Preparation method of bimetallic-based carbon material as well as product and application of bimetallic-based carbon material

Abstract

The invention discloses a preparation method of a bimetallic-based carbon material as well as a product and application of the bimetallic-based carbon material, and belongs to the technical field of chemistry. Comprising the following steps: mixing a metal stock solution and a carbon material precursor solution to obtain a mixed solution; the mixed solution is subjected to a heating reaction, cooling, washing, centrifuging, drying and calcining, and the bimetallic-based carbon material is obtained; wherein metals in the metal stock solution are selected from any two of an iron source, a molybdenum source, a cobalt source, a nickel source, a zinc source and a copper source. Under the action of the bimetallic active sites, the action among the pollutants, the oxidant and the catalyst is promoted, and the generation of active oxygen species on the surface and interface of the catalyst in a reaction system is improved, so that the influence of an actual water matrix and the pH value is overcome, and the effective removal of the organic pollutants in the wastewater in a wide pH value range is realized.

Description

Technical Field

[0001] The present invention belongs to the field of chemical technology, and in particular relates to a preparation method of a bimetallic carbon material and a product and application thereof. Background Art

[0002] The (quasi) Fenton oxidation process has attracted much attention in the field of wastewater treatment because it can generate active oxygen species with strong oxidizing properties. However, it should be noted that the process of free radicals transferring from the catalyst surface to the vicinity of the target pollutant for oxidative degradation is easily interfered by the complex water matrix and pH environment, so the actual utilization efficiency of free radicals is low. The anti-interference ability will determine the economy and feasibility of (quasi) Fenton oxidation technology in practical applications. Therefore, it is urgent to prepare a bimetallic carbon material with high activity and high stability. Summary of the invention

[0003] In view of the above technical problems, the present invention proposes a preparation method of a bimetallic carbon material, a product and an application thereof. The material can be used to improve the anti-interference ability and stability of the catalyst, promote the utilization efficiency of active oxygen species in the Fenton reaction, and thus improve the mineralization rate of actual wastewater.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] One of the objects of the present invention is to provide a method for preparing a bimetallic carbon material, comprising the following steps: mixing a metal stock solution with a carbon material precursor solution to obtain a mixed solution; heating the mixed solution for reaction, cooling, washing, centrifuging, drying, and calcining to obtain a bimetallic carbon material; wherein the metal in the metal stock solution is selected from any two of an iron source, a molybdenum source, a cobalt source, a nickel source, a zinc source, and a copper source.

[0006] The high-activity and high-stability bimetallic-based carbon material constructed by the present invention is used to efficiently remove organic pollutants through the combination of bimetallic active sites.

[0007] Furthermore, the specific preparation steps of the carbon material precursor solution include: adding a carbon source into water, and ultrasonically treating the water to obtain the carbon material precursor solution.

[0008] Furthermore, the carbon source is one or more of melamine, urea, o-phenanthroline and dicyandiamide.

[0009] Furthermore, the usage ratio of the carbon source to water is (1-15) g:100 mL.

[0010] Furthermore, the heating reaction conditions are: reacting at 60° C. for 2-24 hours.

[0011] Furthermore, the calcination conditions are: reacting at 400-1000° C. for 2-24 hours.

[0012] Further, the iron source is ferric chloride, ferric acetylacetonate, ferric nitrate, ferric oxide, ferrosoferric oxide, iron powder or ferric sulfate; and / or

[0013] The molybdenum source is ammonium molybdate, sodium molybdate, molybdenum trioxide, molybdenum dioxide or molybdenum powder; and / or

[0014] The cobalt source is cobalt chloride, cobalt nitrate, cobalt acetylacetonate or cobalt acetate; and / or

[0015] The zinc source is zinc oxide, zinc sulfate, zinc acetate, zinc chloride or zinc nitrate; and / or

[0016] The nickel source is nickel chloride, nickel nitrate or nickel acetate; and / or

[0017] The copper source is copper oxide, copper chloride, copper nitrate or copper sulfate.

[0018] The second object of the present invention is to provide a bimetallic carbon material prepared by the above preparation method.

[0019] A third object of the present invention is to provide an application of a bimetallic carbon material in treating organic pollutants in wastewater.

