Preparation method of high-entropy material, product and application thereof

Abstract

The application discloses a preparation method of high-entropy material and application thereof and belongs to the technical field of foul gas purification. The high-entropy material is prepared by a sol-gel method with citric acid monohydrate as a chelating agent, with ethanol and ethylene glycol as solvents, and with a cobalt source, an iron source, a manganese source, a copper source and a zinc source as raw materials. A photo-thermal deodorization garbage can is designed based on the high-entropy material and comprises a deodorization shell and a garbage can main body. The deodorization shell is sequentially provided with a bottom plate, a catalytic component and a photo-thermal component from bottom to top. The catalytic component is sequentially provided with a water-proof and air-permeable layer, a heat-insulating and air-permeable layer, an adsorption layer, a fire-retardant layer and a high-entropy photo-thermal catalytic layer prepared from the high-entropy material from bottom to top. The photo-thermal component supplies heat to the catalytic component. The photo-thermal effect is utilized to enhance the purification efficiency of the high-entropy material. The application can effectively reduce the diffusion of hydrogen sulfide foul gas and solve the pollution problem caused by the diffusion of peculiar smell of the garbage can.

Description

Technical Field

[0001] This invention belongs to the field of odor gas purification technology, and particularly relates to a method for preparing a high-entropy material, its products, and applications. Background Technology

[0002] A trash can, also known as a waste bin or garbage can, is a container for holding garbage. Most trash cans have lids to prevent odors from spreading. The odor from trash cans mainly comes from the decay of organic waste and the decomposition by microorganisms. When garbage accumulates in a trash can, especially in hot and humid environments, organic matter will decompose rapidly and release hydrogen sulfide (H2S), a foul-smelling gas with a strong pungent odor, which has a negative impact on the surrounding environment and residents' lives.

[0003] In recent years, as people's requirements for quality of life have continued to improve, some communities have adopted methods such as timed disposal, enclosed design, and air purifiers to reduce the odor of garbage cans. However, the above methods are difficult to achieve effective end-of-pipe treatment of H2S. Chemical washing and biological filtration are currently the main means of treating odorous gases. They have low operating costs and good deodorization effects, but they have the problem of not being suitable for certain application scenarios.

[0004] Catalytic oxidation is an effective method to control the emission of H2S odor from garbage cans. Currently, in the field of H2S catalytic oxidation, metal oxide-based catalysts have superior catalytic activity compared to carbon-based catalysts, but their low-temperature catalytic activity is weaker than that of carbon-based materials. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a method for preparing high-entropy materials, along with the resulting products and applications. This aims to solve the problem of H2S odorous gases from existing garbage bins polluting the environment and affecting people's physical and mental health.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] One of the objectives of this invention is to provide a method for preparing a high-entropy material, comprising the following steps: using citric acid monohydrate as a chelating agent, ethanol and ethylene glycol as solvents, and cobalt, iron, manganese, copper and zinc sources as raw materials, the high-entropy material CoFeMnCuZn is synthesized by a sol-gel method.

[0008] The sol-gel method can prepare materials with highly uniform and fine structures. During synthesis, by controlling the formation of the sol and gel, well-dispersed metal precursors can be obtained, which facilitates the formation of uniformly distributed metal nanoparticles during subsequent heat treatment. During synthesis, citric acid can form stable chelates with metal ions from cobalt, iron, manganese, copper, and zinc sources, helping to maintain the uniform distribution of metal ions in solution and avoiding precipitation and aggregation, thus promoting the formation of uniform sols and gels. Ethanol and ethylene glycol, as solvents, can effectively dissolve organometallic compounds, and polyols such as ethylene glycol can also be used as chelating agents to further enhance the stability of metal ions. The high-entropy material CoFeMnCuZn, composed of multiple elements, can provide more active sites and enhanced electronic interactions, thereby improving its catalytic activity for H2S. Low-temperature activity may stem from the material's high specific surface area and porous structure, which facilitates the adsorption and diffusion of H2S molecules. In summary, the synthesis of high-entropy materials CoFeMnCuZn involves the use of chelating agents, the selection of solvents, the application of the sol-gel method, and the utilization of the high-entropy effect. These factors work together to enable the materials to exhibit excellent catalytic activity, low-temperature activity, and potential for multifunctional applications.

