Preparation method of coconut shell carbon-based loaded organic photovoltaic material photocatalyst for removing vibrio

Abstract

The invention discloses a preparation method of a coconut shell carbon-based loaded organic photovoltaic material photocatalyst for removing vibrio. The method comprises the following operation steps: A, drying cleaned coconut shells until the coconut shells are completely dried; b, crushing coconut shells with a crusher, and sieving with a 200-mesh sieve to obtain coconut shell powder; c, drying the coconut shell powder at 100 DEG C for 24 hours, and performing high-temperature pyrolysis in a tubular furnace to obtain modified carbon-based material coconut shell carbon particles; d, mixing an organic photovoltaic material and chloroform according to the following weight ratio: 0.01-0.02 g of the organic photovoltaic material and 10-20 ml of chloroform to obtain an organic photocatalyst mixed solution; e, uniformly coating modified carbon-based material coconut shell carbon particles with the organic photocatalyst mixed solution obtained in the step D, and drying at 60 DEG C for 24 hours to obtain a coconut shell carbon-based loaded organic photocatalyst; and F, adding the coconut shell carbon-based loaded organic photocatalyst into a reinforcing agent polyethylene glycol solution, uniformly mixing for 0.5 h, and drying at 60 DEG C for 12 h to obtain the coconut shell carbon-based loaded organic photovoltaic material photocatalyst for removing vibrio. The photocatalyst obtained by the method disclosed by the invention can realize efficient removal of the vibrio and can be repeatedly utilized, the problems of a photocatalyst loading process and cyclic utilization are solved, and a real green, environment-friendly and pollution-free treatment method is provided for removal of the vibrio.

Description

Technical Field

[0001] The invention relates to the technical field of functional material preparation, in particular to a method for preparing a photocatalyst for removing Vibrio by using a coconut shell carbon-based loaded organic photovoltaic material. Background Art

[0002] Contaminated seawater is one of the biggest sources of economic losses in aquaculture (fish farming, shellfish farming, etc.) and fishery activities. Vibrio is a pathogenic bacterium widely carried by seafood such as fish, shrimp and mollusks. Eating these raw or improperly processed seafood is considered the main cause of human Vibrio parahaemolyticus infection. Antibiotics were once considered to be an excellent antibacterial agent for controlling Vibrio parahaemolyticus. To date, antibiotics remain the most commonly used method to indulge bacterial infections in aquaculture, but this treatment does not prevent viruses or toxins and can enhance antibiotic resistance. In order to eliminate potential pathogens, disinfection procedures such as chlorination, UVC disinfection, using peracetic acid or hydrogen peroxide or ozonation are currently applied in closed-loop aquaculture systems. These methods may result in toxic byproducts in the water, are not environmentally friendly, and cannot be reused. Therefore, it is urgent to develop a relatively green, safe, efficient and reusable photocatalyst alternative to seawater disinfection to control Vibrio in seafood. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a coconut shell carbon-based loaded organic photovoltaic material photocatalyst for removing Vibrio. The photocatalyst obtained by the method can achieve efficient removal of Vibrio and can be reused, providing a truly green, environmentally friendly and pollution-free treatment method for the removal of Vibrio.

[0004] The present invention solves the above technical problems with the following technical solutions:

[0005] The present invention provides a method for preparing a coconut shell carbon-based organic photovoltaic material-supported photocatalyst for removing Vibrio, comprising the following steps:

[0006] A. Dry the cleaned coconut shell until it is completely dry;

[0007] B. Crushing the completely dried coconut shell with a pulverizer, passing through a 200 mesh sieve, to obtain coconut shell powder;

[0008] C. Dry the coconut shell powder at 100° C. for 24 h and then place it in a tube furnace for high-temperature pyrolysis treatment to obtain modified carbon-based material coconut shell carbon particles;

[0009] D. Mixing an organic photovoltaic material and chloroform in the following weight ratio: 0.01-0.02 g of organic photovoltaic material: 10-20 ml of chloroform to obtain an organic photocatalyst mixed solution; the organic photovoltaic material is PM6:BTP-2S, PM6:BTP-2O or PM6:BTP-OS;

[0010] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based material coconut shell carbon particles, and dried at 60° C. for 24 hours to obtain a coconut shell carbon-based supported organic photocatalyst;

[0011] F. Add the coconut shell carbon-based supported organic photocatalyst to the enhancer polyethylene glycol solution, add 5 mL of polyethylene glycol solution to every 5 g of organic photocatalyst, mix evenly for 0.5 h, and then dry at 60° C. for 12 h to obtain the coconut shell carbon-based supported organic photovoltaic material photocatalyst for removing Vibrio.

