An electrolysis device, an electrolysis module comprising the same and a cleaning apparatus

Abstract

This invention provides an electrolysis device, an electrolysis module comprising the same, and a cleaning device, relating to the field of cleaning apparatus technology. The electrolysis device provided by this invention contains a dandelion-like catalyst. Using this electrolysis device to electrolyze water, a high current density can be achieved at a relatively low voltage, significantly improving the generation efficiency of micro / nano bubbles and reducing energy consumption. Simultaneously, it can also generate active oxygen substances, achieving a dual effect of decontamination and sterilization.

Description

Technical Field

[0001] This invention relates to the field of cleaning device technology, and more particularly to an electrolytic device, an electrolytic module comprising the same, and a cleaning equipment. Background Technology

[0002] Micro- and nanobubbles refer to bubbles with diameters ranging from approximately 10 micrometers to several hundred nanometers. These bubbles, falling between micrometer and nanobubbles in size, possess characteristics such as large relative surface area, slow rise velocity, self-pressurization and dissolution, surface charging, generation of numerous free radicals upon rupture, high mass transfer efficiency, and high gas solubility. The bursting of micro- and nanobubbles generates significant energy, which can remove dirt and grime from the surface of clothing fibers, effectively cleaning stains.

[0003] Compared with traditional detergent cleaning methods, micro-nano bubble cleaning has many significant advantages. For example, micro-nano bubble cleaning can reduce the use of chemical detergents, or even eliminate the use of chemical detergents, thereby avoiding the harm to the human body from chemical residues on clothes and tableware, reducing the adverse impact of wastewater on the environment, and making it more green and environmentally friendly. Micro-nano bubble cleaning is extremely fast and far more efficient than traditional detergent cleaning.

[0004] Currently, common methods for generating micro / nanobubbles include pressurized dissolved gas (PDG), electrolysis, and ultrasonic methods. Pressurized PDG involves dissolving gas in water at high pressure until it is saturated, then releasing the gas through depressurization to form micro / nanobubbles. This method typically uses equipment such as circulating pumps, working pressure dissolved gas tanks, and safety relief valves. While widely used, it consumes a significant amount of energy. Electrolysis produces hydrogen and oxygen by electrolyzing water, forming micro / nanobubbles. Although it allows for precise control of bubble size and quantity, it is energy-intensive, and has high electrode and maintenance costs. Ultrasonic methods utilize the principle of ultrasonic cavitation, creating cavitation bubbles in an aqueous solution under negative acoustic pressure, thus forming micro / nanobubbles. While this method can generate micro / nanobubbles, it suffers from drawbacks such as inability to operate continuously, low efficiency, and high cost.

[0005] The methods for generating micro- and nano-bubbles mentioned above each have their own advantages and disadvantages, and further improvements are needed to promote the practical application of micro- and nano-bubble cleaning methods. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an electrolytic device, an electrolytic module comprising the same, and a cleaning apparatus. The electrolytic device contains a dandelion-like catalyst. Utilizing this device to electrolyze water enables the achievement of high current density at a relatively low voltage, significantly improving the generation efficiency of micro / nano bubbles and reducing energy consumption. Simultaneously, it generates active oxygen substances, achieving both decontamination and sterilization effects.

[0007] In a first aspect, the present invention provides an electrolysis device comprising at least one catalyst layer, wherein the catalyst layer is made of a dandelion-like catalyst.

[0008] In some embodiments of the present invention, the driving voltage of the electrolytic device is 4V or higher, preferably 4-7V.

[0009] In some embodiments of the present invention, the diameter of the bubbles generated by the electrolysis device for water electrolysis is 7-13 μm.

[0010] In some embodiments of the present invention, the dandelion-like catalyst comprises a nickel foam matrix and a metal hydroxide coated on the surface of the nickel foam matrix, wherein the metal hydroxide has a dandelion-like nanoarray structure.

[0011] The chemical formula of the metal hydroxide is M x Ni y Co 1-x-y (OH)2;

[0012] Wherein, element M is selected from one or more of Ru, Pt, Ir and Pd;

[0013] 0≤x≤0.15, 0≤y≤0.90.

