KR102583064B1 - Porous carbon material embedded with copper and silver nanoparticles and their manufacturing method - Google Patents

Abstract

The present invention relates to a method for producing an antibacterial porous carbon body in which copper nanoparticles and silver nanoparticles are dispersed, and an antibacterial porous carbon body produced thereby. According to the method for manufacturing an antibacterial porous carbon body in which copper nanoparticles and silver nanoparticles are dispersed, the agglomeration of nanoparticles can be prevented while maintaining a high nanoparticle content. In addition, an antibacterial porous carbon material in which copper nanoparticles and silver nanoparticles are dispersed can be manufactured through a simple heat treatment process without the addition of an additional reducing agent.

Description

Porous carbon material embedded with copper and silver nanoparticles and their manufacturing method}

The present invention relates to a method for producing an antibacterial porous carbon body in which copper nanoparticles and silver nanoparticles are dispersed, and an antibacterial porous carbon body produced thereby.

Carbon porous materials have received much attention due to their possible applications in several fields, including adsorbents, supercapacitors, gas storage, and catalyst supports. There is great interest in fusing these carbon porous materials with functional materials to improve their applicability in other fields. This is being collected.

To synthesize such various porous carbon materials, various methods such as chemical vapor deposition (CVD), arc discharge, and laser ablation have been developed. However, in order to introduce metal nanoparticles into the prepared carbon porous body, the bond between the carbon porous body and the metal nanoparticle must generally be strengthened through functionalization of the carbon material. In addition, when manufacturing metal nanoparticles through a separate process, a surfactant must be added to prevent the metal nanoparticles from agglomerating due to the disadvantage that the metal nanoparticles tend to aggregate easily. Additionally, in order to make metal nanoparticles, a process of reducing metal ions into metal nanoparticles is required. At this time, in most cases, metal nanoparticles are formed by reduction by adding a reducing agent or by heat treatment under hydrogen gas. However, in order to synthesize the functional carbon porous material, a simple and simple manufacturing method is required.

Meanwhile, metal-organic framework (MOF) is a structure made by coordinating metal ions and organic ligands, and is a material with the advantages of high surface area and porosity. Because metal-organic structures contain a large amount of carbon sources, they are also suitable as precursors for manufacturing carbon materials.

Accordingly, research on manufacturing functional carbon porous materials using metal-organic structures through a simple and simple manufacturing method is still needed.

The purpose of the present invention is to provide a method for producing an antibacterial porous carbon material in which copper nanoparticles and silver nanoparticles are uniformly dispersed by a simple method.

Another object of the present invention is to provide a method for producing an antibacterial porous carbon material that prevents aggregation of metal nanoparticles and does not add additional reducing agents.

The present invention includes the steps of (a) impregnating a metal-organic framework containing copper as a central metal in a solution containing a silver salt compound to support silver ions on the metal-organic framework; and (b) heat treating the metal-organic framework on which the silver ions are supported.

In the method for producing an antibacterial porous carbon material according to an embodiment of the present invention, the metal-organic framework containing copper may be produced by the reaction of a copper salt compound and an organic ligand precursor.

In the method for producing an antibacterial porous carbon material according to an embodiment of the present invention, the organic ligand precursor may include a carboxyl group and benzene-1,3,5-tricarboxylic acid. ) can be.

In the method for producing an antibacterial porous carbon material according to an embodiment of the present invention, the metal-organic framework may be a coordination polymer in which copper ions and an organic framework are coordinated.

In the method for producing an antibacterial porous carbon material according to an embodiment of the present invention, the concentration of the solution containing the silver salt compound may be 0.001 to 0.1 M.

In the method for manufacturing an antibacterial porous carbon material according to an embodiment of the present invention, the heat treatment in step (b) may be performed in an inert gas atmosphere and may be performed at a temperature of 600 to 1000°C.

In addition, the present invention provides an antibacterial carbon porous body comprising copper nanoparticles, silver nanoparticles, and a carbon porous body, wherein the copper nanoparticles and silver nanoparticles are uniformly dispersed within the pores of the carbon porous body.

In the antibacterial carbon porous body according to an embodiment of the present invention, the antibacterial carbon porous body includes primary particles in which copper nanoparticles and silver nanoparticles are uniformly dispersed in the pores of the carbon porous body, and secondary particles in which the primary particles are aggregated, , the average pore of the secondary particles formed by agglomeration of the primary particles may be larger than the average pore of the primary particles. Here, the average pore of the primary particle may be a micropore or mesopore, and the average pore of the secondary particle may be a macropore.

