Method for preparing arsenic nano material by taking arsenic sulfide-amine solution as arsenic source
By using an arsenic sulfide-amine solution as the arsenic source and heating and stirring in an alkaline polyol system, the problems of uncontrollability and product inhomogeneity in the preparation process of arsenic nanomaterials in the prior art have been solved, and controllable synthesis and good dispersibility under weak reducing conditions have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CENT SOUTH UNIV
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-17
AI Technical Summary
Existing methods for preparing arsenic nanomaterials suffer from problems such as high equipment requirements, wide product size distribution, difficulty in controlling morphology, and the use of strong reducing agents in chemical methods leading to uncontrollable reaction processes and poor product uniformity.
Arsenic sulfide-amine solution was used as the arsenic source. A stable precursor solution was formed by heating and stirring in an alkaline polyol system. Arsenic nanomaterials were generated by reduction under conditions without strong reducing agents. The process included steps such as ultrasonic treatment, heating and stirring, solid-liquid separation and washing.
The controllable synthesis of arsenic nanomaterials under weak reducing conditions was achieved, which improved the controllability of the reaction and the size uniformity of the product, reduced the reaction rate, and the preparation process was simple and reproducible.
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Figure CN121870098A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of inorganic nanomaterials, and particularly relates to a method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source. Background Technology
[0002] Nanomaterials, due to their small size effect, quantum size effect, and surface effect, exhibit unique properties in optics, electronics, catalysis, and biomedicine, and have become an important direction in materials science research. In recent years, arsenic nanomaterials, as one of the emerging single-element nanomaterials, have been found to possess excellent near-infrared absorption and photothermal conversion properties, showing promising application prospects in fields such as photothermal therapy. Compared with some arsenic compounds, elemental arsenic exhibits relatively low systemic toxicity under certain conditions, giving it potential advantages in biomedical applications.
[0003] Currently, the main methods for preparing arsenic nanomaterials include physical and chemical methods. Physical methods, such as mechanical ball milling and exfoliation, have problems such as high equipment requirements, wide product size distribution, and difficulty in controlling morphology. Chemical methods often use arsenic oxide or arsenite as the arsenic source and rely on strong reducing agents such as sodium borohydride for reduction. However, strong reducing agents can easily lead to uncontrollable reaction processes, poor product uniformity, and low safety and reproducibility.
[0004] Therefore, it is necessary to provide a method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, in order to solve the technical problem of how to generate nanoscale elemental arsenic under conditions without strong reducing agents. Summary of the Invention
[0005] The main objective of this invention is to provide a method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, aiming to solve the technical problem of how to generate nanoscale elemental arsenic under conditions without strong reducing agents.
[0006] To achieve the above objectives, the present invention provides a method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source, comprising the following steps: S1, mix arsenic sulfide and an amine solvent to obtain an arsenic sulfide-amine solution; S2, the arsenic sulfide-amine solution and the polyol solution are heated and stirred under the protection of an inert gas to obtain a reaction solution containing arsenic nanomaterials; the heating and stirring temperature is 150~210℃; The arsenic nanomaterials include elemental arsenic; the polyol solution includes alkaline hydroxide and liquid polyol.
[0007] Furthermore, the process of mixing the arsenic sulfide and the amine solvent includes: adding the arsenic sulfide to the amine solvent, and dissolving the arsenic sulfide by ultrasonic treatment to obtain the arsenic sulfide-amine solution.
[0008] Furthermore, the amine solvent includes one or more of ethanolamine, ethylenediamine, propylenediamine, and butylamine; the liquid polyol includes at least one of ethylene glycol, propylene glycol, butylene glycol, and diethylene glycol.
[0009] Furthermore, the heating and stirring temperature is 160~200℃; the heating and stirring time is 1~5h.
[0010] Furthermore, the polyol solution also includes a surfactant; the surfactant includes polyvinylpyrrolidone; the ratio of the surfactant to the liquid polyol is 3~8 mg: 1 mL.