[0014] In some embodiments of the present invention, the thickness of the catalyst layer is 0.2-0.3 mm.

[0015] In some embodiments of the present invention, the electrolysis device further includes an anode plate and a cathode plate, and the catalyst layer is disposed between the anode plate and the cathode plate.

[0016] In some embodiments of the present invention, at least one of the anode plate and the cathode plate has a through hole in the region opposite to the catalyst layer.

[0017] In some embodiments of the present invention, the electrolysis device further includes an ion exchange membrane disposed between the anode plate and the cathode plate.

[0018] In some embodiments of the present invention, the ion exchange membrane is a proton exchange membrane or an anion exchange membrane.

[0019] In some embodiments of the present invention, the thickness of the ion exchange membrane is 50-130 μm.

[0020] In some embodiments of the present invention, the membrane electrode further includes a sealing gasket.

[0021] In a second aspect, the present invention provides an electrolysis module, the electrolysis module comprising at least one electrolysis device as described in the first aspect.

[0022] In some embodiments of the present invention, the electrolysis module further includes a housing with an internal cavity, and the electrolysis device is disposed in the cavity.

[0023] In some embodiments of the present invention, the outer casing is provided with a through hole, or the outer casing is provided with a water inlet and a water outlet.

[0024] In some embodiments of the present invention, the electrolysis module further includes an anode tab and a cathode tab, wherein the anode tab is connected to the anode plate of the electrolysis device, and the cathode tab is connected to the cathode plate of the electrolysis device.

[0025] Thirdly, the present invention provides an application of the electrolytic device as described in the first aspect or the electrolytic module as described in the second aspect in decontamination and sterilization.

[0026] Fourthly, the present invention provides a cleaning device comprising the electrolysis module as described in the third aspect.

[0027] In some embodiments of the present invention, the electrolysis module is disposed on the water inlet line of the cleaning equipment, the bottom of the cleaning zone and / or the side wall of the cleaning zone.

[0028] In some embodiments of the present invention, the cleaning equipment includes a garment processing device or a dishwasher.

[0029] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art:

[0030] The electrolysis device provided in this embodiment of the invention contains a dandelion-like catalyst. Using this electrolysis device to electrolyze water, a high current density can be achieved at a lower voltage, which significantly improves the generation efficiency of micro-nano bubbles and reduces energy consumption. At the same time, it can also generate active oxygen substances, achieving the dual effects of decontamination and sterilization. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0032] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 SEM image and energy distribution of elements of the dandelion-like catalyst prepared in Example 1 of this invention;

[0034] Figure 2 SEM image and energy distribution of elements of the dandelion-like catalyst prepared in Example 2 of this invention;

[0035] Figure 3 This is a SEM image of the commercial Pt / C catalyst used in Preparation Example 3 of this invention;

[0036] Figure 4 The effect and principle diagram of the catalysts prepared for Preparation Example 2 and Preparation Example 3 generating micro-nano bubbles during the electrolysis of tap water;

[0037] Figure 5 The images show tap water before and during electrolysis using the dandelion-like catalyst prepared in Preparation Example 2.

[0038] Figure 6 The effect of using the dandelion-like catalyst prepared in Preparation Example 2 to degrade dyes by immersion electrolysis is shown in the figure.

[0039] Figure 7 This is a diagram showing the effect of using the electrolysis module provided in Example 2 to degrade dyes in a flow electrolysis manner. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The inventors' previous research (Constructing Heteronuclear Bridging Atmospheres toward Bifunctional Electrocatalysis, Minkai Qin, et al., ACS Catal. 2024, 14, 8414-8426) reported a catalyst Ru@Ni with a dandelion-like structure. x Co 1-x (OH)₂ was used as an electrolysis catalyst, and 5-hydroxymethylfurfural was employed as a substrate. An organic oxidation reaction replaced the oxygen evolution reaction, achieving environmentally friendly hydrogen production. Further research by the inventors revealed that this dandelion-like catalyst can catalyze the electrolysis of water to produce micro-nano bubbles and active oxygen substances, showing promise for applications in cleaning and sterilizing clothing, tableware, etc., hence this invention.

