A BDD high-performance plate material and preparation method thereof

Abstract

The present invention relates to the technical field of plate materials, specifically to a BDD high-performance plate material and a preparation method thereof: comprising the following steps: S1: selecting nickel foam as a substrate, the nickel foam having a thickness of 1.2 to 1.8 mm, and cleaning the nickel foam; S2: performing surface treatment on the nickel foam after the cleaning process, using a coating material for the surface treatment of the nickel foam, the mass of the coating material being 30 to 40% of the mass of the nickel foam; S3: performing electroplating on the nickel foam after the surface treatment to obtain a BDD high-performance plate material. In the present invention, after high-temperature firing treatment, when the firing temperature reaches a temperature close to the melting point of the nickel foam, the nickel foam is effectively combined with the metal powder, enriching the surface pore structure of the nickel foam, creating a larger interface area between the plate and the sewage, facilitating the purification reaction, and improving the use effect of the plate material.

Description

Technical Field

[0001] The invention relates to the technical field of polar plate materials, in particular to a BDD high-performance polar plate material and a preparation method thereof. Background Art

[0002] BDD plate material is a material used for sewage treatment. It can efficiently degrade a variety of difficult-to-degrade organic pollutants. It has a significant effect on the treatment of high-concentration, complex, high-chromatic, highly toxic, and difficult-to-biodegrade organic wastewater in the pharmaceutical, pesticide, petrochemical, coking, lithium battery and other industries. It can effectively reduce the COD, chromaticity and other indicators of the wastewater.

[0003] In the prior art, when preparing BDD plate materials, nickel foam with high porosity is used as a substrate for preparation. However, the surface pores of the nickel foam are realized by dense concave structures, which easily cause the depressions to be pressed during the pore-making process, resulting in a smooth surface, affecting the richness of the pores on the surface of the nickel foam, and further affecting the treatment effect of the plate material on sewage. Based on this, the present invention provides a BDD high-performance plate material and a preparation method thereof. Summary of the invention

[0004] The purpose of the present invention is to provide a BDD high-performance plate material and a preparation method thereof. The BDD high-performance plate material prepared by the present invention has a good purification effect on sewage and effectively improves the performance of the plate material.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for preparing a BDD high-performance plate material, comprising the following steps:

[0007] S1: Selecting nickel foam as a substrate, wherein the nickel foam has a thickness of 1.2 to 1.8 mm, and cleaning the nickel foam;

[0008] S2: performing surface treatment on the cleaned nickel foam by using a coating material, wherein the mass of the coating material is 30-40% of the mass of the nickel foam;

[0009] S3: The nickel foam after surface treatment is electroplated to obtain BDD high-performance plate material.

[0010] Furthermore, the cleaning method of the nickel foam is as follows: the nickel foam is placed in an ultrasonic cleaning machine, deionized water is poured into the ultrasonic cleaning machine until the nickel foam is submerged, a dilute hydrochloric acid solution is added, and after mixing evenly, the ultrasonic cleaning machine is started, and the frequency is set to 40 to 60 kHz for 12 to 16 minutes.

[0011] Furthermore, the nickel foam that has completed ultrasonic cleaning is taken out and rinsed with clean water for 4 to 6 times. After draining the water, it is placed in an oven and dried at 40 to 50° C. for 16 to 20 minutes to complete the cleaning of the nickel foam.

[0012] Furthermore, the mass of the dilute hydrochloric acid solution is 4-6% of the mass of deionized water, and the concentration of the dilute hydrochloric acid solution is 5-7%.

[0013] Furthermore, the surface treatment method of the nickel foam is as follows: after the coating material is stirred evenly, it is evenly applied to the surface of the nickel foam, and after the application is completed, it is placed in a ventilated place and left to stand for 2 to 4 minutes, and then the nickel foam is placed in an oscillator, the oscillator is set to have a frequency of 200 to 300 Hz, an amplitude of 1 to 3 mm, and an oscillation time of 2 to 4 minutes. After the oscillation is completed, the nickel foam is turned over, and the above oscillation treatment is continued, and the oscillation treatment is repeated 5 to 7 times to complete the surface coating treatment of the nickel foam.

[0014] Furthermore, the nickel foam that has completed the surface coating treatment is sent into the muffle furnace. After it is sent in, the heating rate is set to 6-8°C / min. After the temperature is raised to 130°C, the heating rate is set to 10-20°C / min. After the temperature is raised to 1020-1060°C, it is kept warm for 10-20 minutes to complete the surface treatment of the nickel foam.

