Preparation method of carbon-based loaded organic photovoltaic material photocatalyst for removing formaldehyde indoors

Abstract

The invention discloses a preparation method of a carbon-based loaded organic photovoltaic material photocatalyst for removing formaldehyde indoors. The method comprises the following operation steps: A, cleaning coconut shells, and drying until the coconut shells are completely dried; b, crushing the completely dried coconut shells with a crusher, and sieving with a 200-mesh sieve to obtain coconut shell powder; c, drying the coconut shell powder, and performing high-temperature pyrolysis treatment on the dried coconut shell powder 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; and 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 the carbon-based loaded organic photovoltaic material indoor formaldehyde removal photocatalyst. The photocatalyst obtained by the method disclosed by the invention can efficiently and quickly remove formaldehyde in an indoor environment, can be repeatedly utilized, solves the problems of a photocatalyst loading process and cyclic utilization, and provides a real green, environment-friendly and pollution-free treatment method for removing formaldehyde in the indoor environment.

Description

Technical Field

[0001] The invention relates to the technical field of functional material preparation, and in particular to a method for preparing a carbon-based loaded organic photovoltaic material photocatalyst for indoor formaldehyde removal. Background Art

[0002] Generally speaking, long-term exposure to volatile organic compounds emitted by building construction or decoration materials in indoor environments can cause serious damage to human health. In recent years, formaldehyde has been considered as a major indoor air pollutant that can cause serious health problems. Therefore, there is an urgent need to find an efficient and environmentally friendly formaldehyde removal method.

[0003] At present, the main methods for removing formaldehyde include physical adsorption, chemical adsorption, photocatalytic oxidation, thermal catalytic oxidation, plasma technology, biological / plant filtration and other treatment methods. However, due to the problems of limited adsorption capacity, high energy consumption, high temperature, by-product generation, low efficiency and other problems of the above methods, the removal of indoor formaldehyde is still a challenging problem. Therefore, it is urgent to develop a green and environmentally friendly photocatalyst preparation method that has simple use conditions and can efficiently remove formaldehyde in indoor environments. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a carbon-based loaded organic photovoltaic material photocatalyst for removing formaldehyde indoors. The photocatalyst obtained by the method can achieve efficient removal of formaldehyde under indoor conditions and can be reused, providing a truly green, environmentally friendly and pollution-free treatment method for removing formaldehyde under indoor conditions.

[0005] The present invention solves the above technical problems with the following technical solutions:

[0006] The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material loaded with organic photovoltaic materials comprises the following steps:

[0007] A. Clean the coconut shell and dry it until it is completely dry;

[0008] B. Crushing the completely dried coconut shell with a pulverizer and passing it through a 200 mesh sieve to obtain coconut shell powder;

[0009] C. Drying the coconut shell powder at 100° C. for 30 min and then placing it in a tubular furnace for high-temperature pyrolysis treatment to obtain modified carbon-based material coconut shell carbon particles;

[0010] D. Mix the 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 PCE10:PC 71 BM or PTQ10:PC 71 BM;

[0011] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain a carbon-based organic photovoltaic material-loaded photocatalyst for removing formaldehyde indoors.

[0012] In step A of the present invention, the drying treatment refers to placing the coconut shell in a forced air drying oven at a temperature of 70° C. for 48 hours.

[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 D of the present invention, the PCE10:PC 71 BM, PTQ10:PC 71 BM are mixed in a weight ratio of 1:1.

[0017] In step D of the present invention, during preparation, the organic photovoltaic material is mixed with chloroform and then stirred and dissolved at 80° C. for 1 hour.

[0018] The method of the present invention has the following beneficial effects:

[0019] (1) The photocatalyst obtained by the method of the present invention can realize the removal of formaldehyde by modified carbon-based materials under indoor conditions, with a very good removal effect, a removal rate of about 99.5%, and can be reused.

[0020] (2) Compared with inorganic catalysts, the photocatalyst obtained by the method of the present invention has unique advantages in removing volatile organic compounds, and has the advantages of rapid and effective exciton dissociation, adjustable energy level, wide absorption spectrum and excellent chemical stability. During the photocatalytic reaction, a large number of hydroxyl radicals and holes with strong oxidizing properties can be generated, which can completely and quickly oxidize and remove formaldehyde.

