Neutral negative oxygen ion aqueous solution as well as preparation method and application thereof

Abstract

The invention relates to the technical field of negative oxygen ions, and discloses a neutral negative oxygen ion aqueous solution as well as a preparation method and application thereof. The neutral negative oxygen ion aqueous solution comprises the following raw materials in parts by mass: 80-100 parts of water, 10-20 parts of a plant extracting agent, 5-10 parts of thorium nitrate, 3-5 parts of inorganic nano silicon, 2-3 parts of citric acid, 2-3 parts of ascorbic acid, 1-2 parts of tea polyphenol and 1-2 parts of graphene oxide. The neutral negative oxygen ion aqueous solution provided by the invention can release high-concentration negative oxygen ions, and can effectively improve the content of indoor negative oxygen ions; the neutral negative oxygen ion aqueous solution provided by the invention is stable and long in negative oxygen ion release time, and can keep high negative oxygen ion content indoors for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of negative oxygen ions, and in particular to a neutral negative oxygen ion aqueous solution and a preparation method and application thereof. Background Art

[0002] Negative oxygen ions, i.e. oxygen ions with negative charges, are formed when oxygen molecules obtain one or more electrons and are known as "vitamins in the air". Negative oxygen ions have many functions and effects, including improving sleep quality, enhancing immunity, promoting metabolism, relieving pain, improving cardiopulmonary function, regulating the central nervous system, improving lung function, air purification, promoting plant growth, improving indoor environmental quality, promoting the activity of water molecules, and improving the quality of textiles. Under natural conditions, the content of negative oxygen ions in the air is high, but in some specific places, such as closed rooms and industrial areas, the content of negative oxygen ions is low. Therefore, applying a certain amount of negative oxygen ion aqueous solution has become an important means to increase the content of negative oxygen ions in some specific places.

[0003] However, existing negative oxygen ion aqueous solutions are mostly acidic, have poor stability, and a short negative oxygen ion release time. Therefore, providing a stable neutral negative oxygen ion aqueous solution that releases negative oxygen ions for a long time has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a neutral negative oxygen ion aqueous solution and a preparation method and application thereof. The neutral negative oxygen ion aqueous solution is stable and releases negative oxygen ions for a long time.

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

[0006] One of the technical solutions of the present invention:

[0007] A neutral negative oxygen ion aqueous solution comprises the following raw materials in parts by weight: 80-100 parts of water, 10-20 parts of plant extract, 5-10 parts of thorium nitrate, 3-5 parts of inorganic nano silicon, 2-3 parts of citric acid, 2-3 parts of ascorbic acid, 1-2 parts of tea polyphenols and 1-2 parts of graphene oxide.

[0008] Preferably, the neutral negative oxygen ion aqueous solution comprises the following raw materials in parts by mass: 90 parts of water, 15 parts of plant extract, 7 parts of thorium nitrate, 4 parts of inorganic nano-silicon, 2.5 parts of citric acid, 2.5 parts of ascorbic acid, 1.5 parts of tea polyphenols and 1.5 parts of graphene oxide.

[0009] Furthermore, the preparation method of the plant extract comprises the following steps:

[0010] 1) mixing and grinding aloe vera, cactus, chrysanthemum, lavender and sage to obtain a plant mixture;

[0011] 2) adding the plant mixture obtained in step 1) into water for extraction to obtain the plant extract.

[0012] Furthermore, in step 1), the mass ratio of aloe vera, cactus, chrysanthemum, lavender and sage is (3-5):(2-3):(2-3):1:1.

[0013] Furthermore, in step 1), the grinding is: grinding through a 40-mesh sieve.

[0014] Furthermore, in step 2), the solid-liquid ratio of the plant mixture to water is 1 g:30 mL.

[0015] Furthermore, in step 2), the leaching is: leaching at 60-80° C. for 2-4 hours.

[0016] The second technical solution of the present invention:

[0017] The method for preparing the neutral negative oxygen ion aqueous solution comprises the following steps:

[0018] 1) adding graphene oxide to water, heating and stirring to dissolve, to obtain a graphene oxide solution;

[0019] 2) adding a plant extract and thorium nitrate to the graphene oxide solution obtained in step 1), stirring, and obtaining a premixed solution A;

[0020] 3) adding inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols to the premixed solution A obtained in step 2), stirring to obtain a premixed solution B;

[0021] 4) Adding a pure alkali aqueous solution to the premixed solution B obtained in step 3) and adjusting the pH to 6.5-7 to obtain the neutral negative oxygen ion aqueous solution.