[0009] Furthermore, the molar ratio of the metal elements in the cobalt source, iron source, manganese source, copper source and zinc source is 4:1:1:1:1; wherein the cobalt source, iron source, manganese source, copper source and zinc source are all selected from nitrates, acetates or oxalates.

[0010] The high-entropy material prepared by this invention is composed of a variety of elements in a near equimolar ratio, and has excellent H2S catalytic activity, low-temperature activity and multifunctional applications.

[0011] Furthermore, the specific steps of the sol-gel method include: mixing and stirring the raw materials, chelating agent and solvent to form a sol, and then drying, curing, grinding and calcining the sol.

[0012] Furthermore, the chelating agent is citric acid.

[0013] Furthermore, the drying conditions are: drying at 80°C for 9-12 hours; and / or

[0014] The curing conditions are: curing at 135°C for 10-12 hours; and / or

[0015] The calcination conditions are as follows: the temperature is increased to 450-500℃ at a heating rate of 3-5℃ / min, and calcined at this temperature for 3 hours.

[0016] The second objective of this invention is to provide a high-entropy material prepared using the above-described preparation method.

[0017] The third objective of this invention is to provide a high-entropy photothermal catalytic layer made of the aforementioned high-entropy material.

[0018] The fourth objective of this invention is to provide a method for preparing a high-entropy photothermal catalytic layer, comprising the following steps: coating the high-entropy material onto a foam ceramic substrate, and preparing an integral catalyst by impregnation coating.

[0019] The fifth objective of this invention is to provide a photothermal deodorizing trash can, comprising a deodorizing shell and a trash can body, wherein the deodorizing shell is provided with a bottom plate, a catalytic component and a photothermal component from bottom to top;

[0020] The catalytic component is provided with, from bottom to top, a water-proof and breathable layer, a heat-insulating and breathable layer, an adsorption layer, a flame-retardant layer, and the high-entropy photothermal catalytic layer;

[0021] The photothermal component provides heat to the catalytic component.

[0022] The superior high-entropy catalytic material of this invention, combined with the modification of garbage bin facilities and photothermal effects, can promote the treatment of foul odor problems in garbage bins.

[0023] Furthermore, the photothermal assembly includes at least a double-handled transparent top cover or a double-handled Fresnel top cover fitted over the upper part of the catalytic assembly;

[0024] The base plate is fastened to the photothermal component by nuts and bolts, and the catalytic component is placed in the middle space;

[0025] The base plate 3 is made of glass fiber reinforced plastic with a pore size of 10 mesh.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] 1) The high-entropy material prepared by the present invention adopts the sol-gel method and uses cobalt, iron, manganese, copper and zinc as metal elements. The raw material cost is low, the method is simple, and it is conducive to large-scale preparation.

[0028] 2) The high-entropy material prepared by this invention has excellent H2S catalytic activity at room temperature and can be applied to the room temperature catalytic oxidation of H2S in practical scenarios.

[0029] 3) This invention provides a photothermal deodorization facility for trash cans based on high-entropy materials, which includes a catalytic component and a photothermal component that can efficiently decompose H2S odors. Combined with a stable base plate and a practical trash can body design, it greatly enhances the functionality and environmental value of the trash can. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 The scanning electron microscope image and energy dispersive spectroscopy (EDS) analysis diagram of the high-entropy material CoFeMnCuZn prepared in Example 2 of this invention are shown.

[0032] Figure 2 The X-ray diffraction pattern of the high-entropy material CoFeMnCuZn prepared in Example 2 of this invention;

[0033] Figure 3 The image shows the H2S room temperature catalytic activity of the high-entropy material CoFeMnCuZn prepared in Example 2 of this invention, along with a photograph of the CoFeMnCuZn powder.