[0015] Furthermore, the raw materials of the coating material are composed of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder. The mass ratio of the clean water, propylene glycol methyl ether, carbon nanotubes and metal powder is 1: (0.1-0.3): (0.08-0.12): (0.2-0.4). The metal powder uses nickel powder as a base material, and the ratio is consistent with the raw material of nickel foam.

[0016] Furthermore, the coating material is prepared by the following method: clean water, propylene glycol methyl ether and carbon nanotubes are added to a mixer, the mixer is set to 120-140r / min and stirred for 8-12min, then metal powder is added to the mixer, and the mixer is set to 260-280r / min and stirred for 8-12min to prepare the coating material.

[0017] Furthermore, the electroplating treatment method is: using a conductive fixture to fix the nickel foam in the electroplating tank, the electroplating solution is in full contact with the nickel foam, and the current density is set to 0.8-1.2A / dm 3The temperature is 40-60°C, the electroplating time is 2-4h, and after the electroplating is completed, it is sent to the oven and set to 40-60°C for drying for 10-20min to complete the electroplating of nickel foam to obtain BDD high-performance plate material, wherein the BDD content in the electroplating solution is 26-32g / L, the particle size is 0.2-0.6μm, and the electroplating solution components include nickel sulfate, nickel chloride, and boric acid, and the mass ratio is 1: (0.2-0.3): (0.2-0.3).

[0018] In a second aspect, the present invention provides a BDD high-performance plate material, which is prepared by a method for preparing a BDD high-performance plate material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by treating the surface of the nickel foam substrate, the coating material is prepared into a water-based adhesive liquid during the mixing preparation, the coating material is attached to the surface of the nickel foam, and the clean water and propylene glycol methyl ether cooperate to play the role of an adhesive, so that the carbon nanotubes and the metal powder are evenly attached to the surface of the nickel foam substrate. After coating, the excess carbon nanotubes and metal powder are shaken off by oscillation treatment, and only a thin layer of carbon nanotubes and metal powder is evenly attached to the surface and pores of the nickel foam. After high-temperature firing treatment, when the firing temperature reaches a melting point close to the nickel foam, the nickel foam and the metal powder are effectively combined, enriching the surface pore structure of the nickel foam, creating a larger interface area between the plate and the sewage, which is beneficial to the purification reaction and improves the use effect of the plate material.

[0021] 2. In the present invention, a mixture of clean water and propylene glycol methyl ether is used as an adhesive, and the adhesion property of propylene glycol methyl ether is utilized to ensure that a coated layer of carbon nanotubes and metal powders are firmly attached to the surface of the nickel foam. During the vibration treatment, it can be ensured that the metal powders attached to the surface of the nickel foam do not fall off. During high-temperature firing, the clean water and propylene glycol methyl ether are gasified after reaching 130° C. At the same time, the molecular chain movement ability of the carbon nanotubes is enhanced at high temperature, and the viscosity is increased, so that the metal powders continue to be firmly attached to the surface of the nickel foam, ensuring the stability of the optimized structure of the nickel foam surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A partial characterization comparison diagram of a BDD high-performance plate material and its preparation method is proposed for the invention. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] S1: Selecting nickel foam as a substrate, the thickness of the nickel foam is 1.2 mm, and cleaning the nickel foam;

[0026] The nickel foam is placed in an ultrasonic cleaning machine, deionized water is poured into the ultrasonic cleaning machine until the nickel foam is submerged, and then a dilute hydrochloric acid solution is added, mixed evenly, and then the ultrasonic cleaning machine is started, and the process is set at 40KHz for 12 minutes. The nickel foam that has been ultrasonically cleaned is taken out and rinsed with clean water for 4 times, and then the water is drained and placed in an oven, and the process is set at 40°C for 16 minutes to complete the cleaning of the nickel foam. The mass of the dilute hydrochloric acid solution is 4% of the mass of the deionized water, and the concentration of the dilute hydrochloric acid solution is 5%;

[0027] S2: The cleaned nickel foam is subjected to surface treatment, and a coating material is used for the surface treatment of the nickel foam, and the mass of the coating material is 30% of the mass of the nickel foam;

[0028] After the coating material is stirred evenly, it is evenly applied to the surface of the nickel foam. After the coating is completed, it is placed in a ventilated place and allowed to stand for 2 minutes. Then, the nickel foam is placed in an oscillator. The oscillator is set to have a frequency of 200 Hz, an amplitude of 1 mm, and an oscillation time of 2 minutes. After the oscillation is completed, the nickel foam is turned over and the above oscillation treatment is continued. The oscillation treatment is repeated 5 times to complete the surface coating treatment of the nickel foam. The nickel foam with the surface coating treatment is sent to a muffle furnace. After sending it in, the heating rate is set to 6°C / min. After the temperature is raised to 130°C, the heating rate is set to 10°C / min. After the temperature is raised to 1020°C, it is kept warm for 10 minutes to complete the surface treatment of the nickel foam.