[0045] In a first aspect, embodiments of the present invention provide an electrolysis device, the electrolysis device comprising at least one catalyst layer, the catalyst layer being made of a dandelion-like catalyst.

[0046] The dandelion-like catalyst described in this invention embodiment has a unique dandelion-like nanoarray structure. The inventors, through research, have discovered that it has the following advantages:

[0047] First, according to the Wenzel or Cassie-Baxter model, the surface roughness factor can amplify the hydrophilicity or hydrophobicity of a surface: for hydrophilic surfaces, the roughness factor makes the surface more hydrophilic; for hydrophobic surfaces, the roughness factor makes the surface more hydrophobic. The dandelion-like nanoarray structure of the catalyst in this embodiment of the invention makes its surface extremely rough, thus giving the catalyst strong hydrophilicity and gas-repellency. At the liquid-solid interface, when buoyancy and adhesion reach equilibrium, a critical value is reached to drive bubbles away from the surface. The critical value of the bubble release radius on the solid surface is proportional to the root of the liquid surface tension and the sine of the gas-solid contact angle. Therefore, the suitable hydrophilicity and gas-repellency of the catalyst in this embodiment of the invention enables the in-situ generation of micro- and nano-bubbles during electrocatalytic water splitting.

[0048] Secondly, the dandelion-like nanoarray structure of the catalyst gives it an ultra-high specific surface area, which can greatly increase the contact area with water and improve the energy efficiency of electrolysis.

[0049] Third, the catalyst's dandelion-like nanoarray structure contains numerous sharp ends. According to the physical tip effect, at electrostatic equilibrium, there is no net residual charge inside the conductor; the charge is only distributed on the outer surface. Furthermore, the sharper the location on the outer surface, the greater the charge density and the stronger the surrounding electric field. Under high field strength, this structure can accelerate mass transfer, enrich reactants, and improve catalytic efficiency. In other words, the catalyst described in this embodiment can achieve a high current density at a relatively low voltage, significantly improving electrocatalytic efficiency, increasing the generation efficiency of micro / nanobubbles, and reducing energy consumption.

[0050] Fourth, during the water electrolysis process, the catalyst can also catalyze water splitting to generate a large number of active oxygen substances (such as hypochlorite, ozone, OH radicals, etc.), thereby achieving the dual effects of decontamination and sterilization.

[0051] In addition to the aforementioned advantages of dandelion-like catalysts, the electrolysis device provided in this embodiment of the invention also features a hydrophilic and gas-repellent surface characteristic that enables the formation of a dense water film on the catalyst surface, creating a dense hydrogen bond network. This surface water layer can resist the entry of hydrated cations, thereby reducing the formation of cathode scale to a certain extent and improving the stability of the catalyst.

[0052] It should be noted that the term "electrolysis of water" in this embodiment of the invention does not specifically refer to the electrolysis of pure water, but also includes the electrolysis of tap water, salt water, and other water-based solutions, as long as the oxidation-reduction reaction during the electrolysis process involves water molecules. For ease of description, this type of electrolysis process is collectively referred to as electrolysis of water in this embodiment of the invention.

[0053] In some embodiments of the present invention, the driving voltage of the electrolytic device is 4V or higher, for example, it can be 4V, 4.5V, 5V, 5.5V, 6V, 6.5V, 7V, 7.5V, 8V, 9V, 10V, 12V, 13V or 15V, etc.; preferably 4-7V.

[0054] The electrolysis device provided in this embodiment of the invention can generate a large number of micro-nano bubbles and active oxygen substances through water splitting when the voltage reaches 4V or above, thus achieving good cleaning and sterilization effects. However, if the voltage is too high, it will waste energy on the one hand, and on the other hand, the excessive generation of active oxygen substances may cause colored clothing to fade. Therefore, the driving voltage of the electrolysis device in this embodiment of the invention is preferably 4-7V.

[0055] In some embodiments of the present invention, the diameter of the bubbles generated by the electrolysis device for water electrolysis is 7-13 μm.