[0034] Figure 4 This is a schematic diagram of the overall structure of the deodorization facility of the present invention;

[0035] Figure 5 This is a three-dimensional structural diagram of the deodorization facility of the present invention;

[0036] Figure 6 This is a schematic diagram of the deodorizing housing of the present invention after the rotating module has been removed;

[0037] Figure 7 This is a left rear view of the overall deodorization device of the present invention;

[0038] Figures 4 to 7 In the middle: 1-Odor-removing shell, 2-Garbage can body, 3-Bottom plate, 4-Catalytic component, 5-Photothermal component, 11-Nut, 12-Bolt, 21-Support module, 22-Top extension module, 23-Rotating module, 41-Waterproof and breathable layer, 42-Heat-insulating and breathable layer, 43-Adsorption layer, 44-Flame-retardant layer, 45-High-entropy photothermal catalytic layer. Detailed Implementation

[0039] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0040] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Every smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0041] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0042] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be readily apparent to those skilled in the art. This specification and embodiments are merely exemplary.

[0043] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0044] The high-entropy material provided in this invention is prepared by a sol-gel method, containing five elements: cobalt, iron, manganese, copper, and zinc. The chelating agent is citric acid monohydrate, and the solvents are ethanol and ethylene glycol. After stirring until the sol is stable, it is dried, cured, ground, and calcined to obtain the high-entropy material. This high-entropy material exhibits excellent hydrogen sulfide catalytic activity at room temperature. Based on this high-entropy material, this invention designs a photothermal deodorization facility for garbage cans, including a deodorization shell and a garbage can body. The deodorization shell includes a base plate, a catalytic component, and a photothermal component. The base plate is tightly connected to the photothermal component. Hydrogen sulfide gas inside the garbage can diffuses through the base plate and the catalytic component. The catalytic component, from bottom to top, is sequentially arranged with a water-proof and breathable layer, a heat-insulating and breathable layer, an adsorption layer, a flame-retardant layer, and a high-entropy photothermal catalytic layer. The photothermal effect enhances the purification efficiency of the high-entropy material. This invention can effectively reduce the emission of malodorous hydrogen sulfide gas and solve the pollution problem of odor emission from garbage cans.

[0045] The preparation method of the high-entropy material includes the following steps: using citric acid monohydrate as a chelating agent, ethanol and ethylene glycol as solvents, and cobalt, iron, manganese, copper and zinc sources as raw materials, the high-entropy material CoFeMnCuZn is synthesized by sol-gel method.

[0046] In some embodiments, the molar ratio of the metal elements in the cobalt, iron, manganese, copper, and zinc sources is 4:1:1:1:1. The cobalt, iron, manganese, copper, and zinc sources are cobalt nitrate, ferric nitrate, manganese nitrate, copper nitrate, and zinc nitrate, respectively. In addition to nitrates, acetates or oxalates can also be selected, such as cobalt acetate, ferric acetate, manganese acetate, copper acetate, and zinc acetate; or cobalt oxalate, ferric oxalate, manganese oxalate, copper oxalate, and zinc oxalate.

[0047] In some embodiments, the sol-gel method specifically includes the following steps: mixing and stirring a cobalt source, an iron source, a manganese source, a copper source, a zinc source, a chelating agent, and a solvent to form a sol, and then drying, curing, grinding, and calcining the sol.

[0048] In some embodiments, the drying conditions are: drying at 80°C for 9-12 hours. Exemplarily, in the following embodiments of the present invention, the drying may be selected as drying at 80°C for 9 hours or 12 hours.

[0049] In some embodiments, the curing conditions are: curing at 135°C for 10-12 hours. Exemplarily, in the following embodiments of the present invention, the curing may be selected as curing at 135°C for 10 hours or 12 hours.