[0029] The raw materials of the coating material are composed of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder. The mass ratio of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder is 1: (0.1): (0.08): (0.2). The metal powder uses nickel powder as a base material, and the ratio is consistent with the raw material of nickel foam. The coating material is prepared by the following method: clean water, propylene glycol methyl ether and carbon nanotubes are added to a mixer, the mixer is set to 120r / min and stirred for 8min, then the metal powder is added to the mixer, and the mixer is set to 260r / min and stirred for 8min to prepare the coating material;

[0030] The electroplating treatment method is: use a conductive fixture to fix the nickel foam in the electroplating tank, the electroplating solution is in full contact with the nickel foam, and the current density is set to 0.8A / dm 3 , the temperature is 40℃, the electroplating time is 2h, after the electroplating is completed, it is sent into the oven and set to 40℃ for drying for 10min, the electroplating treatment of nickel foam is completed, and the BDD high-performance plate material is obtained, wherein the BDD content in the electroplating solution is 26g / L, the particle size is 0.2μm, and the electroplating solution components include nickel sulfate, nickel chloride, and boric acid, and the mass ratio thereof is 1:(0.2):(0.2);

[0031] The scanning electron microscope image of the BDD high performance plate material obtained in this example is shown in Figure 1 .

[0032] Embodiment 2:

[0033] S1: Selecting nickel foam as a substrate, the thickness of the nickel foam is 1.5 mm, and cleaning the nickel foam;

[0034] The nickel foam is placed in an ultrasonic cleaning machine, deionized water is poured into the ultrasonic cleaning machine until the nickel foam is submerged, and then a dilute hydrochloric acid solution is added, mixed evenly, and then the ultrasonic cleaning machine is started, and the processing is set at 50KHz for 14 minutes. The nickel foam that has been ultrasonically cleaned is taken out and rinsed with clean water for 5 times, and then the water is drained and placed in an oven, and the temperature is set at 45°C for 18 minutes to complete the cleaning of the nickel foam. The mass of the dilute hydrochloric acid solution is 5% of the mass of the deionized water, and the concentration of the dilute hydrochloric acid solution is 6%;

[0035] S2: The cleaned nickel foam is subjected to surface treatment, and a coating material is used for the surface treatment of the nickel foam, and the mass of the coating material is 35% of the mass of the nickel foam;

[0036] After the coating material is stirred evenly, it is evenly applied to the surface of the nickel foam. After the coating is completed, it is placed in a ventilated place and allowed to stand for 3 minutes. Then, the nickel foam is placed in an oscillator. The oscillator is set to have a frequency of 250 Hz, an amplitude of 2 mm, and an oscillation time of 3 minutes. After the oscillation is completed, the nickel foam is turned over and the above oscillation treatment is continued. The oscillation treatment is repeated 6 times to complete the surface coating treatment of the nickel foam. The nickel foam with the surface coating treatment is sent to a muffle furnace. After sending it in, the heating rate is set to 7°C / min. After the temperature is raised to 130°C, the heating rate is set to 15°C / min. After the temperature is raised to 1040°C, it is kept warm for 15 minutes to complete the surface treatment of the nickel foam.

[0037] The raw materials of the coating material are composed of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder. The mass ratio of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder is 1: (0.2): (0.1): (0.3). The metal powder uses nickel powder as a base material, and the ratio is consistent with the raw material of nickel foam. The coating material is prepared by the following method: clean water, propylene glycol methyl ether and carbon nanotubes are added to a mixer, the mixer is set to 130r / min and stirred for 10min, then the metal powder is added to the mixer, and the mixer is set to 270r / min and stirred for 10min to prepare the coating material;

[0038] The electroplating treatment method is: use a conductive fixture to fix the nickel foam in the electroplating tank, the electroplating solution is in full contact with the nickel foam, and the current density is set to 1A / dm 3 The temperature is 50°C, the electroplating time is 3h, and after the electroplating is completed, it is sent into the oven and set to 50°C for drying for 15min to complete the electroplating treatment of nickel foam and obtain BDD high-performance electrode material. The BDD content in the electroplating solution is 30g / L, the particle size is 0.4μm, and the electroplating solution components include nickel sulfate, nickel chloride, and boric acid, and the mass ratio is 1: (0.25): (0.25).

