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Nanoparticle catalysts supporting cocr(mn/al)feni high-entropy alloys and their preparation methods and applications

A technology of nanoparticles and high-entropy alloys, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as existing limitations, and achieve simple operation, Achieve the effect of integrated utilization and simple preparation equipment

Active Publication Date: 2020-03-17
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material prepared by this method is a bimetallic support, which has limitations.

Method used

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  • Nanoparticle catalysts supporting cocr(mn/al)feni high-entropy alloys and their preparation methods and applications
  • Nanoparticle catalysts supporting cocr(mn/al)feni high-entropy alloys and their preparation methods and applications
  • Nanoparticle catalysts supporting cocr(mn/al)feni high-entropy alloys and their preparation methods and applications

Examples

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preparation example Construction

[0036] A kind of preparation method of the nano particle catalyst of supporting CoCr(Mn / Al)FeNi high entropy alloy of the present invention, comprises the following steps:

[0037] Step 1, first take the substrate, wash it repeatedly with deionized water by ultrasonic vibration, filter and dry at 45-55°C for 12-24 hours to obtain a spare substrate;

[0038] Step 2, prepare CoCr(Mn / Al)FeNi high-entropy alloy nanoparticles by impregnation method, take metal nitrate precursors, including Co(NO 3 ) 2 ·6H 2 O, CrN 3 o 9 9H 2 O, MnN 2 o 6 4H 2 O or Al(NO 3 ) 3 9H 2 O, FeN 3 o 9 9H 2 O and Ni(NO 3 ) 2 ·6H 2 O, and add ethanol solution to dissolve it, obtain precursor solution;

[0039] Step 3, immerse the spare substrate obtained in step 1 in the precursor solution obtained in step 2 for 4 to 8 hours, and use a rotary evaporator to vacuum distill off excess ethanol solution solution, the conditions are: heating to a temperature of 40 to 50 °C in a water bath, and the...

Embodiment 1

[0044] The present embodiment is the nanoparticle activated carbon of loading CoCr(Mn / Al)FeNi high entropy alloy for methylene blue (C 16 h 18 CN 3 S·3H 2 O) Catalytic degradation of azo dye solution using nanoparticle activated carbon loaded with CoCrMnFeNi or CoCrAlFeNi high-entropy alloys.

[0045] Among them, the composition of the CoCrMnFeNi high-entropy alloy is shown in Table 1 below:

[0046] Table 1

[0047]

[0048] In the above three groups of nanoparticle activated carbon loaded with CoCrMnFeNi high-entropy alloy, the mass content of activated carbon is 90wt%, 95wt%, and 97wt%, respectively.

[0049] Among them, the composition of the CoCrAlFeNi high-entropy alloy is shown in Table 2 below:

[0050] Table 2

[0051]

[0052] In the above three groups of nano-particle activated carbon loaded with CoCrAlFeNi high-entropy alloy, the mass content of activated carbon is 90wt%, 95wt%, and 97wt%, respectively.

[0053] Choose activated carbon particles with m...

Embodiment 2

[0060] The present embodiment is the nanoparticle phosphate ceramics of the load CoCr (Mn / Al) FeNi high entropy alloy for methylene blue (C 16 h 18 CN 3 S·3H 2 O) catalytic degradation of the solution, in the nano-particle phosphate ceramics loaded with CoCrMnFeNi or CoCrAlFeNi high-entropy alloys, the mass content of the phosphate ceramics is 90wt%.

[0061] Among them, the composition of the CoCrMnFeNi high-entropy alloy is shown in Table 3 below:

[0062] table 3

[0063]

[0064] Among them, the composition of the CoCrAlFeNi high-entropy alloy is shown in Table 4 below:

[0065] Table 4

[0066]

[0067] Phosphate ceramics are a new type of structural and functional ceramic materials with a three-dimensional network structure but different compositions. The spatial structure of tetrahedral crystals and octahedrons with common vertices has the potential to be developed as a carrier material.

[0068] Weigh 3g of phosphate ceramic powder and wash the excess ash w...

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Abstract

The invention discloses a nanoparticle catalyst loaded with CoCr(Mn / Al)FeNi high-entropy alloy and its preparation method and application. The catalyst uses activated carbon or mineral material as a matrix, and the surface of the matrix is ​​loaded with CoCr(Mn / Al)FeNi The high-entropy alloy nanoparticles, wherein the mass content of the catalyst is 90-97wt%. The CoCr(Mn / Al)FeNi high-entropy alloy nanoparticles loaded on the carrier are evenly distributed, the loading capacity is controllable, and the catalytic performance is excellent. The high-entropy alloy particles and the matrix form a galvanic effect on the nanoscale, which makes the catalytic degradation of azo dyes performance has been greatly improved.

Description

technical field [0001] The invention relates to a nanoparticle catalyst loaded with CoCr(Mn / Al)FeNi high-entropy alloy, a preparation method and application thereof, and belongs to the field of degradation treatment of printing and dyeing sewage containing azo dyes. Background technique [0002] Azo dyes are widely used in the industrial field, but because the aromatic hydrocarbons and heterocyclic macromolecular compounds are difficult to degrade under natural conditions and cause water pollution, how to continuously and efficiently degrade the double bond structure of mineralized azo dyes ( -N=N- and -N=O-) remain a formidable challenge. [0003] In recent years, there are many methods for purifying sewage. The physical process includes membrane separation and activated carbon adsorption technology, the use of bacterial biodegradation, zero-valent iron, photocatalysis, ozone and Fenton reaction and other chemical methods. In homogeneous catalysis, the solute substance as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J37/34B01J37/02B01J37/08B01J37/10B82Y30/00B82Y40/00C02F1/72C02F101/38
CPCB01J23/8892B01J37/0201B01J37/082B01J37/10B01J37/343C02F1/725C02F2101/308C02F2101/38
Inventor 陈正刘雨雨杨小芹沈承金陶庆张平张金勇樊宇
Owner CHINA UNIV OF MINING & TECH
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