In the antibacterial porous carbon material according to an embodiment of the present invention, copper to silver may be contained in a weight ratio of 1:1 to 1:20, and the metal (sum of silver and copper) to carbon may be 1:0.1 to 1:0.1. It can be contained in a weight ratio of 1:3.

In the antibacterial porous carbon material according to an embodiment of the present invention, the concentration of silver on the surface and inside the porous carbon material may be uniform.

In the antibacterial porous carbon material according to an embodiment of the present invention, the diameter of the carbon porous material may be 100 nm to 1 μm, and the diameter of the copper nanoparticles and silver nanoparticles dispersed in the carbon porous material may be 10 to 200 nm. there is.

Additionally, the present invention provides an antibacterial material including an antibacterial carbon porous body.

According to the method for manufacturing an antibacterial porous carbon body in which copper nanoparticles and silver nanoparticles are dispersed, the agglomeration of nanoparticles can be prevented while maintaining a high nanoparticle content. In addition, an antibacterial porous carbon material in which copper nanoparticles and silver nanoparticles are dispersed can be manufactured through a simple heat treatment process without the addition of an additional reducing agent.

Figure 1 is a diagram showing the manufacturing process of an antibacterial porous carbon material according to the present invention.
Figure 2 is an SEM photograph of the antibacterial porous carbon material according to Example 1 of the present invention.
Figure 3 is an SEM photograph of the antibacterial porous carbon material according to Example 2 of the present invention.
Figure 4 is a PXRD spectrum of the antibacterial porous carbon material according to the present invention.
Figure 5 is a RAMAN spectrum of the antibacterial porous carbon material according to the present invention.
Figure 6 is an EDX spectrum of the antibacterial porous carbon material according to Example 1 of the present invention.
Figure 7 is an EDX spectrum of the antibacterial porous carbon material according to Example 2 of the present invention.
Figure 8 is a nitrogen adsorption isotherm curve of the antibacterial porous carbon material according to the present invention.

Hereinafter, with reference to the attached drawings, the method for manufacturing the antibacterial porous carbon body of the present invention and the antibacterial porous carbon body manufactured thereby will be described in detail.

The drawings introduced below are provided as examples so that the idea of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention.

At this time, if there is no other definition in the technical and scientific terms used, they have meanings commonly understood by those skilled in the art to which this invention pertains, and the gist of the present invention is summarized in the following description and attached drawings. Descriptions of known functions and configurations that may unnecessarily obscure are omitted.

Additionally, as used in the specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to also include the plural forms, unless the context clearly dictates otherwise.

In this specification and the appended claims, terms such as first and second are used not in a limiting sense but for the purpose of distinguishing one component from another component.

In this specification and the appended claims, terms such as include or have mean the presence of features or components described in the specification, and, unless specifically limited, one or more other features or components are added. This does not mean that the possibility of this happening is ruled out in advance.

In this specification and the appended claims, when a part of a film (layer), region, component, etc. is said to be on or on another part, it is not only the case where it is directly on top of the other part, but also when it is in contact with another part (another film (layer)) in between. This also includes cases where layers, other areas, and other components are interposed.

The method for producing an antibacterial porous carbon material according to the present invention includes the steps of (a) impregnating a metal-organic framework containing copper as a central metal in a solution containing a silver salt compound and supporting silver ions on the metal-organic framework; and (b) heat treating the metal-organic framework on which the silver ions are supported.

In one embodiment, the metal-organic framework containing copper may be prepared by the reaction of a copper salt compound and an organic ligand precursor.

In one embodiment, the copper salt compound is selected from the group consisting of copper nitrate (CuNO ₃ ), copper chloride (CuCl ₂ ), copper sulfate (CuSO ₄ ), copper perchlorate (Cu(ClO ₄ ) ₂ ), and hydrates thereof. It can be used, preferably copper nitrate or its hydrate, and most preferably copper nitrate hydrate ((CuNO ₃ ) _2· 2.5H ₂ O), but a substance that can provide copper ions If so, there are no significant restrictions.

