Aluminum hydroxide loaded carbon quantum dot material for removing formaldehyde, gel and preparation method thereof

Abstract

The invention belongs to the technical field of indoor air pollution treatment, and particularly discloses an aluminum hydroxide loaded carbon quantum dot material for removing formaldehyde, gel and a preparation method of the aluminum hydroxide loaded carbon quantum dot material for removing formaldehyde, and the preparation method of the aluminum hydroxide loaded carbon quantum dot material comprises the following steps: uniformly mixing, grinding and dispersing amorphous aluminum hydroxide powder and basic amino acid; transferring into a microwave oven for microwave radiation reaction, filtering, washing and drying after the reaction is finished, and then crushing to obtain the aluminum hydroxide loaded carbon quantum dot material. The preparation method is simple in preparation process, short in reaction time and suitable for industrial production, and the prepared aluminum hydroxide loaded carbon quantum dot material and gel are high in formaldehyde removal rate and have long-term effectiveness.

Description

Technical Field

[0001] The invention belongs to the technical field of indoor air pollution control, relates to formaldehyde removal, and particularly relates to aluminum hydroxide loaded carbon quantum dot materials and gel for formaldehyde removal and a preparation method thereof. Background Art

[0002] Formaldehyde is a common pollutant in indoor air. It is genotoxic and carcinogenic, and seriously endangers human health. Therefore, removing indoor formaldehyde gas has been a research hotspot for many years.

[0003] At present, there are many methods for removing formaldehyde, such as physical adsorption and catalytic oxidation. Adsorption is the most common and effective method for treating formaldehyde pollution. It mainly uses porous materials such as activated carbon and diatomaceous earth to adsorb formaldehyde. After saturation, formaldehyde is released by heating and can be used again. It is cheap, simple and easy to use, but it has poor adsorption effect on formaldehyde and is easy to desorb and cause secondary pollution. Catalytic oxidation is a method of converting formaldehyde into harmless substances using photocatalysis, catalytic oxidation and thermal catalysis. Among them, photocatalyst catalyzes partial oxidation of formaldehyde under light conditions to generate carbon dioxide and water to remove formaldehyde, but it requires light and has more by-products; precious metal catalysts can completely oxidize formaldehyde at room temperature, but the cost is too high. Biological extractants and amino acids can also be used to remove formaldehyde. The principle of formaldehyde removal is that the amino group of amino acid compounds reacts with formaldehyde to generate hydroxymethyl derivatives and water. It has the advantages of fast formaldehyde removal, irreversible reaction, and no secondary pollution, but it has the disadvantages of fast adsorption saturation and poor long-term effectiveness.

[0004] Carbon quantum dots are a type of nanomaterial with a particle size of <10 nm. They are widely used in biology, analytical chemistry and other fields because of their large specific surface area, low toxicity and good water solubility. The surface of carbon quantum dots has abundant active groups, such as hydroxyl, carboxyl, epoxy, amino and the like. CN 114749149 B discloses a carbon material for formaldehyde purification and a preparation method thereof. Aloe leaves are used as raw materials, plant extracts are obtained by physical methods as carbon and nitrogen sources, dimethyl sulfoxide is used as a reducing agent and sulfur source, and sulfur-nitrogen co-doped graphene carbon quantum dot nanomaterials are synthesized by a solvothermal method in one step for formaldehyde adsorption experiments. It is found that the nanomaterial has a faster adsorption performance and a higher adsorption capacity for formaldehyde. The preparation process of this method is simple, but the solvothermal reaction needs to be maintained at 160-200°C for 8-15 hours, and the reaction time is long. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide aluminum hydroxide loaded carbon quantum dot materials, gels and preparation methods thereof for formaldehyde removal. The preparation process of the present invention is simple and the reaction time is short, which is suitable for industrial production. At the same time, the prepared aluminum hydroxide loaded carbon quantum dot materials and gels have high formaldehyde removal rates and long-lasting effectiveness.

[0006] The technical solution of the present invention is achieved in this way: The invention discloses a method for preparing aluminum hydroxide loaded carbon quantum dot material for formaldehyde removal, comprising the steps of mixing amorphous aluminum hydroxide powder and alkaline amino acid, grinding and dispersing the mixture evenly, transferring the mixture into a microwave oven for microwave radiation reaction, filtering, washing, drying and then crushing the mixture after the reaction is completed to obtain the aluminum hydroxide loaded carbon quantum dot material.

