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Manganese dioxide-anion clay composite material, preparation method and application thereof

An anionic clay and composite material technology, which is applied in the field of degrading environmental hormones, manganese dioxide-anionic clay composite materials and their preparation, can solve the problems of large influence of oxidation pH value, application limitation, water quality influence, etc., and is easy to popularize. , strong practicability, mild reaction conditions

Active Publication Date: 2017-12-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the redox reaction of manganese dioxide will produce a certain amount of Mn 2+ , Mn 2+ will have some impact on water quality
In addition, the oxidation of manganese dioxide is greatly affected by the pH value in the water environment
Therefore, its application in water treatment has been limited to some extent.

Method used

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  • Manganese dioxide-anion clay composite material, preparation method and application thereof
  • Manganese dioxide-anion clay composite material, preparation method and application thereof
  • Manganese dioxide-anion clay composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of MnO with degradability 2 - Anionic clay mineral composites (0.01M-MnO 2 -Mg 2 The preparation method of Al anion clay composite material), comprises the following steps:

[0037] (1) Accurately weigh Mg(NO 3 ) 2 ·6H 2 O 25.64g (0.10mol), Al(NO 3 ) 3 9H 2 O 18.83g (0.05mol), add 150mL deionized water, stir ultrasonically to make it dissolve (Mg 2+ :Al 3+ The molar ratio of =2:1), Mg 2+ and Al 3+ The total concentration is 1.0mol / L; under the condition of inert gas protection and stirring, titrate with 1.0mol / L NaOH solution at 35°C until pH = 10 (LHD has better crystallinity), and continue stirring for 1h , aged at 60°C for 24h, then filtered, washed, and dried (dried at 60°C for 24h) to obtain magnesium-aluminum anion clay (Mg 2 Al-LDH);

[0038] (2) Add 1g of Mg 2 Al-LDH was added to 200ml 0.01mol / L potassium permanganate solution and stirred for 15min, ultrasonicated in an ultrasonic cleaner for 15min (ultrasonic power is 400W), and then stirred ...

Embodiment 2

[0042] A kind of MnO with degradability 2 - Anionic clay mineral composites (0.05M-MnO 2 -Mg 2 The preparation method of Al anion clay composite material), comprises the following steps:

[0043] (1) Magnesium aluminum anionic clay (Mg 2 The preparation of Al-LDH) is identical to that of step (1) in Example 1;

[0044] (2) Add 1g of Mg 2 Al-LDH was added to 200ml 0.05mol / L potassium permanganate solution and stirred for 15min, ultrasonicated in an ultrasonic cleaner for 15min (ultrasonic power is 400W), and then stirred and adsorbed for 24h to obtain a suspension slurry;

[0045] (3) Under the condition of stirring, add 0.8g NaOH to the suspension slurry of step (2), then slowly drop into the MnCl of 150ml 0.1mol / L 2 Solution (KMnO 4 : MnCl 2 The molar ratio is =2:3), continue to stir for 2h after the dropwise addition, and crystallize for 24h at 60°C to obtain a crystallized product;

[0046] (4) The crystallized product of step (3) was centrifuged and washed 5 times ...

Embodiment 3

[0048] A kind of MnO with degradability 2 - Anionic clay mineral composites (0.1M-MnO 2 -Mg 2 The preparation method of Al anion clay composite material), comprises the following steps:

[0049] (1) Magnesium aluminum anionic clay (Mg 2 The preparation of Al-LDH) is identical to that of step (1) in Example 1;

[0050] (2) Add 1g of Mg 2 Al-LDH was added to 200ml 0.1mol / L potassium permanganate solution and stirred for 15min, ultrasonicated in an ultrasonic cleaner for 15min (ultrasonic power is 400W), and then stirred and adsorbed for 24h to obtain a suspension slurry;

[0051] (3) Under the condition of stirring, add 1.6g NaOH to the suspension slurry of step (2), then slowly drop into the MnCl of 300ml 0.1mol / L 2 Solution (KMnO 4 : MnCl 2 The molar ratio is =2:3), continue to stir for 2h after the dropwise addition, and crystallize for 24h at 60°C to obtain a crystallized product;

[0052] (4) The crystallized product of step (3) was centrifuged and washed 5 times wi...

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Abstract

The invention belongs to the field of an environmental functional material and discloses a manganese dioxide-anion clay composite material, a preparation method and an application thereof. The method comprises the following steps: (1) uniformly stirring anion clay and potassium permanganate solution, ultrasonically treating, stirring and absorbing, thereby acquiring suspension slurry; (2) adding alkali into the suspension slurry under a stirring condition, and then slowly dropping into divalent manganese ion solution, continuously stirring after dropping and crystallizing for 16-24h at 50-80 DEG C, thereby acquiring a crystallized product; and (3) washing and drying the crystallized product, thereby acquiring a MnO2-anion clay composite material. The composite material has better catalysis performance, short catalysis time and high catalytic efficiency and is used for decomposing environmental hormone bisphenol a.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, and relates to an anionic clay composite material with degradation performance, in particular to a manganese dioxide-anionic clay composite material and a preparation method thereof. The composite material is used for degrading organic pollutants, especially Is the degradation of environmental hormones. Background technique [0002] Bisphenol A organic pollution mainly comes from the manufacture of polycarbonate and epoxy resin, plastic stabilizers and antioxidants, and household products. It is an important class of environmental hormones and has become one of the most common pollutants in the world. The best way to remove organic pollutants is to completely mineralize them. Therefore, oxidative degradation is one of the most ideal methods for removing organic pollutants. [0003] Manganese is abundant in natural resources, the abundance of manganese in the earth's crust is se...

Claims

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Application Information

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IPC IPC(8): B01J23/34C02F1/72C02F101/30C02F101/34
CPCB01J23/34C02F1/725C02F2101/30C02F2101/345
Inventor 吴平霄刘崇敏朱能武党志
Owner SOUTH CHINA UNIV OF TECH