CN112369422B - Graphene oxide-trichloroisocyanuric acid compound, preparation method and application - Google Patents
Graphene oxide-trichloroisocyanuric acid compound, preparation method and application Download PDFInfo
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Abstract
The invention discloses a graphene oxide-trichloroisocyanuric acid compound, a preparation method and application, belonging to the technical field of disinfectants, wherein the preparation method comprises the following steps: preparing graphite oxide powder by improving a Hummer method; dispersing graphite oxide powder in DMF, and performing ultrasonic treatment; adding trichloroisocyanuric acid, 4-dimethylaminopyridine and dicyclohexylcarbodiimide, magnetically stirring at 55-65 ℃ for 1-3 hours, centrifuging, removing supernatant, and leaving a layer of solid; dispersing the lower layer solid in deionized water, adding trichloroisocyanuric acid, and magnetically stirring for 5-7 h at 45-55 ℃; washing the product with deionized water in a vacuum filtration mode; and pre-freezing at low temperature, and then freeze-drying and grinding to obtain the graphene oxide-trichloroisocyanuric acid compound. The compound is used as a disinfectant, and can increase the bactericidal effect of trichloroisocyanuric acid, thereby generating a synergistic effect.
Description
Technical Field
The invention relates to the technical field of disinfectants, and particularly relates to a graphene oxide-trichloroisocyanuric acid compound, a preparation method and application thereof.
Background
Trichloroisocyanuric acid is a chloramine-type broad-spectrum, high-efficiency, quick and novel disinfectant, and compared with traditional chlorinating agents (such as liquid chlorine, bleaching powder and bleaching powder), the trichloroisocyanuric acid has the characteristics of high available chlorine content, stable storage and transportation, convenience in forming and use, high sterilizing and bleaching power, long time for releasing available chlorine in water, safety, no toxicity and the like, so that the trichloroisocyanuric acid is widely applied to disinfection of environments, drinking water, livestock and poultry houses, fish ponds and the like. However, pure trichloroisocyanuric acid has poor solubility in water, and the time for releasing active chlorine is slow.
2019-nCoV belongs to a novel beta coronavirus, and has an envelope, round or oval particles and a diameter of 60-140 nm. Currently, the disinfectants widely used in china mainly include: 84 disinfectant, alcohol and the like mainly comprise chlorine-containing agents, have strong corrosivity and unpleasant chlorine taste, can generate irritation to skin and mucous membrane when the concentration is high, can generate carcinogenic substances when being contacted with formaldehyde or diluted by hot water, and can cause 'inner-hit death' when the high-concentration chlorine invades respiratory tract.
Disclosure of Invention
The invention aims to provide a graphene oxide-trichloroisocyanuric acid compound, a preparation method and application thereof, and provides a novel nano disinfectant material.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a preparation method of a graphene oxide-trichloroisocyanuric acid compound, which comprises the following steps:
(1) preparing graphene oxide powder by improving a Hummer method;
(2) dispersing the graphene oxide dispersion liquid in N, N-Dimethylformamide (DMF), and carrying out ultrasonic treatment;
(3) adding trichloroisocyanuric acid, 4-dimethylaminopyridine and dicyclohexylcarbodiimide into the mixture obtained in the step (2), magnetically stirring for 1-3 hours at 55-65 ℃, centrifuging, discarding supernatant, and leaving a layer of solid;
(4) dispersing the lower-layer solid obtained in the step (3) in deionized water, adding trichloroisocyanuric acid, and magnetically stirring for 5-7 hours at the temperature of 45-55 ℃;
(5) washing the product obtained in the step (4) by deionized water in a vacuum filtration mode;
(6) and (4) pre-freezing the product obtained in the step (5) at a low temperature, and then performing freeze drying and grinding to obtain the graphene oxide-trichloroisocyanuric acid compound.