[0022] Furthermore, in step 1), the heating and stirring dissolution is as follows: controlling the stirring speed to 60-120 r / min, heating and stirring at 50-60° C. until the graphene oxide is completely dissolved.

[0023] Furthermore, in step 2), the stirring is: controlling the stirring speed to 10 to 20 r / min, and stirring at room temperature for 30 to 60 min.

[0024] Furthermore, in step 3), the stirring is: controlling the stirring speed to 60-120 r / min, and stirring at room temperature for 2-3 h.

[0025] Furthermore, in step 4), the mass fraction of the soda ash aqueous solution is 8% to 12%.

[0026] The third technical solution of the present invention:

[0027] The application of the above neutral negative oxygen ion aqueous solution in air purification.

[0028] The fourth technical solution of the present invention:

[0029] The application of the above neutral negative oxygen ion aqueous solution in promoting the activity of water molecules.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The neutral negative oxygen ion aqueous solution provided by the present invention can release negative oxygen ions at a relatively high concentration, and can effectively increase the negative oxygen ion content indoors;

[0032] The neutral negative oxygen ion aqueous solution provided by the present invention is stable and releases negative oxygen ions for a long time, and can maintain a high negative oxygen ion content indoors for a long time. DETAILED DESCRIPTION

[0033] Now, various exemplary embodiments of the present invention are described in detail, and this detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, characteristics and embodiments of the present invention. It should be understood that the terms described in the present invention are only for describing specific embodiments and are not used to limit the present invention.

[0034] In addition, for the numerical range in the present invention, it is understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0035] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0036] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to the skilled artisan. The present invention description and examples are exemplary only.

[0037] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0038] In the following examples and comparative examples, all the raw materials used were commercially available.

[0039] In the following examples and comparative examples, the room temperature is 25±2°C.

[0040] In the following embodiments, a method for preparing a neutral negative oxygen ion aqueous solution comprises the following steps:

[0041] 1) mixing aloe vera, cactus, chrysanthemum, lavender and sage in a mass ratio of (3-5) : (2-3) : (2-3) : 1: 1, and grinding the mixture through a 40-mesh sieve to obtain a plant mixture;

[0042] 2) adding the plant mixture obtained in step 1) into water, controlling the solid-liquid ratio to be 1 g:30 mL, and extracting at 60-80° C. for 2-4 hours to obtain a plant extract;

[0043] 3) Weigh the following raw materials in parts by mass: 80-100 parts of water, 10-20 parts of plant extract, 5-10 parts of thorium nitrate, 3-5 parts of inorganic nano-silicon, 2-3 parts of citric acid, 2-3 parts of ascorbic acid, 1-2 parts of tea polyphenols and 1-2 parts of graphene oxide;

[0044] 4) adding the graphene oxide weighed in step 3) to the water weighed in step 3), controlling the stirring speed to 60-120 r / min, heating and stirring at 50-60° C. until the graphene oxide is completely dissolved, to obtain a graphene oxide solution;

[0045] 5) adding the plant extract and thorium nitrate weighed in step 3) to the graphene oxide solution obtained in step 4), controlling the stirring speed to 10-20 r / min, stirring at room temperature for 30-60 min, and obtaining a premixed solution A;

[0046] 6) Adding the inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols weighed in step 3) to the premix A obtained in step 5), controlling the stirring speed to 60-120 r / min, stirring at room temperature for 2-3 hours, to obtain a premix B;

[0047] 7) Add 8% to 12% by mass of pure alkali aqueous solution to the premixed solution B obtained in step 6), adjust the pH to 6.5 to 7, and obtain the neutral negative oxygen ion aqueous solution.

