Organically modified tellurium nanocomposite material and preparation method thereof

Abstract

The present invention relates to the technical field of tellurium nanomaterials, specifically an organically modified tellurium nanocomposite material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a PVP aqueous solution and a phytic acid aqueous solution under ultrasonic action to obtain an electrolyte; clamping a tellurium pellet with a platinum electrode with a clamp as a working electrode, using a new platinum electrode as a counter electrode, and immersing the working electrode and the counter electrode in the electrolyte at intervals; connecting the working electrode and the counter electrode to a DC power supply, and causing the tellurium pellet to react in the electrolyte by adjusting the operating voltage and operating time to obtain a mixed solution; dialyzing the mixed solution and then drying it to obtain the organically modified tellurium nanocomposite material. The organically modified tellurium nanocomposite material prepared by the method of the present invention has good dispersibility in water, high biocompatibility, and excellent chemical stability, and does not degrade even after being stored in solution for more than three months.

Description

Technical Field

[0001] The present invention relates to the technical field of tellurium nanomaterials, and in particular to an organically modified tellurium nanocomposite material and a preparation method thereof. Background Art

[0002] Tellurium is a VIA element in the fifth period, which possesses many excellent properties, including high stability, excellent thermoelectric properties, ultra-high carrier mobility, and photoresponsivity. Tellurium has an adjustable band gap, which is related to thickness and ranges from 0.35eV to 1.04eV from a monolayer to a bulk material. Single-crystalline tellurium is composed of stacked one-dimensional helical molecular chains, which are connected by van der Waals forces and stacked to form a layered material without surface dangling bonds. The synthesis methods of two-dimensional tellurium nanostructures include molecular beam epitaxy (MBE), physical vapor deposition (PVD), solution synthesis, liquid phase exfoliation (LPE), and thermal evaporation.

[0003] Currently, the environmental stability of tellurium nanomaterials is poor. The existing test method for the stability of tellurium nanomaterials is to apply the material to a device and evaluate the stability of the tellurium nanomaterial based on the performance changes of the device. This test method shows that the environmental stability of the tellurium nanomaterial is maintained at 2 months. If the stability is only evaluated in a solution, it may not reach two months, which limits the use of tellurium nanomaterials.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an organically modified tellurium nanocomposite material and a preparation method thereof, aiming to solve the problems of poor chemical stability and limited application range of existing tellurium nanomaterials.

[0006] The technical solutions of the present invention are as follows:

[0007] A method for preparing an organically modified tellurium nanocomposite material, comprising the steps of:

[0008] The PVP aqueous solution and the phytic acid aqueous solution are mixed uniformly under ultrasonication to obtain an electrolyte;

[0009] A platinum electrode with a clamp is used to clamp the tellurium pellet as a working electrode, a new platinum electrode is used as a counter electrode, and the working electrode and the counter electrode are immersed in the electrolyte at intervals;

[0010] Connecting the working electrode and the counter electrode to a DC power supply, and adjusting the working voltage and working time to allow the tellurium pellets to react in the electrolyte to obtain a mixed solution;

[0011] The mixed solution is dialyzed and then transferred to a freeze dryer for drying, thereby obtaining the organic-modified tellurium nanocomposite material.

[0012] In the method for preparing the organically modified tellurium nanocomposite material, the concentration of the PVP aqueous solution is 0.1-2 mg / ml.

[0013] In the method for preparing the organically modified tellurium nanocomposite material, the concentration of the phytic acid aqueous solution is 1.5-15 mg / ml.

[0014] The method for preparing the organically modified tellurium nanocomposite material, wherein the molecular weight of PVP in the PVP aqueous solution is 350,000-400,000.

[0015] In the method for preparing the organically modified tellurium nanocomposite material, the distance between the working electrode and the counter electrode is 1-5 cm, and the tellurium pellets in the working electrode are completely immersed below the electrolyte interface.