As a further improvement of the present invention, the step (1) of preparing graphene oxide powder by improving Hummer method includes the following steps:
(a) and (3) low-temperature stage: pouring concentrated sulfuric acid into a container, placing the container in an ice-water bath, keeping the temperature between 0 and 5 ℃, adding natural crystalline flake graphite powder into the container placed in the ice-water bath, stirring to ensure that the concentrated sulfuric acid and the natural crystalline flake graphite powder are completely mutually dissolved, adding a mixture of sodium nitrate and potassium permanganate, uniformly mixing, and reacting for 130 to 170min under a stirring state;
(b) a medium temperature stage: taking out the container after the low-temperature stage reaction is finished, placing the container in a 30-40 ℃ constant-temperature water bath device, dropwise adding warm ultrapure water into the container after the temperature in the container reaches 30-40 ℃, and stirring for 20-40 min in a heat preservation state;
(c) and (3) high-temperature stage: taking out the container after the medium temperature stage is finished, putting the container into a preheated water bath device at 90-100 ℃, uniformly stirring, adding warm ultrapure water into the container, stirring for 10-30 min under a heat preservation state, dropwise adding hydrogen peroxide into the container until the color of the solution in the container becomes golden yellow, stopping dropwise adding, and continuing to preserve heat for 10-15 min;
(d) after the reaction at the high temperature stage is finished, pouring out the liquid in the container, standing at normal temperature, removing the supernatant, repeatedly washing the precipitate with hydrochloric acid, centrifuging the precipitate to obtain the supernatant, and using BaCl2Detecting the centrifuged supernatant until no SO is detected4 2-Obtaining graphite oxide, then repeatedly oxidizing the graphite oxide by ultrapure water removal until the graphite oxide is washed to be neutral, and obtaining centrifugally cleaned graphite oxide;
(e) placing the centrifugally cleaned graphite oxide into an ultrasonic cleaner for ultrasonic stripping for 140-160 min, centrifuging, removing supernatant to obtain a precipitate, freeze-drying the precipitate for 36h, and grinding to obtain graphene oxide powder.
As a further improvement of the invention, in the step (a), the material-liquid ratio of the natural crystalline flake graphite powder to concentrated sulfuric acid is (1:50) - (1:100), the mass ratio of sodium nitrate to the natural crystalline flake graphite powder is (1: 2) - (5: 1), and the mass ratio of potassium permanganate to the natural crystalline flake graphite powder is (3: 1) - (5: 1).
As a further improvement of the invention, in the step (3), the mass ratio of trichloroisocyanuric acid, 4-dimethylaminopyridine and dicyclohexylcarbodiimide is (2-80): (1-2): 1.
as a further improvement of the invention, in the step (3), the centrifugation speed is 10000r/min, and the centrifugation time is 10-12 min.
As a further improvement of the invention, the adding amount of the trichloroisocyanuric acid in the step (4) is 1.5 times of the mass of the trichloroisocyanuric acid added in the step (3).
As a further improvement of the method, the product washed in the step (6) is pre-frozen at the temperature of-40 ℃ for 10-15 hours, and then is dried in a freeze drying mode for 10-25 hours.
The invention also provides a graphene oxide-trichloroisocyanuric acid compound prepared by the preparation method of the graphene oxide-trichloroisocyanuric acid compound.
The invention also provides application of the graphene oxide-trichloroisocyanuric acid compound, and the compound is used as a disinfectant.
