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Method for preparing porous gamma-Al2O3 nano material by taking eutectic solvent as solvent and template agent

A technology of deep eutectic solvents and nanomaterials, applied in the direction of nanotechnology, alumina/aluminum hydroxide, etc., can solve the problems of difficult control of product size and shape, difficulty in industrialization, serious environmental pollution, etc., and achieve good crystal form, Inexpensive, high adsorption efficiency

Inactive Publication Date: 2020-05-29
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the existing technologies for preparing alumina mainly have the following defects: serious environmental pollution, not green and environmentally friendly, difficult to control the size and shape of the product, high cost, complicated preparation process, and difficult to realize industrialization

Method used

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  • Method for preparing porous gamma-Al2O3 nano material by taking eutectic solvent as solvent and template agent
  • Method for preparing porous gamma-Al2O3 nano material by taking eutectic solvent as solvent and template agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step preparation of deep eutectic solvent

[0032] Mix and stir 139.62g choline chloride and 184.18g glycerol in a water bath at 80°C for half an hour to form a deep eutectic solvent.

[0033] The second step is to mix the reactants

[0034] 2.62g of AlCl 3 ·6H 2 O was added in 35g of deep eutectic solvent, stirred for 1 hour under 80°C water bath condition, then added 50ml of ammonium carbonate solution with a concentration of 0.645mol / L under 45°C water bath condition and stirred for 1 hour to prepare the reaction mixture, namely by low Eutectic solvent: AlCl 3 ·6H 2 Molar ratio of O: ammonium carbonate solution = 30:1:3 ratio.

[0035] The third step crystallization

[0036] The reaction mixture prepared in the second step was crystallized at 150°C for 30 hours.

[0037] Step 4 Wash and dry

[0038] The reaction mixture after crystallization in the third step was centrifuged and washed several times with deionized water and ethanol until the pH valu...

Embodiment 2

[0043] Operation process is except following difference, all the other are with embodiment 1:

[0044] The second step is to mix the reactants

[0045] 2.62g of AlCl 3 ·6H 2 O was added in 35g deep eutectic solvent, stirred under 80 DEG C of water bath conditions for 1 hour, then added 35 ml of ammonium carbonate solution with a concentration of 0.92mol / L under 45 DEG C of water bath conditions and stirred for 1 hour to prepare the reaction mixture, namely by low Eutectic solvent: AlCl 3 ·6H 2 Molar ratio of O: ammonium carbonate solution = 30:1:3 ratio.

[0046] The third step crystallization

[0047] The reaction mixture prepared in the second step was crystallized at 180° C. for 30 hours.

[0048] The test and characterization of the prepared sample are the same as in Example 1, and it can be seen from the XRD analysis that the obtained product is γ-Al with good crystal form 2 o 3 . According to the test results of the field emission scanning electron microscope (S...

Embodiment 3

[0050] Operation process is except following difference, all the other are with embodiment 1;

[0051] The first step preparation of deep eutectic solvent

[0052] Mix and stir 139.62g choline chloride and 120.12g urea in a water bath at 80°C for half an hour to form a deep eutectic solvent.

[0053] The second step is to mix the reactants

[0054] Add 35ml of deionized water to 35g of deep eutectic solvent, stir for 30 minutes under 80°C water bath, then add 2.62g of AlCl 3 ·6H 2 O was added into the mixed solution, and the stirring was continued for 1 hour under the condition of 80°C water bath. Finally, add 35 ml of ammonium carbonate solution with a concentration of 0.92 mol / L and stir for 1 hour under the condition of a water bath at 45°C to obtain a reaction mixture, that is, according to the deep eutectic solvent: AlCl 3 ·6H 2 Molar ratio of O: ammonium carbonate solution = 30:1:3 ratio.

[0055] The test and characterization of the prepared sample are the same as...

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Abstract

The invention provides a method for preparing a porous gamma-Al2O3 nano material by taking a eutectic solvent as a solvent and a template agent. A eutectic solvent prepared from choline chloride and glycerol, choline chloride and urea, or choline chloride and triethanolamine is used as a solvent and a template agent, AlCl3.6H2O, AlCl3.9H2O and Al(NO3)3.9H2O are used as aluminum sources, an ammonium carbonate solution is used as alkali liquor, and the porous gamma-Al2O3 nano material is prepared through the steps of preparation of an eutectic solvent, mixing of reactants, crystallization, washing, drying and calcination. The alumina nano-material prepared by the method has the advantages of consistent shape and uniform size, the method is simple to operate, safe and non-toxic and conforms to green chemistry, and the prepared porous gamma-Al2O3 nano-material has potential application in the aspects of adsorption, catalysis and the like.

Description

technical field [0001] The invention relates to a method for preparing porous γ-Al by using a deep eutectic solvent as a solvent and a template agent 2 o 3 The nanometer material method belongs to the technical field of inorganic chemical synthesis preparation. Background technique [0002] In recent years, alumina has received great attention due to its wide application in chemical industry. It is often used as adsorbent, catalyst, ceramics, medical materials and optical materials. There are many crystal forms of alumina, among which the γ and α crystal forms are the most concerned crystal forms, and the γ-Al 2 o 3 It is a low-temperature metastable compound, which contains a variety of surface hydroxyl groups, and has the characteristics of good pore size and large specific surface area. [0003] γ-Al 2 o 3 There are many preparation methods, which are mainly divided into gas phase, solid phase and liquid phase preparation methods. The gas phase method is to use gas...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y40/00
CPCC01F7/02B82Y40/00C01P2004/16C01P2004/62C01P2004/64C01P2006/12C01P2006/16
Inventor 魏立纲李文波邵国林安庆大康致强郝一博杨丽玉高兴
Owner DALIAN POLYTECHNIC UNIVERSITY
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