[0020] The fourth object of the present invention is to provide a method for treating organic pollutants in wastewater, comprising the following steps: putting the bimetallic carbon material into wastewater containing organic pollutants, adding an oxidant, stirring, and removing the organic matter; wherein,

[0021] The organic pollutants are one or more of hydroquinone, aniline, phenol, 4-chlorophenol, p-hydroxybenzaldehyde, p-hydroxybenzoic acid and p-nitrophenol;

[0022] The concentration of the organic pollutants in the wastewater is 1-2000 mg / L;

[0023] The oxidant is potassium permonosulfate, and the addition amount is 300 mg / L;

[0024] The input amount of the bimetallic carbon material is 150 mg / L.

[0025] The strong interaction between the bimetallic active sites and pollutants and oxidants can effectively adsorb pollutants to the catalyst surface, thereby ensuring that the generated active oxygen species can be efficiently utilized, thereby overcoming the pH limitation and achieving effective removal of organic pollutants in wastewater over a wide pH range. In addition, through the bimetallic sites, the effective circulation of metal ion valence states is achieved, reducing the addition of oxidants and reducing the cost of practical applications.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] 1. The present invention promotes the interaction between pollutants, oxidants and catalysts through the action of bimetallic active sites, increases the generation of active oxygen species on the catalyst surface in the reaction system, and thus overcomes the influence of actual water matrix and pH value, and realizes the effective removal of organic pollutants in wastewater under a wide pH range;

[0028] 2. Through the dual metal sites, the effective circulation of Fe and Mo ion valence states is achieved, the addition of oxidants is reduced, and the cost of practical applications is reduced;

[0029] 3. The catalyst added to this system can effectively degrade the chemical oxygen demand during the preparation process, and fully comply with emission standards to prevent secondary pollution.

[0030] 4. The material prepared by the present invention has a removal rate of nearly 100% for phenol within 10 minutes under the condition of pH = 3-11. The present invention provides a method for constructing a highly active and highly stable bimetallic carbon material for removing organic pollutants, which has a high degradation activity for the degradation of organic pollutants under acidic, neutral and alkaline conditions, and provides the possibility for the treatment of actual wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 This is a comparison chart of the products prepared in Example 1 and Comparative Examples 1-2 and the degradation effect of melamine on phenol;

[0033] Figure 2 This is a comparison chart of the degradation effects of the products prepared in Example 1 and Comparative Example 3 on phenol in wastewater with different pH values;

[0034] Figure 3 This is a comparison chart of the degradation effects of the product prepared in Example 1 on different organic matter in wastewater;

[0035] Figure 4 It is a comparison chart of the products prepared in Example 1 and Comparative Examples 1-2 and the mineralization effect of melamine on phenol. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0037] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0038] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0039] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0040] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0041] The present invention provides a method for preparing a bimetallic carbon material, comprising the following steps:

[0042] (1) preparing a carbon material precursor solution;

[0043] (2) mixing the metal stock solution and the carbon material precursor solution, stirring, and obtaining a mixed solution;

[0044] (3) heating the mixed solution for reaction, cooling after the reaction is completed, washing, centrifuging, and drying to obtain a metal-carbon material precursor;

[0045] (4) The metal-carbon material precursor is first transferred into a porcelain ark, and then placed in a muffle furnace for calcination to obtain a bimetallic carbon material.

[0046] In some embodiments, in step (1), the specific preparation steps of the carbon material precursor solution include: adding a carbon source into water, and ultrasonically treating the water to obtain a carbon material precursor solution.

[0047] The carbon source is one or more of melamine, urea, o-phenanthroline and dicyandiamide. In the following preferred embodiments of the present invention, the carbon source can be selected from melamine, urea, o-phenanthroline or dicyandiamide.

[0048] The ratio of the carbon source to water is (1-15) g: 100 mL. In the following preferred embodiments of the present invention, the ratio of the carbon source to water can be selected as 5 g: 100 mL.

[0049] The ultrasonic treatment time is 1-120 min. In the following preferred embodiments of the present invention, the ultrasonic treatment time can be selected to be 120 min.