[0048] Example 1

[0049] A neutral negative oxygen ion aqueous solution

[0050] 1) mixing aloe vera, cactus, chrysanthemum, lavender and sage in a mass ratio of 3:2:2:1:1, grinding and passing through a 40-mesh sieve to obtain a plant mixture;

[0051] 2) adding the plant mixture obtained in step 1) into water, controlling the solid-liquid ratio to be 1 g:30 mL, and extracting at 60° C. for 2 h to obtain a plant extract;

[0052] 3) Weigh the following raw materials in parts by mass: 80 parts of water, 10 parts of plant extract, 5 parts of thorium nitrate, 3 parts of inorganic nano-silicon, 2 parts of citric acid, 2 parts of ascorbic acid, 1 part of tea polyphenols and 1 part of graphene oxide;

[0053] 4) adding the graphene oxide weighed in step 3) to the water weighed in step 3), controlling the stirring speed to 60 r / min, heating and stirring at 50° C. until the graphene oxide is completely dissolved, to obtain a graphene oxide solution;

[0054] 5) adding the plant extract and thorium nitrate weighed in step 3) to the graphene oxide solution obtained in step 4), controlling the stirring speed to 10 r / min, and stirring at room temperature for 30 min to obtain a premixed solution A;

[0055] 6) Adding the inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols weighed in step 3) to the premix A obtained in step 5), controlling the stirring speed to 60 r / min, stirring at room temperature for 2 h, to obtain a premix B;

[0056] 7) Add 8% by mass of pure alkali aqueous solution to the premixed solution B obtained in step 6), adjust the pH to 6.5-7, and obtain the neutral negative oxygen ion aqueous solution.

[0057] Example 2

[0058] A neutral negative oxygen ion aqueous solution

[0059] 1) mixing aloe vera, cactus, chrysanthemum, lavender and sage in a mass ratio of 4:2.5:2.5:1:1, grinding and passing through a 40-mesh sieve to obtain a plant mixture;

[0060] 2) adding the plant mixture obtained in step 1) into water, controlling the solid-liquid ratio to be 1 g:30 mL, and extracting at 70° C. for 3 h to obtain a plant extract;

[0061] 3) Weigh the following raw materials in parts by mass: 90 parts of water, 15 parts of plant extract, 7 parts of thorium nitrate, 4 parts of inorganic nano-silicon, 2.5 parts of citric acid, 2.5 parts of ascorbic acid, 1.5 parts of tea polyphenols and 1.5 parts of graphene oxide;

[0062] 4) adding the graphene oxide weighed in step 3) to the water weighed in step 3), controlling the stirring speed to 90 r / min, heating and stirring at 55° C. until the graphene oxide is completely dissolved, to obtain a graphene oxide solution;

[0063] 5) adding the plant extract and thorium nitrate weighed in step 3) to the graphene oxide solution obtained in step 4), controlling the stirring speed to 15 r / min, stirring at room temperature for 45 min, and obtaining a premixed solution A;

[0064] 6) Adding the inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols weighed in step 3) to the premix A obtained in step 5), controlling the stirring speed to 90 r / min, stirring at room temperature for 2.5 h, to obtain a premix B;

[0065] 7) Add 10% by mass of pure alkali aqueous solution to the premixed solution B obtained in step 6), adjust the pH to 6.5-7, and obtain the neutral negative oxygen ion aqueous solution.

[0066] Example 3

[0067] A neutral negative oxygen ion aqueous solution

[0068] 1) mixing aloe vera, cactus, chrysanthemum, lavender and sage in a mass ratio of 5:3:3:1:1, grinding and passing through a 40-mesh sieve to obtain a plant mixture;

[0069] 2) adding the plant mixture obtained in step 1) into water, controlling the solid-liquid ratio to be 1 g:30 mL, and extracting at 80° C. for 4 h to obtain a plant extract;

[0070] 3) Weigh the following raw materials in parts by mass: 100 parts of water, 20 parts of plant extract, 10 parts of thorium nitrate, 5 parts of inorganic nano-silicon, 3 parts of citric acid, 3 parts of ascorbic acid, 2 parts of tea polyphenols and 2 parts of graphene oxide;

[0071] 4) adding the graphene oxide weighed in step 3) to the water weighed in step 3), controlling the stirring speed to 120 r / min, heating and stirring at 60° C. until the graphene oxide is completely dissolved, to obtain a graphene oxide solution;

[0072] 5) adding the plant extract and thorium nitrate weighed in step 3) to the graphene oxide solution obtained in step 4), controlling the stirring speed to 20 r / min, and stirring at room temperature for 60 min to obtain a premixed solution A;

[0073] 6) Adding the inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols weighed in step 3) to the premix A obtained in step 5), controlling the stirring speed to 120 r / min, stirring at room temperature for 3 h, to obtain a premix B;

[0074] 7) Add 12% by mass of pure alkali aqueous solution to the premixed solution B obtained in step 6), adjust the pH to 6.5-7, and obtain the neutral negative oxygen ion aqueous solution.

