Method for catalytic degradation of organic pollutants in wastewater by friction and application thereof

Abstract

The application belongs to the technical field of sewage treatment, and particularly relates to a method for catalytically degrading organic pollutants in sewage through friction and application thereof, a double-friction interface system is constructed by arranging a metal friction interface at the bottom of a sewage treatment reaction container and arranging a magnetic turntable at the lower end of a magnetic stirrer, an improved sewage treatment reaction container is obtained, and a nano-powder catalyst with a layered structure is selected, in the process of catalytically degrading organic pollutants in sewage through friction, the friction mechanical energy is continuously converted into a friction potential, the valence band electron energy on the surface of the catalyst is continuously obtained to jump to a conduction band, the generation rate of free electrons and holes is improved, and the reaction rate of free electrons, holes, water and oxygen is accelerated, a large amount of •OH, •O2 ‑ and other strong oxidizing free radicals are generated in a short time, and the degradation of organic pollutants is accelerated.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a method for degrading organic pollutants in wastewater through frictional catalysis and its application. Background Technology

[0002] The main methods for treating organic wastewater include physical, biological, and chemical methods. Among these, the oxidation method within the chemical approach has significant advantages. This technology generates hydroxyl radicals (•OH) and superoxide radicals (•O2). - ) and holes (h + Strong oxidizing free radicals such as photocatalysis and pyrolysis can completely mineralize recalcitrant organic matter into smaller inorganic molecules or transform it into more easily treated intermediate products, thereby achieving deep purification of organic wastewater. Electrocatalysis degrades organic matter through a catalytic reaction driven by an external electric field. Although chemical methods can effectively degrade organic pollutants, they suffer from high energy consumption and secondary pollution. Clean energy catalytic technologies, such as photocatalysis, pyroelectric catalysis, and piezoelectric catalysis, have emerged to address these challenges. They offer advantages such as being environmentally friendly, but their application conditions are complex and demanding. For example, photocatalysis cannot operate in areas with insufficient light, and piezoelectric catalysis requires specific piezoelectric properties of materials and appropriate mechanical energy input methods, making it difficult to widely adopt clean energy catalytic technologies.

[0003] Currently, tribochemical oxidation, a mechanically driven catalytic oxidation system, has become a research hotspot. Compared with traditional catalytic methods, it combines the characteristics of triboelectric charging and catalytic reaction, triggering electron activation on the catalyst surface to complete the catalytic reaction and degrade organic pollutants in wastewater. This provides a green, environmentally friendly, and low-energy-consumption solution for organic pollutant degradation and energy conversion. However, research on mechanically driven catalytic oxidation systems is limited, and tribochemical catalytic reaction systems suffer from problems such as a single triboelectric interface, low electron transfer rate, and limited free radical generation rate. This results in long degradation times for organic pollutants in wastewater, leading to time-consuming, labor-intensive, and costly treatment. Summary of the Invention

[0004] To address the problems of existing technologies, this invention provides a method for degrading organic pollutants in wastewater through tribocatalysis and its application. By setting a metal triboelectric interface at the bottom of the wastewater treatment reaction vessel and placing a magnetic rotating disk at the lower end of a magnetic stirrer, a dual triboelectric interface system is constructed, resulting in an improved wastewater treatment reaction vessel. During the tribocatalytic degradation of organic pollutants in wastewater, mechanical energy is continuously converted into triboelectric potential, ensuring that valence band electrons on the catalyst surface continuously gain sufficient energy to transition to the conduction band. This increases the generation rate of free electrons and holes, thereby accelerating the reaction rate of free electrons, holes, water, and oxygen, and generating a large number of electrons in a short time. - h + •OH, •O2 -These active species accelerate the degradation of organic pollutants.