[0007] Furthermore, the amorphous aluminum hydroxide powder is prepared by the following method: placing an aluminum chloride solution in a reaction kettle, then dropping a sodium hydroxide solution under stirring conditions, heating to 30-50° C. after the dropping is completed, stirring and reacting for 1-3 hours, and then filtering, washing, drying and crushing to obtain the amorphous aluminum hydroxide powder.

[0008] Furthermore, the molar ratio of aluminum chloride to sodium hydroxide is 1:2.5~3.5.

[0009] Furthermore, the basic amino acid is one or more of arginine, lysine and histidine.

[0010] Furthermore, during the microwave radiation reaction, the microwave radiation power is 500-700 watts, and the reaction time is 5-20 min.

[0011] Furthermore, the mass ratio of amorphous aluminum hydroxide powder to basic amino acid is 20~50:1.

[0012] The present invention also provides an aluminum hydroxide loaded carbon quantum dot material for formaldehyde removal, which is prepared by the above-mentioned method for preparing the aluminum hydroxide loaded carbon quantum dot material for formaldehyde removal.

[0013] The present invention also provides a method for preparing a gel for removing formaldehyde, which specifically comprises the following steps: (1) dispersing a surfactant and the aforementioned aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal into deionized water to obtain a solution A; (2) Stirring the water-soluble polymer gelling agent and solution A uniformly at 80-100°C to obtain solution B; (3) Under stirring conditions, a moisturizer, a preservative, an antioxidant and a flavoring agent are sequentially added to the B solution, stirred evenly and then cooled to obtain the formaldehyde removal gel; The mass volume ratio of deionized water, aluminum hydroxide-loaded carbon quantum dot material, water-soluble polymer gelling agent, surfactant, moisturizing agent, preservative, antioxidant and flavoring agent is 100g:4~10g:1~5g:1~10mL:1~10mL:5~15mL:1~5mg:1~5mL.

[0014] Furthermore, the surfactant is alkyl polyglycoside APG0810 or APG0814; the water-soluble polymer gelling agent is methylcellulose, sodium carboxymethylcellulose, or hydroxypropyl methylcellulose; the moisturizing agent is one or more of ethylene glycol, propylene glycol, glycerol and sorbitol; the preservative is one or two of hydantoin and imidazolidinyl urea; the antioxidant is one or more of vitamin C, methionine and cysteine; the flavoring agent is aloe essential oil, rose essential oil, peppermint essential oil, gardenia essential oil, lavender essential oil or sweet orange essential oil.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses amorphous aluminum hydroxide as a carrier of carbon quantum dots. Amorphous aluminum hydroxide not only has the characteristics of microporous structure, large specific surface area, strong adsorption performance, etc., but also has a large number of hydroxyl groups on the surface of amorphous aluminum hydroxide, which are easy to react with the carboxyl groups of amino acids, increase the adsorption of basic amino acids, and thus help to increase the number of amino carbon quantum dots loaded on the surface of amorphous aluminum hydroxide; at the same time, amorphous aluminum hydroxide has good structural stability and does not react under microwave radiation. In addition, during the gel formation process, on the one hand, aluminum ions can coordinate with oxygen-containing functional groups in polymer gelling agents to form cross-linked compounds, and on the other hand, hydroxyl groups can form hydrogen bonds with oxygen-containing functional groups to further strengthen the effect between amorphous aluminum hydroxide and polymer gel, so that amorphous aluminum hydroxide acts as a bridging agent to stabilize the gel, and there is no need to add commonly used calcium salt bridging agents.

[0016] At the same time, the present invention uses basic amino acids as carbon sources and nitrogen sources. Basic amino acids are not only abundant in source and low in price, but also easy to polymerize under microwave radiation to obtain amino-rich carbon quantum dots, thereby loading a large number of amino carbon quantum dots on the surface of amorphous aluminum hydroxide.

[0017] 2. The present invention adopts microwave radiation to prepare aluminum hydroxide-loaded carbon quantum dot materials. Microwave radiation has the advantages of fast and uniform heating, which shortens the reaction time (the preparation of aluminum hydroxide-loaded carbon quantum dot materials can be completed in 5 to 20 minutes), and the amino carbon quantum dots loaded on the surface of aluminum hydroxide are evenly distributed. In addition, no solvent needs to be added during the reaction process. It is a green production process and is suitable for industrial production.