[0050] In some embodiments, the calcination conditions are: heating to 450-500°C at a heating rate of 3-5°C / min, and calcining at this temperature for 3 hours. Exemplarily, in the following embodiments of the present invention, the heating rate can be selected as 3°C / min or 5°C / min; the calcination temperature can be selected as 450°C or 500°C. The high-entropy material obtained by calcination exhibits excellent H2S catalytic activity.

[0051] In some embodiments, the ratio of the total mass of the cobalt source, iron source, manganese source, copper source and zinc source to the amount of chelating agent and solvent is (2.926-14.743):(0.42-2.10)g:(101.11-205.46)mL.

[0052] High-entropy materials can be prepared using the above preparation method.

[0053] A method for preparing a high-entropy photothermal catalytic layer using high-entropy materials includes the following steps:

[0054] The high-entropy material was dispersed in deionized water and stirred until homogeneous. Then aluminum sol was added and stirring continued. Finally, nonionic surfactant (nonylphenol polyoxyethylene ether, NP-10) was added and stirred again. After uniform dispersion, a high-entropy slurry was obtained.

[0055] A high-entropy photothermal catalytic layer module is prepared by using foamed ceramic alumina 70*70*15 or silicon carbide 70*70*15 as a carrier, coating the high-entropy slurry onto the carrier multiple times and then drying it.

[0056] In some embodiments, the ratio of the high-entropy material, aluminum sol, deionized water, and NP-10 is 100g:23.3mL:375mL:6mL. The foam ceramic carrier has a pore size of 50ppi.

[0057] To address the problem of foul odors escaping from trash cans, this invention also provides a photothermal deodorizing trash can. This mainly involves integrating high-entropy materials with the trash can, utilizing the photothermal effect to enhance the catalytic oxidation capacity of hydrogen sulfide (H2S) in the high-entropy materials. The specific structure includes: a deodorizing shell 1 and a trash can body 2. The deodorizing shell 1, from bottom to top, is provided with a base plate 3, a catalytic component 4, and a photothermal component 5.

[0058] The catalytic component 4 is provided with a water-proof and breathable layer 41, a heat-insulating and breathable layer 42, an adsorption layer 43, a flame-retardant layer 44 and a high-entropy photothermal catalytic layer 45 from bottom to top.

[0059] The photothermal component 5 heats the catalytic component 4 to promote the catalytic oxidation reaction of odorous gases and the desorption of activated carbon.

[0060] The photothermal component 5 includes at least a double-handled transparent top cover or a double-handled Fresnel top cover fitted on the upper part of the catalytic component 4, for lifting the deodorization housing 1 as a whole and for replacing the material of the catalytic component 4.

[0061] The base plate 3 is fastened to the photothermal component 5 by nuts 11 and bolts 12, and the catalytic component 4 is placed in the middle space.

[0062] The base plate 3 is made of glass fiber reinforced plastic with a pore size of 10 mesh, so that H2S odorous gas can diffuse into the catalytic component 4 and be fixedly connected to the photothermal component 5. The internal material of the catalytic component 4 can be replaced by removing the fasteners and lifting the photothermal component 5 separately.

[0063] The photothermal component 5 allows sunlight to pass through or even concentrate, providing heat to the high-entropy photothermal catalytic layer 45 at the top of the catalytic component 4. This enhances the activity of the high-entropy material in catalytic oxidation of H2S and provides heat for the desorption of the activated carbon adsorption layer.

[0064] The main body 2 of the trash can is different from the commercial outdoor environmentally friendly classified trash can. Its top layer is partially recessed, which is called the support module (21), and is used to support the deodorizing shell 1 that is fastened.

[0065] In some embodiments, the water-proof and breathable layer 41 may be selected from polypropylene nonwoven fabric or polyethylene breathable membrane, used to prevent water vapor and guide H2S odorous gas into the heat-insulating and breathable layer 42; the heat-insulating and breathable layer may be selected from silica aerogel, used to prevent heat transfer from the upper layer downwards and guide H2S odorous gas into the adsorption layer 43, flame-retardant layer 44, and high-entropy photothermal catalytic layer 45; the adsorption layer 43 may be selected from high-iodine-value columnar activated carbon for adsorbing H2S; the flame-retardant layer 44 may be selected from aluminum silicate ceramic material and disposed between the adsorption layer 43 and the high-entropy photothermal catalytic layer 45. The high-entropy photothermal catalytic layer 45 is made of the high-entropy material prepared in this invention.