[0005] To solve the above-mentioned technical problems, the present invention provides a method for degrading organic pollutants in wastewater through tribocatalytic degradation. The method comprises: setting a metal triboelectric interface at the bottom of a wastewater treatment reaction vessel; and setting a magnetic rotating disk at the lower end of a magnetic stirrer within the wastewater treatment reaction vessel, thereby obtaining an improved wastewater treatment reaction vessel; specifically including the following steps: S1. Bottom friction interface setting: Select a metal friction surface and fix it to the bottom of the wastewater treatment reaction vessel to obtain the bottom friction interface, which serves as the electron supply layer; S2. Setting of upper friction interface: Select a magnetic turntable and fix it to the lower end of the magnetic stirrer of the sewage treatment reaction vessel in a detachable manner to obtain the upper friction interface, which serves as an electron plundering layer and provides mechanical energy for frictional catalysis through magnetic stirring; the upper friction interface and the bottom friction interface are set relative to each other; S3. Catalyst selection: Nanoparticles with layered structures are selected as catalysts for the tribocatalytic reaction to provide catalytic active centers for the catalytic reaction; S4. Inject wastewater into the wastewater treatment reaction vessel improved by S1 and S2, with the injection volume being less than 50% of the reaction vessel volume. Add the catalyst described in S3 at a dosage of 1~10 g / L. Start the magnetic stirrer described in S2 and stir continuously at a speed of 200~600 rpm for 2~6 h until the content of organic pollutants in the wastewater meets the standard.

[0006] In the technical solution of this invention, the bottom friction interface and the upper friction interface are arranged opposite to each other to construct a double-layer friction interface system. During the wastewater treatment process, the added catalyst particles are concentrated in the middle area of ​​the double-layer friction interface. The magnetic disc of the magnetic stirrer, i.e. the upper friction interface, will generate a continuous pressing and frictional effect on the catalyst particles during the high-speed rotation and stirring process. At the same time, the bottom friction interface will also generate a reaction force acting on the catalyst particles. Under the combined frictional force of the bottom and upper double-layer friction interfaces, the catalytic function of the catalyst can be enhanced.

[0007] Preferably, the metal friction surface in S1 is made of tungsten, titanium, copper or chromium metal, and the purity of the tungsten, titanium, copper or chromium metal is greater than 99%.

[0008] More preferably, the metal friction surface in S1 is made of tungsten metal with a purity greater than 99%.

[0009] In the technical solution of this invention, tungsten metal is the optimal choice for selecting the metal friction surface. When a tungsten metal friction interface is used as the bottom friction interface of the tribocatalytic degradation reaction vessel, the degradation rate of organic pollutants in wastewater is higher. This is because tungsten metal has higher conductivity and lower work function, making it easier to provide electrons to the conduction band or generate holes in the valence band during tribocatalytic degradation, thereby increasing the carrier concentration and facilitating the formation of electron injection channels with the catalyst, thus accelerating the degradation of the catalyst surface. - with h + Separation rate, enhancing the ability to degrade organic pollutants.

[0010] Preferably, the magnetic turntable in S2 is made of polytetrafluoroethylene, polyvinylidene fluoride, ethylene-propylene copolymer, polypropylene, or polyethylene.

[0011] More preferably, the magnetic turntable in S2 is made of polytetrafluoroethylene.

[0012] In the technical solution of this invention, when selecting a magnetic turntable, it is best to use a magnetic turntable made of polytetrafluoroethylene (PTFE). This is because PTFE magnetic turntables have the characteristics of wear resistance, high strength and chemical stability. When applied to the treatment of wastewater by frictional catalytic degradation, they can resist the corrosive effect of organic pollutants in wastewater, and their low coefficient of friction can reduce the energy consumption of treatment.

[0013] Preferably, the nanopowder in S3 is a composition of one or more of Bi2O3, BaTiO3, ZnO, TiO2 or Al2O3 nanopowders mixed in any mass ratio.

[0014] More preferably, the nanopowder in S3 is Bi2O3 nanopowder.

[0015] Preferably, the particle size of the nanoparticles is 0.3~30 μm.