[0018] 3. When the aluminum hydroxide-loaded carbon quantum dot material and gel of the present invention are used to remove formaldehyde, the gel is a porous material that can effectively adsorb formaldehyde in the air. The adsorbed formaldehyde can react with the amino groups of the amino carbon quantum dots loaded on the surface of the amorphous aluminum hydroxide to generate substances such as hydroxymethyl derivatives and water that are harmless to the human body, with good biocompatibility, non-toxicity, and no secondary pollution, thereby achieving the purpose of safe formaldehyde removal. On the other hand, it can be captured and fixed by the amorphous aluminum hydroxide, reducing the loss of amino groups. Therefore, the gel and the amorphous aluminum hydroxide-loaded carbon quantum dot material promote each other in the synergistic effect of the two factors of physical adsorption of formaldehyde and chemical removal of formaldehyde, thereby jointly improving the long-term removal efficiency of formaldehyde.

[0019] 4. The gel prepared by the present invention is easy to transport, store and use, has a stable structure, and can remove formaldehyde in the air for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 -Macroscopic morphology of the amorphous aluminum hydroxide powder and aluminum hydroxide-loaded carbon quantum dot powder prepared in Example 1.

[0021] Figure 2 -Distribution diagram of aluminum, oxygen and nitrogen elements in the aluminum hydroxide-loaded carbon quantum dot powder prepared in Example 1.

[0022] Figure 3 - Macroscopic photograph of the gel prepared in Example 1. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1 1) Preparation of aluminum hydroxide-loaded carbon quantum dot powder Weigh a certain amount of aluminum chloride and sodium hydroxide and dissolve them in deionized water to prepare 1.0 mol / L aqueous solutions. Under stirring, gradually add the sodium hydroxide solution to the aluminum chloride solution, and a white precipitate is generated. The temperature is controlled at 30°C during the reaction. After the reaction is completed, centrifuge and wash, and the filter cake is placed in a 60°C drying oven to dry for 12 hours to obtain a white solid. After grinding and crushing, amorphous aluminum hydroxide powder is obtained and bagged for later use. Among them, Al 3+ and OH - The molar ratio is 1:3.5.

[0025] The obtained amorphous aluminum hydroxide powder and arginine were mixed, ground and dispersed uniformly, and then placed in a microwave oven for microwave radiation reaction for 5 minutes, with a microwave radiation power of 500 watts. The obtained mixture was filtered and washed, and the filter cake was placed in a 60°C drying oven for 12 hours to obtain a white solid, which was ground and crushed to obtain aluminum hydroxide-loaded carbon quantum dot powder. The mass ratio of the amorphous aluminum hydroxide powder to the arginine was 20:1.

[0026] 2) Preparation of aluminum hydroxide loaded carbon quantum dots for formaldehyde removal gel (1) Dispersing aluminum hydroxide-loaded carbon quantum dot powder and alkyl polyglycoside APG0810 in deionized water to obtain solution A for later use; (2) At 80°C, mix methyl cellulose and solution A and stir them evenly to obtain solution B for later use; (3) At 80°C, under stirring conditions, ethylene glycol, hydantoin, vitamin C, rose essential oil, etc. are added to solution B in sequence, and the mixture is stirred evenly. When the mixture is cooled to 50°C, the mixture is filled, cooled until the mixture is completely solidified, sealed, and packaged to obtain an aluminum hydroxide-loaded carbon quantum dot formaldehyde removal gel.

[0027] The mass volume ratio of deionized water, aluminum hydroxide-loaded carbon quantum dot powder, methyl cellulose, alkyl glycoside APG0810, ethylene glycol, hydantoin, vitamin C and flavoring agent is 100 g: 5 g: 3 g: 7 ml: 5 ml: 10 ml: 3 mg: 3 ml.

