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Core-shell-structured hierarchical iron/copper bimetallic Fenton catalyst and preparation method and application thereof

A technology of iron catalyst and copper catalyst, applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, chemical instrument and method, etc., can solve the problem of poor long-term stability of catalyst, easy leakage of Fe ions, catalyst Reduced catalytic efficiency and other issues, to achieve excellent catalytic performance, good reusability, stable catalyst effect

Active Publication Date: 2019-12-13
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

The copper ferrite obtained by the former has higher catalytic efficiency and a wider pH range, but Fe ions are easy to leak, and the long-term stability of the catalyst is poor; although the Fe / Cu catalyst obtained by the latter increases the stability of Fe, However, due to the dense layer of Cu covering the surface of Fe, the overall catalytic efficiency of the catalyst is reduced.

Method used

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  • Core-shell-structured hierarchical iron/copper bimetallic Fenton catalyst and preparation method and application thereof
  • Core-shell-structured hierarchical iron/copper bimetallic Fenton catalyst and preparation method and application thereof
  • Core-shell-structured hierarchical iron/copper bimetallic Fenton catalyst and preparation method and application thereof

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preparation example Construction

[0030] The embodiment of the present invention also provides a preparation method of the above-mentioned core-shell hierarchical iron / copper bimetallic Fenton catalyst, comprising the following steps,

[0031] 1) Preparation of the isolated iron catalyst: adding the zeolite to the ferric salt solution, stirring and reacting, centrifuging and washing with deionized water, and freeze-drying to obtain the isolated iron catalyst;

[0032] 2) Preparation of the core-shell graded iron / copper bimetallic catalyst: add the isolated iron catalyst obtained in step 1) into the divalent copper salt solution and stir for a certain period of time, then centrifugally wash with deionized water, freeze-dry to obtain the core Shell graded iron / copper bimetallic Fenton catalysts.

[0033] The method provided in this example uses zeolite as a raw material, and sequentially prepares a core-shell graded iron / copper bimetallic Fenton catalyst by "reacting with ferric salt solution—freeze drying—reactin...

Embodiment 1

[0048] Prepare 500mL of 2000mg / L ferric chloride solution with pH=1.6, then add 10g of 4A type zeolite into it, stir and react for 4h, centrifuge and wash with deionized water, then freeze-dry at -10℃~-80℃ to obtain isolated iron catalyst.

[0049] Prepare 500 mL of copper chloride solution with a copper ion concentration of 2000 mg / L pH=1.6, add 10 g of the prepared isolated iron catalyst to it, stir for 5 h, wash with centrifuge, and then freeze-dry at -10°C to -80°C to obtain Core-shell hierarchical iron / copper bimetallic Fenton catalysts.

[0050] The obtained core-shell graded iron / copper bimetallic Fenton catalyst is added to the phenol solution, and the catalytic reaction is carried out at normal temperature and pH=2 conditions, wherein the molar ratio of hydrogen peroxide and phenol is 14:1, the mass of catalyst and phenol The ratio is 5:1.

Embodiment 2

[0052] The preparation method of core-shell graded iron / copper bimetallic Fenton catalyst is the same as in Example 1

[0053] The method for degrading phenol with the core-shell hierarchical iron / copper bimetallic Fenton catalyst is the same as in Example 1, except that the pH of the solution is 5.

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Abstract

The invention provides a core-shell-structured hierarchical iron / copper bimetallic Fenton catalyst and a preparation method and application thereof, belonging to the technical field of degradation treatment of organic pollutants in wastewater in virtue of Fenton catalysts. The preparation method comprises the following steps: adding zeolite into a ferric iron salt solution, carrying out stirring for a reaction, then carrying out centrifugal washing with deionized water, and performing freeze drying to obtain an isolated iron catalyst; and then adding the obtained isolated iron catalyst into abivalent copper salt solution, carrying out a stirring reaction for a certain period of time, then carrying out centrifugal washing with deionized water, and carrying out freeze drying to obtain the core-shell-structured hierarchical iron / copper bimetallic Fenton catalyst. The catalyst prepared in the invention has a wide pH application range, can be used for Fenton oxidation degradation of organic pollutants in high-pH environmental sewage and has excellent catalytic performance and reusability; and an effective method for is provided for the application of the bimetallic Fenton catalyst anddegradation treatment of sewage.

Description

technical field [0001] The invention belongs to the technical field of Fenton catalysts for degrading and treating organic pollutants in wastewater, and in particular relates to a core-shell graded iron / copper bimetallic Fenton catalyst and its preparation method and application. Background technique [0002] In recent years, the protection of water resources has become one of the serious issues affecting people's quality of life and ensuring sustainable development of the environment. Among various sewage treatment methods, the Fenton method is widely used in wastewater treatment, especially in the process of biodegradable sewage treatment, because of its rapid degradation rate, low toxicity, simple operation, non-toxic effect on subsequent treatment, and environmental friendliness. received widespread attention. [0003] The traditional Fenton reaction mechanism leads to relatively harsh reaction conditions and high requirements for the acidity of the reaction. Usually, ...

Claims

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Application Information

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IPC IPC(8): B01J31/16B01J31/30C02F1/72C02F101/34C02F101/36
CPCB01J31/1625B01J31/30C02F1/722C02F1/725C02F2101/345C02F2101/36C02F2305/026B01J2531/842
Inventor 张玉忠黄莉兰李泓李德源
Owner TIANJIN POLYTECHNIC UNIV
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