[0011] Furthermore, in the method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, no strong reducing agent is introduced.
[0012] Further, the ratio of arsenic sulfide to the amine solvent is 0.02~0.08 mmol: 1 mL; The volume ratio of the amine solvent to the liquid polyol is 1:5~15; The ratio of hydroxide ions derived from the alkaline hydroxide to the liquid polyol is 0.025~0.4 mmol: 1 mL.
[0013] Furthermore, the alkaline hydroxide includes at least one of sodium hydroxide and potassium hydroxide; the inert gas includes at least one of nitrogen and argon.
[0014] Furthermore, step S2 further includes: separating the reaction solution into solid and liquid phases; Step S2 further includes: cooling the reaction solution before performing the solid-liquid separation; Step S2 further includes: washing the solid obtained from the solid-liquid separation; the washing uses a mixture of anhydrous ethanol and acetone, wherein the volume ratio of anhydrous ethanol to acetone is 1~3:1~3; Step S2 further includes drying the washed product at a temperature of 50-80°C.
[0015] Furthermore, the arsenic nanomaterial is elemental arsenic, spherical in shape, with a particle size at the nanoscale, and uniformly dispersed.
[0016] Compared with the prior art, the present invention has at least the following advantages: To address the problems of high reduction potential, the need for strong reducing agents, difficulty in controlling the reaction process, and inconsistent particle size and morphology of arsenic nanomaterials obtained in liquid-phase reduction processes using arsenic sources such as arsenic oxide and arsenite in existing technologies, this invention provides a method for the controllable synthesis of arsenic nanomaterials under weak reducing conditions. This invention pertains to the process of controllable synthesis of arsenic nanomaterials in a weak reducing system using arsenic sulfide-amine solution as the arsenic source. By dissolving arsenic sulfide in an amine solvent to form a stable precursor, the arsenic species are placed in a relatively activated state. In an alkaline polyol system, without the participation of strong reducing agents, the gradual reduction of arsenic sulfide to elemental arsenic is achieved, thereby effectively reducing the reaction rate and improving the controllability of the reaction process.
[0017] This invention enables the reduction process to be completed without the participation of strong reducing agents, avoiding the problems of rapid reduction and runaway reaction caused by strong reducing agents. The reaction is carried out in an alkaline polyol system, with mild and controllable reaction conditions, which is beneficial for regulating the nucleation and growth process of arsenic nanomaterials and improving the size uniformity and dispersibility of the obtained products. The preparation process of this invention is simple and reproducible, suitable for further scale-up preparation. Therefore, this invention has developed an arsenic source system that enables the controllable synthesis of arsenic nanomaterials under weak reducing conditions, different from existing arsenic oxide or arsenite arsenic sources, which is of great significance for promoting the development of this field. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0019] Figure 1 This is a scanning electron microscope (SEM) image of the product obtained in Example 1 of the present invention; Figure 2 This is a particle size distribution map of the product obtained in Example 1 of the present invention, based on SEM image statistics. Figure 3 This is an X-ray photoelectron spectroscopy (XPS) image of the product obtained in Example 1 of the present invention; Figure 4 This is a scanning electron microscope (SEM) image of the product obtained in Example 2 of the present invention; Figure 5 This is a particle size distribution map of the product obtained in Example 2 of the present invention, based on SEM image statistics. Figure 6 This is a scanning electron microscope (SEM) image of the product obtained in Example 3 of the present invention; Figure 7 This is a particle size distribution diagram of the product obtained in Example 3 of the present invention, obtained based on SEM image statistics. Figure 8 This is a scanning electron microscope (SEM) image of the product obtained in Example 4 of the present invention; Figure 9 This is a scanning electron microscope (SEM) image of the product obtained in Example 5 of the present invention; Figure 10 This is a scanning electron microscope (SEM) image of the product obtained in Comparative Example 2 of the present invention.
[0020] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
[0023] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the present invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.
[0024] This invention provides a method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source, comprising the following steps: S1, mix arsenic sulfide and an amine solvent to obtain an arsenic sulfide-amine solution.