[0028] Example 2 1) Preparation of aluminum hydroxide-supported carbon quantum dot powder Weigh a certain amount of aluminum chloride and sodium hydroxide and dissolve them in deionized water to prepare 1.0 mol / L aqueous solutions. Under stirring, gradually add the sodium hydroxide solution to the aluminum chloride solution, and a white precipitate is generated. The temperature is controlled at 30°C during the reaction. After the reaction is completed, centrifuge and wash, and the filter cake is placed in a 60°C drying oven to dry for 12 hours to obtain a white solid. After grinding and crushing, amorphous aluminum hydroxide powder is obtained and bagged for later use. Among them, Al 3+ and OH - The molar ratio is 1:3.0.

[0029] The obtained amorphous aluminum hydroxide powder and lysine were mixed, ground and dispersed uniformly, and then placed in a microwave oven for microwave radiation reaction for 6 minutes, with a microwave radiation power of 600 watts. The obtained mixture was filtered and washed, and the filter cake was placed in a 60°C drying oven for 12 hours to obtain a white solid, which was ground and crushed to obtain aluminum hydroxide-loaded carbon quantum dot powder. The mass ratio of the amorphous aluminum hydroxide powder to lysine was 20:1.

[0030] 2) Preparation of aluminum hydroxide loaded carbon quantum dots for formaldehyde removal gel (1) Dispersing aluminum hydroxide-loaded carbon quantum dot powder and alkyl polyglycoside APG0814 in deionized water to obtain solution A for later use; (2) At 90°C, mix sodium carboxymethyl cellulose and solution A and stir until uniformly mixed to obtain solution B for later use; (3) At 90°C, under stirring conditions, add propylene glycol, imidazolidinyl urea, methionine and flavoring agent to solution B in sequence, stir evenly, cool to 50°C, fill, cool until completely solidified, seal and package to obtain aluminum hydroxide loaded carbon quantum dot formaldehyde removal gel.

[0031] The mass and volume ratios of deionized water, aluminum hydroxide-loaded carbon quantum dot powder, sodium carboxymethyl cellulose, alkyl glycoside APG0814, propylene glycol, imidazolidinyl urea, methionine and rose essential oil are 100 g: 7 g: 4 g: 8 ml: 6 ml: 8 ml: 4 mg: 4 ml.

[0032] Example 3 1) Preparation of aluminum hydroxide-supported carbon quantum dots Weigh a certain amount of aluminum chloride and sodium hydroxide and dissolve them in deionized water to prepare 1.0 mol / L aqueous solutions. Under stirring, gradually add the sodium hydroxide solution to the aluminum chloride solution, and a white precipitate is generated. The temperature is controlled at 30°C during the reaction. After the reaction is completed, centrifuge and wash, and the filter cake is placed in a 60°C drying oven to dry for 12 hours to obtain a white solid. After grinding and crushing, amorphous aluminum hydroxide powder is obtained and bagged for later use. Among them, Al 3+ and OH - The molar ratio is 1:2.5.

[0033] The obtained amorphous aluminum hydroxide powder and histidine were mixed, ground and dispersed uniformly, and then placed in a microwave oven for microwave radiation reaction for 8 minutes, with a microwave radiation power of 700 watts. The obtained mixture was filtered and washed, and the filter cake was placed in a 60°C drying oven for 12 hours to obtain a white solid, which was ground and crushed to obtain aluminum hydroxide-loaded carbon quantum dot powder. The mass ratio of the amorphous aluminum hydroxide powder to histidine was 20:1.

[0034] 2) Preparation of aluminum hydroxide loaded carbon quantum dots for formaldehyde removal gel (1) Dispersing aluminum hydroxide-loaded carbon quantum dot powder and alkyl polyglycoside APG0810 in deionized water to obtain solution A for later use; (2) Mix and stir the HPMC and solution A at 80°C to obtain solution B for later use; (3) At 80°C, under stirring conditions, propylene glycol, hydantoin, cysteine ​​and rose essential oil are added to solution B in sequence, and the mixture is stirred evenly. When the mixture is cooled to 50°C, the mixture is filled, cooled until the mixture is completely solidified, sealed and packaged to obtain an aluminum hydroxide-loaded carbon quantum dot formaldehyde removal gel.

[0035] The mass and volume ratios of deionized water, aluminum hydroxide-loaded carbon quantum dots, hydroxypropyl methylcellulose, alkyl glycoside APG0810, propylene glycol, hydantoin, cysteine ​​and flavoring agent are 100 g: 8 g: 5 g: 9 ml: 8 ml: 12 ml: 5 mg: 5 ml.