[0012] In step A of the present invention, the operation of the drying treatment is to place the coconut shell in a forced air drying oven at a temperature of 70° C. and dry it for 48 hours to make it completely dry.

[0013] In step B of the present invention, the coconut shell is crushed for 3 to 5 minutes.

[0014] In step C of the present invention, the operation of the tubular furnace for high-temperature pyrolysis treatment is as follows: putting the coconut shell powder into the tubular furnace, closing the furnace plug, evacuating for 15 minutes, passing nitrogen for 20 minutes, heating to 200° C. at a heating rate of 5° C. / min under nitrogen protection, then heating to 700° C. at a heating rate of 10° C. / min, keeping for 3 hours, cooling to room temperature, and bagging for standby use.

[0015] In step E of the present invention, the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles is 1:5000-10000.

[0016] In step F of the present invention, the enhancer polyethylene glycol solution is prepared by mixing the following raw materials in weight percentage: 5% to 20% polyethylene glycol and 80% to 95% ultrapure water.

[0017] In step D of the present invention, the organic photovoltaic materials PM6:BTP-2S, PM6:BTP-2O, and PM6:BTP-OS are mixed in a weight ratio of 1:1.

[0018] In step D of the present invention, when the organic photovoltaic material is mixed with chloroform, the mixture is stirred and dissolved at 80° C. for 1 hour.

[0019] The present invention has the following beneficial effects:

[0020] (1) The photocatalyst obtained by the method of the present invention can achieve the removal of Vibrio by modified carbon-based materials, with a very good removal effect, a removal rate of more than 90%, and can be reused.

[0021] (2) Compared with inorganic catalysts, the photocatalyst obtained by the method of the present invention has unique advantages in wastewater purification, such as rapid and effective exciton dissociation, adjustable energy level, wide absorption spectrum and excellent chemical stability, so that it can produce a large number of hydroxyl radicals and holes with strong oxidizing properties in water, which can completely and quickly oxidize and remove Vibrio.

[0022] (3) The matrix material used in the present invention is a natural product carbon-based material with many excellent properties such as hydrophilicity, greenness, high porosity, large specific surface area, etc. The organic photovoltaic material is loaded on the matrix material for repeated use and is degradable, thus achieving true green friendliness and no pollution to the environment, which is in line with the national development concept of "low-carbon, environmentally friendly, green and renewable energy technology". BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a graph showing the efficiency of photocatalyst degradation of Vibrio obtained in Example 1 of the present invention.

[0024] Figure 2 This is a graph showing the efficiency of photocatalyst degradation of Vibrio obtained in Example 2 of the present invention.

[0025] Figure 3 This is a graph showing the efficiency of photocatalyst degradation of Vibrio obtained in Example 3 of the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below in conjunction with specific embodiments, but the present invention is not limited thereto.

[0027] Example 1

[0028] The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials includes the following steps:

[0029] A. Wash the coconut shell with ultrapure water and put it into a blast drying oven at 70°C for 48 hours to make the coconut shell completely dry;

[0030] B. Use a crusher to crush the completely dried coconut shell for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0031] C. Dry the coconut shell powder at 100°C for 24 hours and then put it into a tubular furnace for high-temperature pyrolysis treatment to obtain modified carbon-based coconut shell carbon particles. During the operation, put the coconut shell powder into the tubular furnace, close the furnace plug, evacuate for 15 minutes, pass nitrogen for 20 minutes, and then heat it to 200°C at a heating rate of 5°C / min under nitrogen protection, and then heat it to 700°C at a heating rate of 10°C / min, keep it for 3 hours, and then cool it

[0032] Bring to room temperature and pack in bags for later use;