[0016] Applying the method of degrading organic pollutants in wastewater by friction catalysis as described in this invention to the treatment of organic pollutants in wastewater can effectively degrade organic pollutants in wastewater, especially organic dye pollutants or antibiotic pollutants, which have a more significant degradation effect.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The technical solution of the present invention constructs a dual friction interface system by setting a metal friction interface at the bottom of the wastewater treatment reaction vessel and a magnetic rotating disk at the lower end of the magnetic stirrer; in the process of frictional catalytic degradation of organic pollutants, the continuous friction provides mechanical energy to the catalyst, thereby inducing electron transfer between the bottom friction interface, the catalyst and the upper friction interface, and inducing the separation of electrons and holes on the catalyst surface. The generated free electrons and holes react with water and oxygen, so that the reaction system can generate a large number of electrons in a short time. - h + •OH, •O2 - Active species such as these accelerate the degradation rate of high-concentration pollutants; (2) In the technical solution of the present invention, the bottom metal friction interface is made of tungsten, titanium, copper or chromium metal. Utilizing the high conductivity and low work function of the metal, it is easy to provide electrons to its conduction band or generate holes in the valence band during the tribocatalytic degradation of organic pollutants. The resulting high concentration of charge carriers can form an electron injection channel with the catalyst surface, thereby accelerating the electron injection process on the catalyst surface. - with h + The separation rate is improved, enhancing the degradation capacity of organic pollutants and accelerating wastewater treatment efficiency; in particular, the application of a bottom friction interface made of tungsten metal to the wastewater treatment reaction vessel significantly enhances the degradation capacity of organic pollutants in wastewater. (3) In the technical solution of the present invention, nanoparticles with layered structure are used as catalysts, which can provide more edge and surface active sites. Compared with conventional catalysts, they are easier to contact organic molecules and enhance catalytic reactions. In addition, the nanoparticles with layered structure selected in the present invention are not easily broken or worn during the tribocatalytic reaction, do not produce agglomeration, and can maintain long-term catalytic activity. Among them, Bi2O3, as a typical p-type semiconductor, will form a Schottky barrier with the bottom metal triboelectric interface layer. The low work function of the metal makes it easier for electrons to flow from its surface to Bi2O3, thereby forming an electron transfer path between the bottom, catalyst, and upper triboelectric interface. In particular, when tungsten metal is used as the bottom triboelectric interface, its excellent electron loss ability and high conductivity accelerate the electron transfer process, thereby generating more active species to degrade organic pollutants.

[0018] (4) The magnetic turntable made of polytetrafluoroethylene, polyvinylidene fluoride, ethylene-propylene copolymer, polypropylene or polyethylene as raw materials has high strength and corrosion resistance. It is not easy to generate debris and contaminate the reaction system. It can also maintain its own stability and is not corroded by organic pollutants. It is not easy to crack during repeated start-stop of the magnetic stirrer. In particular, the magnetic turntable made of polytetrafluoroethylene has better performance. The fluorine atoms in the polytetrafluoroethylene molecule have extremely high electronegativity and are very easy to attract electrons. This makes the polytetrafluoroethylene as a whole have a strong binding ability for electrons. When in contact with other materials, it tends to take electrons from other materials and become negatively charged, thereby accelerating the electron transfer rate of the reaction system. It also has excellent mechanical durability and wear resistance. It can withstand highly corrosive media such as aqua regia and hydrofluoric acid. It also has a low coefficient of friction, which can reduce the frictional resistance during magnetic stirring, reduce energy loss and prevent the reactants from sticking. It is especially suitable for high viscosity systems or sewage treatment containing easily crystallizing materials, and can prevent the reactants from sticking and clumping. (5) The technical solution of the present invention can effectively degrade organic pollutants of Rhodamine B dye, effectively degrade antibiotic pollutants such as tetracycline hydrochloride, ciprofloxacin and cefazolin sodium, with a degradation rate of more than 98%, and the degradation time is short and the efficiency is high. (6) Compared with the prior art, the technical solution of the present invention introduces a metal friction surface with high conductivity and low work function into the friction catalytic degradation system, and sets a magnetic turntable at the lower end of the stirrer, which improves the structure of the wastewater treatment reaction vessel, optimizes the electron transfer path in the friction catalytic degradation process, promotes the separation of electrons and holes, and significantly improves the catalytic degradation rate.

