Graphene quantum dot modified aminophenol formaldehyde resin as well as preparation and application thereof

Abstract

The invention relates to the technical field of preparation and application of photocatalyst materials, in particular to graphene quantum dot modified aminophenol formaldehyde resin and preparation and application thereof. The preparation method comprises the following steps: firstly, sequentially adding formaldehyde and ammonia water into a m-aminophenol solution, uniformly mixing, and sequentially performing centrifugation, drying and grinding treatment after a polymerization reaction to obtain aminophenol formaldehyde resin powder; and uniformly mixing the aminophenol formaldehyde resin powder with the graphene quantum dot solution, carrying out adsorption treatment, and sequentially carrying out washing and vacuum drying treatment to obtain the graphene quantum dot doped aminophenol formaldehyde resin: APF (at) GQDs. The APF-coated GQDs provided by the invention can be further used as a catalyst for photocatalytic preparation of hydrogen peroxide. The APF-coated GQDs provided by the invention have the advantages that the raw material cost is low, the preparation process is simple, green and pollution-free, and hydrogen peroxide is prepared at high yield under the condition of no sacrificial agent, and the APF-coated GQDs have a wide commercialization prospect.

Description

Technical Field

[0001] The invention relates to the technical field of photocatalyst material preparation and application, and in particular to a graphene quantum dot-modified aminophenol formaldehyde resin and the preparation and application thereof. Background Art

[0002] In hydrogen peroxide (H 2 O 2 ) field, especially in the study of artificial photosynthesis, 2 O 2 As an attractive chemical, H 2 O 2 It has the potential to generate electricity directly and is suitable for single-component fuel cells. Its liquid form makes it easy to store and transport, compared to other gaseous energy carriers (such as H 2 ), has significant advantages. 2 O 2 It also plays a key role in many fields. Due to its excellent strong oxidizing property and non-toxic side effects during the reaction process, H 2 O 2 It has been used as a green and environmentally friendly oxidant in chemical synthesis, paper and pulp, mining, water treatment and detergent fields.

[0003] At present, the main method for industrial production of hydrogen peroxide is the anthraquinone (AQ) method. The core of the anthraquinone method is the oxidation reaction of anthracene. In this process, anthracene reacts with oxygen to form anthracene peroxide; anthracene peroxide is further reduced by hydrogen to generate anthraquinone. This reaction is usually carried out at high temperature and high pressure; anthraquinone is oxidized by oxygen to produce H 2 O 2 and regenerated anthracene; ultimately, the produced H 2 O 2 The desired hydrogen peroxide product can be extracted and purified by appropriate methods. The anthraquinone method requires a lot of energy, and both oxidation and reduction reactions require high temperature and high pressure environments, resulting in high energy consumption. In the anthraquinone method, waste generation is inevitable, and some waste may have a negative impact on the environment. In recent years, researchers have been looking for more environmentally friendly and economical H 2 O 2 Production pathway: photocatalytic H production 2 O 2 Although photocatalytic synthesis provides a more sustainable alternative, it still faces challenges in terms of commercial scale and technical difficulty. Therefore, it is necessary to find a more economical and efficient photocatalytic synthesis of H 2 O 2 Technology is still the focus of current research. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a graphene quantum dot modified aminophenol formaldehyde resin and its preparation and application.

[0005] Aminophenol formaldehyde resin (APF) has been proven to be highly efficient in producing H 2 O 2 However, its output still cannot meet the needs of industrialization, and the production of modified aminophenol formaldehyde resin 2 O 2 No reports have been seen so far. Graphene quantum dots (GQDs), as an emerging and highly promising zero-dimensional material, have attracted significant attention in the field of photocatalytic material design. Their excellent optical properties, unique micro-size effect and high biocompatibility make them the object of special attention of researchers. The band gap of graphene quantum dots is located between π and π* orbitals, which is conducive to forming a heterojunction by expanding the π-conjugated sp2 carbon network and combining with photocatalytic materials. Graphene quantum dots can act as electron donors or acceptors, photosensitizers or electron transfer catalysts, thereby improving catalytic efficiency. At the same time, due to its ultra-small particle size, it can also serve as a highly active reaction site. Therefore, loading graphene quantum dots on aminophenol formaldehyde resin may be able to further improve its catalytic activity. The present invention provides a method for modifying aminophenol formaldehyde resin, using graphene quantum dots to dope aminophenol formaldehyde resin, further studying its practical application, and providing a new idea for modifying phenolic resin photocatalysts.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The first object of the present invention is to provide a method for preparing a graphene quantum dot-modified aminophenol formaldehyde resin, comprising the following steps:

