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High-entropy alloy for sewage degradation and preparing method thereof

A high-entropy alloy and sewage technology, applied in the field of high-entropy alloy, can solve the problems of low efficiency and limit the application of high-entropy alloy, and achieve the effects of improving efficiency, strong operability and low preparation cost

Active Publication Date: 2015-11-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing high-entropy alloy systems do not contain or contain a small amount of active metal elements, which makes the efficiency of existing high-entropy alloys for sewage degradation not high, which severely limits the application of high-entropy alloys in sewage treatment.

Method used

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  • High-entropy alloy for sewage degradation and preparing method thereof
  • High-entropy alloy for sewage degradation and preparing method thereof
  • High-entropy alloy for sewage degradation and preparing method thereof

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Effect test

preparation example Construction

[0029] The preparation method provided by the invention has the following steps:

[0030]Dosing according to any one of the high-entropy alloy components in the specific examples, directly using the method of (ball milling) mechanical alloying, wherein the ball milling is carried out under the protection of argon, the high-entropy alloy for degrading sewage can be obtained. alloy. Among them, the purity of metal element raw material powder is higher than 99%, and the particle size is 200-325 mesh. The ball-to-material ratio in the ball milling process was 15:1, n-heptane was used as the process control agent, and the ball milling speed was 300 rpm. The relevant operations of the ball milling tank were all carried out in a glove box, and the glove box was an atmosphere of argon at atmospheric pressure.

[0031] The practical effects of the present invention will be further described below in conjunction with specific examples.

Embodiment 1

[0033] Preparation of high entropy alloy powder Co 20 Ti 20 Cr 20 al 20 Zn 20

[0034] The metal element powder raw materials (Cr, Co, Ti, Zn, Al) with a purity greater than 99% are compounded according to the equiatomic ratio, and then put into the ball mill tank together with the ball mill medium, and 1%wt process control agent is added. The ball mill tank and ball mill medium are made of stainless steel, the process control agent is n-heptane, and the ball-to-material ratio is 15:1.

[0035] An all-round planetary ball mill is adopted, and the ball milling speed is 300rpm. The powder was taken for observation every 5 hours, and each time the can was opened to take the powder, it was carried out in a glove box, and the glove box was an argon environment at an atmospheric pressure.

[0036] Generally, Co can be obtained by ball milling for about 60 hours. 20 Ti 20 Cr 20 al 20 Zn 20 High-entropy alloy powder, the powder particle size is generally 0.6-10μm. Depend o...

Embodiment 2

[0040] Preparation of high entropy alloy powder Co 20 Ni 20 Ti 20 al 20 Zn 20

[0041] The metal element powder raw materials (Co, Ni, Ti, Zn, Al) with a purity greater than 99% are compounded according to the equiatomic ratio, and then put into the ball mill tank together with the ball mill medium, and 1%wt process control agent is added. The ball mill tank and ball mill medium are made of stainless steel, the process control agent is n-heptane, and the ball-to-material ratio is 15:1.

[0042] An all-round planetary ball mill is adopted, and the ball milling speed is 300rpm. The powder was taken for observation every 5 hours, and each time the can was opened to take the powder, it was carried out in a glove box, and the glove box was an argon environment at an atmospheric pressure.

[0043] Generally, Co can be obtained by ball milling for about 90 hours. 20 Ni 20 Ti 20 al 20 Zn 20 High-entropy alloy powder, the powder particle size is generally 0.6-10μm. Depend o...

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Abstract

The invention discloses high-entropy alloy for sewage degradation and a preparing method thereof. The high-entropy alloy at least comprises four components and at least comprises one active metallic element which is Mg, Ca or Zn, and the components are matched based on an equi-atomic ratio or approximate-equi-atomic ratio. The high-entropy alloy is prepared through mechanical alloying. The technology is simple, smelting is not needed, and preparing cost is low. The high-entropy alloy is different from ordinary high-entropy alloy systems in that a dinitrogen bond is broken through redox reaction between the active zero-valent metallic element and the -N=N- perssad in organic synthetic dyestuff, so that a high rate is realized for azo dyestuff and a remarkable effect is realized for degradation of materials similar to organic synthetic dyestuff, and degradation efficiency is improved by over 250 times compared with commercial iron powder which is in common use currently. The composition range of the high-entropy alloy is wide, and appropriate composition adjustment can be conducted according to actual needs. Meanwhile, the high-entropy alloy is high in structural stability and suitable for various working environments and has broad industrial application prospects in sewage treatment.

Description

technical field [0001] The invention belongs to the field of high-entropy alloys, and in particular relates to a high-entropy alloy used for sewage degradation and a preparation method thereof. Background technique [0002] Organic synthetic dyes are widely used in textile, paper printing, leather, paint, plastic, and cosmetic industries. Organic synthetic dyes can be divided into nitro dyes, azo dyes, indigo dyes and aromatic methane dyes according to their functional groups. [0003] Among them, azo dyes are the most widely used synthetic dyes in the printing and dyeing process of textiles and clothing. They are used for dyeing and printing of various natural and synthetic fibers, and are also used for coloring of paints, plastics, rubber, etc., because they contain stable Azo group (-N=N-) named after. According to the survey, about 12% of the dyes flow into the wastewater every year. If the wastewater is not properly treated, the wastewater will flow into rivers, lakes...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C30/02C22C30/06C22C1/04C02F1/00
Inventor 刘雄军吕宗阳王辉贾蓓吴渊吕昭平
Owner UNIV OF SCI & TECH BEIJING
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