[0039] Embodiment three:

[0040] S1: Selecting nickel foam as a substrate, the thickness of the nickel foam is 1.8 mm, and cleaning the nickel foam;

[0041] The nickel foam is placed in an ultrasonic cleaning machine, deionized water is poured into the ultrasonic cleaning machine until the nickel foam is submerged, and then a dilute hydrochloric acid solution is added, mixed evenly, and then the ultrasonic cleaning machine is started, and the processing is set at 60KHz for 16 minutes. The nickel foam that has been ultrasonically cleaned is taken out and rinsed with clean water for 6 times, and then the water is drained and placed in an oven, and the temperature is set at 50°C for 20 minutes for drying. The cleaning of the nickel foam is completed. The mass of the dilute hydrochloric acid solution is 6% of the mass of the deionized water, and the concentration of the dilute hydrochloric acid solution is 7%;

[0042] S2: The cleaned nickel foam is subjected to surface treatment, and a coating material is used for the surface treatment of the nickel foam, and the mass of the coating material is 40% of the mass of the nickel foam;

[0043] After the coating material is stirred evenly, it is evenly applied to the surface of the nickel foam. After the coating is completed, it is placed in a ventilated place and allowed to stand for 4 minutes. Then, the nickel foam is placed in an oscillator. The oscillator is set to have a frequency of 300 Hz, an amplitude of 3 mm, and an oscillation time of 4 minutes. After the oscillation is completed, the nickel foam is turned over and the above oscillation treatment is continued. The oscillation treatment is repeated 7 times to complete the surface coating treatment of the nickel foam. The nickel foam with the surface coating treatment is sent to a muffle furnace. After sending it in, the heating rate is set to 8°C / min. After the temperature is raised to 130°C, the heating rate is set to 20°C / min. After the temperature is raised to 1060°C, it is kept warm for 20 minutes to complete the surface treatment of the nickel foam.

[0044] The raw materials of the coating material are composed of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder. The mass ratio of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder is 1: (0.3): (0.12): (0.4). The metal powder uses nickel powder as a base material, and the ratio is consistent with the raw material of nickel foam. The coating material is prepared by the following method: clean water, propylene glycol methyl ether and carbon nanotubes are added to a mixer, the mixer is set to 140r / min and stirred for 12 minutes, then the metal powder is added to the mixer, and the mixer is set to 280r / min and stirred for 12 minutes to prepare the coating material;

[0045] The electroplating treatment method is: use a conductive fixture to fix the nickel foam in the electroplating tank, the electroplating solution is in full contact with the nickel foam, and the current density is set to 1.2A / dm 3 The temperature is 60°C, the electroplating time is 4h, and after the electroplating is completed, it is sent to the oven and set to 60°C for drying for 20min to complete the electroplating treatment of nickel foam and obtain BDD high-performance electrode material. The BDD content in the electroplating solution is 32g / L, the particle size is 0.6μm, and the electroplating solution components include nickel sulfate, nickel chloride, and boric acid, and the mass ratio is 1: (0.3): (0.3).

[0046] Comparative Example 1: The difference between this comparative example and Example 1 is that the foamed nickel is not cleaned in this comparative example.

[0047] Comparative Example 2: The difference between this comparative example and Example 1 is that this comparative example uses an equal amount of nickel powder to replace the metal powder.

[0048] Comparative Example 3: The difference between this comparative example and Example 1 is that: in this comparative example, the nickel foam is not subjected to an oscillation treatment.

[0049] Comparative Example 4: The difference between this comparative example and Example 1 is that: in this comparative example, the nickel foam is not subjected to surface treatment;

[0050] The scanning electron microscope image of the BDD high-performance plate material obtained in Comparative Example 4 is shown in Figure 1The BDD high-performance plate material in comparative example 4 was not surface treated during the preparation process and was compared with the surface state in Example 1 as a reference. It can be seen from the figure that the surface state of the nickel foam that was not surface treated was a concave structure, while a large amount of metal powder was attached to the surface of the nickel foam that was surface treated in Example 1, and was combined with the nickel foam, enriching the surface pore structure of the nickel foam.

[0051] Performance test: The performance test of the BDD high-performance plate materials prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 was performed, and the obtained test data are recorded in the following table:

[0052]

[0053] In the performance test, the BDD high-performance plate materials prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were connected to power and placed in a container filled with sewage, and the current density was set to 20 mA / cm 2 The electrolysis treatment time is 4h. The COD and ammonia nitrogen contents of the sewage are measured before and after treatment, and the COD removal rate and ammonia nitrogen removal rate data of each electrode material are obtained. At the same time, the color of the treated sewage is observed.

