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A kind of preparation method of magnetic adsorption material based on Prussian blue and hydrotalcite

A magnetic adsorption material, Prussian blue technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of difficult recovery, poor recycling effect, etc., to reduce costs and solve the secondary treatment of water bodies Problem, effect of simple preparation method

Active Publication Date: 2022-05-13
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The concept of the present invention is such that in view of the shortcomings of traditional adsorption materials that are difficult to recycle and have poor recycling effects, LDHs materials with "memory effect" are selected and grown on magnetic nano-nuclei in situ to achieve preparation under the action of a magnetic field. Under the aim of fast recovery and recyclable adsorbent material

Method used

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  • A kind of preparation method of magnetic adsorption material based on Prussian blue and hydrotalcite
  • A kind of preparation method of magnetic adsorption material based on Prussian blue and hydrotalcite
  • A kind of preparation method of magnetic adsorption material based on Prussian blue and hydrotalcite

Examples

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Effect test

Embodiment 1

[0027] Example 1 Synthesis of ZnAl-LDH on the surface of PB, forming Fe after calcination 3 o 4 The preparation process of @ZnAl-LDO magnetic composite material includes the following steps:

[0028] a: Take 0.3 g PB and disperse it in 70 mL aqueous solution dissolved with zinc chloride, aluminum nitrate, urea and citric acid, and the concentration of urea is 0.1 mol L –1 , the concentration of citric acid is 0.02 mol L –1 , the concentration of zinc ions is 0.03 mol L –1 , the concentration of aluminum ions is 0.01 mol L –1 ;

[0029] b: Put in a 100 mL reactor, react at 100°C for 24 h, wash and dry the obtained solid product;

[0030] c: Put the product obtained in step b into a tube furnace with a heating rate of 5°C min –1 , calcined at 400°C for 5 h under nitrogen atmosphere to obtain Fe 3 o 4 @ZnAl-LDO magnetic composite.

Embodiment 2

[0031] Example 2 Synthesis of CoAl-LDH on the surface of PB, forming Fe after calcination 3 o 4 The preparation process of @CoAl-LDO magnetic composite material includes the following steps:

[0032] a: Take 0.4 g PB and disperse it in 100 mL aqueous solution dissolved with cobalt chloride, aluminum nitrate, urea, and citric acid, and the concentration of urea is 0.4 mol L –1 , the concentration of citric acid is 0.08 mo L –1 , the concentration of cobalt ions is 0.02 mo L–1 , the concentration of aluminum ions is 0.08 mol L –1 ;

[0033] b: Put in a 200 mL reactor, react at 110°C for 20 h, wash and dry the obtained solid product;

[0034] c: Put the product obtained in step b into a tube furnace with a heating rate of 2°C min –1 , calcined at 500°C for 5 h under helium atmosphere to obtain Fe 3 o 4 @CoAl-LDO Magnetic Composite.

Embodiment 3

[0035] Example 3 Synthesis of MgAl-LDH on the surface of PB, forming Fe after calcination 3 o 4 The preparation process of @MgAl-LDO magnetic composite material includes the following steps:

[0036] a: Disperse 1.0 g of PB in 300 mL of aqueous solution dissolved in magnesium chloride, aluminum nitrate, urea, and citric acid, in which the concentration of urea is 0.8 mol L –1 , the concentration of citric acid is 0.1 mol L –1 , the concentration of magnesium ions is 0.05 mol L –1 , the concentration of aluminum ions is 0.03 mol L –1 ;

[0037] b: Put in a 500 mL reactor, react at 110°C for 20 h, wash and dry the obtained solid product;

[0038] c: Put the product obtained in step b into a tube furnace with a heating rate of 2°C min –1 , calcined at 600°C for 4 h under nitrogen atmosphere to obtain Fe 3 o 4 @MgAl-LDO magnetic composites.

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Abstract

The invention discloses a method for preparing iron tetraoxide (Fe 3 o 4 ) is a magnetic core, which is coated with a core-shell structure composite material of layered double oxides (Layered Double Oxides, LDOs). First, by adjusting the solvent environment, the coordination nucleation and growth sites of layered double hydroxides (Layered Double Hydroxides, LDHs) are formed on the surface of Prussian Blue (Prussian Blue, PB), so that LDHs grow on the surface of PB, A PB@LDHs core-shell composite with PB as the core and LDHs as the shell is formed, and after further high temperature treatment, PB is converted into Fe 3 o 4 , LDHs lose water and transform into LDOs, and obtain Fe 3 o 4 is the magnetic core, LDOs is the Fe in the shell 3 o 4 @LDOs magnetic adsorption material. The LDOs in the shell layer have good adsorption properties, and the Fe in the core layer 3 o 4 Has excellent magnetic properties. Under the action of a magnetic field, Fe 3 o 4 @LDOs composites can be rapidly separated from water. The obtained Fe 3 o 4 The @LDOs composite exhibits a core-shell structure and can be widely used in the fields of pollutant adsorption, degradation, and photocatalysis.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic nanomaterials, in particular to a kind of Prussian blue coated with hydrotalcite as a precursor, which is obtained through roasting treatment to obtain Fe 3 o 4 The invention relates to a preparation method of a magnetic adsorption material in which the core is the magnetic core and the LDOs are the shell. Background technique [0002] Industrial wastewater often contains high concentrations of organic pollutants, such as dyes, tetracyclines, slick oils, phenolic compounds, etc.) or inorganic pollutants such as heavy metals, fluorides, etc., which are difficult to meet discharge standards through ordinary biological treatment. The commonly used treatment methods are chemical method, ion exchange method and physical adsorption method. Among them, chemical precipitation or oxidation can only treat some wastewater with simple components. The cost of membrane materials in the ion exchange meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/06B01J20/04B01J20/28B01J20/30
CPCB01J20/08B01J20/06B01J20/041B01J20/28009B01J20/3078
Inventor 张瑞康王灿高元哲韩占刚
Owner HEBEI NORMAL UNIV
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