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Aluminum oxide hollow microsphere and preparation method thereof

A technology of alumina hollow and microspheres, which is applied in the preparation of alumina/hydroxide, etc., which can solve problems such as negative environmental impact, a large amount of surfactants, complex and expensive equipment, etc.

Active Publication Date: 2014-04-16
七台河鑫科纳米新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the materials prepared by these methods can obtain ideal shapes, they all have some defects more or less, or require harsh synthesis conditions, complex and expensive equipment, or require a large amount of surfactants or other special materials. stencils, which can negatively impact the environment

Method used

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  • Aluminum oxide hollow microsphere and preparation method thereof
  • Aluminum oxide hollow microsphere and preparation method thereof
  • Aluminum oxide hollow microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Aluminum tert-butoxide is used as the aluminum source, ethanol is used as the solvent, and oxalic acid is used as the hydrolyzing agent. Aluminum tert-butoxide is added to ethanol, and it is magnetically dissolved at room temperature until it is completely dissolved, and then it is prepared into an ethanol solution of aluminum isopropoxide. Add oxalic acid according to the ratio of aluminum isopropoxide to oxalic acid molar ratio of 1:3, and continue stirring to form a clear solution. The obtained solution was transferred to a polytetrafluoroethylene-lined reactor and reacted at 200°C for 12h. Suction filtration, repeated washing with absolute ethanol, and drying to obtain the precursor. The precursor was calcined in a muffle furnace at 500°C for 4 hours to obtain alumina hollow microspheres.

Embodiment 2

[0018] The solvent was replaced with isopropanol, and other conditions were as in Example 1.

Embodiment 3

[0020] Change the molar ratio of aluminum alkoxide and hydrolyzing agent oxalic acid to 1:5 or 1:7, and other conditions are as in Example 1.

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Abstract

The invention provides an aluminum oxide hollow microsphere and a preparation method thereof. The preparation method comprises the steps of adding aluminum alkoxide to an organic solvent to prepare an aluminum alkoxide solution, adding oxalic acid to the aluminum alkoxide solution at a molar ratio of 1:(1-10), stirring, conducting reaction at 100-220 DEG C for 2-48h, conducting pressure reducing suction filtration and alcohol washing, roasting a dried precursor at 400-900 DEG C, and obtaining the aluminum oxide hollow microsphere with a diameter of 1-2 micrometers and a maximum specific surface area of 326m<2> / g. The method is simple in technological flow, economical and environment-friendly.

Description

technical field [0001] The invention relates to an inorganic functional material and a preparation method thereof, in particular to an alumina hollow microsphere and a preparation method thereof. Background technique [0002] The shape, size, and spatial arrangement of materials have a great influence on their performance, so the design and assembly of materials has attracted the interest of many researchers. Alumina is a very important inorganic functional material, which can be used in many fields such as catalysis, adsorption, separation, and ceramics. At present, people have synthesized nano-alumina with various morphologies by using different methods. Zhu et al. synthesized alumina nanofibers using polyethylene oxide as a surfactant by template method [Zhu,H.Y.; Riches.J.D.;Barry.J.C.Chem.Mater.2002,14,2086.]; Zhang et al. One-dimensional alumina nanostructures were grown on the surface of porous anodized alumina film by anodic oxidation [Zhang, L.; Cheng, B.; Shi, W....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/30
Inventor 刘琦于静王君李占双张密林魏浩刘连河
Owner 七台河鑫科纳米新材料科技发展有限公司