[0019] The technical solution of the present invention will be further illustrated below through specific embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a diagram illustrating the electron transfer mechanism of tribocatalysis in the degradation of organic pollutants in wastewater according to the present invention. Figure 2 This is a schematic diagram illustrating the mechanism of tribocatalytic degradation of organic pollutants in this invention. Figure 3 The graphs show the degradation rates of Rhodamine B dye in Examples 1, 2 and Comparative Example 1 of the present invention. Figure 4 The bar chart shows the degradation rate constant (k value) of Rhodamine B dye for Examples 1, 2 and Comparative Example 1 of the present invention; Figure 5 This is a graph showing the degradation rates of tetracycline hydrochloride (TC), ciprofloxacin (CIP), and cefazolin sodium (CZO) by the tribocatalytic degradation of these substances according to the present invention. Figure 6 A graph showing the degradation rate of Rhodamine B dye in the capture of active species. Figure 7A bar chart showing the degradation rate constant (k value) of Rhodamine B dye in the active species capture experiment. Detailed Implementation

[0021] Example 1 A method for degrading organic pollutants in wastewater through tribocatalytic degradation, specifically: A tungsten metal friction surface with a purity greater than 99% was fixed to the bottom of the wastewater treatment reaction vessel to form a bottom friction interface, which served as an electron-providing layer. A magnetic turntable made of polytetrafluoroethylene was detachably fixed to the lower end of the magnetic stirrer in the wastewater treatment reaction vessel to form an upper friction interface, which served as an electron-plundering layer. Magnetic stirring provided mechanical energy for tribocatalysis. Bi2O3 nanoparticles with a layered structure and a particle size distribution of 0.3~30 μm were selected as the catalyst for tribocatalysis, providing catalytic active centers for the catalytic reaction. Wastewater was injected into the reaction vessel, with the volume of wastewater being 50% of the reaction vessel's volume. The pollutant in the wastewater was Rhodamine B dye, with a concentration of 20 mg / L. Bi2O3 nanoparticles were then added to the wastewater at a concentration of 10 g / L. The wastewater treatment reaction vessel was started, and the magnetic stirrer was turned on. The mixture was stirred continuously at 400 rpm for 2 hours. After the wastewater underwent frictional catalytic degradation, the content of the pollutant Rhodamine B dye met the standard.

[0022] Comparative Example 1 was set up under Example 1. In Comparative Example 1, glass was used to replace the tungsten metal friction surface and was set as the bottom friction interface of the wastewater treatment reaction vessel. Other implementation conditions were the same as those described in Example 1. The magnetic stirrer was turned on and stirred continuously at 400 rpm for 2 hours. The degradation of Rhodamine B dye in the wastewater was recorded.

[0023] Example 2 Example 2 was set up under Example 1. In Example 2, the tungsten metal friction surface was replaced with a titanium metal friction surface and set as the bottom friction interface of the wastewater treatment reaction vessel. All other implementation conditions were the same as those in Example 1. The magnetic stirrer was turned on and stirred continuously at 400 rpm for 2 hours. The degradation of Rhodamine B dye in the wastewater was recorded.

[0024] In both Examples 1 and 2, a metal friction interface was provided at the bottom of the reaction vessel to serve as an electron-donating layer for the degradation of organic pollutants. The electron transition mechanism of the tribocatalytic degradation is as follows: Figure 1 As shown, the triboelectric potential continuously generated at the friction interface provides transition energy for the valence band electrons on the surface of the catalyst Bi2O3, promoting the transition of the valence band electrons (ep) on the Bi2O3 surface. - ) and holes (h + ) Separation, producing h + As the main active species, it can directly degrade organic pollutants; Figure 2 This is a diagram illustrating the mechanism of tribocatalytic degradation of organic pollutants. Figure 2 It is known that, compared with titanium metal friction surfaces, tungsten metal friction surfaces have higher electrical conductivity and lower work function, making it easier for them to interact with Bi2O3 nanoparticle catalysts to form electron injection channels, promoting the rapid generation of active substances such as h⁺, thereby enabling the content of organic pollutants in wastewater to meet the standards in a short period of time.

