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Preparation method and application of polyhydroquinone film coated ferrocobalt magnetic catalyst

A magnetic catalyst, cobalt-iron alloy technology, applied in the direction of catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of difficult recovery of metal ions, Secondary pollution and other problems, to achieve the effect of rapid separation, easy separation and recovery, and easy recycling and reuse

Active Publication Date: 2021-01-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional transition metal dosing method is homogeneous catalysis, which makes it difficult to recover metal ions and easily leads to secondary pollution

Method used

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  • Preparation method and application of polyhydroquinone film coated ferrocobalt magnetic catalyst
  • Preparation method and application of polyhydroquinone film coated ferrocobalt magnetic catalyst
  • Preparation method and application of polyhydroquinone film coated ferrocobalt magnetic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 6mmol of cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) be dissolved in 40mL deionized water, add polyvinylpyrrolidone (PVP) of 5g / L, fully stir;

[0031] (2) Weigh 4mmol of potassium ferricyanide (K 3 [Fe(CN) 6 ])) was dissolved in 40 mL deionized water to obtain K 3 [Fe(CN) 6 ] solution, this solution is added dropwise in the cobalt chloride solution of step (1), after stirring for 30min, leave it to stand for aging for 24h to obtain the cobalt iron Prussian blue analogue Co 3 [Fe(CN) 6 ] 2 .

[0032] (3) will Co 3 [Fe(CN) 6 ] 2 After centrifugal separation and vacuum drying, it was placed in a muffle furnace for calcination at 600° C. (under nitrogen, heating rate 5° C. / min) for 2 hours to obtain cobalt-iron alloy magnetic powder.

[0033](4) Dissolve 0.8g of hydroquinone in ultrapure water, then add 0.4g of cobalt-iron alloy magnetic powder (mass ratio to PHQ is 1:2), and stir for 30min.

[0034] (5) within 1h, add 3mL of ferrous sulfate (FeSO 4...

Embodiment 2

[0039] The difference between the preparation process of this example and Example 1 is that step (4) ensures that the mass ratio of cobalt-iron alloy magnetic powder to PHQ is 1:3, and other preparation steps are the same. The above-prepared CoFe / PHQ (1:3) was applied to PS and H 2 o 2 Advanced oxidation system removes ATZ. The degradation conditions are as in Example 1. The removal ability of PS advanced oxidation system ATZ is as follows: Figure 4 Shown in curve (a), reaction carries out 60min, and ATZ removal rate reaches 100%; H 2 o 2 The removal ability of advanced oxidation system ATZ is as follows: Figure 4 As shown in the curve (b), the removal rate of ATZ reached 89.3% after the reaction was carried out for 60 minutes.

Embodiment 3

[0041] The difference between the preparation process of this example and Example 1 is that step (4) ensures that the mass ratio of cobalt-iron alloy magnetic powder to PHQ is 1:1, and other preparation steps are the same. The above-prepared CoFe / PHQ (1:1) was applied to PS and H 2 o 2 Advanced oxidation system removes ATZ. The degradation conditions are as in Example 1. The removal ability of PS advanced oxidation system ATZ is as follows: Figure 5 Shown in curve (a), reaction carries out 60min, and ATZ removal rate reaches 100%; H 2 o 2 The removal ability of advanced oxidation system ATZ is as follows: Figure 5 As shown in the curve (b), the removal rate of ATZ reached 88.1% after the reaction was carried out for 60 minutes.

[0042] As can be seen from Example 1, Example 2, and Example 3, changing the mass ratio of cobalt-iron alloy magnetic powder and PHQ has a greater impact on the catalytic ability of the catalyst, and when the mass ratio is 1:2, PS and H 2 o ...

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Abstract

The invention discloses a preparation method and application of a polyhydroquinone film coated cobalt-iron alloy magnetic catalyst, and relates to the technical field of research and development of heterogeneous magnetic catalysts of advanced oxidation systems. The method comprises: complexing cobalt chloride and potassium ferricyanide to obtain solid powder, calcining the obtained solid powder with nitrogen to obtain ferrocobalt alloy magnetic powder, then taking hydroquinone as a raw material, adding ferrous sulfate and hydrogen peroxide, and carrying out polymerization reaction to obtain the cobalt-iron alloy magnetic catalyst coated with the polyhydroquinone film. According to the present invention, the required materials are low in price, the synthesis process is simple, and the prepared catalyst has excellent catalytic effect in two advanced oxidation systems such as persulfate and hydrogen peroxide, can be recycled, and has good application prospects in wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of research and development of heterogeneous magnetic catalysts in advanced oxidation systems, and specifically relates to a preparation method and application of a cobalt-iron alloy magnetic catalyst wrapped by a polyhydroquinone film. Background technique [0002] The advanced oxidation process based on sulfate radicals and hydroxyl radicals is an advanced oxidation process that has attracted extensive attention in recent years. This technology has the characteristics of environmental protection and high efficiency. Persulfate (PS) is one of the commonly used oxidants for wastewater treatment in recent years, and hydrogen peroxide (H 2 o 2 ), it has the advantages of good stability, convenient storage and transportation. PS and H 2 o 2 The oxidizing ability itself is very weak and cannot effectively degrade pollutants, but after activation, it can produce strong oxidizing sulfate radicals (SO 4 · - )...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J23/75B01J27/24B01J37/02C02F1/72C02F101/30
CPCB01J31/069B01J23/75B01J37/0215B01J27/24C02F1/725C02F1/722C02F2101/306B01J35/33Y02W10/37
Inventor 孙治荣孙秀萍
Owner BEIJING UNIV OF TECH
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