[0025] In this invention, the process of mixing the arsenic sulfide and the amine solvent includes: adding the arsenic sulfide to the amine solvent, and then dissolving the arsenic sulfide by ultrasonic treatment to obtain the arsenic sulfide-amine solution. Specifically, the arsenic sulfide is added to the amine solvent, and then fully dissolved by ultrasonic treatment to obtain the arsenic sulfide-amine solution as a precursor.
[0026] In this invention, the amine solvent includes one or more of ethanolamine, ethylenediamine, propylenediamine, and butylamine, and is more preferably ethanolamine or ethylenediamine; the arsenic sulfide is arsenic trisulfide; the ratio of the arsenic sulfide to the amine solvent is 0.02~0.08 mmol:1 mL, and more preferably 0.04~0.06 mmol:1 mL.
[0027] S2, the arsenic sulfide-amine solution and the polyol solution are heated and stirred under the protection of an inert gas to obtain a reaction solution containing arsenic nanomaterials.
[0028] In this invention, the polyol solution comprises an alkaline hydroxide and a liquid polyol; further, the polyol solution comprises the alkaline hydroxide, the liquid polyol, and a surfactant; further, the polyol solution is a mixture of the alkaline hydroxide, the surfactant, and the liquid polyol.
[0029] This invention reduces arsenic to elemental arsenic without the participation of strong reducing agents, and no sodium borohydride or other strong reducing agents are introduced during the reaction. Specifically, in the method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, no strong reducing agent is introduced; furthermore, in the method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, only the arsenic sulfide, the amine solvent, the alkaline hydroxide, and the liquid polyol may be added; or only the arsenic sulfide, the amine solvent, the alkaline hydroxide, the surfactant, and the liquid polyol may be added.
[0030] In this invention, the volume ratio of the amine solvent to the liquid polyol is 1:5~15; more specifically, it is 1:8~10.
[0031] In this invention, the ratio of hydroxide ions derived from the alkaline hydroxide to the liquid polyol is 0.025~0.4 mmol:1 mL; more specifically, 0.05~0.06 mmol:1 mL. Alternatively, it can be understood that the ratio of the alkaline hydroxide to the liquid polyol is 0.025~0.4 mmol:1 mL; more specifically, 0.05~0.06 mmol:1 mL.
[0032] In this invention, the ratio of the surfactant to the liquid polyol is 3-8 mg: 1 mL; more specifically, it is 5-6 mg: 1 mL.
[0033] In this invention, the liquid polyol includes at least one of ethylene glycol, propylene glycol, butanediol, and diethylene glycol, and is further ethylene glycol.
[0034] In this invention, the surfactant includes or is polyvinylpyrrolidone; the surfactant can improve the dispersibility and morphological uniformity of the obtained arsenic nanomaterials.
[0035] In this invention, the alkaline hydroxide includes at least one of sodium hydroxide and potassium hydroxide; the inert gas includes at least one of nitrogen and argon.
[0036] In this invention, the heating and stirring temperature is 150~210℃, further 160~200℃, further 160~180℃, or 175~185℃, or 160~165℃; the heating and stirring time is 1~5h, further 2~3h.
[0037] In this invention, step S2 may further include: separating the reaction solution into solid and liquid phases; step S2 may further include: cooling the reaction solution before performing the solid-liquid separation; step S2 may further include: washing the solid obtained from the solid-liquid separation; the washing uses a mixture of anhydrous ethanol and acetone, wherein the volume ratio of anhydrous ethanol to acetone is 1~3:1~3; step S2 may further include: drying the washed product; the drying temperature is 50~80℃.