[0008] (S1) adding formaldehyde and ammonia water to the m-aminophenol solution in sequence and mixing them evenly, and after the polymerization reaction, centrifuging, drying and grinding the mixture in sequence to obtain aminophenol formaldehyde resin powder;

[0009] (S2) The aminophenol formaldehyde resin powder obtained in step (S1) is mixed with the graphene quantum dot solution, and after adsorption treatment, the mixture is washed and vacuum dried in sequence to obtain graphene quantum dot-doped aminophenol formaldehyde resin: APF@GQDs.

[0010] In one embodiment of the present invention, in step (S1), the molar ratio of formaldehyde, ammonia water and m-aminophenol is 2:1.5:1;

[0011] In step (S2), the ratio of the m-aminophenol solution to the graphene quantum dot solution is 1 mmol: 0.5-3 mL;

[0012] The concentration of the graphene quantum dot solution is 0.1 mg / mL.

[0013] In one embodiment of the present invention, the concentration of the formaldehyde solution is 37 wt %, and the concentration of the ammonia water is 25-28% (v / v).

[0014] In one embodiment of the present invention, in step (S1), during the polymerization reaction, the temperature is room temperature and the time is 1 to 1.5 hours.

[0015] In one embodiment of the present invention, in step (S2), the graphene quantum dot solution is prepared by the following method:

[0016] The citric acid is subjected to a hydrothermal reaction and then placed in a sodium hydroxide solution to obtain a graphene quantum dot solution.

[0017] In one embodiment of the present invention, during the hydrothermal reaction, the temperature is 180-200°C and the time is 30-50 min;

[0018] Among them, when the molten citric acid turns into orange-yellow, it indicates that graphene quantum dots are generated.

[0019] In one embodiment of the present invention, the usage ratio of citric acid to sodium hydroxide solution is 0.3 g:100 mL, and the concentration of sodium hydroxide solution is 100 mg / mL.

[0020] In one embodiment of the present invention, in step (S2), during the adsorption treatment, the temperature is room temperature and the time is 3 to 5 hours.

[0021] In one embodiment of the present invention, in step (S2), during the washing process, the washing liquid is deionized water, and the number of washing times is 3 to 5 times;

[0022] During the vacuum drying process, the temperature was room temperature and the time was 12 h.

[0023] The second object of the present invention is to provide a graphene quantum dot-modified aminophenol formaldehyde resin prepared by the above method.

[0024] The third object of the present invention is to provide an application of graphene quantum dot-modified aminophenol formaldehyde resin in the photocatalytic preparation of hydrogen peroxide.

[0025] A fourth object of the present invention is to provide a method for photocatalytically preparing hydrogen peroxide, which specifically comprises the following steps:

[0026] The graphene quantum dot-modified aminophenol formaldehyde resin is dispersed in seawater or pure water as a catalyst, and a photocatalytic reaction is carried out under light to obtain hydrogen peroxide.

[0027] In one embodiment of the present invention, the dosage of the graphene quantum dot-modified aminophenol formaldehyde resin is 0.1 mg / mL;

[0028] During the photocatalytic reaction, the light source is selected from one of simulated sunlight or sunlight, oxygen is allowed to be introduced or not; the stirring speed is 400-600 rpm / min, the temperature is room temperature, and the time is 360 min.

[0029] In one embodiment of the present invention, when oxygen needs to be introduced, the oxygen flow rate is 50 to 70 mL / min.