[0025] The degradation rates of Rhodamine B dye, an organic pollutant in wastewater, by the technical solutions of Examples 1 and 2 and Comparative Example 1 are as follows: Figure 3 As shown in the figure, the degradation rates of Rhodamine B dye using glass, titanium, and tungsten metal friction surfaces as the bottom friction interface were 77.8%, 85.1%, and 98.5%, respectively. The corresponding degradation rate constants (k values) are as follows: Figure 4 As shown, the values ​​are 0.74 h. - ¹、0.90 h - ¹ and 2.21 h - ¹; It can be seen that the degradation rate of Comparative Example 1, which uses glass as the bottom friction interface, is low because glass, as an insulating material, has a weak ability to lose electrons, resulting in a low electron transfer rate during the friction catalysis process. The degradation rate of Example 2, which uses titanium as the bottom friction interface, is lower than that of Example 1 because titanium has lower conductivity than tungsten and its surface is prone to forming an oxide layer, which affects the electron transfer rate. Compared with Comparative Example 1, the technical solution of Example 1 can achieve 98.5% degradation of the pollutant Rhodamine B dye within 2 hours of reaction, with a significant degradation effect. The technical solution of Example 2 can achieve 85.1% degradation of the pollutant Rhodamine B dye within 2 hours of reaction, with a slightly weaker degradation effect than that of Example 1. Therefore, under the same conditions, the technology of using tungsten metal friction surface as the bottom friction interface of the wastewater treatment reaction vessel is more effective.

[0026] Example 3 A method for degrading organic pollutants in wastewater by frictional catalysis, the method comprising: A tungsten metal friction surface with a purity greater than 99% was fixed to the bottom of the wastewater treatment reaction vessel to form a bottom friction interface, serving as an electron-providing layer. A magnetic turntable made of polytetrafluoroethylene was detachably fixed to the lower end of the magnetic stirrer of the wastewater treatment reaction vessel to form an upper friction interface, serving as an electron-plundering layer. Magnetic stirring provided mechanical energy for tribocatalysis. A composition of Bi₂O₃ and ZnO nanoparticles with a layered structure and a particle size distribution of 0.3~30 μm, mixed in a 1:1 mass ratio, was selected as the catalyst for tribocatalysis, providing catalytic active centers for the catalytic reaction. Wastewater was injected into the reaction vessel, with the amount of wastewater not exceeding 50% of the reaction vessel volume. The pollutant in the wastewater was tetracycline hydrochloride (TC), with a concentration of 20 mg / L. The catalyst was added at a dosage of 10 g / L. The wastewater treatment reaction vessel was started, and the magnetic stirrer was turned on. Stirring was carried out continuously at a speed of 400 rpm for 3 hours until the TC content in the wastewater met the standard.

[0027] Example 3.1 was set up under Example 3. In Example 3.1, the wastewater described in Example 3 was replaced with wastewater containing ciprofloxacin (CIP), and the CIP pollution concentration was 20 mg / L. All other implementation conditions were the same as those in Example 3. The magnetic stirrer was turned on and stirred continuously at 400 rpm for 3 hours, and the degradation of CIP in the wastewater was recorded.

[0028] Example 3.2 was set up under Example 3. In Example 3.2, the wastewater described in Example 3 was replaced with wastewater containing cefotaxime sodium (CZO) as the pollutant, and the CZO pollution concentration was 20 mg / L; other implementation conditions were the same as those described in Example 3; the magnetic stirrer was turned on and stirred continuously at 400 rpm for 3 hours, and the degradation of CZO in the wastewater was recorded.