[0075] 5 mL of the neutral negative oxygen ion aqueous solution prepared in Examples 1 to 3 was sprayed on the surface of the lightweight brick, and then the lightweight brick sprayed with the neutral negative oxygen ion aqueous solution was placed in a volume of 1 m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 1.

[0076] Table 1 Negative oxygen ion concentration (pcs / cm 3 )

[0077]

[0078] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0079] It can be seen from the data in Table 1 that the neutral negative oxygen ion aqueous solution provided by the present invention can release a relatively high concentration of negative oxygen ions, and can effectively increase the indoor negative oxygen ion content;

[0080] The lightweight bricks sprayed with the neutral negative oxygen ion aqueous solution were placed in an aging test box for high temperature aging. The lightweight bricks were taken out on the 10th, 20th and 30th days of aging and placed in a 1m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 2.

[0081] Table 2 Negative oxygen ion concentration (pcs / cm 3 )

[0082]

[0083] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0084] It can be seen from the data in Table 2 that the neutral negative oxygen ion aqueous solution provided by the present invention is stable and releases negative oxygen ions for a long time, and can maintain a high negative oxygen ion content indoors for a long time.

[0085] Comparative Example 1

[0086] A neutral negative oxygen ion aqueous solution

[0087] The same as Example 2, except that step 1) is: according to the mass ratio of cactus, chrysanthemum, lavender and sage being 2.5:2.5:1:1, cactus, chrysanthemum, lavender and sage are mixed, and ground through a 40-mesh sieve to obtain a plant mixture.

[0088] Comparative Example 2

[0089] A neutral negative oxygen ion aqueous solution

[0090] The same as Example 2, except that step 1) is: according to the mass ratio of aloe vera, chrysanthemum, lavender and sage being 4:2.5:1:1, aloe vera, chrysanthemum, lavender and sage are mixed, and ground through a 40-mesh sieve to obtain a plant mixture.

[0091] Comparative Example 3

[0092] A neutral negative oxygen ion aqueous solution

[0093] The same as Example 2, except that step 1) is: according to the mass ratio of aloe vera, cactus, lavender and sage being 4:2.5:1:1, aloe vera, cactus, lavender and sage are mixed, and ground through a 40-mesh sieve to obtain a plant mixture.

[0094] Comparative Example 4

[0095] A neutral negative oxygen ion aqueous solution

[0096] The same as Example 2, except that step 1) is: according to the mass ratio of aloe vera, cactus, chrysanthemum and sage being 4:2.5:2.5:1, aloe vera, cactus, chrysanthemum and sage are mixed, and ground through a 40-mesh sieve to obtain a plant mixture.

[0097] Comparative Example 5

[0098] A neutral negative oxygen ion aqueous solution

[0099] The same as Example 2, except that step 1) is: according to the mass ratio of aloe vera, cactus, chrysanthemum and lavender being 4:2.5:2.5:1, aloe vera, cactus, chrysanthemum and lavender are mixed, and ground through a 40-mesh sieve to obtain a plant mixture.

[0100] 5 mL of the neutral negative oxygen ion aqueous solution prepared in Comparative Examples 1 to 5 was sprayed on the surface of the lightweight brick, and then the lightweight brick sprayed with the neutral negative oxygen ion aqueous solution was placed in a volume of 1 m 3The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 3.

[0101] Table 3 Negative oxygen ion concentration (pcs / cm 3 )

[0102]

[0103] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0104] From the data in Table 3, it can be seen that omitting any raw material plant in the plant extract will lead to a decrease in the concentration of negative oxygen ions to varying degrees;

[0105] The lightweight bricks sprayed with the neutral negative oxygen ion aqueous solution were placed in an aging test box for high temperature aging. The lightweight bricks were taken out on the 10th, 20th and 30th days of aging and placed in a 1m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 4.

[0106] Table 4 Negative oxygen ion concentration (pcs / cm 3 )

[0107]

[0108]

[0109] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0110] It can be seen from the data in Table 4 that omitting any raw material plant in the plant extract will lead to a decrease in the stability of the neutral negative oxygen ion aqueous solution to varying degrees.