[0033] D. Mixing 0.015 g of an organic photovoltaic material PM6:BTP-2S with 15 ml of chloroform to obtain an organic photocatalyst mixed solution, wherein PM6:BTP-2S is obtained by mixing PM6 and BTP-2S at a weight ratio of 1:1; during preparation, the organic photovoltaic material and chloroform are mixed and stirred and dissolved at 80° C. for 1 hour;

[0034] E. The organic photocatalyst mixed solution obtained in step D is evenly coated on the modified carbon-based material coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain the coconut shell carbon-based supported organic photocatalyst, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles is 1:7500; F. 5 g of the coconut shell carbon-based supported organic photocatalyst in step E is added to 5 ml of the enhancer polyethylene glycol solution.

[0035] The solution was uniformly mixed for 0.5h, and then dried at 60°C for 12h to obtain the coconut shell carbon-based organic photovoltaic material photocatalyst for removing Vibrio of the present invention; wherein the polyethylene glycol solution was prepared by mixing the following raw materials in weight percentage: 10% polyethylene glycol and 90% deionized water.

[0036] The photocatalyst (50 mg) prepared in this example was used to treat Vibrio (1×10 7 CFU / mL) degradation, the removal rate exceeded 90% in 100 minutes, and the removal effect was very good. Figure 1 shown.

[0037] Example 2

[0038] The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials includes the following steps:

[0039] A. Wash the coconut shell with ultrapure water and put it into a blast drying oven at 70°C for 48 hours to make the coconut shell completely dry;

[0040] B. Use a crusher to crush the completely dried coconut shell for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0041] C. Dry the coconut shell powder at 100°C for 24 hours and then put it into a tube furnace for high-temperature pyrolysis to obtain the modified carbon-based material coconut shell carbon particles. During the operation, put the coconut shell powder into the tube furnace, close the furnace plug, and evacuate for 15

[0042] min, and then heated to 400 °C at a rate of 5 °C / min under nitrogen protection for 20 min.

[0043] 200℃, then heated to 700℃ at a heating rate of 10℃ / min, kept for 3h and cooled to room temperature.

[0044] Warm, bag and set aside;

[0045] D. Mixing 0.01 g of an organic photovoltaic material PM6:BTP-2O with 10 ml of chloroform to obtain an organic photocatalyst mixed solution, wherein PM6:BTP-2O is obtained by mixing PM6 and BTP-2O in a weight ratio of 1:1; during preparation, the organic photovoltaic material and chloroform are mixed and stirred and dissolved at 80° C. for 1 hour;

[0046] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based material coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain a coconut shell carbon-based supported organic photocatalyst, wherein

[0047] The weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles is 1:5000; F. Add 5g of the coconut shell carbon-based organic photocatalyst loaded in step E to 5ml of the enhancer polyethylene glycol solution.

[0048] The solution was uniformly mixed for 0.5h, and then dried at 60°C for 12h to obtain the coconut shell carbon-based organic photovoltaic material photocatalyst for removing Vibrio of the present invention, wherein the polyethylene glycol solution was prepared by mixing the following raw materials in weight percentage: 5% polyethylene glycol and 95% deionized water.

[0049] The photocatalyst (50 mg) prepared in this example was used for Vibrio (1×10 7 CFU / mL) degradation, the removal rate exceeded 90% in 100 minutes, and the removal effect was very good. Figure 2 shown.

[0050] Example 3

[0051] The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials includes the following steps:

[0052] A. Wash the coconut shell with ultrapure water and put it into a blast drying oven at 70℃ for 48h to make the coconut shell

[0053] Completely dry;

[0054] B. Use a crusher to crush the completely dried coconut shell for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0055] C. Dry the coconut shell powder at 100℃ for 24h and then put it into a tube furnace for high temperature pyrolysis to obtain the modified carbon-based material coconut shell carbon particles. During the operation, put the coconut shell powder into the tube furnace, close the furnace plug, and evacuate the

[0056] After heating for 15 min, nitrogen was passed for 20 min, and then heated to 200 °C at a heating rate of 5 °C / min under nitrogen protection, and then heated to 700 °C at a heating rate of 10 °C / min, kept for 3 h, and then cooled to

[0057] Room temperature, bag and set aside;