[0056] In some embodiments of the present invention, the dandelion-like catalyst comprises a nickel foam matrix and a metal hydroxide coated on the surface of the nickel foam matrix, wherein the metal hydroxide has a dandelion-like nanoarray structure.

[0057] The chemical formula of the metal hydroxide is M x Ni y Co 1-x-y (OH)2;

[0058] Wherein, element M is selected from one or more of Ru, Pt, Ir and Pd;

[0059] 0 ≤ x ≤ 0.15, for example, it can be 0, 0.01, 0.02, 0.03, 0.05, 0.06, 0.08, 0.1, 0.11, 0.12, 0.13, 0.14 or 0.15, etc.;

[0060] 0≤y≤0.90, for example, it can be 0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85 or 0.9, etc.

[0061] In this embodiment of the invention, the dandelion-like catalyst can be prepared by the following method:

[0062] Cobalt nitrate, nickel nitrate, chloride of optional element M, and urea are dissolved in ultrapure water (UP) to obtain a mixed solution; the mixed solution is transferred to a stainless steel autoclave lined with polytetrafluoroethylene, nickel foam is added, and a hydrothermal reaction is carried out to obtain the dandelion-like catalyst.

[0063] The total concentration of cobalt, nickel and element M in the mixed solution can be 20-40 mmol / L.

[0064] The concentration of urea in the mixed solution can be 0.1 mol / L.

[0065] The hydrothermal reaction temperature can be 120℃, and the time can be 12 hours. Before use, it is preferable to clean the nickel foam first. The cleaning method is as follows: first, ultrasonically clean it in anhydrous ethanol for 20 minutes, then ultrasonically treat it with ultrapure water for 20 minutes, and then dry it.

[0066] In some embodiments of the present invention, the thickness of the catalyst layer is 0.2-0.3 mm; for example, it can be 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm or 0.3 mm, etc.

[0067] In some embodiments of the present invention, the electrolysis device further includes an anode plate and a cathode plate, and the catalyst layer is disposed between the anode plate and the cathode plate.

[0068] In some embodiments of the present invention, at least one of the anode plate and the cathode plate has a through hole in the region opposite to the catalyst layer.

[0069] In this embodiment of the invention, by providing through holes in the region of the anode plate and / or cathode plate opposite to the catalyst layer, it is beneficial for water to enter, allowing water to fully contact the dandelion-like catalyst, thereby improving electrolysis efficiency and the generation efficiency of micro-nano bubbles.

[0070] In some embodiments of the present invention, the electrolysis device further includes an ion exchange membrane disposed between the anode plate and the cathode plate.

[0071] Based on the principle of field ionization, ion exchange membranes are used as ion transport channels to simultaneously achieve the dissociation of hard water and soft water, thereby reducing solution resistance and electrolysis voltage.

[0072] In some embodiments of the present invention, the ion exchange membrane is a proton exchange membrane or an anion exchange membrane.

[0073] In some embodiments of the present invention, the thickness of the ion exchange membrane is 50-130 μm; for example, it can be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm or 130 μm, etc.

[0074] In some embodiments of the present invention, the membrane electrode further includes a sealing gasket.

[0075] In a second aspect, the present invention provides an electrolysis module, the electrolysis module comprising at least one electrolysis device as described in the first aspect.

[0076] In some embodiments of the present invention, the electrolysis module further includes a housing with an internal cavity, and the electrolysis device is disposed in the cavity.

[0077] In some embodiments of the present invention, the outer shell is provided with through holes. Electrolysis modules with this structure can be directly placed in water for electrolysis. Water can enter the interior of the outer shell through the through holes, contact the electrolysis device, and undergo electrolysis. The generated micro-nano bubbles and active oxygen substances can also enter the water through the through holes, achieving cleaning and sterilization of clothing, tableware, etc.

[0078] In some embodiments of the present invention, the outer casing is provided with a water inlet and a water outlet. This structure is a flow-through structure, and the electrolysis module with this structure can be set in the water inlet path. Water enters the interior of the outer casing from the water inlet, comes into contact with the electrolysis device, and undergoes electrolysis. The generated micro-nano bubbles and active oxygen substances flow out from the water outlet with the water flow, thereby achieving the cleaning and sterilization of clothes, tableware, etc.

