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Preparation method and application of MOF in-situ growth CNT magnetic material capable of activating persulfate

A technology of activating persulfate and in-situ growth, applied in the field of environmental pollution control, can solve the problems of large amount of oxidant, low removal efficiency, complicated preparation, etc., and achieve the effect of good removal effect, easy recycling and high degradation rate.

Active Publication Date: 2020-06-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. 201810934483.0 discloses an activated persulfate catalyst prepared with modified carbon nanotubes and its preparation and application, but its preparation is complicated, the amount of oxidant is large, and recovery is difficult
Patent No. 201810234261.8 discloses a method of using carbonyl magnetic metal composites to catalytically activate persulfate to remove endocrine disruptors in water, but the preparation is complicated and the removal efficiency is low
[0004] At present, there is no report on the removal of refractory organic matter in wastewater by activated persulfate based on bimetallic MOF in situ growth of carbon nanotubes

Method used

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  • Preparation method and application of MOF in-situ growth CNT magnetic material capable of activating persulfate
  • Preparation method and application of MOF in-situ growth CNT magnetic material capable of activating persulfate
  • Preparation method and application of MOF in-situ growth CNT magnetic material capable of activating persulfate

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Experimental program
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Effect test

Embodiment 1

[0054](1) Dissolve 3mmol of ferric nitrate and manganese nitrate in 8mL of methanol with a ratio of 1:1, add 6mmol of 2,5-dihydroxybenzoic acid and mix thoroughly, at 135°C Under hydrothermal reaction for 24 hours, the resulting precipitate was dried at 60°C to obtain the MOF precursor. The above-mentioned MOF precursor was mixed with melamine at a mass ratio of 1:100, and calcined in a nitrogen atmosphere at 800°C for two hours to prepare a magnetic material for in-situ growth of MOF carbon nanotubes.

[0055] (2) Prepare a 55 mg / L sulfamethazine solution at room temperature, take 50 mL of the solution in a 100 mL three-necked flask, add 5 mg of the above-mentioned magnetic material, and stir thoroughly.

[0056] (3) Add 25mg KHSO to the reaction system 5 , samples were taken at regular intervals, quenched with methanol, and the residual sulfamethazine concentration was determined using an instrument. See the experimental results figure 1 . Among them, C 0 is the initial...

Embodiment 2

[0058] In the material synthesis, the ratio of the amount of bimetallic substances in the bimetallic MOF was changed to 1:3 and 3:1 respectively, and the rest remained unchanged, repeating (2) and (3) in Example 1. See the experimental results figure 1 .

Embodiment 3

[0060] In the material synthesis, the combination of the bimetals in the bimetallic MOF was changed to Mn and Co, Fe and Co, respectively, and the others were kept unchanged, and (2) and (3) in Example 1 were repeated. Experimental results figure 2 .

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Abstract

The invention belongs to the field of environmental pollution treatment, and particularly relates to a preparation method and application of an MOF in-situ growth CNT magnetic material capable of activating persulfate. An MOF precursor is formed by dihydroxybenzoic acid and bimetallic salt, and is mixed and calcined with melamine at a proper temperature to prepare a magnetic material with in-situgrowth of carbon nanotubes, so that persulfate can be activated to efficiently remove refractory organic matters in water. Compared with the prior art, the magnetic material is stable in structure, easy to recycle and high in efficiency, and has excellent economic and technical advantages.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and relates to the technology of advanced oxidation technology for treating refractory organic matter in waste water, in particular to a magnetic material capable of activating persulfate metal-organic framework (MOF) to grow carbon nanotubes (CNT) in situ Preparation and application. Background technique [0002] Refractory organic matter is difficult to decompose through biological action under natural conditions, and they are often gradually concentrated through the food chain, which easily causes great harm to the environment and ecology. Therefore, it is of great significance to use efficient and economical methods to control the pollution of refractory organic compounds in the water environment. [0003] In recent years, advanced oxidation technology based on sulfate radical has been widely used in the treatment of refractory organic matter. Due to the high redox potential o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/48C02F101/30
CPCC02F1/72C02F1/488C02F2101/30
Inventor 刘福强江昊朱长青袁冉冉范钟伟李爱民
Owner NANJING UNIV