[0016] The method for preparing the organically modified tellurium nanocomposite material, wherein the DC power supply is in IT mode, the output voltage is set in the range of -6 to -9V, and the time is set to 10min-120min.

[0017] The method for preparing the organic-modified tellurium nanocomposite material, wherein the mixed solution is dialyzed and then transferred to a freeze dryer for drying, i.e., the step of preparing the organic-modified tellurium nanocomposite material comprises:

[0018] The mixed solution was ultrasonicated in a water bath for 1 min-60 min, and after the ultrasonication was completed, the mixed solution was poured into a dialysis bag. The dialysis time was 5 h-48 h, and the water was changed continuously during the dialysis process;

[0019] After dialysis is completed, the material in the dialysis bag is transferred to a clean container and placed in a freeze dryer. First, the temperature of the freeze dryer is set to -10°C to -50°C, then the dryer is vacuumed and the drying time is set to 24h-72h. After drying is completed, the air valve is opened to remove the sample. The obtained solid material is an organically modified tellurium nanocomposite material.

[0020] An organically modified tellurium nanocomposite material is prepared by adopting the preparation method of the organically modified tellurium nanocomposite material of the present invention.

[0021] Beneficial effects: The organically modified tellurium nanocomposite material prepared by the method of the present invention has good dispersibility in water, high biocompatibility, and very excellent chemical stability. It does not degrade even when stored in solution for more than 3 months. The present invention enriches the product forms of tellurium nanomaterials and expands the application range of tellurium. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a flow chart of a method for preparing an organically modified tellurium nanocomposite material provided by the present invention.

[0023] Figure 2 This is a graph showing the results of XPS testing of the organically modified tellurium nanocomposites prepared in Examples 1-3 and the tellurium nanomaterials prepared in Comparative Examples 1-5, which were dispersed in water and allowed to stand for 10 days.

[0024] Figure 3 These are state diagrams of the organically modified tellurium nanocomposite material prepared in Example 1, the tellurium nanomaterial prepared in Comparative Example 1, and the tellurium nanomaterial prepared in Comparative Example 5, after being dispersed in water and left to stand for 1 day, 3 days, 5 days, 10 days, and 90 days, respectively. DETAILED DESCRIPTION

[0025] The present invention provides an organically modified tellurium nanocomposite material and a method for preparing the same. To clarify the objectives, technical solutions, and effects of the present invention, the present invention is described in further detail below. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention.

[0026] See also Figure 1 , Figure 1 The flow chart of the preparation method of an organically modified tellurium nanocomposite material provided by the present invention is shown in the figure, which includes the following steps:

[0027] S10, mixing the PVP aqueous solution and the phytic acid aqueous solution uniformly under ultrasonic action to obtain an electrolyte;

[0028] S20, clamping the tellurium pellet with a platinum electrode with a clip as a working electrode, using a new platinum electrode as a counter electrode, and immersing the working electrode and the counter electrode in the electrolyte at intervals;

[0029] S30, connecting the working electrode and the counter electrode to a DC power supply, and adjusting the working voltage and working time to allow the tellurium pellets to react in the electrolyte to obtain a mixed solution;

[0030] S40, dialyzing the mixed solution and then transferring it to a freeze dryer for drying, thereby obtaining an organic-modified tellurium nanocomposite material.

[0031] Specifically, in the present invention, phytic acid, also known as cyclohexanehexol hexaphosphate, is a natural organic phosphate compound. The abundant phosphate anion groups in the phytic acid structure give it excellent electrical conductivity in the electrolyte, and can serve as a catalyst to enhance the electrochemical stripping of tellurium pellets to form tellurium nanomaterials. At the same time, the phytic acid can further promote the growth of PVP chains in the electrolytic cell and form a coating on the stripped tellurium nanomaterials, thereby producing PVP-coated tellurium nanomaterials, i.e., the organic-modified tellurium nanocomposite material described in the present invention.