[0029] Examples 3, 3.1, and 3.2 show the degradation rates of TC, CIP, and CZO as follows: Figure 5 As shown in the figure, when the tungsten metal friction surface is selected as the bottom friction interface, in the dual friction interface system formed with the magnetic turntable, through frictional catalysis, significant degradation effects are achieved on TC, CIP and CZO within a 3-hour reaction time, with degradation rates of 98.9%, 94.7% and 61.0%, respectively. Among them, the degradation effect on TC is the most significant.

[0030] Example 4 A copper metal friction surface with a purity greater than 99% was fixed to the bottom of the wastewater treatment reaction vessel to form a bottom friction interface, serving as an electron-providing layer. A magnetic turntable made of ethylene-propylene copolymer was detachably fixed to the lower end of the magnetic stirrer of the wastewater treatment reaction vessel to form an upper friction interface, serving as an electron-plundering layer. Magnetic stirring provided mechanical energy for tribocatalysis. A composition of BaTiO3, ZnO, and TiO2 nanoparticles with a layered structure and a particle size distribution of 0.3–30 μm, mixed in a mass ratio of 3:5:2, was selected as the catalyst for tribocatalysis, providing catalytic active centers for the catalytic reaction. Wastewater was injected into the reaction vessel, with the amount of wastewater not exceeding 50% of the reaction vessel volume. The pollutant in the wastewater was Rhodamine B dye, with a concentration of 20 mg / L. The catalyst was added at a dosage of 1 g / L. The wastewater treatment reaction vessel was started, and the magnetic stirrer was turned on. Stirring was carried out continuously at a speed of 400 rpm for 6 hours. Finally, the wastewater was tested and found that the Rhodamine B dye content met the standard after tribocatalytic degradation.

[0031] Example 5 A chromium metal friction surface with a purity greater than 99% was fixed to the bottom of the wastewater treatment reaction vessel to form a bottom friction interface, serving as an electron-providing layer. A magnetic turntable made of polyvinylidene fluoride was detachably fixed to the lower end of the magnetic stirrer of the wastewater treatment reaction vessel to form an upper friction interface, serving as an electron-plundering layer. Magnetic stirring provided mechanical energy for tribocatalysis. A mixture of Bi2O3, TiO2, ZnO, and Al2O3 nanoparticles with a layered structure and a particle size distribution of 0.3–30 μm, mixed in a mass ratio of 3:1:2:4, served as the catalyst for tribocatalysis, providing catalytic active centers for the catalytic reaction. Wastewater was injected into the reaction vessel, with the amount of wastewater not exceeding 50% of the reaction vessel's volume. The pollutant in the wastewater was tetracycline hydrochloride (TC), with a concentration of 30 mg / L. The catalyst was added at a dosage of 8 g / L. The wastewater treatment reaction vessel was started, and the magnetic stirrer was turned on, continuously stirring at 300 rpm for 5 hours. Finally, after testing, the TC content of the wastewater met the standard after tribocatalytic degradation.

[0032] Active species capture experiment To further clarify that the technical solution of this invention can rapidly degrade organic pollutants in wastewater, an active species capture experiment is provided to capture active species such as hydroxyl radicals (•OH) and electrons (e). - ), superoxide radicals (•O2) - ) and holes (h + This is used to demonstrate the main active species involved in pollutant degradation.