[0038] Specifically, this invention involves adding arsenic sulfide to an amine solvent and sonicating it to fully dissolve the arsenic sulfide, obtaining an arsenic sulfide-amine solution as a precursor solution. The obtained precursor solution is then added to a polyol solution containing the alkaline hydroxide, along with the surfactant. The reaction is carried out under inert gas protection with heating and stirring, reducing the arsenic sulfide to elemental arsenic in the absence of a strong reducing agent. After the reaction is complete, the reaction system is cooled, and the resulting product is centrifuged, washed, and dried to obtain the arsenic nanomaterials. This method features a simple preparation process, mild reaction conditions, good reproducibility, and produces arsenic nanomaterials with nanoscale particle size and good dispersibility.
[0039] In this invention, the arsenic nanomaterial includes elemental arsenic; further, the arsenic nanomaterial is elemental arsenic. The arsenic nanomaterial or the elemental arsenic is spherical, with a particle size at the nanoscale, and uniformly dispersed; that is, the arsenic nanomaterial is elemental arsenic particles with a particle size at the nanoscale and good dispersion.
[0040] In this invention, the particle size of the arsenic nanomaterial can be in the range of 50~300nm, and more preferably in the range of 125~225nm; the average particle size of the arsenic nanomaterial is 132~220nm, and more preferably 137~214nm. As some more specific embodiments, the particle size range of the arsenic nanomaterial is 150~195nm, with an average particle size of 168.6±7.9nm; the particle size range of the arsenic nanomaterial is 125~150nm, with an average particle size of 137.0±4.5nm; or, the particle size range of the arsenic nanomaterial is 200~225nm, with an average particle size of 214.0±5.8nm.
[0041] The following are specific examples of the present invention: Example 1 A method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, comprising the following steps: 0.05 mmol of arsenic trisulfide was added to 1 mL of ethanolamine and sonicated to completely dissolve it, yielding a precursor solution (arsenic trisulfide-amine solution in this example).
[0042] 0.5 mmol sodium hydroxide and 50 mg polyvinylpyrrolidone were added to 9 mL ethylene glycol and stirred until fully dissolved (referred to as polyol solution). The precursor solution was then added to the solution, and the mixture was heated to 180 °C and stirred for 2 h to obtain the reaction solution. Argon gas was introduced for protection throughout the reaction.
[0043] After the reaction was completed, the reaction solution was cooled; after centrifugation, it was washed three times with anhydrous ethanol and acetone (at a volume ratio of 3:1) (8000 rpm, 5 min), and the precipitate was placed in a vacuum oven and dried at 60°C to obtain the product of this embodiment; the product of this embodiment is arsenic nanosphere material, mainly elemental arsenic.
[0044] In this embodiment, the reaction system remained stable during the reaction process, and no obvious violent reactions or sudden changes were observed. The color of the system changed slowly as the reaction progressed, and the overall reaction process was relatively smooth, demonstrating mild reaction characteristics. During the reaction, the formation of particles in the system could not be observed with the naked eye.
[0045] Figure 1 The image shown is a scanning electron microscope (SEM) image of the product obtained in this embodiment. It can be seen that the product is spherical and the particle size is at the nanoscale. Figure 2 The particle size distribution results obtained based on SEM images show that the obtained product has a relatively concentrated particle size distribution and a uniform size distribution, with a particle size range of 150~195 nm and an average particle size of 168.6 nm.
[0046] Figure 3The image shows the X-ray photoelectron spectroscopy (XPS) spectrum of the product obtained in this embodiment. The results indicate that the product is mainly elemental arsenic with only a small amount of surface oxidation.
[0047] Example 2 A method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, comprising the following steps: 0.05 mmol of arsenic trisulfide was added to 1 mL of ethylenediamine and sonicated to completely dissolve it, yielding a precursor solution (arsenic trisulfide-amine solution in this example).
[0048] 0.5 mmol sodium hydroxide and 50 mg polyvinylpyrrolidone were added to 9 mL ethylene glycol and stirred until fully dissolved (referred to as polyol solution). The precursor solution was then added to the solution, and the mixture was heated to 180 °C and stirred for 2 h to obtain the reaction solution. Argon gas was introduced for protection throughout the reaction.