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

[0031] (1) The APF@GQDs provided by the present invention has the advantages of low raw material cost, simple preparation process, green and pollution-free, and high yield of hydrogen peroxide in the absence of sacrificial agents, and has broad commercial prospects.

[0032] (2) The present invention proposes a strategy to use graphene quantum dots modified aminophenol formaldehyde resin as a catalyst to improve the photocatalytic production of hydrogen peroxide; graphene quantum dots are adsorbed on the surface of aminophenol formaldehyde resin microspheres to form a composite catalyst to inhibit the recombination of photogenerated carriers. The experimental results show that the catalyst material exhibits efficient photocatalytic performance and significantly delays the recombination of photogenerated charges, providing a new method for the field of photocatalytic production of hydrogen peroxide and promoting the application of phenolic resin in the field of photocatalysis.

[0033] (3) The present invention provides a photocatalytic hydrogen peroxide production process, which has the advantages of being simple, environmentally friendly, and having a wide range of applications. Whether in pure water or seawater, and whether or not oxygen is continuously supplied, the concentration of hydrogen peroxide produced can still reach a relatively high level. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The SEM image of the aminophenol formaldehyde resin in Example 1 and the TEM image of the graphene quantum dots doped aminophenol formaldehyde resin (APF@GQDs-1.5);

[0035] Figure 2 It is the XRD pattern of APF, APF@GQDs-0.5, APF@GQDs-1, APF@GQDs-1.5, APF@GQDs-3;

[0036] Figure 3 The hydrogen peroxide production graphs of APF, APF@GQDs-0.5, APF@GQDs-1, APF@GQDs-1.5, and APF@GQDs-3;

[0037] Figure 4 The hydrogen peroxide production of graphene quantum dots doped with aminophenol formaldehyde resin (APF@GQDs-1.5) in different reaction systems (pure water / seawater, oxygen / no oxygen). DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the following examples, unless otherwise specified, all reagents used are commercially available reagents, and all detection means and methods used are conventional detection means and methods in the art.

[0040] In the following examples, the graphene quantum dot solution was prepared by the following method:

[0041] 0.3 g of citric acid was placed in a 100 mL beaker, heated to 180° C. in an oven (in the actual process, 180-200° C. was acceptable), and hydrothermally reacted for 40 min (the color changed from transparent to light yellow), and then dispersed in 100 mL of NaOH solution (concentration of 10 mg / mL) to obtain a graphene quantum dot solution.

[0042] Example 1

[0043] This embodiment provides a method for preparing a graphene quantum dot-modified aminophenol formaldehyde resin, comprising the following steps:

[0044] (S1) 1 mmol of m-aminophenol was dispersed in 100 mL of aqueous solution. After the m-aminophenol was completely dissolved, 150 μL of formaldehyde solution (37 wt%) and 100 μL of ammonia water (27 wt%) were added in sequence. A yellow mixed solution was formed after polymerization reaction (room temperature, 1 h). The mixture was then centrifuged, the supernatant was discarded, and the precipitate was washed 3 times with deionized water and dried at room temperature to obtain aminophenol formaldehyde resin (such as Figure 1 As shown in A, it was found that the aminophenol formaldehyde resin was mainly nanospheres with a diameter of about 300 nm);

[0045] (S2) 100 mg of aminophenol formaldehyde resin powder was mixed with 1.5 mL of graphene quantum dot solution and 8.5 mL of water, and then stirred for 5 h after ultrasonic treatment for half an hour, and then centrifuged and the supernatant was discarded. The precipitate was washed with deionized water for 3 times and then dried at room temperature to obtain graphene quantum dot-modified aminophenol formaldehyde resin: APF@GQDs-1.5 (such as Figure 1 As shown in Figure B, graphite quantum dots (GQDs) were found to be uniformly dispersed on the surface of aminophenol formaldehyde resin. The size of GQDs was about 5 nm, and the corresponding lattice spacing was 0.21 nm, indicating the (1100) crystal plane of GQDs).