[0111] Comparative Example 6

[0112] A neutral negative oxygen ion aqueous solution

[0113] 1) mixing aloe vera, cactus, chrysanthemum, lavender and sage in a mass ratio of 4:2.5:2.5:1:1, grinding and passing through a 40-mesh sieve to obtain a plant mixture;

[0114] 2) adding the plant mixture obtained in step 1) into water, controlling the solid-liquid ratio to be 1 g:30 mL, and extracting at 70° C. for 3 h to obtain a plant extract;

[0115] 3) Weigh the following raw materials in parts by mass: 90 parts of water, 15 parts of plant extract, 7 parts of thorium nitrate, 4 parts of inorganic nano-silicon, 2.5 parts of citric acid, 2.5 parts of ascorbic acid and 1.5 parts of tea polyphenols;

[0116] 4) adding the plant extract and thorium nitrate weighed in step 3) to the water weighed in step 3), controlling the stirring speed to 15 r / min, stirring at room temperature for 45 min, to obtain a premix A;

[0117] 5) adding the inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols weighed in step 3) to the premix A obtained in step 4), controlling the stirring speed to 90 r / min, stirring at room temperature for 2.5 h, to obtain a premix B;

[0118] 6) Add 10% by mass of pure alkali aqueous solution to the premixed solution B obtained in step 5), adjust the pH to 6.5-7, and obtain the neutral negative oxygen ion aqueous solution.

[0119] Comparative Example 7

[0120] A neutral negative oxygen ion aqueous solution

[0121] The same as Example 2, except that the addition of inorganic nano-silicon is omitted.

[0122] Comparative Example 8

[0123] A neutral negative oxygen ion aqueous solution

[0124] Same as Example 2, except that the addition of citric acid is omitted.

[0125] Comparative Example 9

[0126] A neutral negative oxygen ion aqueous solution

[0127] Same as Example 2, except that the addition of ascorbic acid is omitted.

[0128] Comparative Example 10

[0129] A neutral negative oxygen ion aqueous solution

[0130] Same as Example 2, except that the addition of tea polyphenols is omitted.

[0131] 5 mL of the neutral negative oxygen ion aqueous solution prepared in Comparative Examples 6 to 10 was sprayed on the surface of the lightweight brick, and then the lightweight brick sprayed with the neutral negative oxygen ion aqueous solution was placed in a volume of 1 m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 5.

[0132] Table 5 Negative oxygen ion concentration (pcs / cm3 )

[0133]

[0134] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0135] It can be seen from the data in Table 5 that omitting any raw material in the neutral negative oxygen ion aqueous solution will lead to a decrease in the concentration of negative oxygen ions to varying degrees;

[0136] The lightweight bricks sprayed with the neutral negative oxygen ion aqueous solution were placed in an aging test box for high temperature aging. The lightweight bricks were taken out on the 10th, 20th and 30th days of aging and placed in a 1m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 6.

[0137] Table 6 Negative oxygen ion concentration (pcs / cm 3 )

[0138]

[0139]

[0140] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0141] It can be seen from the data in Table 6 that omitting any raw material in the neutral negative oxygen ion aqueous solution will lead to a decrease in the stability of the neutral negative oxygen ion aqueous solution to varying degrees.

[0142] Comparative Example 11

[0143] A neutral negative oxygen ion aqueous solution

[0144] 1) mixing aloe vera, cactus, chrysanthemum, lavender and sage in a mass ratio of 4:2.5:2.5:1:1, grinding and passing through a 40-mesh sieve to obtain a plant mixture;

[0145] 2) adding the plant mixture obtained in step 1) into water, controlling the solid-liquid ratio to be 1 g:30 mL, and extracting at 70° C. for 3 h to obtain a plant extract;

[0146] 3) Weigh the following raw materials in parts by mass: 90 parts of water, 15 parts of plant extract, 7 parts of thorium nitrate, 4 parts of inorganic nano-silicon, 2.5 parts of citric acid, 2.5 parts of ascorbic acid, 1.5 parts of tea polyphenols and 1.5 parts of graphene oxide;

[0147] 4) adding the plant extract, thorium nitrate, inorganic nano-silicon, citric acid, ascorbic acid, tea polyphenols and graphene oxide weighed in step 3) to the water weighed in step 3), stirring at a speed of 90 r / min, stirring at room temperature for 4 hours, then adding a 10% by mass aqueous solution of soda ash, adjusting the pH to 6.5-7, to obtain the neutral negative oxygen ion aqueous solution.