[0050] In some embodiments, in step (2), the metal in the metal stock solution is selected from any two of an iron source, a molybdenum source, a cobalt source, a nickel source, a zinc source, and a copper source. In the following preferred embodiments of the present invention, the metal in the metal stock solution can be selected from one of an iron source and a molybdenum source, an iron source and a cobalt source, an iron source and a nickel source, and an iron source and a copper source. When selecting a combination of two metals, the mass ratio of any two metals is 1:1.

[0051] The mass ratio of each metal to the carbon material precursor solution is 0.1:1.

[0052] The iron source is ferric chloride, ferric acetylacetonate, ferric nitrate, ferric oxide, ferroferric oxide, iron powder or ferric sulfate. In the following preferred embodiments of the present invention, the iron source can be ferric chloride.

[0053] The molybdenum source is ammonium molybdate, sodium molybdate, molybdenum trioxide, molybdenum dioxide or molybdenum powder. In the following preferred embodiments of the present invention, the molybdenum source can be molybdenum dioxide.

[0054] The cobalt source is cobalt chloride, cobalt nitrate, cobalt acetylacetonate or cobalt acetate. In the following preferred embodiments of the present invention, the cobalt source can be cobalt chloride.

[0055] The zinc source is zinc oxide, zinc sulfate, zinc acetate, zinc chloride or zinc nitrate.

[0056] The nickel source is nickel chloride, nickel nitrate or nickel acetate. In the following preferred embodiments of the present invention, the nickel source can be nickel chloride.

[0057] The copper source is copper oxide, copper chloride, copper nitrate or copper sulfate. In the following preferred embodiments of the present invention, the copper source can be copper chloride.

[0058] In some embodiments, in step (3), the heating reaction is carried out at 60° C. for 2-24 hours. In the following preferred embodiments of the present invention, the heating can be carried out at 60° C. for 10 hours.

[0059] In some embodiments, in step (3), the washing is performed with ultrapure water and ethanol, and the number of washing times is 1-100. In the following preferred embodiments of the present invention, the washing can be performed 10 times.

[0060] In some embodiments, in step (4), the calcination condition is: reacting at 200-1000° C. for 2-24 hours. In the following preferred embodiments of the present invention, the calcination can be carried out at 1000° C. for 2 hours.

[0061] The bimetallic carbon material can also be prepared using the above preparation method.

[0062] Application of the bimetallic carbon material in treating organic pollutants in wastewater.

[0063] A method for treating organic pollutants in wastewater, comprising the following steps: putting the bimetallic carbon material into wastewater containing organic pollutants, adding an oxidant, stirring, and removing the organic matter; wherein:

[0064] The organic pollutants are one or more of hydroquinone, aniline, phenol, 4-chlorophenol, p-hydroxybenzaldehyde, p-hydroxybenzoic acid and p-nitrophenol;

[0065] The concentration of the organic pollutants in the wastewater is 1-2000 mg / L; illustratively, in the following preferred embodiments of the present invention, the concentration of the organic pollutants in the wastewater can be selected to be 20 mg / L.

[0066] The oxidant is potassium permonosulfate, and the added amount is 300 mg / L.

[0067] The input amount of the bimetallic carbon material is 150 mg / L.

[0068] The raw materials used in the present invention are all purchased from the market.

[0069] The technical solution of the present invention is further illustrated by the following embodiments.

[0070] Example 1

[0071] A method for preparing a bimetallic carbon material comprises the following steps:

[0072] (1) Preparing a carbon material precursor solution: adding 5 g of melamine into a beaker containing 100 mL of water and treating the mixture with ultrasound for 2 h to obtain a melamine precursor solution;

[0073] (2) Add 500 mg of ferric chloride and 500 mg of molybdenum dioxide to a beaker containing 100 mL of water, stir for 2 h, then add 5 g of melamine precursor solution, stir for 10 h, and obtain a mixed solution;

[0074] (3) reacting the mixed solution at 60° C. for 10 h, cooling after the reaction, washing with ultrapure water and ethanol 10 times, centrifuging, and drying to obtain a Fe / Mo-melamine precursor;

[0075] (4) The Fe / Mo-melamine precursor is first transferred into a porcelain ark, and then placed in a muffle furnace and calcined at 1000° C. for 2 h to obtain a Fe / Mo-melamine material.