[0066] Unless otherwise specified, "room temperature" in this invention refers to 20-30℃.

[0067] All raw materials used in this invention were purchased from the market.

[0068] In the following embodiments of the present invention, the volume concentration of ethanol used is 20% and the volume concentration of ethylene glycol used is 30%.

[0069] The technical solution of the present invention will be further illustrated by the following embodiments.

[0070] Example 1

[0071] A method for preparing a high-entropy material includes the following steps:

[0072] (1) Weigh out 1.456 g (5 mmol) of cobalt nitrate hexahydrate, 0.505 g (1.25 mmol) of ferric nitrate nonahydrate, 0.314 g (1.25 mmol) of manganese nitrate tetrahydrate, 0.302 g (1.25 mmol) of copper nitrate trihydrate, and 0.349 g (1.17 mmol) of zinc nitrate hexahydrate and place them in beakers respectively;

[0073] (2) Add 100 mL of ethanol to a beaker and stir for 30 min until evenly dispersed;

[0074] (3) Continue to add 0.42g of citric acid monohydrate powder to the beaker, stir, and stir for 15 minutes after the powder dissolves;

[0075] (5) Continue to add 1.11 mL of ethylene glycol to the beaker, stir for 30 min, then dry it at 80 °C for 9 h and cure it at 135 °C for 10 h to obtain the cured material;

[0076] (6) After grinding the solidified material into powder (15 min), transfer it to a magnetic boat, set the heating rate to 3℃ / min, and calcine at 450℃ for 3 h to obtain the high-entropy material CoFeMnCuZn.

[0077] Example 2

[0078] A method for preparing a high-entropy material includes the following steps:

[0079] (1) Weigh out 7.280g of cobalt nitrate hexahydrate, 2.525g of ferric nitrate nonahydrate, 1.569g of manganese nitrate tetrahydrate, 1.510g of copper nitrate trihydrate, and 1.859g of zinc nitrate hexahydrate into beakers respectively;

[0080] (2) Add 200 mL of ethanol to a beaker and stir for 30 min until evenly dispersed;

[0081] (3) Continue to add 2.10g of citric acid monohydrate powder to the beaker, stir, and stir for 15 minutes after the powder dissolves;

[0082] (5) Continue to add 5.46 mL of ethylene glycol to the beaker, stir for 30 min, then dry it at 80 °C for 12 h and cure it at 135 °C for 12 h to obtain the cured material;

[0083] (6) After grinding the solidified material into powder (15 min), transfer it to a crucible, set the heating rate to 5℃ / min, and calcine at 500℃ for 3 h to obtain the high-entropy material CoFeMnCuZn.

[0084] Figure 1 The images show scanning electron microscope (SEM) images and energy dispersive spectroscopy (EDS) analysis diagrams of the high-entropy material CoFeMnCuZn prepared in Example 2 of this invention. As can be seen from the images, five metallic elements—cobalt, iron, manganese, copper, and zinc—are uniformly distributed on the surface of the high-entropy material.

[0085] Figure 2 The image shows the X-ray diffraction pattern of the high-entropy material CoFeMnCuZn prepared in Example 2 of this invention. As can be seen from the image, the high-entropy material has obvious cobalt tetroxide characteristic peaks, belongs to the spinel configuration, and has high crystallinity.

[0086] Application Example 1

[0087] The catalytic activity of the high-entropy material CoFeMnCuZn in hydrogen sulfide at room temperature was tested under the following conditions: total flow rate 165 mL / min, total H2S 40 ppm, and space velocity 99000 h⁻¹. -1 100 mg of high-entropy material CoFeMnCuZn powder was pressed into tablets at a 40-mesh screen and tested at room temperature.

