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Preparation method and application of magnetism-aluminum hydrotalcite with etched potassium hydroxide

A technology of magnesium-aluminum hydrotalcite and potassium hydroxide, applied in the directions of hydrotalcite, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of limited adsorption capacity, small specific surface area, etc., achieve large effective specific surface area, simple preparation process, The effect of big application prospects

Inactive Publication Date: 2019-01-18
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the magnesium aluminum hydrotalcite prepared by these methods, its internal effective specific surface area is small, and its adsorption capacity is limited when it is used as a carbon dioxide adsorbent.

Method used

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  • Preparation method and application of magnetism-aluminum hydrotalcite with etched potassium hydroxide
  • Preparation method and application of magnetism-aluminum hydrotalcite with etched potassium hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] (1) Put 1.366 g of magnesium nitrate and 1.0 g of aluminum nitrate in 70 mL of distilled water and stir until the solids are completely dissolved.

[0018] (2) Add 4.32 g of urea into the solution obtained in step (1), and continue stirring to dissolve all the urea.

[0019] (3) Transfer the solution obtained in step (2) to a 100 mL polytetrafluoroethylene-lined reactor, and place the reactor at 120 o C oven reacted for 12 hours, and cooled to normal temperature after the reaction was completed. The obtained product was filtered under reduced pressure and washed 5 times with distilled water.

[0020] (4) The product obtained in step (3) was transferred to 75 mL of potassium hydroxide solution with a concentration of 0.5 mol / L, and then placed on a magnetic stirrer and stirred for 10 minutes.

[0021] (5) Transfer the solid-liquid mixture obtained in step (4) to a 100 mL polytetrafluoroethylene-lined reactor, and place the reactor at 95 o C reacted for 2 hours, and co...

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PUM

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Abstract

The invention discloses a preparation method and application of magnetism-aluminum hydrotalcite with etched potassium hydroxide. By utilizing an etching method, aluminum substances in the magnetism-aluminum hydrotalcite are removed by utilizing potassium hydroxide so as to form a nano-pore channel, so that the specific area of the inner part of the hydrotalcite is improved. Through a scanning electron microscope, a pore channel is formed on a magnetism-aluminum hydrotalcite nano-sheet with the etched potassium hydroxide, and fractal dimensions of the surface of the sheet and an edge area are increased. The preparation process disclosed by the invention is simple, and the produced magnetism-aluminum hydrotalcite with the etched potassium hydroxide has a larger effective specific surface area, more adsorption active sites can be provided, and the magnetism-aluminum hydrotalcite with the etched potassium hydroxide has greater application prospect on adsorption and capture of carbon dioxide.

Description

technical field [0001] The invention relates to a preparation method of hydrotalcite compounds, in particular to a preparation method and application of potassium hydroxide etched magnesium aluminum hydrotalcite. Background technique [0002] Hydrotalcite is composed of two or more composite metal hydroxide main layers with positive charges and interlayer anions and water molecules for charge balance. Due to the special structure and physical and chemical properties of hydrotalcite, such as the exchangeability of interlayer anions, the controllability of main layer cations, acidity and alkalinity, memory effect, etc., it plays an extraordinary role in many fields. In particular, magnesium aluminum hydrotalcite has good application prospects in the fields of catalyst carriers, adsorption materials, environmental protection materials, functional materials, and drug carriers due to its excellent alkalinity, adsorption, thermal stability, and non-toxic properties. , has receive...

Claims

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Application Information

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IPC IPC(8): C01F7/00B01J20/08
CPCB01J20/08C01F7/785Y02C20/40
Inventor 冯艳艳李彦杰杨地叶广源潘柳东廖燕华
Owner GUILIN UNIVERSITY OF TECHNOLOGY