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Nickel-doped manganese ferrite coated magnesium silicate composite catalyst and preparation method and application thereof

A technology of composite catalyst and manganese ferrite, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of ineffective removal of basic fuchsin, achieve rapid and complete degradation in a short time, Fast speed, no secondary pollution effect

Active Publication Date: 2018-01-26
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional wastewater biological treatment process cannot effectively remove basic fuchsin (BF)

Method used

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  • Nickel-doped manganese ferrite coated magnesium silicate composite catalyst and preparation method and application thereof
  • Nickel-doped manganese ferrite coated magnesium silicate composite catalyst and preparation method and application thereof
  • Nickel-doped manganese ferrite coated magnesium silicate composite catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 Ni-MnFe 2 o 4 @M-S-H Catalyst

[0017] (1) Preparation method

[0018] 1. Nickel-doped manganese ferrite (Ni-MnFe 2 o 4 ) preparation: 3.636g Fe(NO 3 ) 3 9H 2 O and 0.1428g Ni(NO 3 ) 3 ·6H 2 O and 0.5mL 50%Mn(NO 3 ) 2 Mix and dissolve in 30ml ultrapure water, adjust the pH to 12.0 with NaOH, and stir evenly to obtain nickel-doped manganese ferrite (Ni-MnFe 2 o 4 ). molar ratio Fe 3+ :Mn 2+ =2:1, by weight percentage, Ni content is 0.9%.

[0019] 2. Preparation of magnesium silicate (M-S-H): Mix 2.0mol / L magnesium nitrate aqueous solution and 3.0mol / L sodium silicate aqueous solution to form a precipitate, wash the precipitate with ultrapure water until neutral, filter, dry, and grind to obtain Magnesium silicate powder.

[0020] 3. According to the mass ratio, Ni-MnFe 2 o 4 : M-S-H=(1.0:0)-(1.0:1.5), take nickel-doped manganese ferrite (Ni-MnFe 2 o 4 ) and magnesium silicate, after mixing, the mixture is transferred to a polytetrafluoroet...

Embodiment 2

[0028] Example 2 Degradation of organic pollutants basic fuchsin

[0029] (1) Preparation method

[0030] 1. Nickel-doped manganese ferrite (Ni-MnFe 2 o 4 ) preparation: 3.636g Fe(NO 3 ) 3 9H 2 O and 0.1428g Ni(NO 3 ) 3 ·6H 2 O and 0.5mL 50% Mn(NO 3 ) 2 Mix and dissolve in 30ml ultrapure water, adjust the pH to 12.0 with NaOH, and stir evenly to obtain nickel-doped manganese ferrite (Ni-MnFe 2 o 4 ). molar ratio Fe 3+ :Mn 2+=2:1, by weight percentage, Ni content is 0.9%.

[0031] 2. Preparation of magnesium silicate (M-S-H): Mix 2.0mol / L magnesium nitrate aqueous solution and 3.0mol / L sodium silicate aqueous solution to form a precipitate, wash the precipitate with ultrapure water until neutral, filter, dry, and grind to obtain Magnesium silicate powder.

[0032] 3. According to the mass ratio, Ni-MnFe 2 o 4 : M-S-H=1.0:1.0, take nickel-doped manganese ferrite (Ni-MnFe 2 o 4 ) and magnesium silicate, after mixing, the mixture is transferred to a polytetrafl...

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PUM

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Abstract

The invention relates to a nickel-doped manganese ferrite coated magnesium silicate composite catalyst and a preparation method and an application thereof. The preparation method comprises the steps:mixing ferric nitrate with manganese nitrate and nickel nitrate, dissolving in ultrapure water, adjusting the pH to 12.0, then adding a proper amount of magnesium silicate, transferring the mixture toa polytetrafluoroethylene reaction tank, placing in a high pressure reaction kettle, sealing, in a microwave digestion instrument, under the pressure of 1.5 MPa, carrying out microwave hydrothermal reaction of 30.0 min, washing the precipitate with ultrapure water to neutral, filtering, and drying to obtain the target product. As a new method for treating dye wastewater, the composite catalyst has the advantages of high degradation efficiency, fast degradation speed, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the field of catalytic degradation, and in particular relates to a nickel-doped manganese ferrite-coated magnesium silicate composite catalyst prepared by a microwave hydrothermal method, a preparation method thereof, and an application in microwave catalytic degradation of organic pollutants in water. Background technique [0002] Dye wastewater is a kind of complex wastewater rich in refractory organic pollutants, dark in color and high in toxic substances, which will pose a huge threat to the water environment. At present, dye wastewater is usually treated by chemical methods, physical chemical methods, biological methods, or a combination of them. Since traditional sewage treatment cannot eliminate most of these pollutants, powerful purification methods for dye wastewater have been increasingly favored. more attention. [0003] Textile printing and dyeing wastewater, characterized by dark color, low biodegradability, and h...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/10B01J37/34C02F1/30C02F1/72C02F101/30C02F101/36C02F101/38
Inventor 张朝红富璐刘逸伦李芳轶王君宋有涛纪剑峰刘明宇
Owner LIAONING UNIVERSITY
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