[0032] The preparation method provided by the present invention is simple and easy to operate, and the organically modified tellurium nanocomposite material prepared by the present invention has good dispersibility in water, high biocompatibility, and very excellent chemical stability, and does not degrade even when stored in solution for more than three months; the present invention enriches the product forms of tellurium nanomaterials, expands the application range of tellurium, and is expected to be used in the fields of biomedicine, water treatment, optoelectronics, photothermal therapy, etc.

[0033] In some embodiments, the concentration of the PVP aqueous solution is 0.1-2 mg / ml, but not limited thereto. In this embodiment, the molecular weight of PVP in the PVP aqueous solution is 350,000-400,000, but not limited thereto, and preferably the molecular weight of PVP is 360,000.

[0034] In some embodiments, the concentration of the phytic acid aqueous solution is 1.5-15 mg / ml, but is not limited thereto.

[0035] In some embodiments, the distance between the working electrode and the counter electrode is 1-5 cm, and the tellurium pellet in the working electrode is completely immersed below the electrolyte interface.

[0036] In some embodiments, the mass of the tellurium pellets is 10-200 mg. The DC power supply method described herein is not limited and can be implemented as follows: using an electrochemical workstation, set the mode to IT, set the output voltage within the range of -6 to -9 V, and set the duration to 10-120 minutes. After ensuring that the entire circuit is connected, current and voltage input is initiated. During the electrochemical preparation process, a large amount of brown-black material gradually falls off the surface of the tellurium pellets and eventually disperses in the solution, forming a mixed solution.

[0037] In some embodiments, the mixed solution is sonicated in a water bath for 1 min-60 min, and after the sonication is completed, the mixed solution is poured into a dialysis bag, the dialysis time is 5 h-48 h, and the water is continuously changed during the dialysis process; after the dialysis is completed, the substance in the dialysis bag is transferred to a clean container and placed in a freeze dryer. First, the temperature of the freeze dryer is set to -10°C to -50°C, and then the dryer is vacuumed and the drying time is set to 24 h-72 h. After the drying is completed, the air valve is opened to take out the sample, and the obtained solid substance is an organically modified tellurium nanocomposite material.

[0038] In some embodiments, an organically modified tellurium nanocomposite material is further provided, wherein the organically modified tellurium nanocomposite material is prepared using the preparation method of the organically modified tellurium nanocomposite material of the present invention.

[0039] The present invention will be further explained below by means of specific embodiments:

[0040] Example 1

[0041] A method for preparing an organically modified tellurium nanocomposite material comprises the following steps:

[0042] 1. Mix 15 mg of PVP with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500 W ultrasonic cleaner. The concentration of the resulting PVP aqueous solution is 0.5 mg / ml. Add 100 mg of 50% phytic acid solution to the above solution and ultrasonically mix for 5 minutes to prepare a uniform and stable PVP / phytic acid solution for later use.

[0043] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the PVP / phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a PVP / phytic acid / Te solution.

[0044] 3. Ultrasonicate the obtained PVP / phytic acid / Te solution in an ultrasonic cleaner for 15 minutes. After the ultrasonication is completed, add the solution to a dialysis bag and dialyze it in a deionized water environment for 24 hours. The deionized water is continuously replaced during the dialysis process. After the dialysis is completed, transfer the solution in the dialysis bag to a clean beaker and place it in a freeze dryer that has been cooled to -25°C. The freeze dryer is evacuated to a vacuum state and the drying time is set to 36 hours. After the drying is completed, take out the obtained solid as an organically modified tellurium nanomaterial.

[0045] Example 2

[0046] A method for preparing an organically modified tellurium nanocomposite material comprises the following steps:

[0047] 1. Mix 30 mg of PVP with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500 W ultrasonic cleaner. The concentration of the resulting PVP aqueous solution is 1.0 mg / ml. Add 100 mg of 50% phytic acid solution to the above solution and ultrasonically mix for 5 minutes to prepare a uniform and stable PVP / phytic acid solution for later use.