[0079] In some embodiments of the present invention, the electrolysis module further includes an anode tab and a cathode tab, wherein the anode tab is connected to the anode plate of the electrolysis device, and the cathode tab is connected to the cathode plate of the electrolysis device.

[0080] Thirdly, the present invention provides an application of the electrolytic device as described in the first aspect or the electrolytic module as described in the second aspect in decontamination and sterilization.

[0081] Fourthly, the present invention provides a cleaning device comprising the electrolysis module as described in the third aspect.

[0082] In some embodiments of the present invention, the electrolysis module is disposed on the water inlet line of the cleaning equipment, the bottom of the cleaning zone and / or the side wall of the cleaning zone.

[0083] In some embodiments of the present invention, the cleaning equipment includes a garment processing device or a dishwasher.

[0084] To make the technical problems solved, technical solutions, and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application. 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.

[0085] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with conventional techniques or conditions in the art, techniques or conditions described in the literature, or product instructions. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0086] Preparation Example 1

[0087] This preparation example demonstrates the preparation of a dandelion-like catalyst, following the steps below:

[0088] The nickel foam (3cm×2cm×0.15cm) was first ultrasonically cleaned in anhydrous ethanol for 20 minutes, then ultrasonically treated with ultrapure water for 20 minutes, and then dried.

[0089] 0.3 mmol of cobalt nitrate hexahydrate (Co(NO3)2·6H2O), 0.3 mmol of nickel nitrate hexahydrate (Ni(NO3)2·6H2O), and 2 mmol of urea were dissolved in 20 mL of ultrapure water to obtain a mixed solution;

[0090] The mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene, and cleaned nickel foam was added. The mixture was then subjected to hydrothermal reaction at 120°C for 12 hours to obtain the dandelion-like catalyst.

[0091] Preparation Example 2

[0092] This preparation example demonstrates the preparation of a dandelion-like catalyst, following the steps below:

[0093] The nickel foam (3cm×2cm×0.15cm) was first ultrasonically cleaned in anhydrous ethanol for 20 minutes, then ultrasonically treated with ultrapure water for 20 minutes, and then dried.

[0094] 0.3 mmol of cobalt nitrate hexahydrate (Co(NO3)2·6H2O), 0.3 mmol of nickel nitrate hexahydrate (Ni(NO3)2·6H2O), 0.06 mmol of ruthenium chloride trihydrate (RuCl3·3H2O), and 2 mmol of urea were dissolved in 20 mL of ultrapure water to obtain a mixed solution.

[0095] The mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene, and cleaned nickel foam was added. The mixture was then subjected to hydrothermal reaction at 120°C for 12 hours to obtain the dandelion-like catalyst.

[0096] Preparation Example 3

[0097] This preparation example demonstrates the preparation of a Pt / C catalyst-nickel foam composite material, the preparation method of which is as follows:

[0098] Weigh 5.0 mg of Pt / C catalyst (purchased from Alfaeza Chemicals Ltd., Pt content 20 wt%) and 1.0 mg of carbon black, mix with 20 μL of 5% Nafion solution and 480 μL of anhydrous ethanol, and sonicate for 30 minutes to obtain a uniformly dispersed mixed solution; take 100 μL of the above mixed solution and drop it onto nickel foam (3 cm × 2 cm × 0.15 cm), and dry it at room temperature to obtain Pt / C catalyst-nickel foam composite material.

[0099] Structural and morphological characterization

[0100] The surface morphology of the dandelion-like catalysts prepared in Preparation Examples 1-2 and the Pt / C catalyst used in Preparation Example 3 were observed using scanning electron microscopy (SEM).

[0101] The test results of the dandelion-like catalysts prepared in Preparation Example 1 and Preparation Example 2 are as follows: Figure 1 and Figure 2 As shown, figures a and b are SEM images at different magnifications, and figure c is the elemental energy distribution (EDX mapping). The SEM image of the Pt / C catalyst used in Preparation Example 3 is shown below. Figure 3 As shown.