At this time, the concentration of the copper salt compound may be 0.01 to 0.1 M, preferably 0.01 to 0.05 M, and most preferably 0.01 to 0.03 M, but is not limited thereto.

In one embodiment, the organic ligand precursor may include a carboxyl group. Non-limiting examples of the organic ligand precursor include 1,2-benzenedicarboxylic acid, 1,3-benzenedicarboxylic acid, 1,4- Benzenedicarboxylic acid (1,4-benzenedicarboxylic acid), 1,3,5-benzene-1,3,5-tricarboxylic acid, N,N'-phenylenebis(salicylidene) imine) can be selected from the group consisting of dicarboxylic acids, preferably 1,3,5-benzene-1,3,5-tricarboxylic acid, but the carboxyl group There is no significant limitation as long as it is a substance containing .

At this time, the concentration of the organic ligand precursor may be 0.001 to 0.1 M, preferably 0.001 to 0.05 M, and most preferably 0.001 to 0.01 M, but is not limited thereto.

In one embodiment, the solvent of the solution containing the copper salt compound and the organic ligand precursor may be a solvent that is not reactive with the copper salt compound or the organic ligand precursor. Here, solvents that are not reactive with the copper salt compound are tetrahydrofuran (THF), 1,2-dimethoxyethane, dimethyl ether (DME), and 1,3-dioxolane (1,3- Dioxolane), tetramethylfuran (TMF), dimethyl sulfoxide (DMSO), N-methylpyrrolidone (NMP), N-ethylpyrrolidone, N-vinylpyrrolidone, N,N -dimethylformamide (DMF) ), monomethylformamide (MMF), monomethylacetamide (MMA), and dimethylacetamide (DMA), preferably DMF, but is not limited thereto.

The metal-organic framework prepared by the reaction of the copper salt compound and the organic ligand precursor may be a coordination polymer in which copper ions and the organic framework are coordinated, where the copper ion may be coordinated with the carboxyl group of the organic framework. there is. Through these coordination bonds, uniform growth of the metal-organic framework can be induced, and the formed coordination polymer structure has a large surface area and porosity while containing a large amount of carbon source, making it a suitable structure for manufacturing carbon materials. .

In one embodiment, the solution containing the silver salt compound includes silver acetate (Ag(CH ₃ COO) ₂ ), silver nitrate (AgNO ₃ ), silver chloride (AgCl), silver iodide (AgI), silver chlorate (AgClO ₃ ), and perchloric acid. It can be selected from the group consisting of silver (AgClO ₄ ) and silver fluoride (AgF), and preferably silver acetate (Ag(CH ₃ COO) ₂ ) can be selected and used, as long as it is a material that can provide silver ions. It is not greatly limited.

At this time, the concentration of the solution containing the silver salt compound may be 0.001 to 0.1 M, preferably 0.003 to 0.08 M, and most preferably 0.005 to 0.05 M, but is not limited thereto.

In one embodiment, the heat treatment in step (b) may be performed in an inert gas atmosphere. Here, non-limiting examples of the inert gas include helium, argon, neon, and nitrogen. Preferably, the process may be performed in a nitrogen gas atmosphere, but is not limited thereto.

Additionally, the heat treatment may be performed at a temperature of 600 to 1000°C, preferably at a temperature of 650 to 950°C, and most preferably at a temperature of 700 to 900°C. In addition, the temperature may be raised from room temperature to the heat treatment temperature at a rate of 1 to 10°C/min, preferably at a rate of 2 to 8°C/min, and most preferably at a rate of 3 to 6°C/min. The temperature can be increased at a rapid rate, but the heat treatment temperature and temperature increase rate are not limited thereto.

In order to introduce metal nanoparticles into a carbon material, the bond between the carbon material and the metal nanoparticle must be strengthened through functionalization of the carbon material. In addition, in order to overcome the disadvantage of metal nanoparticles agglomerating when manufacturing metal nanoparticles, a surfactant must be added to prevent this, and a reducing agent must be added or heat treatment under hydrogen gas must be performed to reduce metal ions to metal nanoparticles. There is a problem that needs to be addressed.