[0058] D. Mixing 0.02 g of an organic photovoltaic material PM6:BTP-OS with 20 ml of chloroform to obtain an organic photocatalyst mixed solution, wherein PM6:BTP-OS is obtained by mixing PM6 and BTP-OS at a weight ratio of 1:1; during preparation, the organic photovoltaic material and chloroform are mixed and stirred and dissolved at 80° C. for 1 hour;

[0059] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based material coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain a coconut shell carbon-based supported organic photocatalyst, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles is 1:10000;

[0061] F. Add 5 ml of the enhancer polyethylene glycol solution to 5 g of the coconut shell carbon-based organic photocatalyst of step E and mix evenly for 0.5 h, and then dry at 60° C. for 12 h to obtain the coconut shell carbon-based organic photovoltaic material photocatalyst for removing Vibrio of the present invention, wherein the polyethylene glycol solution is prepared by mixing the following raw materials in weight percentage: 20% polyethylene glycol and 80% deionized water.

[0062] The photocatalyst (50 mg) prepared in this example was used for Vibrio (1×10 7 CFU / mL) degradation, the removal rate exceeded 90% in 70 minutes, and the removal effect was very good. Figure 3 shown.

Claims

1. A method for preparing a coconut shell carbon-based organic photovoltaic material photocatalyst for removing Vibrio, characterized in that: The method comprises the following steps: A. Dry the cleaned coconut shell until it is completely dry; B. Crushing the completely dried coconut shell with a pulverizer, passing through a 200 mesh sieve, to obtain coconut shell powder; C. Dry the coconut shell powder at 100° C. for 24 h and then place it in a tube furnace for high-temperature pyrolysis treatment to obtain modified carbon-based material coconut shell carbon particles; D. Mixing an organic photovoltaic material and chloroform in the following weight ratio: 0.01-0.02 g of organic photovoltaic material: 10-20 ml of chloroform to obtain an organic photocatalyst mixed solution; the organic photovoltaic material is PM6:BTP-2S, PM6:BTP-2O or PM6:BTP-OS; E. The organic photocatalyst mixed solution obtained in step D is evenly coated on the modified carbon-based material coconut shell carbon particles, and dried at 60° C. for 24 hours to obtain a coconut shell carbon-based supported organic photocatalyst; F. Add the coconut shell carbon-based supported organic photocatalyst to the enhancer polyethylene glycol solution, add 5 mL of polyethylene glycol solution to every 5 g of organic photocatalyst, mix evenly for 0.5 h, and then dry at 60° C. for 12 h to obtain the coconut shell carbon-based supported organic photovoltaic material photocatalyst for removing Vibrio.

2. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1, characterized in that: In step A, the operation of the drying treatment is to place the coconut shell in a forced air drying oven at a temperature of 70° C. and dry it for 48 hours to make it completely dry.

3. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1 or 2, characterized in that: In step B, the coconut shell is crushed for 3 to 5 minutes.

4. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1 or 2, characterized in that: In step C, the operation of the tubular furnace for high-temperature pyrolysis treatment is: putting the coconut shell powder into the tubular furnace, closing the furnace plug, evacuating for 15 minutes, passing nitrogen for 20 minutes, heating to 200°C at a heating rate of 5°C / min under nitrogen protection, and then heating to 700°C at a heating rate of 10°C / min, keeping for 3 hours, cooling to room temperature, and bagging for later use.

5. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1 or 2, characterized in that: In step E, the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles is 1:5000-10000.

6. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1 or 2, characterized in that: In step F, the enhancer polyethylene glycol solution is prepared by mixing the following raw materials in weight percentage: 5% to 20% polyethylene glycol and 80% to 95% ultrapure water.

7. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1 or 2, characterized in that: In step D, the organic photovoltaic materials PM6:BTP-2S, PM6:BTP-2O, and PM6:BTP-OS are mixed at a weight ratio of 1:

1.

8. The method for preparing a photocatalyst for removing Vibrio by using coconut shell carbon-based organic photovoltaic materials according to claim 1 or 2, characterized in that: In step D, the organic photovoltaic material is mixed with chloroform and dissolved by stirring at 80° C. for 1 hour.

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