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Preparation method of heavy metal adsorbent alpha-Al2O3 nanoparticles

A nanoparticle and adsorbent technology, which is applied in the field of nanoscale sewage treatment agent preparation, can solve the problems of alumina agglomeration, difficult control of particle size and shape, and difficult preparation and operation, and achieve low cost, high reaction selectivity, and high purity. high effect

Inactive Publication Date: 2018-05-04
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for α-Al 2 o 3 The preparation of nanoparticles is difficult, the obtained alumina has agglomeration phenomenon, and the particle size and shape are difficult to control

Method used

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  • Preparation method of heavy metal adsorbent alpha-Al2O3 nanoparticles
  • Preparation method of heavy metal adsorbent alpha-Al2O3 nanoparticles
  • Preparation method of heavy metal adsorbent alpha-Al2O3 nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A. Dissolve 2g of aluminum powder into anhydrous ethylene glycol, control the molar ratio of aluminum powder and ethylene glycol to 1:25, stir on a temperature-controlled magnetic stirrer, add PEG6000, and control the mass ratio of PEG6000 to aluminum powder to be 0.035:1, temperature controlled stirring, adding AlCl 3 Catalyzed reaction, reacted at 65°C for 6 hours, and obtained white precipitate of aluminum ethylene glycol;

[0022] B. Add 25g of deionized water into the reaction vessel, temperature-controlled magnetic stirring, and hydrolyze at 60°C for 5 hours to form hydrated alumina gel;

[0023] C. Drying at 80°C for 24 hours, drying the hydrated alumina gel to form a xerogel;

[0024] D. Calcining the dry gel at 10°C / min at a heating rate of 1100°C for 3 hours to prepare α-Al 2 o 3 Nanoparticles. The resulting α-Al 2 o 3 Nanoparticles are granular, with good dispersion and uniform particle size distribution.

Embodiment 2

[0026] A. Dissolve 2g of aluminum powder into anhydrous ethylene glycol, control the molar ratio of aluminum powder and ethylene glycol to 1:28, stir on a temperature-controlled magnetic stirrer, add PEG6000, and control the mass ratio of PEG6000 to aluminum powder to be 0.030:1, temperature controlled stirring, adding AlCl 3 Catalyzed reaction, reacted at 50°C for 8 hours, and obtained a white precipitate of aluminum ethylene glycol;

[0027] B. Add 25g of deionized water into the reaction vessel, temperature-controlled magnetic stirring, and hydrolyze at 65°C for 3 hours to form hydrated alumina gel;

[0028] C. Drying at 80°C for 24 hours, drying the hydrated alumina gel to form a xerogel;

[0029] D. Calcining xerogel at 8°C / min heating rate to 1150°C for 2.5h to prepare α-Al 2 o 3 Nanoparticles. The resulting α-Al 2 o 3 Nanoparticles are granular, with good dispersion and uniform particle size distribution.

Embodiment 3

[0031] A. Dissolve 2g of aluminum powder into anhydrous ethylene glycol, control the molar ratio of aluminum powder and ethylene glycol to 1:30, stir on a temperature-controlled magnetic stirrer, add PEG6000, and control the mass ratio of PEG6000 to aluminum powder to be 0.025:1, temperature controlled stirring, adding AlCl 3 Catalyzed reaction, reacted at 70°C for 5 hours, and obtained a white precipitate of aluminum ethylene glycol;

[0032] B. Add 25g of deionized water into the reaction vessel, temperature-controlled magnetic stirring, and hydrolyze at 70°C for 2 hours to form hydrated alumina gel;

[0033] C. Dry at 60°C for 48 hours, and dry the hydrated alumina gel to form a xerogel;

[0034] D. Calcining the xerogel at a heating rate of 5°C / min to 1200°C for 3 hours to prepare α-Al 2 o 3 Nanoparticles. The resulting α-Al 2 o 3 Nanoparticles are granular, with good dispersion and uniform particle size distribution.

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Abstract

The invention relates to a preparation method of heavy metal adsorbent alpha-Al2O3 nanoparticles and belongs to the technical field of preparation of a nanometer sewage treating agent. A glycol aluminum precursor is prepared by an alcohol aluminum hydrolysis method and high-temperature calcination is conducted to obtain the alpha-Al2O3 nanoparticles. The preparation method comprises the followingsteps: A, dissolving aluminum powder into anhydrous glycol, controlling the molar ratio of the aluminum powder to the anhydrous glycol to be 1:(25-30), stirring, adding PEG6000, adding AlCl3, performing catalytic reaction, and stirring for 5 to 8 hours by controlling the temperature to be 50 to 70 DEG C to obtain glycol aluminum white precipitate; B, adding deionized water into the glycol aluminumwhite precipitate obtained in the step A, stirring by controlling the temperature and performing hydrolysis at 60 to 70 DEG C for 2 to 5 hours to obtain hydrated alumina gel; C, drying the hydrated alumina gel at 60 to 80 DEG C for 24 to 48 hours to obtain dry gel; and D, heating to 1100 to 1200 DEG C at the heating speed of 5 to 10 DEG C / min and calcining the dry gel for 2 to 3 hours to preparethe alpha-Al2O3 nanoparticles. The method is mild and stable in preparation process; and the prepared nanometer aluminum oxide has high purity and has high adsorptive property on various heavy metal ions.

Description

technical field [0001] The invention belongs to the technical field of nanoscale sewage treatment agent preparation, and relates to an α-Al 2 o 3 Nanoparticles, specifically related to a heavy metal adsorbent α-Al 2 o 3 Methods for the preparation of nanoparticles. The preparation process of the method of the invention is mild and stable, the prepared nano-alumina has high purity, and has good adsorption performance for various heavy metal ions. Background technique [0002] Water is the source of life, and the pollution of water resources has brought more health problems to human beings. The groundwater in many cities has problems such as eutrophication and excessive heavy metal ions. Among them, heavy metal water pollution has seriously affected the ecological environment and human life and health. For example, the main toxic effects of lead ions are anemia, nervous dysfunction and kidney damage; chromium ions can cause abdominal discomfort and diarrhea and other poiso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F101/20C02F101/22
CPCB01J20/08B01J20/28016C02F1/281C02F2101/20C02F2101/22
Inventor 张建平张川张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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