[0054] By comparing and analyzing the relevant data in the table, it can be seen that the BDD high-performance plate material prepared by the present invention has a good purification effect on sewage, which shows that the BDD high-performance plate material and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for preparing a BDD high-performance plate material, characterized in that: The following steps are involved: S1: Selecting nickel foam as a substrate, wherein the nickel foam has a thickness of 1.2 to 1.8 mm, and cleaning the nickel foam; S2: The nickel foam that has been cleaned is subjected to surface treatment, and a coating material is used for the surface treatment of the nickel foam. The nickel foam that has been subjected to surface coating treatment is fed into a muffle furnace, and a heating rate is set at 6 to 8°C / min. After the temperature is raised to 130°C, the heating rate is set at 10 to 20°C / min. After the temperature is raised to 1020 to 1060°C, the temperature is kept at 10 to 20 minutes to complete the surface treatment of the nickel foam. The mass of the coating material is 30 to 40% of the mass of the nickel foam. The raw materials of the coating material are composed of clean water, propylene glycol methyl ether, carbon nanotubes and metal powder. The mass ratio of the clean water, propylene glycol methyl ether, carbon nanotubes and metal powder is 1: (0.1-0.3): (0.08-0.12): (0.2-0.4). The metal powder uses nickel powder as a base material, and the ratio is consistent with the raw material of nickel foam. The particle size of the metal powder is less than or equal to 2 μm. S3: The nickel foam after surface treatment is electroplated to obtain BDD high-performance plate material.

2. The method for preparing the BDD high-performance plate material according to claim 1, characterized in that: The cleaning method of the nickel foam is as follows: the nickel foam is placed in an ultrasonic cleaning machine, deionized water is poured into the ultrasonic cleaning machine until the nickel foam is submerged, a dilute hydrochloric acid solution is added, and after mixing evenly, the ultrasonic cleaning machine is started and set to 40 to 60 kHz for 12 to 16 minutes.

3. The method for preparing the BDD high-performance plate material according to claim 2, characterized in that: The nickel foam that has been ultrasonically cleaned is taken out and rinsed with clean water for 4 to 6 times. After draining the water, it is placed in an oven and dried at 40 to 50° C. for 16 to 20 minutes to complete the cleaning of the nickel foam.

4. The method for preparing the BDD high-performance plate material according to claim 2, characterized in that: The mass of the dilute hydrochloric acid solution is 4-6% of the mass of deionized water, and the concentration of the dilute hydrochloric acid solution is 5-7%.

5. The method for preparing the BDD high-performance plate material according to claim 1, characterized in that: The surface treatment method of the nickel foam is as follows: after the coating material is stirred evenly, it is evenly applied to the surface of the nickel foam, and after the application is completed, it is placed in a ventilated place and left to stand for 2 to 4 minutes, and then the nickel foam is placed in an oscillator, and the oscillator is set to have a frequency of 200 to 300 Hz, an amplitude of 1 to 3 mm, and an oscillation time of 2 to 4 minutes. After the oscillation is completed, the nickel foam is turned over, and the above oscillation treatment is continued, and the oscillation treatment is repeated 5 to 7 times to complete the surface coating treatment of the nickel foam.

6. The method for preparing the BDD high-performance plate material according to claim 1, characterized in that: The coating material is prepared by the following method: clean water, propylene glycol methyl ether and carbon nanotubes are added into a mixer, the mixer is set at 120-140 r / min and stirred for 8-12 minutes, then metal powder is added into the mixer, the mixer is set at 260-280 r / min and stirred for 8-12 minutes to prepare the coating material.

7. The method for preparing the BDD high-performance plate material according to claim 1, characterized in that: The electroplating treatment method comprises: fixing the nickel foam in the electroplating tank using a conductive fixture, allowing the electroplating solution to fully contact the nickel foam, and setting the current density to 0.8-1.2 A / dm 3 The temperature is 40-60°C, the electroplating time is 2-4h, and after the electroplating is completed, it is sent to the oven and set to 40-60°C for drying for 10-20min to complete the electroplating of nickel foam to obtain BDD high-performance plate material, wherein the BDD content in the electroplating solution is 26-32g / L, the particle size is 0.2-0.6μm, and the electroplating solution components include nickel sulfate, nickel chloride, and boric acid, and the mass ratio is 1: (0.2-0.3): (0.2-0.3).

8. A BDD high-performance plate material, characterized in that: The material is prepared by the preparation method of a BDD high-performance polar plate material according to any one of claims 1 to 7.

Images