However, the above manufacturing method consists of a single step of heat treating the metal-organic framework in an inert gas, which takes less time and less time compared to manufacturing carbon materials using existing methods such as electric arc, chemical vapor deposition, nanocasting, and ultrasonic spray pyrolysis. Not only can the cost be significantly reduced and the manufacturing method is safe, but as the organic ligands that make up the metal-organic framework are decomposed, the metal ions are reduced to metal nanoparticles, so there is no need to add an additional reducing agent, and after heat treatment, the metal ions are reduced to metal nanoparticles. The organic framework is converted into a carbon material, and the pores of the metal-organic framework have the advantage of preventing aggregation of nanoparticles.

The antibacterial porous carbon material according to the present invention includes copper nanoparticles, silver nanoparticles, and carbon porous material, and the copper nanoparticles and silver nanoparticles are uniformly dispersed in the pores of the carbon porous material.

In one embodiment, the antibacterial carbon porous body includes primary particles in which copper nanoparticles and silver nanoparticles are uniformly dispersed in the pores of the carbon porous body, and secondary particles in which the primary particles are agglomerated, and by agglomeration of the primary particles The average pore of the secondary particles formed may be larger than the average pore of the primary particles.

Here, the average particle diameter of the primary particles may be 100 nm to 1 μm, preferably 200 nm to 900 nm, and most preferably 300 to 800 nm, and the average particle diameter of the secondary particles may be 500 nm to 10 μm. It may be 1 to 9 μm, and most preferably 2 to 8 μm.

Here, the average pore of the primary particle may be a micropore or mesopore, and the average pore of the secondary particle may be a macropore.

The antibacterial porous carbon material containing the primary particles and secondary particles has a large surface area due to the small pores of the primary particles and can exhibit excellent reactivity against pathogens and viruses. At the same time, because the average pores of the secondary particles are larger than the average pores of the primary particles, pathogens and viruses can easily penetrate into the antibacterial porous carbon carbon material, resulting in excellent antibacterial activity.

In one embodiment, the antibacterial porous carbon material may contain copper to silver at a weight ratio of 1:1 to 1:20, preferably 1:1.05 to 1:15, and most preferably copper to silver at a weight ratio of 1:1 to 1:20. Preferably, it may be contained in a weight ratio of 1:1.1 to 1:10.

In addition, metal (sum of silver and copper) may be contained in a weight ratio of 1:0.1 to 1:3, preferably 1:0.3 to 1:2.5, and most preferably, to carbon. It may be contained in a weight ratio of 1:0.5 to 1:2, but the weight ratio of silver to copper and the weight ratio of metal to carbon are not limited thereto.

In one embodiment, silver may be evenly distributed not only on the surface but also inside the antibacterial porous carbon body, and the weight ratio of silver to copper may be similar from the surface to the inside of the antibacterial porous carbon body.

Since copper ions are coordinated with the organic framework and exist in the form of a coordination polymer, they are uniformly distributed in the antibacterial carbon porous body, and silver ions are evenly supported not only on the surface but also inside the metal-organic framework, so they are antibacterial carbon Silver may be evenly distributed on the surface and inside the porous body, and the weight ratio of silver to copper may also be similar.

The antibacterial porous carbon material has the advantage of excellent antibacterial properties against various pathogens and viruses by simultaneously containing copper nanoparticles and silver nanoparticles. However, when copper is exposed to moisture or the atmosphere, it is more easily oxidized than silver and has lower antibacterial properties, which may result in lower durability. However, as silver, which has excellent oxidation stability, is present in a high concentration on the surface of the antibacterial porous carbon material, it can have high antibacterial durability by suppressing the oxidation of copper, and the synergistic antibacterial effect of containing copper and silver at the same time can be maintained for a long time. It has advantages.

In one embodiment, the antibacterial porous carbon material may have a diameter of 100 nm to 1 μm, preferably 200 to 900 nm, and most preferably 300 to 800 nm. In addition, the diameter of the copper nanoparticles and silver nanoparticles dispersed in the antibacterial porous carbon material may be 10 to 200 nm, preferably 20 to 190 nm, and most preferably 30 to 180 nm. The diameters of the antibacterial porous carbon material and the copper nanoparticles and silver nanoparticles dispersed in the antibacterial porous carbon material are not limited to this.

In addition, the present invention is characterized by providing an antibacterial material including the antibacterial carbon porous body. The antibacterial porous carbon material simultaneously contains copper nanoparticles and silver nanoparticles with excellent antibacterial properties, and has a high content of these nanoparticles and has a large surface area, so it can provide an excellent antibacterial material.

