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AuPd/Fe3O4 in-situ Electro-Fenton catalyst and preparation method and application thereof

A catalyst, fe3o4 technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of high energy consumption, unfavorable promotion and application, and increase the complexity of the use process. As well as energy consumption and other issues, to achieve the effect of low energy consumption, low cost and sustainable utilization

Inactive Publication Date: 2016-01-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In short, in the application of the catalyst disclosed by the ready-made technology, there are disadvantages such as the need to add chemical reagents or high energy consumption, which increases the complexity of the use process and energy consumption, which is not conducive to popularization and application.

Method used

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  • AuPd/Fe3O4 in-situ Electro-Fenton catalyst and preparation method and application thereof
  • AuPd/Fe3O4 in-situ Electro-Fenton catalyst and preparation method and application thereof
  • AuPd/Fe3O4 in-situ Electro-Fenton catalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0034] AuPd / substrate-based, and Pd / substrate-based catalysts generate hydrogen peroxide:

[0035] To eliminate Fe 3 o 4 The impact of the substrate on the decomposition of hydrogen peroxide produced, while highlighting the advantages of supporting AuPd alloys in the present invention, the catalyst used in this example is tested on the basis of carbon nanotubes that do not interfere with the decomposition of hydrogen peroxide, wherein in the AuPd alloy The loadings of Au and Pd were 2.5%, respectively, while the loading of the catalyst supporting Pd alone was 5%. Its synthesis method is as follows:

[0036] Weigh 1g of carbon nanotube powder each, and disperse them into two Erlenmeyer flasks A and B filled with 200mL ultrapure water. Palladium solution, add palladium chloride solution containing 0.05gPd to B; after ultrasonication for 5 minutes, stir to make it evenly dispersed; under stirring, use an ice-water bath to lower the temperature of the solution, and after the te...

Embodiment 2

[0043] AuPd / Fe loaded AuPd alloy with 2.5% mass fraction of gold and palladium 3 o 4 In-situ electro-Fenton catalysts, and Pd / Fe with a mass fraction of 5% Pd alone 3 o 4 Preparation of in situ electro-Fenton catalysts:

[0044] 1) Synthetic Catalyst Fe 3 o 4 Substrate: First, 1.5mL hydrazine hydrate aqueous solution (volume fraction 55%) and 1mL0.5mol / L ferrous sulfate solution were vigorously stirred for 30min; then transferred to a 40mL reactor and kept at 200°C for 24h; cooled to room temperature Finally, the obtained solid was washed three times with ultrapure water and ethanol respectively; finally, it was dried in a vacuum oven at 60° C. for 6 h and ground into a powder.

[0045] 2) Synthesis of AuPd / Fe 3 o 4 In-situ electro-Fenton catalyst: Weigh 1 g of Fe synthesized in step 1 3 o 4 Powder, dispersed in 200mL ultrapure water, after ultrasonication for 5min, add a certain amount of palladium chloride and chloroauric acid solution to make it contain 0.025g of A...

Embodiment 3

[0054] AuPd / Fe loaded AuPd alloy with 0.5% mass fraction of gold and palladium 3 o 4 In-situ electro-Fenton catalysts, and Pd / Fe with 1% Pd alone 3 o 4 Preparation of in situ electro-Fenton catalysts:

[0055] 1) Synthetic Catalyst Fe 3 o 4 Substrate: First, 1.5mL hydrazine hydrate aqueous solution (volume fraction 55%) and 1mL0.5mol / L ferrous sulfate solution were vigorously stirred for 30min; then transferred to a 40mL reactor and kept at 200°C for 24h; cooled to room temperature Finally, the obtained solid was washed three times with ultrapure water and ethanol respectively; finally, it was dried in a vacuum oven at 60° C. for 6 h and ground into a powder.

[0056] 2) Synthesis of AuPd / Fe 3 o 4 In-situ electro-Fenton catalyst: Weigh 1 g of Fe synthesized in step 1 3 o 4 Powder, dispersed in 200mL ultrapure water, after ultrasonication for 10min, add a certain amount of palladium chloride and chloroauric acid solution to make it contain 0.005g of Au and 0.005g of Pd...

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Abstract

The invention discloses an AuPd / Fe3O4 in-situ Electro-Fenton catalyst and a preparation method and application thereof. The AuPd / Fe3O4 in-situ Electro-Fenton catalyst is a composite formed by compounding aurum-palladium alloy and Fe3O4, wherein the substrate of the Fe3O4 is an octahedron, the average size is about 500 nm, the aurum-palladium alloy is attached to the Fe3O4, the capacity of aurum and the capacity of palladium are respectively 0.5-5%, and the aurum and the palladium are in zero valent state. The preparation method of the AuPd / Fe3O4 in-situ Electro-Fenton catalyst mainly comprises the steps that the prepared Fe3O4 powder is dispersed in ultrapure water with the mass-to-volume ratio being 200, ultrasound treatment is carried out for 5-10 min, and then a certain amount of palladium chloride and chloroauric acid solution is added, in a reaction system, by mass of the Fe3O4 powder, the mass of Au and the mass of Pd are respectively 0.5-5%, a reaction is carried out under certain conditions, and separation and drying are carried out to obtain the AuPd / Fe3O4 in-situ Electro-Fenton catalyst. The AuPd / Fe3O4 in-situ Electro-Fenton catalyst can be applied to organic waste water degradation efficiently, and is convenient to recycle.

Description

technical field [0001] The invention relates to an electric Fenton catalyst capable of simultaneously generating hydrogen peroxide and releasing iron in situ, a preparation method of the catalyst, and an application thereof in electrochemical treatment of organic polluted wastewater. Background technique [0002] With the development of my country's industry, all kinds of wastewater containing a large amount of refractory organic pollutants continue to enter the environment, which brings great harm to the environment and also brings great difficulties to sewage treatment. In recent years, advanced oxidation process (AOP) has received more and more attention in the treatment of refractory organic wastewater due to its high efficiency. Electro-Fenton oxidation, as a kind of AOP technology, is widely used in various fields. In the Fenton reaction, ferrous ions react with hydrogen peroxide to generate highly oxidative hydroxyl radicals, which can directly decompose pollutants i...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72B01J23/89C02F101/30
Inventor 兰华春覃英华孙猛曲久辉刘锐平刘会娟
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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