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CN-122006714-A - Copper-iron heterogeneous material and preparation method and application thereof

CN122006714ACN 122006714 ACN122006714 ACN 122006714ACN-122006714-A

Abstract

The invention discloses a copper-iron heterogeneous material, a preparation method and application thereof, and belongs to the technical field of micro-nano material processing. The preparation method of the copper-iron heterogeneous material comprises the following steps of carrying out dealloying reaction on a precursor alloy sheet and alkali liquor, wherein the precursor alloy sheet comprises Cu, al and Fe, the dealloying reaction comprises a first-stage reaction and a second-stage reaction which are sequentially carried out, the temperature of the first-stage reaction is 25-30 ℃, and the temperature of the second-stage reaction is 60-90 ℃. The preparation method provided by the invention can effectively improve the activity of the obtained product as a peroxymonosulfate catalyst, and has lower cost. The invention also provides the copper-iron heterogeneous material prepared by the preparation method and application thereof.

Inventors

  • LIANG PING
  • WANG JIE
  • ZHANG CHI
  • ZHU JINGYU
  • LI SHUFEN

Assignees

  • 五邑大学

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The preparation method of the copper-iron heterogeneous material is characterized by comprising the following steps of: dealloying the precursor alloy sheet and alkali liquor; the precursor alloy sheet comprises Cu, al and Fe; The dealloying reaction comprises a first-stage reaction and a second-stage reaction which are sequentially carried out; The temperature of the first-stage reaction is 25-30 ℃, and the temperature of the second-stage reaction is 60-90 ℃.
  2. 2. The method according to claim 1, wherein the precursor alloy sheet has an Al content of 85 to 90 atomic%, and/or, The precursor alloy sheet comprises the following components in atom percent: Cu9~14%; Al85~90%; Fe1~3%。
  3. 3. the method of claim 1, wherein the precursor alloy sheet has a thickness of 0.2 to 0.5mm.
  4. 4. The method according to claim 1, wherein the concentration of the alkali solution is 3-6 mol/L, and/or the solute of the alkali solution comprises at least one of sodium hydroxide and potassium hydroxide.
  5. 5. The preparation method according to claim 1, wherein the duration of the first-stage reaction is 2-4 hours, and/or the duration of the second-stage reaction is 2-4 hours.
  6. 6. The method according to any one of claims 1 to 5, further comprising washing, drying and grinding after the dealloying reaction.
  7. 7. A copper-iron dissimilar material prepared by the preparation method according to any one of claims 1 to 6, wherein the copper-iron dissimilar material has a multi-stage nano-pore structure.
  8. 8. Use of the copper-iron dissimilar material according to claim 7 in the fields of photocatalysis and electrochemical sensing.
  9. 9. A catalyst, wherein the raw materials for preparing the catalyst comprise the copper-iron heterogeneous material according to claim 7 or the copper-iron heterogeneous material prepared by the preparation method according to any one of claims 1 to 6.
  10. 10. Use of the catalyst of claim 9 in advanced oxidation technology.

Description

Copper-iron heterogeneous material and preparation method and application thereof Technical Field The invention relates to the technical field of micro-nano material processing, in particular to a copper-iron heterogeneous material and a preparation method and application thereof. Background In recent years, the problem of continuous detection and accumulation of antibiotic pollutants in water has raised widespread attention as an ecotoxicity and potential health risk. Such contaminants are difficult to naturally degrade in aqueous environments, which makes their efficient and deep removal an important and difficult point in the field of water pollution remediation. Compared with the traditional oxidation technology, the advanced oxidation technology (AOPs) commonly adopted for treating the organic wastewater at home and abroad has the advantages of high oxidability, high reaction rate, high biodegradability and the like. Advanced oxidation processes based on Peroxomonosulphate (PMS) show great potential in degrading refractory organic pollutants including antibiotics, because they can generate very active sulphate radicals (SO 4•－). The practical effect of this technique is highly dependent on the ability of the catalyst to activate PMS. Therefore, the development of a novel catalyst with high activity and low cost becomes a core difficult problem for promoting the engineering application of the technology. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a preparation method of the copper-iron heterogeneous material, which can effectively improve the activity of the copper-iron heterogeneous material serving as a peroxymonosulfate catalyst and has lower cost. The invention also provides the copper-iron heterogeneous material prepared by the preparation method. The invention also provides application of the copper-iron heterogeneous material. According to an embodiment of the first aspect of the present invention, there is provided a method for preparing a copper-iron heterogeneous material, the method comprising the steps of: dealloying the precursor alloy sheet and alkali liquor; the precursor alloy sheet comprises Cu, al and Fe; The dealloying reaction comprises a first-stage reaction and a second-stage reaction which are sequentially carried out; The temperature of the first-stage reaction is 25-30 ℃, and the temperature of the second-stage reaction is 60-90 ℃. The preparation method provided by the embodiment of the invention has at least the following beneficial effects: Copper-iron materials prepared by the traditional technology are mostly discrete nano particles and are mostly in an oxide state. The invention controls the components of the precursor alloy sheet and the dealloying reaction (aluminum removal) process to ensure that the pore canal has grading characteristics and contains micro pore canal, nano pore canal and ligament structure (equivalent to pore wall), thus forming a unique three-dimensional continuous ligament-pore canal nano porous structure (multi-stage nano pore structure+ligament structure). Due to the structure, when the copper-iron heterogeneous material prepared by the preparation method is used as a catalyst, PMS can be effectively activated, generation of active species is obviously promoted, and efficient degradation of organic pollutants is realized. According to some embodiments of the invention, the method for obtaining the precursor alloy sheet comprises the following steps: S1, smelting a mixture of copper, iron and aluminum; s2, cutting the product obtained in the step S1 by adopting a linear cutting method. Compared with the traditional melt spinning method, the acquisition method has the following advantages: The method adopts a melting and linear cutting method to obtain the precursor alloy sheet, can effectively retain alloy components in the precursor alloy sheet, and is convenient for obtaining the multistage nano-pore structure subsequently. According to some embodiments of the invention, in step S1, the purity of copper is 99.5-99.99at%. According to some embodiments of the invention, in step S1, the purity of the iron is 99.6-99.99at%. According to some embodiments of the invention, in step S1, the purity of the aluminum is 99.7 to 99.99at%. According to some embodiments of the invention, in step S1, the method further comprises pre-treating the copper, iron, and aluminum before smelting. Wherein the pretreatment includes at least one of oxide layer removal, cleaning, and vacuum drying. According to some embodiments of the invention, in step S1, the smelting method is vacuum arc smelting. If necessary, the protective smelting can be performed by using an inert atmosphere such as argon. According to some embodiments of the invention, in step S1, the smelting is performed 3 to 10 times. For example, the number of times may be 3, 5, 6, 8 or 10. Thereb