The invention discloses the following technical effects:
according to the invention, trichloroisocyanuric acid and nano material graphene oxide are compounded, the graphene oxide and the trichloroisocyanuric acid generate a remarkable synergistic effect, the graphene oxide has a small size and an ultra-large specific surface area, and two surfaces of a sheet layer can be loaded with trichloroisocyanuric acid, so that more trichloroisocyanuric acid can be loaded, and the graphene oxide can be well adsorbed on the surface of a thallus; trichloroisocyanuric acid and graphene oxide are stacked through electrostatic interaction and pi-pi, so that trichloroisocyanuric acid can be uniformly loaded on the surface of the graphene oxide. Because the graphene oxide is in a monolithic layer structure and has strong mechanical strength, the cell structure of the thallus can be damaged, and the thallus is dead; the graphene oxide can also catalyze trichloroisocyanuric acid loaded on the surface of the graphene oxide to generate chloride ions, so that the bactericidal effect of the trichloroisocyanuric acid is improved, and a synergistic effect is further generated. The polyhydroxy structure of the graphene oxide adsorbs trichloroisocyanuric acid, and the loss of the trichloroisocyanuric acid is reduced, so that the sterilization effect is improved, the sterilization time is prolonged, and the sterilization efficiency is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is an electron micrograph at 200nm of a composite prepared in example 1;
FIG. 2 is an electron micrograph at 200nm of the composite prepared in example 2;
FIG. 3 is an electron micrograph at 200nm of the composite prepared in example 3.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
Example 1
Step 1 preparation of graphene oxide
Taking 4g of natural crystalline flake graphite by an electronic balance, and crushing to 12000 meshes to obtain natural crystalline flake graphite powder; measuring 92ml of concentrated sulfuric acid by using a measuring cylinder, pouring the concentrated sulfuric acid into a 1000ml three-necked bottle, cooling to 0-5 ℃, adding 4g of weighed natural crystalline flake graphite powder into 92ml of concentrated sulfuric acid, cooling to 0-5 ℃ by using an ice water bath, stirring at the speed of 100r/min until the natural crystalline flake graphite powder is completely dissolved, adding 2g of sodium nitrate and 12g of potassium permanganate, stirring at the speed of 180r/min, keeping the temperature of the mixture below 10 ℃, and continuing stirring at the speed of 180r/min for 2.5 hours; taking out the three-necked bottle, putting the three-necked bottle into a constant-temperature water bath kettle at 35 ℃, slowly adding 184ml of deionized water at 35 ℃, and stirring for 30 min; then placing the three-necked bottle into a water bath kettle at 95 ℃ for stirring reaction for 25min, adding deionized water at 95 ℃ for diluting to 560ml, stirring for 5min, adding 35ml hydrogen peroxide (with the color changing to golden yellow) with the mass fraction of 30%, preserving heat for 10min, pouring the product into a centrifuge tube, centrifugally washing at 12000r/min, and using BaCl2Detecting the centrifuged supernatant until no SO is detected4 2-And finally, putting the centrifuged solid matter into an absolute ethyl alcohol solution, performing ultrasonic treatment for 150min, and performing vacuum drying for 24h to obtain graphene oxide powder (GO).
Step 2 preparation of graphene oxide-trichloroisocyanuric acid
0.02g of prepared GO is weighed and dispersed in 10ml of DMF, and the mixture is subjected to full power ultrasound for 20 min. 0.2g of trichloroisocyanuric acid, 0.1g of 4-dimethylaminopyridine and 0.05g of dicyclohexylcarbodiimide were added and stirred magnetically at 60 ℃ for 2 h. Centrifuging for 10min at a centrifugation rate of 10000r/min by using a high-speed centrifuge, and pouring out the supernatant. The lower layer solid was dispersed in 30ml of deionized water, 0.3g of trichloroisocyanuric acid was added, and magnetic stirring was carried out at 50 ℃ for 6 hours. And (3) washing the obtained solid for multiple times in a vacuum filtration mode. Pre-freezing at-40 ℃ for 12h, drying for 12h by adopting a freeze-drying mode, grinding the obtained solid, and weighing to obtain the composite material, wherein an electron microscope image of the composite material prepared in the embodiment at 200nm is shown in figure 1.
Example 2
Step 1 preparation of graphene oxide
2g of natural crystalline flake graphite is taken by an electronic balance and crushed to 12000 meshes to obtain natural crystalline flake graphite powder; measuring 46ml of concentrated sulfuric acid by using a measuring cylinder, pouring the concentrated sulfuric acid into a 500ml three-necked bottle, cooling to 0-5 ℃, adding 2g of weighed natural crystalline flake graphite powder into 46ml of concentrated sulfuric acid, cooling to 0-5 ℃ by using an ice water bath, stirring at a speed of 100r/min until the natural crystalline flake graphite powder is completely dissolved, adding 1g of sodium nitrate and 6g of potassium permanganate, stirring at a speed of 180r/min, and keeping the temperature of the mixture below 10 ℃ and continuing stirring for 2.5 hours; taking out the three-necked bottle, putting the three-necked bottle into a constant-temperature water bath kettle at 35 ℃, slowly adding 92ml of 35 ℃ deionized water, and stirring for 30 min; putting the three-necked bottle into a water bath kettle at 90 ℃ for stirring reaction for 25min, adding deionized water at 90 ℃ for diluting to 280ml, stirring for 5min, adding 20ml hydrogen peroxide (with the mass fraction being 30 percent (the color being changed into golden yellow) and preserving heat for 10min, pouring the product into a centrifuge tube for centrifugal washing at the speed of 12000r/min, and detecting by barium chloride until no sulfate ions exist in the supernatant; and (3) putting the centrifuged solid matter into an absolute ethyl alcohol solution, performing ultrasonic treatment for 30min, and performing vacuum drying for 24h to obtain graphene oxide powder (GO).