[0021] (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., and the organic photovoltaic material loaded on the matrix material is reusable and degradable, achieving true green friendliness and environmental pollution-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a test chart of the stability of the photocatalyst obtained in Example 1 of the present invention in removing formaldehyde indoors. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with specific embodiments, but the present invention is not limited thereto.

[0024] Example 1

[0025] The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material is carried out according to the following steps:

[0026] 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;

[0027] B. Grind the completely dried coconut shell with a grinder for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0028] C. Dry the coconut shell powder at 100°C for 30 minutes 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 down.

[0029] Bring to room temperature and pack in bags for later use;

[0030] D. Organic photovoltaic material PCE10:PC 71 BM 0.01g was mixed with chloroform 10ml to obtain an organic photocatalyst mixed solution, wherein PCE10:PC 71 BM is composed of PCE10 and PC 71 BM is mixed in a weight ratio of 1:1; during preparation, the organic photovoltaic material is mixed with chloroform and then stirred and dissolved at 80°C for 1h;

[0031] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain the carbon-based organic photovoltaic material indoor formaldehyde removal photocatalyst of the present invention, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based coconut shell carbon particles is 1:7500.

[0032] Under indoor lighting conditions, 50 mg of the photocatalyst obtained in this example was placed in a quartz reactor with a volume of 100 ml filled with formaldehyde gas. After 120 minutes of treatment, the removal rate was 98.3%. The removal effect and stability are shown in Figure 1 shown.

[0033] Example 2

[0034] The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material is carried out according to the following steps:

[0035] 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;

[0036] B. Grind the completely dried coconut shell with a grinder for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0037] C. Dry the coconut shell powder at 100°C for 30 minutes 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 down.

[0038] Bring to room temperature and pack in bags for later use;

[0039] D. Organic photovoltaic material PCE10:PC 71 BM 0.015g was mixed with chloroform 15ml to obtain an organic photocatalyst mixed solution, wherein PCE10:PC 71 BM is composed of PCE10 and PC 71 BM is mixed in a weight ratio of 1:1; during preparation, the organic photovoltaic material is mixed with chloroform and then stirred and dissolved at 80°C for 1 hour. E. The organic photocatalyst mixed solution obtained in step D is evenly coated on the modified carbon-based material coconut shell carbon particles.

[0040] The particles were then dried at 60° C. for 24 hours to obtain the carbon-based organic photovoltaic material indoor formaldehyde removal photocatalyst of the present invention, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles was 1:7500.

[0041] Under indoor lighting conditions, 50 mg of the photocatalyst obtained in this example was placed in a quartz reactor with a volume of 100 ml filled with formaldehyde gas. After 120 minutes of treatment, the removal rate was 99.1%.

[0042] Example 3

[0043] The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material is carried out according to the following steps:

[0044] 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;

[0045] B. Grind the completely dried coconut shell with a grinder for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0046] C. Dry the coconut shell powder at 100°C for 30 minutes and then put it into a tubular furnace for high-temperature pyrolysis 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 to

[0047] Room temperature, bag and set aside;

[0048] D. Organic photovoltaic material PCE10:PC 71 BM 0.02g was mixed with chloroform 20ml to obtain an organic photocatalyst mixed solution, wherein PCE10:PC 71 BM is composed of PCE10 and PC 71 BM is mixed in a weight ratio of 1:1; during preparation, the organic photovoltaic material is mixed with chloroform and then stirred and dissolved at 80°C for 1h;

[0049] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain the carbon-based organic photovoltaic material indoor formaldehyde removal photocatalyst of the present invention, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based coconut shell carbon particles is 1:7500.

[0050] Under indoor lighting conditions, 50 mg of the photocatalyst obtained in this example was placed in a quartz reactor with a volume of 100 ml filled with formaldehyde gas. After 120 minutes of treatment, the removal rate was 98.9%.