[0076] Example 2

[0077] A method for preparing a bimetallic carbon material comprises the following steps:

[0078] (1) Preparation of carbon material precursor solution: 5 g of urea was added to a beaker containing 100 mL of water and treated with ultrasound for 2 h to obtain a urea precursor solution;

[0079] (2) Add 500 mg of ferric chloride and 500 mg of cobalt chloride to a beaker containing 100 mL of water, stir for 2 h, then add 5 g of urea precursor solution, stir for 10 h, and obtain a mixed solution;

[0080] (3) reacting the mixed solution at 60° C. for 10 h, cooling after the reaction, washing with ultrapure water and ethanol 10 times, centrifuging, and drying to obtain a Fe / Co-urea precursor;

[0081] (4) The Fe / Co-urea precursor was first transferred into a porcelain ark, and then placed in a muffle furnace and calcined at 1000° C. for 2 h to obtain a Fe / Co-urea material.

[0082] Example 3

[0083] A method for preparing a bimetallic carbon material comprises the following steps:

[0084] (1) Preparing a carbon material precursor solution: adding 5 g of dicyandiamide into a beaker containing 100 mL of water and treating with ultrasound for 2 h to obtain a dicyandiamide precursor solution;

[0085] (2) Add 500 mg of ferric chloride and 500 mg of nickel chloride to a beaker containing 100 mL of water, stir for 2 h, then add 5 g of dicyandiamide precursor solution, stir for 10 h, and obtain a mixed solution;

[0086] (3) reacting the mixed solution at 60° C. for 10 h, cooling after the reaction, washing with ultrapure water and ethanol 10 times, centrifuging, and drying to obtain a Fe / Ni-dicyandiamide precursor;

[0087] (4) The Fe / Ni-dicyandiamide precursor is first transferred into a porcelain ark, and then placed in a muffle furnace and calcined at 1000° C. for 2 h to obtain a Fe / Ni-dicyandiamide material.

[0088] Example 4

[0089] A method for preparing a bimetallic carbon material comprises the following steps:

[0090] (1) Preparing a carbon material precursor solution: adding 5 g of o-phenanthroline into a beaker containing 100 mL of water and treating with ultrasound for 2 h to obtain an o-phenanthroline precursor solution;

[0091] (2) 500 mg of ferric chloride and 500 mg of cupric chloride were added to a beaker containing 100 mL of water, stirred for 2 h, and then 5 g of o-phenanthroline precursor solution was added and stirred for 10 h to obtain a mixed solution;

[0092] (3) reacting the mixed solution at 60° C. for 10 h, cooling after the reaction, washing with ultrapure water and ethanol 10 times, centrifuging, and drying to obtain a Fe / Cu-o-phenanthroline precursor;

[0093] (4) The Fe / Cu-dicyandiamide precursor is first transferred into a porcelain ark, and then placed in a muffle furnace and calcined at 1000° C. for 2 h to obtain a Fe / Cu-o-phenanthroline material.

[0094] Comparative Example 1

[0095] A method for preparing a metal-based carbon material comprises the following steps:

[0096] (1) Preparing a carbon material precursor solution: adding 5 g of melamine into a beaker containing 100 mL of water and treating the mixture with ultrasound for 2 h to obtain a melamine precursor solution;

[0097] (2) adding 500 mg of ferric chloride into a beaker containing 100 mL of water, stirring for 2 h, then adding 5 g of melamine precursor solution, stirring for 10 h, to obtain a mixed solution;

[0098] (3) reacting the mixed solution at 60° C. for 10 h, cooling after the reaction, washing with ultrapure water and ethanol 10 times, centrifuging, and drying to obtain an Fe-melamine precursor;

[0099] (4) The Fe-melamine precursor is first transferred into a porcelain ark, and then placed in a muffle furnace and calcined at 1000° C. for 2 h to obtain a Fe-melamine material.

