxide bottom solution with an initial pH of 10 according to the flow rate of 6mL / min and 5mL / min, and the H was controlled during the process. 2 o 2 The molar ratio with cobalt salt is 1:12. During the reaction process, 2mol / L sodium hydroxide solution is continuously added to maintain the pH value of the reaction solution at about 10; The temperature was controlled at 55°C. After the reaction was completed, it was centrifuged, washed with a large amount of deionized water until the filter cake was neutral, and finally dried in vacuum at 70°C. The obtained sample was named H1, which is a spherical Co(II)Co(III) hydrotalcite material. The spherical Co(II) Co(III) hydrotalcite material is a layered double hydroxyl metal hydroxide...

Embodiment 2

[0033] Prepare mixed solution A of 1mol / L cobalt nitrate and 0.2mol / L ammonium nitrate, prepare 0.1mol / LH 2 o 2 and 0.1mol / L sodium oxalate mixed solution B. Using the co-precipitation method, the A and B solutions were added to the 100mL sodium hydroxide bottom solution with an initial pH of 10 according to the flow rate of 6mL / min and 6.67mL / min, and the H was controlled during the process. 2 o 2 The molar ratio with cobalt salt is 1:9. During the reaction process, 2mol / L sodium hydroxide solution is continuously added to maintain the pH value of the reaction solution at about 10; The temperature was controlled at 55°C. After the reaction, it was centrifuged, washed with a large amount of deionized water until the filter cake was neutral, and finally dried in vacuum at 70°C. The obtained sample was named H2, which is a spherical Co(II)Co(III) hydrotalcite material. The spherical Co(II) Co(III) hydrotalcite material is a layered double hydroxyl metal hydroxide formed by d...

Embodiment 3

[0036] Prepare mixed solution A of 1mol / L cobalt nitrate and 0.2mol / L ammonium nitrate, prepare 0.1mol / LH 2 o 2 and 0.1mol / L sodium oxalate mixed solution B. Using the co-precipitation method, the A and B solutions were added to the 100mL sodium hydroxide bottom solution with an initial pH of 10 according to the flow rate of 6mL / min and 10mL / min, and the H was controlled during the process. 2 o 2 The molar ratio with cobalt salt is 1:6. During the reaction process, 2mol / L sodium hydroxide solution is continuously added to maintain the pH value of the reaction solution at about 10; The temperature was controlled at 55°C. After the reaction, it was centrifuged, washed with a large amount of deionized water until the filter cake was neutral, and finally dried in vacuum at 70°C. The obtained sample was named H3, which is a spherical Co(II)Co(III) hydrotalcite material. The spherical Co(II) Co(III) hydrotalcite material is a layered double hydroxyl metal hydroxide formed by div...

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Abstract

The invention relates to a spherical Co (II) Co (III) hydrotalcite like material and a preparation method thereof, which are characterized in that the hydrotalcite like material is a layered dihydroxyl metal hydroxide formed by a divalent cobalt hydroxide and a trivalent cobalt hydroxide; interlayer object anions are organic acid radicals; particles have a spherical morphology. Mixed solution of cobalt salt and ammonium salt is used as a raw material A, mixed solution of organic acid sodium and an oxidizing agent is used as an additive B, and solution of the raw material A and the additive B is added into sodium hydroxide base solution by adopting a coprecipitation method; nitrogen gas is filled into a reaction kettle, violent stirring is carried out, and the temperature of the reaction kettle is controlled within a range of 35 DEG C to 65 DEG C; a sizing agent is centrifuged or filtered to obtain a filter cake, the filter cake is flushed with water until the filter cake is neutral, and vacuum drying is carried out to obtain the spherical Co (II) Co (III) hydrotalcite like material. According to the invention, effective control on a valence state of metal cobalt in a coprecipitation system is implemented, the hydrotalcite like material prepared hereby is single in crystal form and high in regularity, and the product is excellent in sphericity degree and relatively compact in sphere surface.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a spherical Co(II)Co(III) hydrotalcite material and a preparation method thereof. Background technique [0002] Hydrotalcite-like is an anionic clay with a layered structure, generally composed of hydroxides of divalent and trivalent metal cations, so it is also called layered double hydroxyl compound metal hydroxides (Layered Double Hydroxides, LDHs for short) ). The hydrotalcite-like main layer is arranged in octahedrons, and part of the divalent cations in the octahedron are replaced by trivalent cations, so that the main layer exhibits a positive valence and achieves a valence balance with the interlayer anions. Generally speaking, the preparation of hydrotalcite structure materials requires two or more metal salts with different valence states, and there can be many types of anions between the layers. Common inorganic anions include CO 3 2- , Cl - , SO 4 2- , NO 3 ...

Claims

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Application Information

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IPC IPC(8): C01G51/04
CPCC01G51/04C01P2002/22C01P2002/72C01P2004/32C01P2004/61C01P2006/12
Inventor 朱涛王梁梁朱用赵亮张振兴丁帝李佰康褚风辉
Owner 兰州金通储能动力新材料有限公司
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