[0088] Figure 3 The figures show the H2S room temperature catalytic activity of the high-entropy material CoFeMnCuZn prepared in Example 2 of this invention and a picture of the CoFeMnCuZn powder. As can be seen from the figures, the high-entropy material has excellent H2S room temperature catalytic activity. At room temperature and high space velocity, the H2S conversion rate can still be greater than 90% at 700 h.

[0089] Application Example 2

[0090] A method for preparing a high-entropy photothermal catalytic layer includes the following steps:

[0091] (1) Disperse 100g of the high-entropy material prepared in Example 2 into 375mL of deionized water and stir for 30min, then add 23.3mL of aluminum sol and stir for 30min, and finally add 6mL of NP-10 and stir for 10min to obtain a high-entropy slurry;

[0092] (2) Using foamed ceramic alumina 70*70*15 as a carrier (pore size of 50ppi), the high entropy slurry was coated multiple times (the coating thickness reached 12μm. Although a thicker coating can provide better mechanical stability, it may also cause uneven coating thickness in the internal pores due to the increased material thickness) and then dried to obtain a high entropy photothermal catalytic layer component.

[0093] A type of photothermal deodorizing trash can, such as Figures 4-7 As shown, the specific structure includes:

[0094] Deodorizing housing 1;

[0095] Trash can body 2;

[0096] The deodorizing housing 1 is arranged from bottom to top as follows: a base plate 3, a catalytic component 4, and a photothermal component 5. The base plate 3 and the photothermal component 5 are fastened together as a whole by nuts 11 and bolts 12, with the catalytic component 4 placed in the middle space. The base plate 3 is made of glass fiber reinforced plastic with a pore size of 10 mesh, which has excellent corrosion resistance. The pores allow H2S odorous gas to diffuse into the catalytic component 4 and be fixedly connected to the photothermal component 5. The internal material of the catalytic component 4 can be replaced by removing the fasteners and lifting the photothermal component 5 separately. The photothermal component 5 is located on the top layer of the deodorizing housing. In the closed state, the photothermal component 5 can be opened and closed by turning the bolts 12. The photothermal component 5 can use solar radiation energy to provide temperature to the interior, which on the one hand improves the H2S catalytic efficiency of the high-entropy material, and on the other hand partially desorbs the H2S adsorbed by the adsorption layer to achieve cyclic purification.

[0097] The catalytic component 4 contains odorous H2S gas generated by garbage diffused from bottom to top. From bottom to top, it is sequentially configured with a water-proof and breathable layer 41, a heat-insulating and breathable layer 42, an adsorption layer 43, a flame-retardant layer 44, and a high-entropy photothermal catalytic layer 45. The water-proof and breathable layer 41 is tightly fitted to the base plate 3, and the heat-insulating and breathable layer 42 is located above the water-proof and breathable layer 41. During operation, the water-proof and breathable layers 41 and 42 allow odorous gas to pass through into the adsorption layer 43 while simultaneously preventing moisture from the lower garbage bin body 2 from rising upwards and heat generated by the photothermal component 5 from continuously falling downwards. The adsorption layer 43 adsorbs the gas that passes through the water-proof and breathable layers 41 and 42. Small molecule odorous gases 2 are used in conjunction with the high-entropy photothermal catalytic layer 45 to prevent H2S from escaping and improve the odor removal capability of the deodorization facility; the flame retardant layer 44 is located between the adsorption layer 43 and the high-entropy photothermal catalytic layer 45, and is used to prevent light from passing through the high-entropy photothermal catalytic layer during operation, which would cause the adsorption layer 43 to ignite; the high-entropy photothermal catalytic layer 45 is located on the top layer of the catalytic component 4, and the catalyst in the high-entropy photothermal catalytic layer is the high-entropy material prepared in this invention, which uses the photothermal effect to achieve efficient catalytic oxidation removal of H2S odorous gases. The 50ppi carrier pore size is beneficial to increasing the active sites of the catalyst, prolonging the contact time between H2S odorous gases and the catalyst, and improving the odorous gas purification rate.