Step 2 preparation of graphene oxide-trichloroisocyanuric acid
0.02g of prepared GO is weighed and dispersed in 10ml of DMF, and the mixture is subjected to full power ultrasound for 20 min. 0.4g of trichloroisocyanuric acid, 0.1g of 4-dimethylaminopyridine and 0.05g of dicyclohexylcarbodiimide were added and stirred magnetically at 60 ℃ for 2 h. Centrifuging for 10min at a centrifugation rate of 10000r/min by using a high-speed centrifuge, and pouring out the supernatant. The lower layer solid was dispersed in 30ml of deionized water, 0.6g of trichloroisocyanuric acid was added, and magnetic stirring was carried out at 50 ℃ for 6 hours. And (3) washing the obtained solid for multiple times in a vacuum filtration mode. Pre-freezing at-40 ℃ for 12h, drying for 12h by adopting a freeze-drying mode, grinding the obtained solid, and weighing to obtain the composite material, wherein an electron microscope image of the composite material prepared in the embodiment at 200nm is shown in FIG. 2.
Example 3
Step 1 preparation of graphene oxide
Taking 1g of natural crystalline flake graphite by an electronic balance, and crushing to 12000 meshes to obtain natural crystalline flake graphite powder; weighing 23ml of concentrated sulfuric acid by a measuring cylinder, pouring the concentrated sulfuric acid into a 500ml three-necked bottle, cooling to 0-5 ℃, adding 1g of weighed natural crystalline flake graphite powder into 23ml of concentrated sulfuric acid, cooling to 0-5 ℃ by using an ice water bath, stirring at the speed of 100r/min until the natural crystalline flake graphite powder is completely dissolved, adding 0.5g of sodium nitrate and 3g of potassium permanganate, stirring at the speed of 180r/min, and keeping the temperature of the mixture below 10 ℃ and continuing stirring for 2.5 hours; taking out the three-necked bottle, putting the three-necked bottle into a constant-temperature water bath kettle at 35 ℃, slowly adding 48ml of 35 ℃ deionized water, and stirring for 30 min; putting the three-necked bottle into a water bath kettle at 90 ℃ for stirring reaction for 25min, adding deionized water at 90 ℃ for diluting to 140ml, stirring for 5min, adding 10ml of hydrogen peroxide with the mass fraction of 30% (the color becomes golden yellow), preserving the temperature for 10min, pouring the product into a centrifuge tube, carrying out centrifugal washing at the speed of 12000r/min, and detecting by barium chloride until no sulfate ions exist in the supernatant; and (3) putting the centrifuged solid matter into an absolute ethyl alcohol solution, performing ultrasonic treatment for 30min, and performing vacuum drying for 24h to obtain graphene oxide powder (GO).
Step 3 preparation of graphene oxide-trichloroisocyanuric acid
0.02g of prepared GO is weighed and dispersed in 10ml of DMF, and the mixture is subjected to full power ultrasound for 20 min. 1.0g of trichloroisocyanuric acid, 0.5g of 4-dimethylaminopyridine and 0.5g of dicyclohexylcarbodiimide were added and stirred magnetically at 60 ℃ for 2 h. Centrifuging for 10min at a centrifugation rate of 10000r/min by using a high-speed centrifuge, and pouring out the supernatant. The lower layer solid was dispersed in 30ml of deionized water, 1.5g of trichloroisocyanuric acid was added, and magnetic stirring was carried out at 50 ℃ for 6 hours. And (3) washing the obtained solid for multiple times in a vacuum filtration mode. Pre-freezing at-40 ℃ for 12h, drying for 12h by adopting a freeze-drying mode, grinding the obtained solid, and weighing to obtain the composite material, wherein an electron microscope image of the composite material prepared in the embodiment at 200nm is shown in FIG. 3.
