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Preparation method of layered double hydroxide, layered double hydroxide and application thereof

A technology of hydroxides and double metal oxides, applied in alkali metal oxides/hydroxides, chemical instruments and methods, alkali metal compounds, etc., to achieve the effects of simple synthesis process, low production cost, and huge application potential

Inactive Publication Date: 2020-03-24
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the existing problems, the present invention provides a layered double hydroxide intercalated with an organosulfur functional monomer and its preparation method and application

Method used

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  • Preparation method of layered double hydroxide, layered double hydroxide and application thereof
  • Preparation method of layered double hydroxide, layered double hydroxide and application thereof
  • Preparation method of layered double hydroxide, layered double hydroxide and application thereof

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Embodiment 1

[0036] The invention provides a method for preparing a layered double hydroxide, which uses an organic sulfur functional monomer containing a mercapto group as an interlayer anion, and adopts a pyrolysis-hydration reconstruction method to synthesize a layered double hydroxide intercalated with an organic sulfur functional monomer. double hydroxide.

[0037] The preparation idea of ​​the present invention is: first prepare layered double hydroxide intercalated with carbonate radicals, then pyrolyze to obtain double metal oxides, and then add the double metal oxides to the solution containing organic sulfur functional monomers under nitrogen atmosphere Hydration and reconstruction, and finally aging, centrifugation, drying, crushing and sieving in sequence to obtain a layered double hydroxide intercalated with an organosulfur functional monomer.

[0038] Such as figure 1 Shown, the preparation method of layered double hydroxide comprises the steps:

[0039] S1: Preparation of ...

Embodiment 2

[0058] A layered double hydroxide is a layered double hydroxide containing diethyldithiocarbamic acid intercalation prepared by the method of the present invention. The specific steps and synthesis parameters are as follows:

[0059] (1) 0.75mol / L Mg 2+ and 0.25mol / L Al 3+ The composition of the first mixed solution and 1.5mol / L of NaOH and 1mol / L of Na 2 CO 3 The composed second mixed solution was added dropwise to deionized water with pH=10 at the same time, and the stirring was continued for at least 1 hour to obtain a third mixed solution.

[0060] (2) Aging the mixed solution at 75° C. for 24 hours to fully develop the crystals.

[0061] (3) Wash and centrifuge the synthesized material with degassed deionized water until the conductivity of the mixed solution is around 1000 μs / cm to remove excess salt and other impurities.

[0062] (4) Put the centrifuged dehydrated material into an ordinary drying oven, dry it to constant weight at 75°C, grind the material and pass i...

Embodiment 3

[0069] A layered double hydroxide is a layered double hydroxide containing thiomalic acid intercalation prepared by the method of the present invention. The specific steps and synthesis parameters are as follows:

[0070] (1) 0.83mol / L Mg 2+ and 0.17mol / L Fe 3+ The composition of the first mixed solution and 1mol / L of NaOH and 1.5mol / L of Na 2 CO 3 The composed second mixed solution was added dropwise to deionized water with pH=10.5 at the same time, and the stirring was continued for at least 1 hour to obtain a third mixed solution.

[0071] (2) Aging the mixed solution at 80° C. for 24 hours to fully develop the crystals.

[0072] (3) Wash and centrifuge the synthesized material with degassed deionized water until the conductivity of the mixed solution is around 1000 μs / cm to remove excess salt and other impurities.

[0073] (4) Put the centrifuged dehydrated material into an ordinary drying oven, dry it to constant weight at 80°C, grind the material and pass it through ...

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Abstract

The invention provides a preparation method of a layered double hydroxide, the layered double hydroxide and an application thereof, wherein the method is characterized in that an organic sulfur functional monomer containing sulfydryl is used as an interlayer anion, and the organic sulfur functional monomer intercalated layered double hydroxide is synthesized by adopting a pyrolysis-hydration reconstruction mode. The method is simple in synthesis process, easy to operate, relatively conventional in required equipment, low in production cost, green and non-toxic in adsorbing material and suitable for large-scale popularization and application. The organic sulfur functional monomer intercalated layered double hydroxide material can completely oxidize Cr (VI) into Cr (III), and then Cr (III) is quickly captured to the surface of the material through complexing action, so that organic unification of reduction and adsorption is realized, the treatment time is saved, the treatment cost is reduced, and the Cr pollution problem is thoroughly eliminated.

Description

technical field [0001] The invention relates to the technical field of adsorption material preparation technology, in particular to a layered double hydroxide intercalated with organic sulfur functional monomers, a preparation method and application thereof. Background technique [0002] With the development of industrial production, automobile exhaust emission and other activities, a large amount of heavy metals are discharged into water or soil, which seriously threatens ecological security and human health. As a highly toxic, teratogenic, carcinogenic, and mutagenic heavy metal, Cr(VI) has attracted widespread attention and strict control standards have been established. The Cr(VI) concentration in drinking water, surface water and sewage effluent is required not to exceed 0.05mg / L. Efficient removal of Cr(VI) in water or soil by adsorbents is one of the more popular treatment methods for Cr(VI) pollution. However, currently commonly used polymer composite materials, ze...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28C02F1/28C02F101/22
CPCB01J20/08B01J20/041C02F1/281B01J20/28033C02F2101/22
Inventor 管运涛张立勋贺方昕毛伟
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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