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A synthesis method of petal-shaped magnesia-aluminum spinel nanohollow spheres with high specific surface area

A technology of magnesium-aluminum spinel and high specific surface, which is applied in the field of nano-powder synthesis, can solve problems such as environmental pollution, complex process, and small specific surface area, and achieve good dispersion, simple process, and high particle purity.

Active Publication Date: 2018-06-19
湖南华佳纳米新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to solve the problems in the prior art such as complex process, environmental pollution, small specific surface area, etc.

Method used

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  • A synthesis method of petal-shaped magnesia-aluminum spinel nanohollow spheres with high specific surface area
  • A synthesis method of petal-shaped magnesia-aluminum spinel nanohollow spheres with high specific surface area
  • A synthesis method of petal-shaped magnesia-aluminum spinel nanohollow spheres with high specific surface area

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Experimental program
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Effect test

Embodiment 1

[0028] 1) Preparation of carbon spheres

[0029] 1.1) Using glucose as raw material, according to the concentration of 2g glucose / 10mL water, dissolve 8g glucose in 40mL deionized water to form a clear solution A;

[0030] 1.2) Transfer the solution A obtained in step 1.1) to a hydrothermal kettle and react at 170°C for 24 hours; naturally cool the hydrothermal kettle to room temperature to obtain a black or dark brown suspension B;

[0031] 1.3) Wash the suspension B obtained in step 1.2) with deionized water and ethanol, centrifuge, and disperse to obtain a black or dark brown precipitate;

[0032] 1.4) The precipitate obtained in step 1.3) was dried at 60° C. for 12 hours to obtain carbon sphere particles.

[0033] 2) Dissolve 0.4g of carbon spheres in 72mL of deionized water, and ultrasonicate for 30 minutes at room temperature to obtain carbon sphere suspension solution C;

[0034] 3) Weighing the metal salt, the mass ratio of the carbon spheres in step 2) to the metal ...

Embodiment 2

[0050] 1) Preparation of carbon spheres

[0051] 1.1) Using glucose as raw material, according to the concentration of 2g glucose / 10ml water, dissolve 8g glucose in 40ml deionized water to form a clear solution A;

[0052] 1.2) Transfer the solution A obtained in step 1.1) to a hydrothermal kettle and react at 170°C for 24 hours; naturally cool the hydrothermal kettle to room temperature to obtain a black or dark brown suspension B;

[0053] 1.3) Wash the suspension B obtained in step 1.2) with deionized water and ethanol, centrifuge, and disperse to obtain a black or dark brown precipitate;

[0054] 1.4) The precipitate obtained in step 1.3) was dried at 60° C. for 12 hours to obtain carbon sphere particles.

[0055] 2) Weigh 0.4g of carbon spheres and dissolve them in a mixed solution of 36ml of deionized water and 36ml of ethylene glycol, and ultrasonicate for 30min at room temperature to obtain carbon sphere suspension solution C;

[0056] 3) Weighing the metal salt, the...

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Abstract

The invention discloses a preparation method of petal-shaped MgAl2O4 hollow nanospheres. Glucose is used as a carbon source, and carbon spheres prepared by hydrothermal method are used as a template. 0.4g of carbon spheres is taken, and magnesium nitrate is weighed according to a molar ratio of 2:1. Dissolve with aluminum nitrate in water, disperse evenly by ultrasonication for 60 minutes at room temperature, transfer to a 100ml hydrothermal kettle, react at 180°C for 24 hours, naturally cool to room temperature, centrifuge and wash to obtain a dark brown precipitate, dry at 60°C for 12 hours, heat up to 1000°C Remove the carbon spheres and keep warm for 5 hours to obtain the hollow magnesia-aluminum spinel nanosphere material with a petal-like structure. The present invention uses carbon spheres as templates to directly hydrothermally synthesize petal-shaped magnesia-aluminum spinel nanospheres with high specific surface area, which has the advantages of simple process, low cost, easy operation, no precipitant, etc., and the obtained product has uniform size and crystal form. Nice and easy to control.

Description

technical field [0001] The invention relates to nano powder synthesis technology, in particular to a synthesis method of petal-shaped magnesia-aluminum spinel nano hollow spheres with high specific surface. Background technique [0002] Magnesium-aluminum spinel is a stable compound with high melting point, high strength, low thermal expansion coefficient, good chemical stability, anti-sintering, etc. It has a unique surface with both acidic and alkaline active centers It is widely used as a catalyst carrier in chemical reactions. However, magnesium aluminum spinel nanoparticles prepared by conventional methods often have the disadvantage of low specific surface area, while magnesium aluminum spinel nano hollow spheres can exhibit many unique properties due to their special hollow structure and morphology, such as high specific surface area. Surface area, low density. It has extensive and special application prospects in the fields of catalysis and medicine, and can be use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02C04B35/443C04B35/626B82Y30/00
Inventor 董立春张莉梅任斌唐成黎赵明辉谭芸妃
Owner 湖南华佳纳米新材料科技有限公司
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