[0048] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the PVP / phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a PVP / phytic acid / Te solution.

[0049] 3. Ultrasonicate the obtained PVP / phytic acid / Te solution in an ultrasonic cleaner for 15 minutes. After the ultrasonication is completed, add the solution to a dialysis bag and dialyze it in a deionized water environment for 24 hours. The deionized water is continuously replaced during the dialysis process. After the dialysis is completed, transfer the solution in the dialysis bag to a clean beaker and place it in a freeze dryer that has been cooled to -25°C. The freeze dryer is evacuated to a vacuum state and the drying time is set to 36 hours. After the drying is completed, take out the obtained solid as an organically modified tellurium nanomaterial.

[0050] Example 3

[0051] A method for preparing an organically modified tellurium nanocomposite material comprises the following steps:

[0052] 1. Mix 60 mg of PVP with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500 W ultrasonic cleaner. The concentration of the resulting PVP aqueous solution is 2.0 mg / ml. Add 100 mg of 50% phytic acid solution to the above solution and ultrasonically mix for 5 minutes to prepare a uniform and stable PVP / phytic acid solution for later use.

[0053] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the PVP / phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a PVP / phytic acid / Te solution.

[0054] 3. Ultrasonicate the obtained PVP / phytic acid / Te solution in an ultrasonic cleaner for 15 minutes. After the ultrasonication is completed, add the solution to a dialysis bag and dialyze it in a deionized water environment for 24 hours. The deionized water is continuously replaced during the dialysis process. After the dialysis is completed, transfer the solution in the dialysis bag to a clean beaker and place it in a freeze dryer that has been cooled to -25°C. The freeze dryer is evacuated to a vacuum state and the drying time is set to 36 hours. After the drying is completed, take out the obtained solid as an organically modified tellurium nanomaterial.

[0055] Example 4

[0056] A method for preparing an organically modified tellurium nanocomposite material comprises the following steps:

[0057] 1. Take 3 mg of PVP and mix it with 30 ml of deionized water. Ultrasonicate and mix it in a 1500W ultrasonic cleaner for 5 minutes. The concentration of the obtained PVP aqueous solution is 0.1 mg / ml. Add 100 mg of 50% phytic acid solution to the above solution, and then ultrasonicate and mix it for 5 minutes to prepare a uniform and stable PVP / phytic acid solution for use.

[0058] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the PVP / phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a PVP / phytic acid / Te solution.

[0059] 3. Ultrasonicate the obtained PVP / phytic acid / Te solution in an ultrasonic cleaner for 15 minutes. After the ultrasonication is completed, add the solution to a dialysis bag and dialyze it in a deionized water environment for 24 hours. The deionized water is continuously replaced during the dialysis process. After the dialysis is completed, transfer the solution in the dialysis bag to a clean beaker and place it in a freeze dryer that has been cooled to -25°C. The freeze dryer is evacuated to a vacuum state and the drying time is set to 36 hours. After the drying is completed, take out the obtained solid as an organically modified tellurium nanomaterial.

[0060] Comparative Example 1

[0061] A method for preparing an organically modified tellurium nanomaterial comprises the following steps:

[0062] 1. Mix 50 mg of phytic acid 50% solution with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500W ultrasonic cleaner to prepare a uniform and stable phytic acid solution for later use.

[0063] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a phytic acid / Te solution.

[0064] 3. Ultrasonicate the obtained phytic acid / Te solution in an ultrasonic cleaning machine for 15 minutes. After the ultrasonication is completed, filter the solution and wash it with deionized water. After the filtration is completed, dry the filter film. The black solid obtained after drying is the phytic acid-modified tellurium nanomaterial.

