A kind of spherical co(ii)co(iii) hydrotalcite 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 undiscovered problems and achieve the effects of improving surface compactness, high regularity, and good product sphericity

Active Publication Date: 2021-02-19
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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  • A kind of spherical co(ii)co(iii) hydrotalcite material and preparation method thereof
  • A kind of spherical co(ii)co(iii) hydrotalcite material and preparation method thereof
  • A kind of spherical co(ii)co(iii) hydrotalcite material and preparation method thereof

Examples

Experimental program
Comparison scheme
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

A spherical Co(II)Co(III) hydrotalcite material and a preparation method thereof, characterized in that: the hydrotalcite material is a layered double hydroxyl group formed by divalent cobalt hydroxide and trivalent cobalt hydroxide Metal hydroxide, interlayer guest anions are organic acid radicals, particle morphology is spherical. The mixed solution of cobalt salt and ammonium salt is used as raw material A, the mixed solution of sodium organic acid and oxidizing agent is used as additive B, and the solution of raw material A and additive B is added to the sodium hydroxide bottom liquid by co-precipitation method; Inject nitrogen, stir vigorously, and control the temperature of the reaction kettle at 35°C~65°C; centrifuge or filter the slurry to obtain a filter cake, rinse with water until the filter cake is neutral, and dry in vacuum to obtain spherical Co(Ⅱ)Co(Ⅲ) Hydrotalcite-like materials. The invention realizes the effective control of the metal cobalt valence state in the co-precipitation system, and the hydrotalcite-like crystal thus prepared has a single crystal form, high regularity, good sphericity of the product, and relatively compact surface of the sphere.

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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Patent Type & Authority Patents(China)
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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