[0036] Example 4 1) Preparation of aluminum hydroxide-loaded carbon quantum dot powder Weigh a certain amount of aluminum chloride and sodium hydroxide and dissolve them in deionized water to prepare 1.0 mol / L aqueous solutions. Under stirring, gradually add the sodium hydroxide solution to the aluminum chloride solution, and a white precipitate is generated. The temperature is controlled at 30°C during the reaction. After the reaction is completed, centrifuge and wash, and the filter cake is placed in a 60°C drying oven to dry for 12 hours to obtain a white solid. After grinding and crushing, amorphous aluminum hydroxide powder is obtained and bagged for later use. Among them, Al 3+ and OH - The molar ratio is 1:2.75.

[0037] The obtained amorphous aluminum hydroxide powder and lysine were mixed, ground and dispersed uniformly, and then placed in a microwave oven for microwave radiation reaction for 10 minutes, with a microwave radiation power of 650 watts. The obtained mixture was filtered and washed, and the filter cake was placed in a 60°C drying oven for 12 hours to obtain a white solid, which was ground and crushed to obtain aluminum hydroxide-loaded carbon quantum dot powder. The mass ratio of the amorphous aluminum hydroxide powder to lysine was 30:1.

[0038] 2) Preparation of aluminum hydroxide loaded carbon quantum dots for formaldehyde removal gel (1) Dispersing aluminum hydroxide-loaded carbon quantum dot powder and alkyl polyglycoside APG0814 in deionized water to obtain solution A for later use; (2) Mix and stir the HPMC and phase A at 80°C to obtain solution B for later use; (3) At 80°C, under stirring conditions, add sorbitol, imidazolidinyl urea, methionine and flavoring agent to solution B in sequence, stir evenly, cool to 50°C, fill, cool until completely solidified, seal and package to obtain aluminum hydroxide loaded carbon quantum dot formaldehyde removal gel.

[0039] The mass and volume ratios of deionized water, aluminum hydroxide-loaded carbon quantum dot powder, hydroxypropyl methylcellulose, alkyl glycoside APG0814, sorbitol, imidazolidinyl urea, vitamin C and rose essential oil are 100 g: 10 g: 5 g: 9 ml: 9 ml: 15 ml: 4 mg: 4 ml.

[0040] Comparative Example 1 The difference between this comparative example and Example 4 is that microwave-irradiated amorphous aluminum hydroxide is used instead of aluminum hydroxide-loaded carbon quantum dot powder.

[0041] Comparative Example 2 The difference between this comparative example and Example 4 is that carbon quantum dots are used instead of aluminum hydroxide-loaded carbon quantum dot powder, wherein the preparation conditions of the carbon quantum dots are the same as those in Example 4, that is, the same mass of lysine is irradiated and reacted in a microwave with a power of 650 watts for 10 minutes.

[0042] 1. The microscopic morphology of the amorphous aluminum hydroxide powder and aluminum hydroxide loaded carbon quantum dot powder prepared in Example 1 is as follows: Figure 1 As shown, Figure 1 On the left is amorphous aluminum hydroxide powder, and on the right is aluminum hydroxide loaded with carbon quantum dots powder. As can be seen from the figure, amorphous aluminum hydroxide and aluminum hydroxide loaded with carbon quantum dots are both white powders with no obvious difference in appearance, and the color is slightly darker after loading.

[0043] At the same time, the distribution diagram of aluminum, oxygen and nitrogen elements in aluminum hydroxide loaded carbon quantum dot powder is as follows Figure 2 As shown in the figure, it can be seen that aluminum, oxygen and nitrogen are all in a uniformly dispersed state, and the nitrogen element all comes from the carbon quantum dots, indicating that the amino carbon quantum dots are uniformly loaded on the surface of the amorphous aluminum hydroxide powder.

[0044] The macroscopic photograph of the prepared gel is shown in Figure 3 As shown in the figure, it can be seen that the gel is solid at room temperature and its color is light yellow.

[0045] 2. Weigh 100 g of the aluminum hydroxide-loaded carbon quantum dot formaldehyde removal gel of Examples 1 to 4 and Comparative Examples 1 to 2 respectively, make a cylinder with a diameter of 6 cm and place it in a 1.5 m 3 In the test chamber, formaldehyde concentrations were tested after 240, 360, 720, and 840 hours, and the formaldehyde removal rate was calculated, where removal rate = [(initial concentration - measured concentration) / initial concentration] × 100%.

