Morphology-controllable hollow aluminum oxide microspheres as well as preparation method and application thereof

An alumina and hollow technology, applied in the preparation of aluminum hydroxide, chemical instruments and methods, applications, etc., can solve problems such as difficult to achieve repair, and achieve the effects of controllable morphology, large specific surface area, and environmental friendliness

Inactive Publication Date: 2020-08-04
HENAN UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As and its compounds are common environmental pollutants, often in soil or water as AsO 4 3- , A

Method used

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  • Morphology-controllable hollow aluminum oxide microspheres as well as preparation method and application thereof
  • Morphology-controllable hollow aluminum oxide microspheres as well as preparation method and application thereof
  • Morphology-controllable hollow aluminum oxide microspheres as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing hollow alumina microspheres with controllable morphology, the steps are as follows:

[0020] Will Al 2 (SO 4 ) 3 , urea and ethylene glycol were added to distilled water to make Al 2 (SO 4 ) 3 The concentration is 0.15 mol·L -1 , the concentration of urea is 0.80 mol·L -1 , the concentration of ethylene glycol is 0.008 mol·L -1 , take 250 mL of the above solution, magnetically stir at room temperature for 20 min, then transfer to a polytetrafluoroethylene reactor, 180 o C was reacted for 24 h. After taking it out, it was naturally cooled to room temperature. The product was washed three times with absolute ethanol and water respectively, and the precipitate -30 o C freeze-dried for 24 h, and then in a muffle furnace at 500 o C was calcined for 2 h to obtain hollow Al 2 o 3 The microspheres have an average particle size of 4.2 μm and a wall thickness of 0.7 μm.

[0021] Weigh 5.00 g of heavy metal contaminated soil samples (Pb, Cd and A...

Embodiment 2

[0023] A method for preparing hollow alumina microspheres with controllable morphology, the steps are as follows:

[0024] Al(NO 3 ) 3 , urea and polyethylene glycol PEG-400 were added to distilled water to make Al(NO 3 ) 3 The concentration is 0.2 mol·L -1 , urea concentration is 1.0mol L -1 , The concentration of polyethylene glycol PEG-400 is 0.008 mol L -1 , take 250 mL of the above solution, stir it magnetically for 20 min, then transfer it to a polytetrafluoroethylene reactor, 200 o C was reacted for 24 h. After taking it out, it was naturally cooled to room temperature. The product was washed three times with absolute ethanol and water respectively, and the precipitate -40 o C freeze-dried for 24 h, and then in a muffle furnace at 600 o C was calcined for 2 h to obtain hollow Al 2 o 3 Microspheres, the microspheres have an average particle size of 4.4 μm and a wall thickness of 0.8 μm. The specific surface area, pore volume and pore diameter of the prepared ho...

Embodiment 3

[0027] A method for preparing hollow alumina microspheres with controllable morphology, the steps are as follows:

[0028] AlCl 3 , urea, and polyethylene glycol PEG-6000 are added to distilled water to make AlCl 3 The concentration is 0.25 mol·L -1 , the concentration of urea is 1.10 mol L -1 , The concentration of polyethylene glycol PEG-6000 is 0.008 mol L -1 , take 250 mL of the above solution, stir it magnetically for 20 min, then transfer it to a polytetrafluoroethylene reactor, 190 o C for 24 h. After taking it out, it was naturally cooled to room temperature, and the product was washed three times with absolute ethanol and water respectively, and the precipitate -50 o C freeze-dried for 24 h, and then in a muffle furnace at 1100 o C was calcined for 2 h to obtain hollow Al 2 o 3 The microspheres have an average particle size of 4.3 μm and a wall thickness of 0.6 μm.

[0029]Weigh 5.00 g of heavy metal contaminated soil samples (Pb, Cd and As concentrations wer...

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Abstract

The invention discloses morphology-controllable hollow aluminum oxide microspheres as well as a preparation method and application thereof, and belongs to the technical field of inorganic synthetic materials. The preparation comprises the following steps: adding soluble aluminum salt, urea and a dispersing agent into a medium, wherein the used soluble aluminum salt is Al2(SO4)3, Al(NO3)3, AlCl3 and the like; and carrying out hydrothermal treatment to obtain a hydroxyl alumina precursor, and washing, freeze-drying and calcining the precursor to obtain the hollow Al2O3 microspheres. By adoptingthe scheme, the morphology-controllable hollow aluminum oxide microspheres can be obtained, and the obtained product can be applied to the fields of soil remediation, sewage treatment, cosmetics, coatings and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthetic materials, and in particular relates to a shape-controllable hollow alumina microsphere, its preparation method and application. Background technique [0002] As is a non-metal, but has metal properties, is toxic, and is included in the list of carcinogens by the International Agency for Research on Cancer of the World Health Organization. As pollution can cause serious harm to humans through the food chain, such as lung cancer, gangrene, skin cancer, cardiovascular disease, etc. As and its compounds are common environmental pollutants, often in soil or water as AsO 4 3- , AsO 3 3- It is difficult for conventional complexing agents (such as EDTA, IDA, NTA) to repair it. Currently, common As-contaminated soil or water remediation technologies include: in-situ passivation, electrokinetic remediation, microbial remediation, phytoremediation, etc. Among them, the in-situ passivation ...

Claims

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Application Information

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IPC IPC(8): C01F7/34C01F7/44C02F1/62C09K17/04C09K17/08
CPCC01F7/34C01F7/441C01P2004/34C01P2004/61C01P2004/62C02F1/62C09K17/04C09K17/08
Inventor 张治军邹雪艳赵彦保
Owner HENAN UNIVERSITY
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