[0102] from Figure 1 and Figure 2 It can be seen that the catalysts prepared in Preparation Examples 1 and 2 exhibit a dandelion-like nanoarray structure on their surface, and the energy distribution maps of the elements indicate that the corresponding elements were successfully introduced into the catalysts. Figure 3 It can be seen that the Pt / C catalyst used in Preparation Example 3 has a spherical particle morphology on its surface.

[0103] Example 1

[0104] This embodiment provides an electrolysis device, including an anode plate, an anode catalyst layer, an ion exchange membrane, a cathode catalyst layer and a cathode plate stacked in sequence, and a sealing gasket, the sealing gasket surrounding the sides of the anode catalyst layer, the ion exchange membrane and the cathode catalyst layer;

[0105] The ion exchange membrane is a German Fumasep FAA-3-50 anion exchange membrane with a thickness of 50 μm.

[0106] Both the anode catalyst layer and the cathode catalyst layer are composed of the dandelion-shaped catalyst prepared in Preparation Example 1, with a thickness of 0.25 mm and a surface size of 2 cm × 2 cm.

[0107] The preparation method of the electrolytic device in this embodiment is as follows:

[0108] The thickness of the two dandelion-shaped catalysts prepared in Preparation Example 1 was hot-pressed to 0.25 mm using a hot press, and they were used as the anode catalyst layer and the cathode catalyst layer, respectively. The anion exchange membrane was activated by standing in an electrolyte aqueous solution for 12 h before use. Then, they were stacked in sequence and fixed together to assemble an electrolytic device.

[0109] This embodiment also provides an electrolysis module, including an electrolysis device, a housing, an anode tab, and a cathode tab;

[0110] The outer shell has an internal cavity, and the electrolytic device is disposed in the cavity;

[0111] The outer casing is provided with a water inlet and a water outlet;

[0112] The anode tab is connected to the anode plate of the electrolytic device, and the cathode tab is connected to the cathode plate of the electrolytic device.

[0113] Example 2

[0114] This embodiment provides an electrolysis device and an electrolysis module. The only difference from Example 1 is that the dandelion-like catalyst prepared in Example 1 is replaced with the dandelion-like catalyst prepared in Example 2.

[0115] Comparative Example 1

[0116] This comparative example provides an electrolysis device and an electrolysis module, which differ from Example 1 only in that the dandelion-like catalyst prepared in Example 1 is replaced with the Pt / C catalyst-nickel foam composite material prepared in Example 3.

[0117] Performance testing

[0118] 1. The effect of generating micro-nano bubbles

[0119] To facilitate a direct observation of the effect of catalyst electrolysis on the generation of micro-nano bubbles, the anode catalyst layer and cathode catalyst layer prepared in the examples or comparative examples were directly used as a pair of electrodes to conduct water electrolysis experiments. The specific steps are as follows:

[0120] The anode and cathode catalyst layers were placed in tap water, respectively. A DC voltage of 100 mA was applied to both layers, and nanobubbles at the same location were recorded using a high-speed camera. The results are as follows: Figure 4As shown, Figures a and b are the effect and principle diagrams of micro-nano bubbles generated by the Pt / C catalyst-nickel foam composite material prepared in Preparation Example 3 during the electrolysis of tap water, respectively; Figures c and d are the effect and principle diagrams of micro-nano bubbles generated by the dandelion-like catalyst prepared in Preparation Example 2 during the electrolysis of tap water, respectively. The states of tap water before and during electrolysis using the dandelion-like catalyst prepared in Preparation Example 2 are shown below. Figure 5 As shown.

[0121] from Figure 4 It can be seen that the bubble diameter produced by the dandelion-like catalyst prepared in Preparation Example 2 during the electrolysis of tap water is approximately 10 micrometers, which is significantly smaller than the bubble produced by the Pt / C catalyst-nickel foam composite material prepared in Preparation Example 3. Figure 5 It can be seen that the tap water was clear and transparent before electrolysis, while the tap water was milky white during the electrolysis process using the dandelion-like catalyst prepared in Preparation Example 2. This is because a large number of micro-nano bubbles generated during electrolysis dissolved in the water.