Example 4
Step 1 preparation of graphene oxide
Taking 0.5g of natural crystalline flake graphite by an electronic balance, and crushing to 12000 meshes to obtain natural crystalline flake graphite powder; measuring 10ml of concentrated sulfuric acid by using a measuring cylinder, pouring the concentrated sulfuric acid into a 100ml three-necked bottle, cooling to 0-5 ℃, adding 0.5g of weighed natural crystalline flake graphite powder into the 10ml of concentrated sulfuric acid, cooling to 0-5 ℃ by using an ice water bath, stirring at the speed of 100r/min until the natural crystalline flake graphite powder is completely dissolved, adding 0.25g of sodium nitrate and 1.5g of potassium permanganate, stirring at the speed of 180r/min, and keeping the temperature of the mixture below 10 ℃ and continuing stirring for 2.5 hours; taking out the three-necked bottle, putting the three-necked bottle into a constant-temperature water bath kettle at 35 ℃, slowly adding 24ml of 35 ℃ deionized water, and stirring for 30 min; placing the three-necked bottle into a water bath kettle at 90 ℃ for stirring reaction for 25min, adding deionized water at 90 ℃ for diluting to 28ml, stirring for 5min, adding 5ml hydrogen peroxide (with the mass fraction being 30% (the color being changed into golden yellow)) for heat preservation for 5min, pouring the product into a centrifuge tube, centrifuging and washing at the speed of 8000r/min, and detecting by barium chloride until no sulfate ions exist in the supernatant; and (3) putting the centrifuged solid matter into an absolute ethyl alcohol solution, performing ultrasonic treatment for 30min, and performing vacuum drying for 24h to obtain graphene oxide powder (GO).
Step 2 preparation of graphene oxide-trichloroisocyanuric acid
0.02g of prepared GO is weighed and dispersed in 10ml of DMF, and the mixture is subjected to full power ultrasound for 20 min. 2.0g of trichloroisocyanuric acid, 0.5g of 4-dimethylaminopyridine and 0.5g of dicyclohexylcarbodiimide were added and stirred magnetically at 60 ℃ for 2 h. Centrifuging for 10min at a centrifugation rate of 10000r/min by using a high-speed centrifuge, and pouring out the supernatant. The lower layer solid was dispersed in 30ml of deionized water, 3.0g of trichloroisocyanuric acid was added, and magnetic stirring was carried out at 50 ℃ for 6 hours. And (3) washing the obtained solid for multiple times in a vacuum filtration mode. Pre-freezing at-40 deg.C for 12h, freeze-drying for 12h, grinding the obtained solid, and weighing to obtain the composite material.
Comparative example 1
The same as example 3, except that graphene oxide was prepared by a conventional Hummers method.
In order to test the bacteriostatic performance of the product, according to the bacteriostatic performance test method of the dissolution antibacterial product specified in C4 of appendix C of national Standard GB15979-2002 of the people's republic of China, Escherichia coli ATCC8739, Staphylococcus aureus ATCC6538 and Candida albicans ATCC10231 are selected as test strains, tested sample groups 1-6 and a control sample group are respectively arranged for each test strain, the composite material prepared in example 1 is added into the tested sample group 1, the composite material prepared in example 2 is added into the tested sample group 2, the composite material prepared in example 3 is added into the tested sample group 3, the composite material prepared in example 4 is added into the tested sample group 4, the composite material prepared in comparative example 1 is added into the tested sample group 5, trichloroisocyanuric acid is added into the tested sample group 6, the control sample group does not contain the antibacterial material, the test is repeated for 3 times, the mean values were taken and the results of the analysis are shown in Table 1.