[0051] Example 4

[0052] The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material is carried out according to the following steps:

[0053] 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;

[0054] B. Grind the completely dried coconut shell with a grinder 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°C for 30 minutes and then put it into a tubular furnace for high-temperature pyrolysis 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 to

[0056] Room temperature, bag and set aside;

[0057] D. Organic photovoltaic material PCE10:PC 71 BM 0.02g was mixed with chloroform 20ml to obtain an organic photocatalyst mixed solution, wherein PCE10:PC 71 BM is composed of PCE10 and PC 71 BM is mixed in a weight ratio of 1:1; during preparation, the organic photovoltaic material is mixed with chloroform and then stirred and dissolved at 80°C for 1h;

[0058] E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain the carbon-based organic photovoltaic material indoor formaldehyde removal photocatalyst of the present invention, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based coconut shell carbon particles is 1:5000.

[0059] Under indoor lighting conditions, 50 mg of the photocatalyst obtained in this example was placed in a quartz reactor with a volume of 100 ml filled with formaldehyde gas. After 120 minutes of treatment, the removal rate was 99.5%.

[0060] Example 5

[0061] The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material is carried out according to the following steps:

[0062] 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;

[0063] B. Grind the completely dried coconut shell with a grinder for 3 to 5 minutes and then pass it through a 200-mesh sieve to obtain coconut shell powder;

[0064] C. Dry the coconut shell powder at 100°C for 30 minutes and then put it into a tubular furnace for high-temperature pyrolysis treatment to obtain modified carbon-based coconut shell carbon particles; during 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, then cool it to room temperature, and bag it for later use;

[0065] D. Organic photovoltaic material PTQ10:PC 71 BM 0.02g was mixed with chloroform 20ml to obtain an organic photocatalyst mixed solution, wherein PTQ10:PC 71 BM is composed of PTQ10 and PC 71 BM is mixed in a weight ratio of 1:1; during preparation, the organic photovoltaic material and chloroform are mixed and stirred to dissolve at 80°C for 1h; 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 24h to obtain the carbon-based organic photovoltaic material indoor formaldehyde photocatalyst of the present invention, wherein the weight ratio of the organic photocatalyst mixed solution to the modified carbon-based material coconut shell carbon particles is 1:10000.

[0066] Under indoor lighting conditions, 50 mg of the photocatalyst obtained in this example was placed in a quartz reactor with a volume of 100 ml filled with formaldehyde gas. After 120 minutes of treatment, the removal rate was 98.5%.

Claims

1. A method for preparing a carbon-based organic photovoltaic material-loaded photocatalyst for removing formaldehyde indoors, characterized in that: The method comprises the following steps: A. Clean the coconut shell and dry it until it is completely dry; B. Crushing the completely dried coconut shell with a pulverizer and passing it through a 200 mesh sieve to obtain coconut shell powder; C. Drying the coconut shell powder at 100° C. for 30 min and then placing it in a tubular furnace for high-temperature pyrolysis treatment to obtain modified carbon-based material coconut shell carbon particles; D. Mix the 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 PCE10:PC 71 BM or PTQ10:PC 71 BM; E. The organic photocatalyst mixed solution obtained in step D is uniformly coated on the modified carbon-based coconut shell carbon particles, and then dried at 60° C. for 24 hours to obtain a carbon-based organic photovoltaic material-loaded photocatalyst for removing formaldehyde indoors.

2. The method for preparing a photocatalyst for removing formaldehyde indoors using a carbon-based organic photovoltaic material according to claim 1 or 2, characterized in that: In step A, the drying process refers to placing the coconut shell in a forced air drying oven at a temperature of 70° C. and drying it for 48 hours.

3. The method for preparing a photocatalyst for removing formaldehyde indoors using a carbon-based organic photovoltaic material 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 formaldehyde indoors by using a carbon-based organic photovoltaic material as claimed in 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 formaldehyde indoors using a carbon-based organic photovoltaic material according to claim 1 or 2, characterized in that: In the 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 formaldehyde indoors using a carbon-based organic photovoltaic material according to claim 1 or 2, characterized in that: In step D, the PCE10:PC 71 BM, PTQ10:PC 71 BM are mixed in a weight ratio of 1:

1.

7. The method for preparing a photocatalyst for removing formaldehyde indoors by using a carbon-based organic photovoltaic material as claimed in claim 1 or 2, characterized in that: In the step D, during preparation, the organic photovoltaic material is mixed with chloroform and then stirred and dissolved at 80° C. for 1 hour.

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