Hereinafter, the present invention will be described in detail through examples. However, these are for explaining the present invention in more detail, and the scope of the present invention is not limited by the following examples.

<Example 1> Preparation of antibacterial porous carbon material with dispersed copper nanoparticles and silver nanoparticles

1. Preparation of copper-based metal-organic framework materials

(CuNO ₃ ) ₂ ·2.5H ₂ O 79.5 mg (0.34 mmol) and 1,3,5-benzene-1,3,5-tricarboxylic acid (bezene-1,3,5-tricarboxylic acid) 29.4 mg (0.14 mmol) with N,N -A precursor solution was prepared by dissolving in 20 mL of dimethylformamide (DMF). In addition, a solution of 10 mL of tertiary distilled water, 5 mL of ethanol, and 124 μL of pyridine was prepared, and the three solutions were mixed and heated in an oil bath at 80°C for 30 minutes to form a copper-based copper-based product using a solvent heating synthesis method. A metal-organic structure (HKUST-1) was prepared. Afterwards, the synthesized metal-organic structure (HKUST-1) was washed several times through centrifugation and redispersion cycles using DMF and ethanol. In this process, the copper-based metal-organic structure can be separated into the pure particles desired in the present invention. Particles precipitated through centrifugation were vacuum dried for 1 hour.

2. Preparation of metal-organic structure material carrying silver ions

The metal-organic structure material in which silver ions are dispersed (HKUST-1/Ag ⁺ ) can be obtained with different contents by adjusting the amount of Ag(CH ₃ COO) ₂ . The reagent that provides silver ions is Ag(CH ₃ COO) ₂ . _2.5 mg (0.015 mmol) of Ag(CH ₃ COO) 2 was dissolved in 2.4 mL of distilled water, and 15.0 mg of the copper-based metal-organic structure (HKUST-1) prepared in Example 1 was dissolved in Ag(CH ₃ COO). ₂ It was added to the aqueous solution and mixed. The mixture was shaken at room temperature for 30 minutes, then centrifuged, and the precipitated particles were quickly washed with ethanol and dried in vacuum for 1 hour to obtain a metal-organic structure material carrying silver ions.

3. Manufacturing of antibacterial porous carbon material with dispersed copper and silver nanoparticles

The vacuum-dried particles in Step 2 were placed in a tube electric furnace and calcined to 800°C by raising the temperature at a temperature increase rate of 5°C/min under nitrogen conditions. After reaching 800°C, heat treatment was performed for 5 hours and cooled to room temperature to obtain a carbon material in which copper and silver nanoparticles were dispersed.

<Example 2> Preparation of an antibacterial porous carbon material in which copper nanoparticles and silver nanoparticles with different amounts of silver ions are dispersed

The same method as Example 1 was prepared except that 6.3 mg (0.038 mmol) of Ag(CH ₃ COO) ₂ was used instead of 2.5 mg (0.015 mmol) in step 2 of Example 1.

<Experimental example> Analysis of physical properties of carbon material with dispersed copper and silver nanoparticles

1. SEM image analysis

Referring to Figures 2 and 3, it can be seen that a carbon porous body was formed and that copper nanoparticles and silver nanoparticles were evenly dispersed on the surface of the carbon porous body.

More specifically, it can be seen that copper nanoparticles and silver nanoparticles are uniformly dispersed in the pores of the carbon porous material in the form of primary particles and secondary particles agglomerated primary particles, and secondary particles formed by agglomeration of primary particles It can be seen that the average pore of is larger than the average pore of the primary particle.

In addition, it was confirmed that the diameter of the carbon porous body was about 100 to 600 nm, and the diameter of the copper nanoparticles dispersed in the carbon porous body was about 10 to 200 nm.

2. PXRD spectral analysis

Referring to FIG. 4, it was confirmed that peaks of copper and silver nanoparticles appeared, confirming that both the materials of Examples 1 and 2 were carbon porous bodies in which copper nanoparticles and silver nanoparticles were dispersed.

In the case of the carbon porous body of Example 1, it can be confirmed that copper nanoparticles are the main product and a small amount of silver nanoparticles are contained, and in the case of the carbon porous body of Example 2, the amount of silver nanoparticles contained compared to Example 1 It was confirmed that this increased.