[0065] Comparative Example 2

[0066] A method for preparing an organically modified tellurium nanomaterial comprises the following steps:

[0067] 1. Mix 100 mg of phytic acid 50% solution with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500W ultrasonic cleaner to prepare a uniform and stable phytic acid solution for later use.

[0068] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a phytic acid / Te solution.

[0069] 3. Ultrasonicate the obtained phytic acid / Te solution in an ultrasonic cleaning machine for 15 minutes. After the ultrasonication is completed, filter the solution and wash it with deionized water. After the filtration is completed, dry the filter film. The black solid obtained after drying is the phytic acid-modified tellurium nanomaterial.

[0070] Comparative Example 3

[0071] A method for preparing an organically modified tellurium nanomaterial comprises the following steps:

[0072] 1. Mix 200 mg of phytic acid 50% solution with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500W ultrasonic cleaner to prepare a uniform and stable phytic acid solution for later use.

[0073] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a phytic acid / Te solution.

[0074] 3. Ultrasonicate the obtained phytic acid / Te solution in an ultrasonic cleaning machine for 15 minutes. After the ultrasonication is completed, filter the solution and wash it with deionized water. After the filtration is completed, dry the filter film. The black solid obtained after drying is the phytic acid-modified tellurium nanomaterial.

[0075] Comparative Example 4

[0076] A method for preparing an organically modified tellurium nanomaterial comprises the following steps:

[0077] 1. Mix 500 mg of phytic acid 50% solution with 30 ml of deionized water and ultrasonically mix for 5 minutes in a 1500W ultrasonic cleaner to prepare a uniform and stable phytic acid solution for later use.

[0078] 2. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in the phytic acid solution. The tellurium pellets must be completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a phytic acid / Te solution.

[0079] 3. Ultrasonicate the obtained phytic acid / Te solution in an ultrasonic cleaning machine for 15 minutes. After the ultrasonication is completed, filter the solution and wash it with deionized water. After the filtration is completed, dry the filter film. The black solid obtained after drying is the phytic acid-modified tellurium nanomaterial.

[0080] Comparative Example 5

[0081] A method for preparing a tellurium nanomaterial comprises the following steps:

[0082] 1. Take 50mg of tellurium pellets and clamp them with a platinum electrode with a clip. Use it as the working electrode and another platinum electrode as the counter electrode. Install the two electrodes on the electrode cap, and set the distance between the two electrodes to 5cm. Immerse the tellurium pellets and the platinum electrode in a conventional electrolyte, and make sure that the tellurium pellets are completely immersed below the solution interface. Connect a DC power supply, set the input voltage to -8V, and set the reaction time to 60min. Wait until the reaction is complete, and the resulting solution is a Te solution.

[0083] 3. Ultrasonicate the obtained Te solution in an ultrasonic cleaner for 15 minutes. After the ultrasonication is completed, add the solution to a dialysis bag and dialyze it in a deionized water environment for 24 hours. During the dialysis process, continuously replace the deionized water. After the dialysis is completed, transfer the solution in the dialysis bag to a clean beaker and place it in a freeze dryer that has been cooled to -25°C. The freeze dryer is evacuated to a vacuum state and the drying time is set to 36 hours. After the drying is completed, take out the obtained solid as pure tellurium nanomaterial.

[0084] Test Example 1

[0085] The organic modified tellurium nanocomposites prepared in Examples 1-3 and the tellurium nanomaterials prepared in Comparative Examples 1-5 were dispersed in water and allowed to stand for 10 days before being subjected to XPS testing. The results are as follows: Figure 2 As shown, Figure 2 From left to right, the first peak represents Te peak, the second peak represents tellurium oxide peak, and the Figure 2 The results show that the organically modified tellurium nanocomposites prepared in Examples 1-3 did not oxidize after standing in water for 10 days, while the tellurium nanomaterials in Comparative Examples 1-5 all oxidized to varying degrees, indicating that the tellurium nanocomposites formed after being coated with PVP are not easily oxidized.