[0033] Experimental setup: The active species scavengers were tert-butanol (TBA), silver nitrate (AgNO3), p-benzoquinone (BQ), or disodium ethylenediaminetetraacetate (EDTA-2Na), respectively, used to capture radicals (•OH) and electrons (e) in the reaction system. - ), superoxide radicals (•O2) - ) and holes (h + ); In Example 1, an active species capture experiment was set up, specifically as follows: TBA, AgNO3, BQ, or EDTA-2Na active species capture agents were added to the reaction system described in Example 1, with each of the four capture agents added at a concentration of 10 mmol / L, resulting in four different reaction systems, denoted as: TBA, AgNO3, BQ, or EDTA-2Na systems; the experiment was conducted under the reaction conditions described in Example 1, and the experimental results are as follows. Figure 6 and Figure 7 As shown, by comparing the degradation rate and degradation rate constant k of the pollutant Rhodamine B dye in each system, the role of different active species in the tribocatalytic reaction is evaluated. like Figure 6 As shown, compared with the degradation rate and degradation rate constant k value of the pollutant Rhodamine B dye in Example 1, the degradation rate of Rhodamine B dye by the TBA, AgNO3, BQ, or EDTA-2Na systems decreased from 98.5% to 95.6%, 87.9%, 95.6%, and 17.1%, respectively, and the corresponding degradation rate constant k value decreased from 0.74 h. -1 They decreased sequentially to 0.73 h. -1 0.69 h -1 0.73 h -1 and 0.06 h -1 Therefore, when h + After being captured by EDTA-2Na, the degradation rate and degradation rate constant k of the pollutant Rhodamine B dye both decreased significantly. Therefore, it can be concluded that h + It is the main active species for the tribocatalytic degradation of organic pollutants; among them, h + It can directly oxidize and degrade organic pollutants, denoted as h. + + Organic matter → CO2 + H2O; In the technical solution of this invention, a large amount of h is generated in a short time in the organic pollutant degradation reaction system. + It accelerates the degradation of organic pollutants.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the inventive essence shall still fall within the protection scope of the present invention.

Claims

1. A method for degrading organic pollutants in wastewater via tribocatalytic degradation, characterized in that, The method specifically includes the following steps: S1. Bottom friction interface setting: Select a metal friction surface and fix it to the bottom of the wastewater treatment reaction vessel to obtain the bottom friction interface, which serves as the electron supply layer; The metal friction surface is made of tungsten, titanium, copper, or chromium metal, and the purity of the tungsten, titanium, copper, or chromium metal is greater than 99%. S2. Setting of upper friction interface: Select a magnetic turntable and fix it to the lower end of the magnetic stirrer of the sewage treatment reaction vessel in a detachable manner to obtain an upper friction interface, which serves as an electron plundering layer; the upper friction interface and the bottom friction interface are set opposite to each other; The magnetic turntable is made of polytetrafluoroethylene, polyvinylidene fluoride, ethylene propylene copolymer, polypropylene, or polyethylene; S3. Catalyst selection: Nanoparticles with layered structures are selected as catalysts for the tribocatalytic reaction; The nanopowder is one or more of Bi2O3, BaTiO3, ZnO, TiO2 or Al2O3 nanopowders mixed in any mass ratio; S4. Inject wastewater into the wastewater treatment reaction vessel improved by S1 and S2, with the injection volume being less than 50% of the volume of the wastewater treatment reaction vessel. Add the catalyst described in S3 at a dosage of 1~10g / L. Start the magnetic stirrer described in S2 and stir continuously at a speed of 200~600rpm for 2~6 hours until the content of organic pollutants in the wastewater meets the standard.

2. The method for degrading organic pollutants in wastewater by frictional catalysis according to claim 1, characterized in that, The metal friction surface described in S1 is made of tungsten metal with a purity greater than 99%.

3. The method for degrading organic pollutants in wastewater by frictional catalysis according to claim 1, characterized in that, The magnetic turntable described in S2 is made of polytetrafluoroethylene.

4. The method for degrading organic pollutants in wastewater by frictional catalysis according to claim 1, characterized in that, The nanopowder mentioned in S3 is Bi2O3 nanopowder.

5. The method for degrading organic pollutants in wastewater by tribocatalysis according to claim 1, characterized in that, The nanoparticles described in S3 have a particle size of 0.3~30 μm.

6. The method for degrading organic pollutants in wastewater by tribocatalysis according to claim 1, characterized in that, The organic pollutants are organic dyes or antibiotics.

Images