[0049] After the reaction was completed, the reaction solution was cooled; after centrifugation, it was washed three times with anhydrous ethanol and acetone (at a volume ratio of 3:1) (8000 rpm, 5 min), and the precipitate was placed in a vacuum oven and dried at 60°C to obtain the product of this embodiment; the product of this embodiment is arsenic nanosphere material, mainly elemental arsenic.
[0050] In this embodiment, the reaction system remained stable during the reaction process, and no obvious violent reactions or sudden changes were observed. The color of the system changed slowly as the reaction progressed, and the overall reaction process was relatively smooth, demonstrating mild reaction characteristics. During the reaction, the formation of particles in the system could not be observed with the naked eye.
[0051] Figure 4 The image shown is a scanning electron microscope (SEM) image of the product obtained in this embodiment. It can be seen that the product is spherical and the particle size is at the nanoscale. Figure 5 The particle size distribution results obtained based on SEM images show that the obtained product has a relatively concentrated particle size distribution and a uniform size distribution, with a particle size range of 125~150 nm and an average particle size of 137.0 nm.
[0052] In this embodiment, by changing the amine solvent to ethylenediamine, nanoscale arsenic materials can still be prepared, indicating that the amine solvent has good applicability.
[0053] Example 3 A method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, comprising the following steps: 0.05 mmol of arsenic trisulfide was added to 1 mL of ethanolamine and sonicated to completely dissolve it, yielding a precursor solution (arsenic trisulfide-amine solution in this example).
[0054] 0.5 mmol sodium hydroxide and 50 mg polyvinylpyrrolidone were added to 9 mL ethylene glycol and stirred until fully dissolved (referred to as polyol solution). The precursor solution was then added to the solution, and the mixture was heated to 160 °C and stirred for 2 h to obtain the reaction solution. Argon gas was introduced for protection throughout the reaction.
[0055] After the reaction was completed, the reaction solution was cooled; after centrifugation, it was washed three times with anhydrous ethanol and acetone (at a volume ratio of 3:1) (8000 rpm, 5 min), and the precipitate was placed in a vacuum oven and dried at 60°C to obtain the product of this embodiment; the product of this embodiment is arsenic nanosphere material, mainly elemental arsenic.
[0056] In this embodiment, the reaction system remained stable during the reaction process, and no obvious violent reactions or sudden changes were observed. The color of the system changed slowly as the reaction progressed, and the overall reaction process was relatively smooth, demonstrating mild reaction characteristics. During the reaction, the formation of particles in the system could not be observed with the naked eye.
[0057] Figure 6 The image shown is a scanning electron microscope (SEM) image of the product obtained in this embodiment. It can be seen that the product is spherical and the particle size is at the nanoscale. Figure 7 The particle size distribution results obtained based on SEM images show that the obtained product has a relatively concentrated particle size distribution and a uniform size distribution, with a particle size range of 200~225 nm and an average particle size of 214.0 nm.
[0058] The results of this embodiment show that the method of the present invention has good applicability and stability within a certain temperature range.
[0059] Example 4 Compared to Example 1, this embodiment only changes polyvinylpyrrolidone to polyethylene glycol, while keeping other conditions unchanged.
[0060] The product obtained in this embodiment is mainly elemental arsenic.
[0061] In this embodiment, the formation of obvious particles in the system can be observed with the naked eye during the reaction process.
[0062] Figure 8 The image shown is a scanning electron microscope (SEM) image of the product obtained in this embodiment. It can be seen that the particles in the product are agglomerated and the particle size distribution is uneven.
[0063] Example 5 Compared to Example 1, this embodiment omits the addition of polyvinylpyrrolidone, while keeping other conditions unchanged.
[0064] The product obtained in this embodiment is mainly elemental arsenic.
[0065] In this embodiment, the formation of obvious particles in the system can be observed with the naked eye during the reaction process.
[0066] Figure 9 The image shown is a scanning electron microscope (SEM) image of the product obtained in this embodiment. It can be seen that the particles in the product are agglomerated and the particle size distribution is uneven.