3. RAMAN spectrum analysis

Referring to Figure 5, the D band, which is unique to carbon materials, was observed at about 1330 cm ^-1 and the G band was observed at about 1610 cm ^-1 . Therefore, it was confirmed that the materials of Examples 1 and 2 were made of carbon.

4. EDX spectral analysis

Referring to Figures 6 and 7, it was confirmed that copper nanoparticles and silver nanoparticles were dispersed in the carbon porous body prepared in Example 1 and Example 2, and the silver nanoparticle content of the carbon porous body of Example 2 was It was confirmed that it was higher. Detailed analysis results are shown in Table 1 below.

Example 1 Example 2 C (wt%) 34.56 28.53 N (wt%) 4.87 5.21 O (wt%) 31.81 28.17 Cu (wt%) 26.12 20.25 Ag (wt%) 2.65 17.84 Total (wt%) 100.00 100.00

5. Nitrogen adsorption isotherm curve analysis

Referring to Figure 8, it was confirmed that both the materials of Example 1 and Example 2 were porous materials.

More specifically, the BET surface area of Example 1 was 250.33 m ² /g, and the BET surface area of Example 2 was 210.39 m ² /g. Additionally, the pore volume of Example 1 was 0.19 cm ³ /g, and the pore volume of Example 2 was 0.19 cm ³ /g.

Through this, it was confirmed that as the amount of dispersed silver nanoparticles increased, there was no significant change in pore volume, but the BET surface area tended to decrease.

This method of manufacturing a carbon porous body in which copper nanoparticles and silver nanoparticles are dispersed, and the carbon porous body manufactured thereby, can prevent agglomeration of nanoparticles while having a high nanoparticle content. In addition, a carbon porous body in which copper nanoparticles and silver nanoparticles are dispersed can be manufactured through a simple heat treatment process without adding an additional reducing agent.

Claims (17)

(a) impregnating a metal-organic framework containing copper as a central metal in a solution containing a silver salt compound to support silver ions on the metal-organic framework; and
(b) heat treating the metal-organic framework on which the silver ions are supported,
A method of producing an antibacterial porous carbon body, wherein the metal-organic framework containing copper is manufactured by the reaction of a copper salt compound and an organic ligand precursor.
delete According to paragraph 1,
A method for producing an antibacterial porous carbon material, wherein the organic ligand precursor contains a carboxyl group.
According to paragraph 3,
A method of producing an antibacterial porous carbon material, wherein the organic ligand precursor is benzene-1,3,5-tricarboxylic acid.
According to paragraph 1,
A method of producing an antibacterial porous carbon material, wherein the metal-organic framework is a coordination polymer in which copper ions and an organic framework are coordinated.
According to paragraph 1,
A method for producing an antibacterial porous carbon material, wherein the concentration of the solution containing the silver salt compound is 0.001 to 0.1 M.
According to paragraph 1,
The heat treatment in step (b) is performed in an inert gas atmosphere.
According to paragraph 1,
The heat treatment in step (b) is performed at a temperature of 600 to 1000°C.
In the antibacterial porous carbon material,
Contains copper nanoparticles, silver nanoparticles, and carbon porous material,
The copper nanoparticles and silver nanoparticles are uniformly dispersed within the pores of the carbon porous material,
The copper nanoparticles and silver nanoparticles include primary particles uniformly dispersed in the pores of the carbon porous body and secondary particles in which the primary particles are aggregated,
An antibacterial porous carbon material, characterized in that the average pores of the secondary particles formed by agglomeration of the primary particles are larger than the average pores of the primary particles.
delete According to clause 9,
The average pore of the primary particle is a micropore or mesopore, and the average pore of the secondary particle is a macropore.
According to clause 9,
An antibacterial porous carbon material containing copper to silver in a weight ratio of 1:1 to 1:20.
According to clause 9,
An antibacterial porous carbon material containing metal (sum of silver and copper) to carbon at a weight ratio of 1:0.1 to 1:3.
According to clause 9,
An antibacterial porous carbon material with uniform silver concentration on the surface and inside the carbon porous material.
According to clause 9,
An antibacterial carbon porous body having a diameter of 100 nm to 1 μm.
According to clause 9,
An antibacterial carbon porous body wherein the copper nanoparticles and silver nanoparticles dispersed in the carbon porous body have a diameter of 10 to 200 nm.
An antibacterial material comprising the antibacterial porous carbon material according to claim 9.