[0122] 2. The effect of generating reactive oxygen species

[0123] The effectiveness of the catalyst in generating active oxygen substances through water electrolysis was tested using both immersion and flow-through electrolysis methods. The specific steps are as follows:

[0124] Immersion method: The anode and cathode catalyst layers prepared in Example 2 were used directly as a pair of electrodes, immersed in tap water containing 1 mg / L of red dye, and a DC voltage was applied to achieve a current of 500 mA for electrolysis for 10 min. The state of the solution before, during, and after electrolysis was observed, and the results are as follows. Figure 6 As shown.

[0125] Flow-through type: Using the electrolysis module provided in Example 2, tap water containing 1 mg / L of red dye was introduced into the inlet of the electrolysis module at a flow rate of 2 L / min. Simultaneously, a 5V voltage was applied to the anode and cathode of the electrolysis module for electrolysis. The electrolyzed solution was collected from the outlet of the electrolysis module. The state of the solution before and after electrolysis was observed, and the results are as follows: Figure 7 As shown.

[0126] from Figure 6 It can be seen that a large number of micro-nano bubbles are generated during the immersion electrolysis process, and the solution appears milky white; after electrolysis, the solution becomes clear and transparent overall, and the color becomes significantly lighter, indicating that the dye is degraded by the reactive oxygen species generated during electrolysis. Figure 7 It can be seen that the solution color also becomes significantly lighter after flow electrolysis, indicating that the dye is degraded by the reactive oxygen species generated during electrolysis.

[0127] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrolytic device, characterized in that, The electrolysis device includes at least one catalyst layer, and the material of the catalyst layer includes a dandelion-like catalyst.

2. The electrolytic device according to claim 1, characterized in that, The driving voltage of the electrolysis device is above 4V, preferably 4-7V; The diameter of the bubbles generated by the electrolysis device is 7-13 μm.

3. The electrolytic device according to claim 1 or 2, characterized in that, The dandelion-like catalyst comprises a nickel foam matrix and a metal hydroxide coated on the surface of the nickel foam matrix, wherein the metal hydroxide has a dandelion-like nanoarray structure. The chemical formula of the metal hydroxide is M x Ni y Co 1-x-y (OH)2; Wherein, element M is selected from one or more of Ru, Pt, Ir and Pd; 0≤x≤0.15, 0≤y≤0.90; Preferably, the thickness of the catalyst layer is 0.2-0.3 mm.

4. The electrolytic device according to any one of claims 1-3, characterized in that, The electrolysis device further includes an anode plate and a cathode plate, and the catalyst layer is disposed between the anode plate and the cathode plate; Preferably, at least one of the anode plate and the cathode plate has a through hole in the region opposite to the catalyst layer.

5. The electrolytic device according to claim 4, characterized in that, The electrolysis device further includes an ion exchange membrane disposed between the anode plate and the cathode plate; Preferably, the ion exchange membrane is a proton exchange membrane or anion exchange membrane; Preferably, the thickness of the ion exchange membrane is 50-130 μm.

6. The electrolytic device according to any one of claims 1-5, characterized in that, The membrane electrode also includes a sealing gasket.

7. An electrolysis module, characterized in that, The electrolysis module includes at least one electrolysis device as described in any one of claims 1-6.

8. The electrolysis module according to claim 7, characterized in that, The electrolysis module also includes a housing, the housing having an internal cavity, and the electrolysis device disposed in the cavity; Preferably, the outer casing is provided with a through hole, or the outer casing is provided with a water inlet and a water outlet; Preferably, the electrolysis module further includes an anode tab and a cathode tab, wherein the anode tab is connected to the anode plate of the electrolysis device, and the cathode tab is connected to the cathode plate of the electrolysis device.

9. The application of an electrolytic device as described in any one of claims 1-6 or an electrolytic module as described in claim 7 or 8 in decontamination and sterilization.

10. A cleaning device, characterized in that, The cleaning equipment includes the electrolysis module as described in claim 7 or 8; Preferably, the electrolysis module is disposed on the water inlet line of the cleaning equipment, at the bottom of the cleaning zone and / or on the side wall of the cleaning zone; Preferably, the cleaning equipment includes a garment processing device or a dishwasher.

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