TABLE 1
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The preparation method of the graphene oxide-trichloroisocyanuric acid compound is characterized by comprising the following steps of:
(1) the preparation method of the graphene oxide powder by improving the Hummer method comprises the following steps:
(a) and (3) low-temperature stage: pouring concentrated sulfuric acid into a container, placing the container in an ice-water bath, keeping the temperature between 0 and 5 ℃, adding natural crystalline flake graphite powder into the container placed in the ice-water bath, stirring to ensure that the concentrated sulfuric acid and the natural crystalline flake graphite powder are completely mutually dissolved, adding a mixture of sodium nitrate and potassium permanganate, uniformly mixing, and reacting for 130 to 170min under a stirring state;
(b) a medium temperature stage: taking out the container after the low-temperature stage reaction is finished, placing the container in a constant-temperature water bath device at 30-40 ℃, dropwise adding ultrapure water into the container after the temperature in the container reaches 30-40 ℃, and stirring for 20-40 min in a heat preservation state;
(c) and (3) high-temperature stage: after the medium temperature stage is finished, taking out the container, putting the container into a water bath device at the temperature of 90-100 ℃, uniformly stirring, adding ultrapure water into the container, stirring for 10-30 min under a heat preservation state, dropwise adding hydrogen peroxide into the container until the color of the solution in the container becomes golden yellow, stopping dropwise adding, and continuing to preserve heat for 10-15 min;
(d) after the reaction at the high temperature stage is finished, pouring out the liquid in the container, standing at normal temperature, removing the supernatant, repeatedly washing the precipitate with hydrochloric acid, centrifuging the precipitate to obtain the supernatant, and using BaCl2Detecting the centrifuged supernatant until no SO is detected4 2-Obtaining graphite oxide, then repeatedly oxidizing the graphite oxide by using ultrapure water until the graphite oxide is washed to be neutral,obtaining centrifugally cleaned graphite oxide;
(e) placing the centrifugally cleaned graphite oxide into an ultrasonic cleaner for ultrasonic stripping for 140-160 min, centrifuging, removing supernatant to obtain a precipitate, freeze-drying the precipitate for 36h, and grinding to obtain graphene oxide powder;
(2) dispersing the graphene oxide dispersion liquid in N, N-dimethylformamide, and carrying out ultrasonic treatment;
(3) adding trichloroisocyanuric acid, 4-dimethylaminopyridine and dicyclohexylcarbodiimide into the mixture obtained in the step (2), magnetically stirring for 1-3 hours at 55-65 ℃, centrifuging, discarding supernatant, and leaving a layer of solid;
(4) dispersing the lower-layer solid obtained in the step (3) in deionized water, adding trichloroisocyanuric acid, and magnetically stirring for 5-7 hours at the temperature of 45-55 ℃;
(5) washing the product obtained in the step (4) by deionized water in a vacuum filtration mode;
(6) and (4) pre-freezing the product obtained in the step (5) at a low temperature, and then performing freeze drying and grinding to obtain the graphene oxide-trichloroisocyanuric acid compound.
2. The method for preparing a graphene oxide-trichloroisocyanuric acid composite according to claim 1, wherein in the step (a), the feed-liquid ratio of the natural crystalline flake graphite powder to concentrated sulfuric acid is (1:50) - (1:100), the mass ratio of sodium nitrate to the natural crystalline flake graphite powder is (1: 2) - (5: 1), and the mass ratio of potassium permanganate to the natural crystalline flake graphite powder is (3: 1) - (5: 1).
3. The method for preparing graphene oxide-trichloroisocyanuric acid composite according to claim 1, wherein the mass ratio of trichloroisocyanuric acid, 4-dimethylaminopyridine and dicyclohexylcarbodiimide in the step (3) is (2-80): (1-2): 1.
4. the method for preparing graphene oxide-trichloroisocyanuric acid composite according to claim 1, wherein the centrifugation rate in the step (3) is 10000r/min, and the centrifugation time is 10-12 min.
5. The method according to claim 1, wherein the amount of trichloroisocyanuric acid added in step (4) is 1.5 times the amount of trichloroisocyanuric acid added in step (3).
6. The method for preparing graphene oxide-trichloroisocyanuric acid composite according to claim 1, wherein the product washed in the step (6) is pre-frozen at-40 ℃ for 10-15 h, and then is dried in a freeze-drying manner for 10-25 h.
7. The graphene oxide-trichloroisocyanuric acid compound prepared by the preparation method of the graphene oxide-trichloroisocyanuric acid compound according to any one of claims 1 to 6.
8. Use of the graphene oxide-trichloroisocyanuric acid complex of claim 7 as a disinfectant.
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