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Stratified hydroxide composite material and preparation method thereof

A layered hydroxide and composite material technology, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve the problems of limited application range, lack of selectivity of guest molecules, etc., and achieve high specific surface area Effect

Inactive Publication Date: 2013-07-24
BEIJING NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Layered double metal hydroxide is a hydroxide with hydrotalcite layer structure composed of divalent metal ions and trivalent metal ions, also known as mixed metal hydroxide; layered double metal hydroxide has brucite Sheet structure, the laminates are positively charged due to the isomorphic replacement of divalent metal ions by trivalent metal ions, and the charge of the guest anion that can be exchanged between the layers is balanced with the positive charges of the laminates, making the layered double metal hydroxide an electric charge. Neutral, layered double metal hydroxide has a large anion exchange capacity (AEC, 2~3mep / g), and is easy to accept guest anions, so it can be used to adsorb metals and organic pollutants in the form of negative ions in water bodies , but this type of material lacks selectivity to guest molecules, which limits the range of applications

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  • Stratified hydroxide composite material and preparation method thereof
  • Stratified hydroxide composite material and preparation method thereof

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[0034] The present invention also provides a method for preparing the above-mentioned hydroxide composite material, comprising: A) roasting the layered hydroxide to obtain a composite oxide; B) mixing the composite oxide, sulfonated calixarene and water, and reacting Finally, the layered hydroxide composite material is obtained.

[0035] All the raw materials of the present invention have no special limitation on their sources, they can be purchased on the market or made by themselves. The layered hydroxide and sulfonated calixarene are all the same as above, and will not be repeated here; the water is preferably exhausted through an inert gas such as nitrogen, which can avoid the impact of oxygen and other gases on the layered layer. The effect of hydroxide.

[0036] The preparation methods of the layered hydroxide and sulfonated calixarene can be prepared by methods well known to those skilled in the art, and there is no special limitation.

[0037] The invention utilizes ...

Embodiment 1

[0045] 1.1 Add 10mmol (1.363g) ZnCl 2 , 5mmol (1.207g) AlCl 3 ·6H 2 O. 35mmol (2.102g) urea was mixed with 1L water, under the condition of reflux at 100°C, after continuous stirring for 24h, the precipitate was filtered, washed with deionized water and absolute ethanol, and dried in vacuum at 40°C to obtain ZnAl-CO 3 layered double hydroxides.

[0046] 1.2 Combine the ZnAl-CO obtained in 1.1 3 The layered double metal hydroxide was calcined at 400°C for 4 hours in air to obtain a composite oxide.

[0047] 1.3 Add 0.1g of sulfonated thiacalix[4]arene to 10ml of exhaust water, then add 0.1g of the composite oxide obtained in 1.2, seal it, stir it magnetically for 48 hours, centrifuge, wash with exhaust water three times, and place Dry in air to obtain a layered hydroxide composite material.

[0048] Using X-ray diffractometer to analyze the ZnAl-CO obtained in 1.1 3 Layered double metal hydroxide, the composite oxide obtained in 1.2 and the layered hydroxide composite mat...

Embodiment 2

[0051] 2.1 Add 10mmol (1.363g) ZnCl 2 , 5mmol (1.207g) AlCl 3 ·6H 2 O. 35mmol (2.102g) urea was mixed with 1L water, under the condition of reflux at 100°C, after continuous stirring for 24h, the precipitate was filtered, washed with deionized water and absolute ethanol, and dried in vacuum at 40°C to obtain ZnAl-CO 3 layered double hydroxides.

[0052] 2.2 The ZnAl-CO obtained in 2.1 3 The layered double metal hydroxide was calcined at 400°C for 4 hours in air to obtain a composite oxide.

[0053] 2.3 Add 0.05g of sulfonated thiacalix[4]arene to 10ml of degassed water, then add 0.1g of the composite oxide obtained in 2.2, seal it, stir it magnetically for 48 hours, centrifuge, wash with degassed water three times, and place Dry in air to obtain a layered hydroxide composite material.

[0054] Utilize X-ray diffractometer to analyze the layered hydroxide composite material obtained in 2.3, obtain its X-ray diffraction pattern, as figure 2 Shown, where b is the layered h...

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Abstract

The invention provides a stratified hydroxide composite material and a preparation method thereof, wherein the stratified hydroxide composite material is obtained by reacting a stratified hydroxide with sulfonatocalixarene. Compared with the prior art, the composite material of stratified hydroxide and calixarene provided by the invention has the advantages of high specific surface area, porosity and the like of the stratified hydroxide, and meanwhile, the composite material is also capable of realizing selective absorption for phenol organic materials by means of the unique cavity structure of the calixarene compound, and the hydrophily and hydrophobicity of the cavity and the side-chain substituent group.

Description

technical field [0001] The invention belongs to the technical field of new materials and water pollution treatment agents, and in particular relates to a layered hydroxide composite material and a preparation method thereof. Background technique [0002] The shortage of water resources and serious water pollution are one of the major problems facing society today. One of the ways to solve this problem is to treat the sewage to a certain extent so that it can meet the standard of reuse. At present, good results have been achieved in the treatment of general pollutants in sewage at home and abroad, and the purpose of reuse can basically be achieved according to demand. However, the control of trace amounts of persistent organic pollutants (POPs) in water is still a difficult problem. The high toxicity, tertiary effects, and endocrine desiccation effects of POPs in the water environment have created serious environmental problems. Chlorophenols are a kind of POPs that are re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 马淑兰潘国华张育孙亚红
Owner BEIJING NORMAL UNIVERSITY
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