[0067] Comparative Example 1 Compared to Example 1, this comparative example only changed the temperature of the heating and stirring reaction to 120°C, while keeping other conditions unchanged.
[0068] In this comparative example, no separable solid product was obtained after centrifugation of the reaction solution; no obvious reduction reaction was observed during the reaction process of this comparative example, indicating that arsenic nanomaterials are difficult to obtain under the temperature conditions of this comparative example.
[0069] Comparative Example 2 In this comparative example, a traditional strong reducing agent is introduced, and the specific process is as follows: 0.05 mmol of arsenic trisulfide was added to 1 mL of ethanolamine and sonicated until completely dissolved to obtain a precursor solution.
[0070] The precursor solution was added to 9 mL of ethylene glycol and stirred until homogeneous. Then, 50 mg of polyvinylpyrrolidone was added at room temperature under argon protection, followed by sodium borohydride as a strong reducing agent and the reaction was carried out for 1 h.
[0071] In this comparative example, after the introduction of a strong reducing agent, the reaction system changed rapidly, with the system color quickly changing to blackish-yellow and accompanied by gas generation, indicating a relatively vigorous reaction process. After the reaction was completed, the product was obtained by centrifugation, washing, and drying.
[0072] Figure 10 The image shows a scanning electron microscope (SEM) image of the product obtained in this comparative example. It can be seen that the size and morphology of the obtained product are not uniform, and the regular and uniform spherical nanostructures in Example 1 are not formed.
[0073] The above technical solutions of the present invention are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made under the technical concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.
Claims
1. A method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source, characterized in that, Including the following steps: S1, mix arsenic sulfide and an amine solvent to obtain an arsenic sulfide-amine solution; S2, the arsenic sulfide-amine solution and the polyol solution are heated and stirred under the protection of an inert gas to obtain a reaction solution containing arsenic nanomaterials; the heating and stirring temperature is 150~210℃; The arsenic nanomaterials include elemental arsenic; the polyol solution includes alkaline hydroxide and liquid polyol.
2. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, The process of mixing the arsenic sulfide and the amine solvent includes: adding the arsenic sulfide to the amine solvent, and dissolving the arsenic sulfide by ultrasonic treatment to obtain the arsenic sulfide-amine solution.
3. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, The amine solvent includes one or more of ethanolamine, ethylenediamine, propylenediamine, and butylamine; the liquid polyol includes at least one of ethylene glycol, propylene glycol, butylene glycol, and diethylene glycol.
4. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, The heating and stirring temperature is 160~200℃; the heating and stirring time is 1~5h.
5. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, The polyol solution also includes a surfactant; the surfactant includes polyvinylpyrrolidone; the ratio of the surfactant to the liquid polyol is 3~8 mg: 1 mL.
6. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, In the method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as the arsenic source, no strong reducing agent is introduced.
7. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, The ratio of arsenic sulfide to the amine solvent is 0.02~0.08 mmol: 1 mL; The volume ratio of the amine solvent to the liquid polyol is 1:5~15; The ratio of hydroxide ions derived from the alkaline hydroxide to the liquid polyol is 0.025~0.4 mmol: 1 mL.
8. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, The alkaline hydroxide includes at least one of sodium hydroxide and potassium hydroxide; the inert gas includes at least one of nitrogen and argon.
9. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to claim 1, characterized in that, Step S2 further includes: separating the reaction solution into solid and liquid phases; Step S2 further includes: cooling the reaction solution before performing the solid-liquid separation; Step S2 further includes: washing the solid obtained from the solid-liquid separation; the washing uses a mixture of anhydrous ethanol and acetone, wherein the volume ratio of anhydrous ethanol to acetone is 1~3:1~3; Step S2 further includes drying the washed product at a temperature of 50-80°C.
10. The method for preparing arsenic nanomaterials using arsenic sulfide-amine solution as an arsenic source according to any one of claims 1-9, characterized in that, The arsenic nanomaterial is elemental arsenic, spherical in shape, with a particle size at the nanoscale, and uniformly dispersed.