[0046] It can be seen from the above table that as time goes by, the formaldehyde concentration in the four embodiments can be significantly reduced, indicating that the aluminum hydroxide loaded carbon quantum dot formaldehyde removal gel can effectively remove formaldehyde, and the differences among the embodiments are not much. Although the two comparative examples can also reduce the formaldehyde concentration, it is significantly lower than the embodiments, indicating that the gel and amorphous aluminum hydroxide loaded carbon quantum dot material synergistically promote each other in the two factors of physical adsorption of formaldehyde and chemical removal of formaldehyde, and jointly improve the long-term removal efficiency of formaldehyde.

[0047] Finally, it should be noted that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes and modifications can be made based on the above description. It is impossible to list all implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for preparing a carbon quantum dot material loaded with aluminum hydroxide for formaldehyde removal, characterized in that: The amorphous aluminum hydroxide powder and the alkaline amino acid are mixed, ground and dispersed uniformly, and then transferred to a microwave oven for microwave radiation reaction. After the reaction is completed, the mixture is filtered, washed, dried, and then crushed to obtain the aluminum hydroxide-loaded carbon quantum dot material.

2. The method for preparing the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to claim 1, characterized in that: The amorphous aluminum hydroxide powder is prepared by the following method: placing an aluminum chloride solution in a reaction kettle, then dropping a sodium hydroxide solution under stirring conditions, heating to 30-50° C. after the dropping is completed, stirring and reacting for 1-3 hours, and then filtering, washing, drying and crushing to obtain the amorphous aluminum hydroxide powder.

3. The method for preparing the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to claim 2, characterized in that: The molar ratio of aluminum chloride to sodium hydroxide is 1:2.5~3.

5.

4. The method for preparing the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to claim 1, characterized in that: The basic amino acid is one or more of arginine, lysine and histidine.

5. The method for preparing the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to claim 1, characterized in that: During the microwave radiation reaction, the microwave radiation power is 500-700 watts, and the reaction time is 5-20 min.

6. The method for preparing the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to any one of claims 1 to 5, characterized in that: The mass ratio of amorphous aluminum hydroxide powder to basic amino acid is 20-50:

1.

7. Aluminum hydroxide loaded carbon quantum dot material for formaldehyde removal, characterized in that: The material is prepared by the method for preparing the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to any one of claims 1 to 6.

8. A method for preparing a gel for removing formaldehyde, characterized in that: The specific steps include: (1) dispersing a surfactant and the aluminum hydroxide-loaded carbon quantum dot material for formaldehyde removal according to claim 7 into deionized water to obtain a solution A; (2) Stirring the water-soluble polymer gelling agent and solution A uniformly at 80-100°C to obtain solution B; (3) Under stirring conditions, a moisturizer, a preservative, an antioxidant and a flavoring agent are sequentially added to the solution B, stirred evenly and then cooled to obtain the formaldehyde removal gel; The mass volume ratio of deionized water, aluminum hydroxide-loaded carbon quantum dot material, water-soluble polymer gelling agent, surfactant, moisturizing agent, preservative, antioxidant and flavoring agent is 100g:4~10g:1~5g:1~10mL:1~10mL:5~15mL:1~5mg:1~5mL.

9. The method for preparing the formaldehyde removal gel according to claim 8, characterized in that: The surfactant is alkyl polyglycoside APG0810 or APG0814; the water-soluble polymer gelling agent is methylcellulose, sodium carboxymethylcellulose, or hydroxypropyl methylcellulose; the moisturizing agent is one or more of ethylene glycol, propylene glycol, glycerol and sorbitol; the preservative is one or two of hydantoin and imidazolidinyl urea; the antioxidant is one or more of vitamin C, methionine and cysteine; the flavoring agent is aloe essential oil, rose essential oil, peppermint essential oil, gardenia essential oil, lavender essential oil or sweet orange essential oil.

10. A gel for removing formaldehyde, characterized in that: The formaldehyde removal gel is prepared by the method for preparing the formaldehyde removal gel according to claim 8 or 9.

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