[0046] The XRD pattern of APF@GQDs-1.5 prepared in this example is shown in Figure 2. It is found that the diffraction peaks of its XRD are all around 2θ=20°, and this peak belongs to the (002) crystal plane of graphite.

[0047] Example 2

[0048] This embodiment provides a method for preparing a graphene quantum dot-modified aminophenol formaldehyde resin, comprising the following steps:

[0049] (S1) dispersing 1 mmol of m-aminophenol in 100 mL of aqueous solution, and after the m-aminophenol is completely dissolved, 150 μL of formaldehyde solution (37 wt%) and 100 μL of ammonia water (27 wt%) are added in sequence, and a yellow mixed solution is formed after polymerization reaction (room temperature, 1 h), and then centrifuged, the supernatant is discarded, and the precipitate is washed 3 times with deionized water, and dried at room temperature to obtain aminophenol formaldehyde resin;

[0050] (S2) 100 mg of aminophenol formaldehyde resin powder was mixed with 0.5 mL of graphene quantum dot solution and 9.5 mL of water. After ultrasonic treatment for half an hour, stirring was continued for 5 hours. The mixture was then centrifuged and the supernatant was discarded. The precipitate was washed three times with deionized water and then dried at room temperature to obtain graphene quantum dot-modified aminophenol formaldehyde resin: APF@GQDs-0.5.

[0051] The XRD pattern of APF@GQDs-0.5 prepared in this example is shown in Figure 2. It is found that the diffraction peaks of the XRD are all around 2θ=20°, and this peak belongs to the (002) crystal plane of graphite.

[0052] Example 3

[0053] This embodiment provides a method for preparing a graphene quantum dot-modified aminophenol formaldehyde resin, comprising the following steps:

[0054] (S1) dispersing 1 mmol of m-aminophenol in 100 mL of aqueous solution, and after the m-aminophenol is completely dissolved, 150 μL of formaldehyde solution (37 wt%) and 100 μL of ammonia water (27 wt%) are added in sequence, and a yellow mixed solution is formed after polymerization reaction (room temperature, 1 h), and then centrifuged, the supernatant is discarded, and the precipitate is washed 3 times with deionized water, and dried at room temperature to obtain aminophenol formaldehyde resin;

[0055] (S2) 100 mg of aminophenol formaldehyde resin powder was mixed with 1 mL of graphene quantum dot solution and 9 mL of water. After ultrasonic treatment for half an hour, stirring was continued for 5 hours. The mixture was then centrifuged and the supernatant was discarded. The precipitate was washed three times with deionized water and then dried at room temperature to obtain graphene quantum dot-modified aminophenol formaldehyde resin: APF@GQDs-1.

[0056] The XRD pattern of APF@GQDs-1 prepared in this example is shown in Figure 2. It is found that the diffraction peaks of the XRD are all around 2θ=20°, which belongs to the (002) crystal plane of graphite.

[0057] Example 4

[0058] This embodiment provides a method for preparing a graphene quantum dot-modified aminophenol formaldehyde resin, comprising the following steps:

[0059] (S1) dispersing 1 mmol of m-aminophenol in 100 mL of aqueous solution, and after the m-aminophenol is completely dissolved, 150 μL of formaldehyde solution (37 wt%) and 100 μL of ammonia water (27 wt%) are added in sequence, and a yellow mixed solution is formed after polymerization reaction (room temperature, 1 h), and then centrifuged, the supernatant is discarded, and the precipitate is washed 3 times with deionized water, and dried at room temperature to obtain aminophenol formaldehyde resin;

[0060] (S2) 100 mg of aminophenol formaldehyde resin powder was mixed with 3 mL of graphene quantum dot solution and 7 mL of water. After ultrasonic treatment for half an hour, stirring was continued for 5 hours. The mixture was then centrifuged and the supernatant was discarded. The precipitate was washed three times with deionized water and then dried at room temperature to obtain graphene quantum dot-modified aminophenol formaldehyde resin: APF@GQDs-3.