[0100] Comparative Example 2

[0101] A method for preparing a metal-based carbon material comprises the following steps:

[0102] (1) Preparing a carbon material precursor solution: adding 5 g of melamine into a beaker containing 100 mL of water and treating the mixture with ultrasound for 2 h to obtain a melamine precursor solution;

[0103] (2) adding 500 mg of molybdenum dioxide into a beaker containing 100 mL of water, stirring for 2 h, then adding 5 g of melamine precursor solution, stirring for 10 h, to obtain a mixed solution;

[0104] (3) reacting the mixed solution at 60° C. for 10 h, cooling after the reaction, washing with ultrapure water and ethanol 10 times, centrifuging, and drying to obtain a Mo-melamine precursor;

[0105] (4) The Mo-melamine precursor is first transferred into a porcelain ark, and then placed in a muffle furnace and calcined at 1000° C. for 2 h to obtain a Mo-melamine material.

[0106] Comparative Example 3

[0107] The traditional homogeneous Fenton reaction includes the following steps:

[0108] A certain amount of ferrous sulfate is weighed and dissolved in water to obtain a ferrous ion solution with a concentration of 500 mg / L. This solution is the catalyst required for the traditional homogeneous reaction, and the catalyst is named: traditional Fenton Fe catalyst.

[0109] Application Example 1

[0110] The products prepared in Example 1 and Comparative Examples 1-2 and melamine were used as catalysts for a degradation experiment, which specifically included the following steps: 100 mL of wastewater to be treated, wherein the concentration of phenol was 20 mg / L, the amount of catalyst added was 15 mg, 30 mg of potassium permonosulfate was added to initiate the reaction, and the mixture was stirred.

[0111] Figure 1 The products prepared in Example 1 and Comparative Examples 1-2 and the degradation effect of melamine on phenol are compared. The experiment shows that the prepared high-activity and high-stability Fe / Mo-melamine carbon material has the highest efficiency in degrading phenol compared with other catalysts, and the degradation rate of phenol can reach 90% within 1 minute. The degradation effects of melamine, Fe-melamine and Mo-melamine on phenol are all less than 20%. This result shows that the Fe / Mo bimetallic synergy can make the carbon material catalyst have higher activity, indicating the importance of bimetallic synergy.

[0112] Application Example 2

[0113] The product obtained in Example 1 was used as a catalyst for a degradation experiment, which specifically included the following steps: 100 mL of wastewater to be treated, wherein the concentration of phenol was 20 mg / L, 15 mg of catalyst was added, 30 mg of potassium permonosulfate was added to initiate the reaction, and the mixture was stirred.

[0114] The product obtained in Comparative Example 3 was used as a catalyst for a degradation experiment, which specifically included the following steps: 100 mL of wastewater to be treated was taken, wherein the concentration of phenol was 20 mg / L, and the amount of catalyst added was 1 mL, i.e., Fe 2+ The concentration is 5 mg / L, add 100 mg / L hydrogen peroxide (H2O2) to initiate the reaction and stir.

[0115] Different experimental groups were set up, the difference being that the initial pH values ​​of the wastewater were different, namely: pH=2, pH=3, pH=4, pH=5.5, pH=6.86, pH=7, pH=9, pH=11, and pH=12.

[0116] Figure 2 The following is a comparison chart of the degradation effects of the products prepared in Example 1 and Comparative Example 3 on phenol in wastewater with different pH values. The experiment shows that the prepared high-activity and high-stability Fe / Mo-melamine has a reduced dependence on pH, overcoming the pH limitation of the traditional homogeneous Fenton reaction, and achieves efficient degradation of phenol in the range of pH = 2-12, with a removal rate of nearly 100% within 10 minutes.

[0117] Application Example 3

[0118] The product prepared in Example 1 was used as a catalyst for a degradation experiment, which specifically included the following steps: 100 mL of wastewater to be treated, in which the concentration of organic matter was 20 mg / L, 15 mg of catalyst was added, 30 mg of potassium permonosulfate was added to initiate the reaction, and stirred.

[0119] The organic substances are respectively set as: hydroquinone, aniline, phenol, 4-chlorophenol, p-hydroxybenzaldehyde, p-hydroxybenzoic acid, and p-nitrophenol.