[0086] Test Example 2

[0087] The organic modified tellurium nanocomposite material prepared in Example 1 (denoted as A), the tellurium nanomaterial prepared in Comparative Example 1 (denoted as B), and the tellurium nanomaterial prepared in Comparative Example 5 (denoted as C) were dispersed in water and allowed to stand. The states of the materials were observed after 1 day, 3 days, 5 days, 15 days, and 90 days. The results are as follows: Figure 3 As shown. Figure 3 The results show that the tellurium nanomaterials in Comparative Examples 1 and 5 were partially oxidized on the 3rd day, and the materials in the water had been stratified and could not be evenly dispersed in the water, while the organic-modified tellurium nanocomposite prepared in Example 1 was still evenly dispersed in the water; on the 5th day, the tellurium nanomaterials in Comparative Examples 1 and 5 were basically completely oxidized and precipitated at the bottom, while the organic-modified tellurium nanocomposite prepared in Example 1 was still evenly dispersed in the water; by the 15th day, the tellurium nanomaterials in Comparative Examples 1 and 5 were basically completely degraded and appeared transparent in the water, while the organic-modified tellurium nanocomposite prepared in Example 1 was still evenly dispersed in the water without oxidation or degradation; by the 90th day, the organic-modified tellurium nanocomposite prepared in Example 1 was still evenly dispersed in the water without oxidation or degradation.

[0088] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for preparing an organically modified tellurium nanocomposite material, characterized in that: Including steps: The PVP aqueous solution and the phytic acid aqueous solution are mixed uniformly under ultrasonication to obtain an electrolyte; A platinum electrode with a clamp is used to clamp the tellurium pellet as a working electrode, a new platinum electrode is used as a counter electrode, and the working electrode and the counter electrode are immersed in the electrolyte at intervals; Connecting the working electrode and the counter electrode to a DC power supply, and adjusting the working voltage and working time to allow the tellurium pellets to react in the electrolyte to obtain a mixed solution; The mixed solution is dialyzed and then transferred to a freeze dryer for drying, thereby obtaining the organic-modified tellurium nanocomposite material.

2. The method for preparing the organically modified tellurium nanocomposite material according to claim 1, characterized in that: The concentration of the PVP aqueous solution is 0.1-2 mg / ml.

3. The method for preparing the organically modified tellurium nanocomposite material according to claim 1, characterized in that: The concentration of the phytic acid aqueous solution is 1.5-15 mg / ml.

4. The method for preparing the organically modified tellurium nanocomposite material according to claim 1, characterized in that: In the PVP aqueous solution, the molecular weight of PVP is 350,000-400,000.

5. The method for preparing the organically modified tellurium nanocomposite material according to claim 1, characterized in that: The distance between the working electrode and the counter electrode is 1-5 cm, and the tellurium pellets in the working electrode are completely immersed below the electrolyte interface.

6. The method for preparing the organically modified tellurium nanocomposite material according to claim 1, characterized in that: The DC power supply is in it mode, the output voltage is set in the range of -6 to -9V, and the time is set to 10min-120min.

7. The method for preparing the organically modified tellurium nanocomposite material according to claim 1, characterized in that: The mixed solution is dialyzed and then transferred to a freeze dryer for drying, to obtain the organic-modified tellurium nanocomposite material, comprising: The mixed solution was ultrasonicated in a water bath for 1 min-60 min, and after the ultrasonication was completed, the mixed solution was poured into a dialysis bag. The dialysis time was 5 h-48 h, and the water was changed continuously during the dialysis process; After dialysis is completed, the material in the dialysis bag is transferred to a clean container and placed in a freeze dryer. First, the temperature of the freeze dryer is set to -10°C to -50°C, then the dryer is vacuumed and the drying time is set to 24h-72h. After drying is completed, the air valve is opened to remove the sample. The obtained solid material is an organically modified tellurium nanocomposite material.

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