[0098] The top of the trash can body 2 is equipped with an extension module 22 and a rotating module 23, which themselves support the deodorizing shell 1. In order to facilitate the replacement of internal materials of the catalyst component 4 and further enhance the support, the inward support module 21 of the top part of the trash can body 2 is used to support the fixed deodorizing shell 1. Except for the support module 21, the trash can body 2 is no different from commercial outdoor environmentally friendly classified trash cans and has universality. The trash can body 2 is filled with malodorous gases such as H2S.

[0099] The interior of the trash can produces malodorous gases such as H2S due to the decomposition of garbage. These gases diffuse through the bottom plate, passing sequentially through a water-resistant and breathable layer and a heat-insulating and breathable layer. This prevents moisture from rising and affecting the catalytic effect, and ensures that heat continues to flow downwards, accelerating the diffusion of H2S malodorous gases inside the trash can. H2S is primarily adsorbed by the adsorption layer in dry form. Unadsorbed, saturated, or desorbed malodorous gases further penetrate the flame-retardant layer and enter the high-entropy photothermal catalytic layer, where catalytic oxidation achieves odor purification. The catalytic oxidation capacity is weaker in the absence of sunlight and higher in sunlight. Combined with the adsorption layer, this effectively deodorizes and reduces the environmental pollution caused by H2S malodorous gases.

[0100] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. The application of a high-entropy material in the catalytic degradation of hydrogen sulfide, characterized in that, The preparation method of the high-entropy material includes the following steps: using citric acid monohydrate as a chelating agent, ethanol and ethylene glycol as solvents, and cobalt source, iron source, manganese source, copper source and zinc source as raw materials, the high-entropy material CoFeMnCuZn is synthesized by sol-gel method. The specific steps of the sol-gel method include: mixing and stirring the raw materials, chelating agent and solvent to form a sol, then drying the sol at 80°C for 9-12 hours, curing it at 135°C for 10-12 hours, grinding it, and finally heating it to 450-500°C at a heating rate of 3-5°C / min, and calcining it at this temperature for 3 hours.

2. The application according to claim 1, characterized in that, The molar ratio of the metal elements in the cobalt source, iron source, manganese source, copper source and zinc source is 4:1:1:1:1; wherein the cobalt source, iron source, manganese source, copper source and zinc source are all selected from nitrates, acetates or oxalates.

3. The application of a high-entropy photothermal catalytic layer in the catalytic degradation of hydrogen sulfide, characterized in that, The high-entropy photothermal catalytic layer is made of a high-entropy material prepared in the application described in claim 1.

4. The application of the high-entropy photothermal catalytic layer according to claim 3 in the field of catalytic degradation of hydrogen sulfide, characterized in that, The preparation method of the high-entropy photothermal catalytic layer includes the following steps: coating the high-entropy material onto a foam ceramic substrate, and preparing an integral catalyst by impregnation coating.

5. A photothermal deodorizing trash can, comprising a deodorizing shell (1) and a trash can body (2), characterized in that, The deodorizing housing (1) is provided with a base plate (3), a catalytic component (4) and a photothermal component (5) from bottom to top. The catalytic component (4) is provided with a water-proof and breathable layer (41), a heat-insulating and breathable layer (42), an adsorption layer (43), a flame-retardant layer (44), and a high-entropy photothermal catalytic layer (45) in the application described in claim 3, from bottom to top. The photothermal component (5) heats the catalytic component (4).

6. The photothermal deodorizing trash can according to claim 5, characterized in that, The photothermal component (5) includes at least one double-handled transparent top cover or double-handled Fresnel top cover fitted on the upper part of the catalytic component (4); The base plate (3) is fastened to the photothermal component (5) by nuts (11) and bolts (12), and the catalyst component (4) is placed in the middle space. The base plate (3) is made of glass fiber reinforced plastic with a pore size of 10 mesh.

Images