[0120] Figure 3 This is a comparison chart of the degradation effects of the product prepared in Example 1 on different organic matter in wastewater. The experiment shows that the prepared high-activity and high-stability Fe / Mo-melamine exhibits excellent activity against different pollutants, indicating the universality of the material prepared by the present invention against various pollutants and the feasibility of practical application.

[0121] Application Example 4

[0122] The products prepared in Example 1 and Comparative Examples 1-2 and melamine were used as catalysts for a mineralization experiment, which specifically included the following steps: 100 mL of wastewater to be treated, in which the concentration of phenol was 20 mg / L, the amount of catalyst added was 15 mg, 30 mg of potassium permonosulfate was added to initiate the reaction, and the mixture was stirred.

[0123] Figure 4 The comparison diagram of the products prepared in Example 1, Comparative Examples 1-2, and the mineralization effect of melamine on phenol shows that the high-activity and high-stability Fe / Mo-melamine carbon material prepared in Example 1 has the highest mineralization rate for phenol compared with other catalysts, which can reach 72.3% within 10 minutes. The mineralization effects of melamine, Fe-melamine, and Mo-melamine on phenol are all less than 10%. This result shows that the Fe / Mo bimetallic synergy can improve the mineralization rate of actual wastewater, indicating the importance of bimetallic synergy.

[0124] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preparing a bimetallic carbon material, characterized in that: The following steps are involved: Mixing a metal stock solution with a carbon material precursor solution to obtain a mixed solution; heating the mixed solution for reaction, cooling, washing, centrifuging, drying, and calcining to obtain a bimetallic carbon material; The metal in the metal stock solution is selected from any two of an iron source, a molybdenum source, a cobalt source, a nickel source, a zinc source and a copper source.

2. The method for preparing a bimetallic carbon material according to claim 1, characterized in that: The specific preparation steps of the carbon material precursor solution include: adding a carbon source into water, and ultrasonically treating the water to obtain the carbon material precursor solution.

3. The method for preparing a bimetallic carbon material according to claim 2, characterized in that: The carbon source is one or more of melamine, urea, o-phenanthroline and dicyandiamide.

4. The method for preparing a bimetallic carbon material according to claim 2, characterized in that: The usage ratio of the carbon source to water is (1-15) g:100 mL.

5. The method for preparing a bimetallic carbon material according to claim 1, characterized in that: The heating reaction conditions are: reacting at 60° C. for 2-24 hours.

6. The method for preparing a bimetallic carbon material according to claim 1, characterized in that: The calcination conditions are: reacting at 400-1000° C. for 2-24 hours.

7. The method for preparing a bimetallic carbon material according to claim 1, characterized in that: The iron source is ferric chloride, ferric acetylacetonate, ferric nitrate, ferric oxide, ferrosoferric oxide, iron powder or ferric sulfate; and / or The molybdenum source is ammonium molybdate, sodium molybdate, molybdenum trioxide, molybdenum dioxide or molybdenum powder; and / or The cobalt source is cobalt chloride, cobalt nitrate, cobalt acetylacetonate or cobalt acetate; and / or The zinc source is zinc oxide, zinc sulfate, zinc acetate, zinc chloride or zinc nitrate; and / or The nickel source is nickel chloride, nickel nitrate or nickel acetate; and / or The copper source is copper oxide, copper chloride, copper nitrate or copper sulfate.

8. A bimetallic carbon material prepared according to the preparation method according to any one of claims 1 to 7.

9. Use of the bimetallic carbon material as claimed in claim 8 in treating organic pollutants in wastewater.

10. A method for treating organic pollutants in wastewater, characterized in that: The method comprises the following steps: putting the bimetallic carbon material according to claim 8 into wastewater containing organic pollutants, adding an oxidant, stirring, and removing organic matter; wherein, The organic pollutants are one or more of hydroquinone, aniline, phenol, 4-chlorophenol, p-hydroxybenzaldehyde, p-hydroxybenzoic acid and p-nitrophenol; The concentration of the organic pollutants in the wastewater is 1-2000 mg / L; The oxidant is potassium permonosulfate, and the addition amount is 300 mg / L; The input amount of the bimetallic carbon material is 150 mg / L.

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