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Iron-cobalt bimetal organic framework derived electro-Fenton catalyst and preparation method and application thereof

An organic framework and bimetallic technology, applied in the application field of electro-Fenton catalyst and its preparation, and refractory organic matter, can solve the problems of poor catalytic activity, narrow applicable pH range, low stability, etc., achieve good removal effect, improve Catalytic activity, the effect of mild reaction conditions

Pending Publication Date: 2022-03-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of electro-Fenton catalyst derived from iron-cobalt bimetallic organic framework and its preparation method and application, which can effectively solve the problems of poor catalytic activity, low stability and narrow applicable pH range of existing catalysts; And it can be better applied to the removal of refractory organic matter in water by electro-Fenton method

Method used

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  • Iron-cobalt bimetal organic framework derived electro-Fenton catalyst and preparation method and application thereof
  • Iron-cobalt bimetal organic framework derived electro-Fenton catalyst and preparation method and application thereof
  • Iron-cobalt bimetal organic framework derived electro-Fenton catalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] 1. Weigh 582.06mg (2mmol) of cobalt nitrate hexahydrate, 83.42mg (0.3mmol) of ferrous sulfate heptahydrate and 131.36mg of 2-methylimidazole, add 40mL N,N-dimethylformamide, magnetically stir until cobalt nitrate hexahydrate, ferrous sulfate heptahydrate and 2-methylimidazole are dissolved to obtain a basic solution;

[0029] 2. Transfer the basic solution to a 100mL polytetrafluoroethylene-lined stainless steel reaction kettle, and conduct a hydrothermal reaction in a blast drying oven for 24 hours at a reaction temperature of 180°C. The precipitate obtained from the reaction is suction filtered, washed with methanol and water Dry for 24 hours to obtain a bimetallic organic framework;

[0030] 3. Place the obtained bimetallic organic framework in a crucible, carry out carbonization under an argon atmosphere, raise the temperature to 435° C. and keep it for 8 hours to obtain an electro-Fenton catalyst derived from an iron-cobalt bimetallic organic framework.

[0031] T...

Embodiment 2

[0033] The electro-Fenton catalyst derived from the iron-cobalt bimetallic organic framework prepared in Example 1 was ultrasonically mixed with ethanol and deionized water, and then coated on carbon cloth to prepare a gas diffusion electrode, which was used as the cathode of the electro-Fenton catalytic system. The ratio of cobalt bimetallic organic framework-derived electro-Fenton catalyst, ethanol, and deionized water was 6mg: 0.3mL: 0.1mL. Prepare sulfamethoxazole containing 20mg / L, 0.05mol / L Na at room temperature 2 SO 4 pollutant solution, the pH of the solution is initial pH=5.24, take the pollutant solution in the electric Fenton reactor, insert the anode and the reference electrode, wherein the anode is a platinum sheet electrode, and the reference electrode is a saturated calomel electrode, apply- The constant voltage of 0.5V.vs SCE carries out the electro-Fenton catalytic reaction to complete the treatment of sulfamethoxazole wastewater.

[0034] During the electr...

Embodiment 3

[0036] Except for the following scheme, it is the same as Example 1: the amount of cobalt nitrate hexahydrate and ferrous sulfate heptahydrate in step 1 is 2mmol: 1.2mmol and 1mmol: 0.3mmol respectively; the obtained iron-cobalt bimetallic organic framework derived Electric Fenton catalyst carries out waste water treatment according to the mode of operation of embodiment 2, and the result is as follows figure 2 Shown: 60min to the removal rate of sulfamethoxazole were 65.85% and 81.37%.

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Abstract

The invention relates to a preparation method of an iron-cobalt bimetal organic framework derived electro-Fenton catalyst, which comprises the following steps: dissolving ferrite, cobalt salt and 2-methylimidazole in an organic solvent, and uniformly mixing to obtain a basic solution; carrying out a hydrothermal reaction on the obtained basic solution, and separating, washing and drying the obtained precipitate to prepare an iron-cobalt bimetal organic framework; and carbonizing the iron-cobalt bimetal organic framework in an inert gas atmosphere to prepare the iron-cobalt bimetal organic framework derived electro-Fenton catalyst. Meanwhile, the invention relates to application of the Fe-Co bimetal organic framework derived electro-Fenton catalyst in removal of refractory organic matters in water. According to the Fe-Co bimetal organic framework-derived electro-Fenton catalyst and the preparation method and application thereof provided by the technical scheme, the catalyst can effectively solve the problems of poor catalytic activity, low stability and narrow applicable pH range of the existing catalyst; and the composite material can be well applied to removal of refractory organic matters in water by an electro-Fenton method.

Description

technical field [0001] The invention relates to the technical field of electro-Fenton catalysts, in particular to an electro-Fenton catalyst derived from an iron-cobalt bimetallic organic framework, a preparation method thereof, and an application for treating refractory organic matter in water. Background technique [0002] Chemical, pharmaceutical, pesticide and other industrial production wastewater contains antibiotics, dyes and other refractory organic substances, which are highly toxic and difficult to remove. The advanced oxidation technology has high efficiency and thorough degradation in treating refractory organic matter. Among them, the electro-Fenton technology can generate hydrogen peroxide in situ, avoiding the risk of storage and transportation of high-concentration hydrogen peroxide, and improving the utilization efficiency of hydrogen peroxide. However, the traditional homogeneous electric Fenton has strict pH requirements (2.5-3.5), and the addition of ferr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/08B01J37/10B01J37/08C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J23/75B01J37/10B01J37/086C02F1/725C02F2305/026C02F2101/308C02F2101/345C02F2101/34C02F2101/36C02F2101/38C02F2101/40B01J35/33B01J35/51
Inventor 刘福强郑豪荆世超刘宇涛姜笔存李爱民
Owner NANJING UNIV
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