[0148] 5 mL of the neutral negative oxygen ion aqueous solution prepared in Comparative Example 11 was sprayed on the surface of the lightweight brick, and then the lightweight brick sprayed with the neutral negative oxygen ion aqueous solution was placed in a 1 m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 7.

[0149] Table 7 Negative oxygen ion concentration (pcs / cm 3 )

[0150]

[0151]

[0152] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0153] It can be seen from the data in Table 7 that adding the various raw materials in the neutral negative oxygen ion aqueous solution at the same time will lead to a decrease in the concentration of negative oxygen ions;

[0154] The lightweight bricks sprayed with the neutral negative oxygen ion aqueous solution were placed in an aging test box for high temperature aging. The lightweight bricks were taken out on the 10th, 20th and 30th days of aging and placed in a 1m 3 The negative oxygen ion concentration in the sealed container was tested 10 times in parallel. The test results are shown in Table 8.

[0155] Table 8 Negative oxygen ion concentration (pcs / cm 3 )

[0156]

[0157] Note: The concentration of negative oxygen ions is calculated as the average value of 10 test results;

[0158] It can be seen from the data in Table 8 that adding the various raw materials in the neutral negative oxygen ion aqueous solution at the same time will lead to a decrease in the stability of the neutral negative oxygen ion aqueous solution.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A neutral negative oxygen ion aqueous solution, characterized in that: The invention comprises the following raw materials in parts by weight: 80-100 parts of water, 10-20 parts of plant extract, 5-10 parts of thorium nitrate, 3-5 parts of inorganic nano silicon, 2-3 parts of citric acid, 2-3 parts of ascorbic acid, 1-2 parts of tea polyphenols and 1-2 parts of graphene oxide.

2. A neutral negative oxygen ion aqueous solution according to claim 1, characterized in that: The preparation method of the plant extract comprises the following steps: 1) mixing and grinding aloe vera, cactus, chrysanthemum, lavender and sage to obtain a plant mixture; 2) adding the plant mixture obtained in step 1) into water for extraction to obtain the plant extract.

3. A neutral negative oxygen ion aqueous solution according to claim 2, characterized in that: In step 1), the mass ratio of aloe vera, cactus, chrysanthemum, lavender and sage is (3-5):(2-3):(2-3):1:

1.

4. A neutral negative oxygen ion aqueous solution according to claim 2, characterized in that: In step 2), the solid-liquid ratio of the plant mixture to water is 1 g: 30 mL; and the extraction is performed at 60-80° C. for 2-4 hours.

5. A method for preparing a neutral negative oxygen ion aqueous solution as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: 1) adding graphene oxide to water, heating and stirring to dissolve, to obtain a graphene oxide solution; 2) adding a plant extract and thorium nitrate to the graphene oxide solution obtained in step 1), stirring, and obtaining a premixed solution A; 3) adding inorganic nano-silicon, citric acid, ascorbic acid and tea polyphenols to the premixed solution A obtained in step 2), stirring to obtain a premixed solution B; 4) Adding a pure alkali aqueous solution to the premixed solution B obtained in step 3) and adjusting the pH to 6.5-7 to obtain the neutral negative oxygen ion aqueous solution.

6. The preparation method according to claim 4, characterized in that: In step 1), the heating and stirring dissolution is as follows: controlling the stirring speed to 60-120 r / min, heating and stirring at 50-60° C. until the graphene oxide is completely dissolved; in step 2), the stirring is as follows: controlling the stirring speed to 10-20 r / min, stirring at room temperature for 30-60 min; in step 3), the stirring is as follows: controlling the stirring speed to 60-120 r / min, stirring at room temperature for 2-3 h; in step 4), the mass fraction of the soda ash aqueous solution is 8%-12%.

7. Use of the neutral negative oxygen ion aqueous solution as described in any one of claims 1 to 4 in air purification.

8. Use of the neutral negative oxygen ion aqueous solution as described in any one of claims 1 to 4 in promoting the activity of water molecules.

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