[0061] The XRD pattern of APF@GQDs-3 prepared in this example is shown in Figure 2. It is found that the diffraction peaks of the XRD are all around 2θ=20°, which belongs to the (002) crystal plane of graphite.

[0062] Comparative Example 1

[0063] This embodiment provides a method for preparing an aminophenol formaldehyde resin, comprising the following steps:

[0064] Disperse 1 mmol of m-aminophenol in 100 mL of aqueous solution. After it is completely dissolved, add 150 μL of formaldehyde solution (37 wt%) and 100 μL of ammonia water (27 wt%) in sequence. After polymerization reaction (room temperature, 1 h), a yellow mixed solution is formed. The mixture is then centrifuged, the supernatant is discarded, and the precipitate is washed three times with deionized water. It is then dried at room temperature to obtain aminophenol formaldehyde resin: APF.

[0065] The XRD pattern of the APF prepared in this comparative example is shown in FIG2 .

[0066] Example 5

[0067] This embodiment provides a method for preparing hydrogen peroxide by photocatalysis, which specifically includes the following steps:

[0068] 1) APF@GQDs-1.5 prepared in Example 1:

[0069] 5 mg APF@GQDs-1.5 was dispersed in 50 mL aqueous solution and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonic treatment for 5 min. Oxygen was continuously bubbled into the suspension (oxygen flow rate was 50 mL / min) and a xenon lamp light source (light intensity was 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0070] 2) APF@GQDs-0.5 prepared in Example 2:

[0071] 5 mg APF@GQDs-0.5 was dispersed in 50 mL aqueous solution and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonic treatment for 5 min. Oxygen was continuously bubbled into the suspension (oxygen flow rate was 50 mL / min) and a xenon lamp light source (light intensity was 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0072] 3) APF@GQDs-1 prepared in Example 3:

[0073] 5 mg APF@GQDs-1 was dispersed in 50 mL aqueous solution and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonic treatment for 5 min. Oxygen was continuously bubbled into the suspension (oxygen flow rate was 50 mL / min) and a xenon lamp light source (light intensity was 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0074] 4) APF@GQDs-3 prepared in Example 4:

[0075] 5 mg APF@GQDs-3 was dispersed in 50 mL aqueous solution and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonic treatment for 5 min. Oxygen was continuously bubbled into the suspension (oxygen flow rate was 50 mL / min) and a xenon lamp light source (light intensity was 100 mW / cm 2), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0076] 5) APF prepared in Comparative Example 1:

[0077] 5 mg APF was dispersed in 50 mL aqueous solution. After 5 min of ultrasonic treatment, the suspension was transferred to a photocatalytic reactor with a round quartz top cover. Oxygen was continuously bubbled into the suspension (the oxygen flow rate was 50 mL / min). The xenon lamp light source (light intensity was 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0078] The experimental results are as follows Figure 3 As shown, through Figure 3 It can be found that when the doping amount of graphene quantum dots increases from 0.5ml, 1ml, 1.5ml to 3ml, the catalytic performance gradually increases with the increase of the doping amount. When the doping amount increases to 1.5ml, the amount of hydrogen peroxide generated reaches a peak value, and the photocatalytic yield of hydrogen peroxide is 2335μmol / g. Further increasing the doping amount of graphene quantum dots, the photocatalytic performance begins to decline.

[0079] Example 6

[0080] This embodiment provides a method for preparing hydrogen peroxide by photocatalysis, which specifically includes the following steps:

[0081] 1) Catalytic pure water + oxygen:

[0082] 5 mg APF@GQDs-1.5 was dispersed in 50 mL aqueous solution and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonic treatment for 5 min. Oxygen was continuously bubbled into the suspension (oxygen flow rate was 50 mL / min) and a xenon lamp light source (light intensity was 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0083] 2) Catalytic pure water + no oxygen:

[0084] 5 mg APF@GQDs-1.5 was dispersed in 50 mL aqueous solution and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonication for 5 min. The xenon lamp light source (light intensity of 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0085] 3) Catalytic seawater + oxygen:

[0086] 5 mg APF@GQDs-1.5 was dispersed in 50 mL seawater and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonic treatment for 5 min. Oxygen was continuously bubbled into the suspension (oxygen flow rate was 50 mL / min) and a xenon lamp light source (light intensity was 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0087] 4) Catalytic seawater + no oxygen:

[0088] 5 mg APF@GQDs-1.5 was dispersed in 50 mL seawater and transferred to a photocatalytic reactor with a round quartz top cover after ultrasonication for 5 min. The xenon lamp light source (light intensity of 100 mW / cm 2 ), simulate sunlight through a filter (AM1.5G); after a certain reaction time (intermittent sampling interval is 30min, total reaction time is 3h), take a small amount of supernatant to measure the hydrogen peroxide concentration, and calculate the hydrogen peroxide generation rate.

[0089] The results are as follows Figure 4 As shown, through Figure 4 It can be found that APF@GQDs-1.5 has a higher hydrogen peroxide yield in pure water (regardless of whether oxygen is introduced); and in seawater (regardless of whether oxygen is introduced), it can still maintain a higher hydrogen peroxide yield.

[0090] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for preparing graphene quantum dot modified aminophenol formaldehyde resin, characterized in that: The following steps are involved: (S1) adding formaldehyde and ammonia water to the m-aminophenol solution in sequence and mixing them evenly, and after the polymerization reaction, centrifuging, drying and grinding the mixture in sequence to obtain aminophenol formaldehyde resin powder; (S2) The aminophenol formaldehyde resin powder obtained in step (S1) is mixed with the graphene quantum dot solution, and after adsorption treatment, the mixture is washed and vacuum dried in sequence to obtain graphene quantum dot-doped aminophenol formaldehyde resin: APF@GQDs.

2. The method for preparing a graphene quantum dot-modified aminophenol formaldehyde resin according to claim 1, wherein: In step (S1), the molar ratio of formaldehyde, ammonia water and m-aminophenol is 2:1.5:1; In step (S2), the ratio of the m-aminophenol solution to the graphene quantum dot solution is 1 mmol: 0.5-3 mL; The concentration of the graphene quantum dot solution is 0.1 mg / mL.

3. The method for preparing a graphene quantum dot modified aminophenol formaldehyde resin according to claim 1, characterized in that: In step (S1), during the polymerization reaction, the temperature is room temperature and the time is 1 to 1.5 hours.

4. The method for preparing a graphene quantum dot modified aminophenol formaldehyde resin according to claim 1, characterized in that: In step (S2), the graphene quantum dot solution is prepared by the following method: The citric acid is subjected to a hydrothermal reaction and then placed in a sodium hydroxide solution to obtain a graphene quantum dot solution.

5. A method for preparing a graphene quantum dot modified aminophenol formaldehyde resin according to claim 4, characterized in that: During the hydrothermal reaction, the temperature is 180-200°C and the time is 30-50 minutes.

6. The method for preparing a graphene quantum dot modified aminophenol formaldehyde resin according to claim 1, characterized in that: In step (S2), during the adsorption treatment, the temperature is room temperature and the time is 3 to 5 hours.

7. A graphene quantum dot modified aminophenol formaldehyde resin, characterized in that: It is prepared by the method according to any one of claims 1 to 6.

8. Use of the graphene quantum dot-modified aminophenol formaldehyde resin as claimed in claim 7 in the photocatalytic preparation of hydrogen peroxide.

9. A method for preparing hydrogen peroxide by photocatalysis, characterized in that: The specific steps include: The graphene quantum dot-modified aminophenol formaldehyde resin described in claim 7 is dispersed in seawater or pure water as a catalyst, and a photocatalytic reaction is carried out under light to obtain hydrogen peroxide.

10. The method for preparing hydrogen peroxide by photocatalysis according to claim 9, characterized in that: The dosage of the graphene quantum dot modified aminophenol formaldehyde resin is 0.1 mg / mL; During the photocatalytic reaction, oxygen is allowed to flow in or not, and the temperature is room temperature.

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