High-efficiency sterilization device based on plasma and catalysis cooperation

Abstract

The application discloses a high-efficiency sterilization device based on synergy of plasma and catalysis, which comprises a plasma generating device, wherein the plasma generating device comprises a catalyst plate and a high-voltage discharge electrode; the catalyst plate is formed with honeycomb coal-shaped structure through holes, and the high-voltage discharge electrode is arranged in the through holes; and the catalyst plate is made of an antibacterial catalytic material. The antibacterial catalytic material is a ZnAlOx composite oxide catalyst. The application fuses the antibacterial catalytic material with the plasma technology, discharges in the honeycomb coal-shaped catalyst plate through high-voltage discharge, forms micro-discharge channels in the holes on the surface of the catalyst plate, releases active species, generates composite sterilization factors, and thus effectively sterilizes and kills bacteria. The catalyst plate is made of ZnAlOx composite oxide, the surface of which is loose and porous, the antibacterial performance of which is excellent, and the catalyst plate is high-temperature resistant and suitable for the application environment of the discharge plasma, can be well adapted to the plasma technology, and has better sterilization effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sterilization device, in particular to high-efficiency sterilization device based on synergy of plasma and catalysis. BACKGROUND

[0002] With the continuous improvement of people's environmental protection and health awareness, the inhibition and killing of microbial pathogens are particularly important. In recent years, the research on nanoparticles is more and more in-depth, and the application is more and more widely. Metal and metal oxide nanoparticles have the advantages of large specific surface area, small volume, high catalytic efficiency, etc., and have good antibacterial performance. Ag nanoparticles are one of the most widely used nano-antibacterial materials in the world, but their more extensive application is limited due to high price. ZnO has a wurtzite crystal structure and unique photoelectric properties, good thermal stability, durability, and good antibacterial performance, but the antibacterial performance of ZnO prepared by different methods varies greatly. The current sterilization device is difficult to effectively kill bacteria. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present application provides a high-efficiency sterilization device based on synergy of plasma and catalysis.

[0004] The technical scheme adopted by the present application to solve its technical problems is: a high-efficiency sterilization device based on synergy of plasma and catalysis, comprising a plasma generating device, the plasma generating device comprising a catalyst plate and a high-voltage discharge electrode, the catalyst plate being formed with a honeycomb coal-shaped structure through hole, the high-voltage discharge electrode being arranged in the through hole, and the catalyst plate being made of an antibacterial catalytic material. The antibacterial catalytic material is combined with the plasma technology, and the high-voltage discharge is carried out in the honeycomb coal-shaped catalyst plate to form a micro-discharge channel in the hole on the surface of the catalyst plate, release active species, and generate composite sterilization factors, thereby effectively killing bacteria.

[0005] As a further improvement of the present application: the antibacterial catalytic material is a ZnAlOx composite oxide catalyst. By using ZnAlOx composite oxide as the catalyst plate, the surface is loose and porous, the antibacterial performance is excellent, and it is resistant to high temperature and suitable for the application environment of discharge plasma, which can be well adapted to the plasma technology and further improve the sterilization effect.

[0006] As a further improvement of the present application: the high-voltage discharge electrode material is made of stainless steel, iron or copper.

[0007] As a further improvement of the present application: the preparation method of the ZnAlOx composite oxide catalyst comprises the following steps:

[0008] ① A certain amount of Zn and Al precursors is weighed and dissolved in deionized water;

[0009] ② The mixed solution is moved to a hydrothermal reaction kettle, and reacted at 100-150 DEG C for 10-15 h;

[0010] ③ The mixed solution is moved out, the solvent is evaporated at 60-150 DEG C, and the solid sample is obtained by drying at 80-120 DEG C for 12-13 h;

[0011] ④ The obtained sample is calcined at 300-600 DEG C in a muffle furnace for 4-5 h to obtain a ZnAlOx composite oxide.

[0012] As a further improvement of the application: the precursor salt of Zn is at least one of zinc nitrate and zinc chloride.

[0013] As a further improvement of the application: the precursor salt of Al is at least one of aluminum nitrate, aluminum isopropylate and aluminum sulfate.

[0014] As a further improvement of the application: the step ② is replaced by moving the mixed solution to a hydrothermal reaction kettle, and reacting at 130 DEG C for 14 h.

[0015] As a further improvement of the application: the step ③ is replaced by evaporating the solvent at 130 DEG C, and drying the solid sample at 100 DEG C for 12 h.

[0016] As a further improvement of the application: the step ④ is replaced by calcining the obtained sample at 500 DEG C in a muffle furnace for 4 h to obtain a ZnAlOx composite oxide.

[0017] As a further improvement of the application: the plasma generating device is connected with a high-voltage alternating current power supply.

[0018] As a further improvement of the application: the molar ratio of the precursors of Zn and Al is 1:5-1:10.

[0019] Compared with the prior art, the application has the beneficial effects that:

[0020] 1. The application combines the antibacterial catalytic material with the plasma technology, and discharges through high-voltage discharge in the honeycomb coal-shaped catalyst plate, forms micro-discharge channels in the holes on the surface of the catalyst plate, and generates composite sterilization factors, thereby effectively killing bacteria.

[0021] 2. The application adopts ZnAlOx composite oxide in the catalyst plate, the surface is loose and porous, the antibacterial performance is excellent, discharges plasma on the surface and the through hole of the catalyst plate, thereby generating composite sterilization factors (O2-, O22-, O3,.OH, etc.), releasing active species, and being resistant to high temperature, adapting to the application environment of the discharge plasma, being well adapted to the plasma technology, and having better sterilization effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the internal structure of the present application.

[0023] Reference signs: 1, high-voltage discharge electrode; 2, catalyst plate. DETAILED DESCRIPTION

[0024] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In this document, the term "multiple" means at least two, for example, two, three, and the like, unless expressly specified and limited otherwise.

[0025] Unless specifically stated otherwise, and as can be apparent from the disclosure, the terms "setting," "sleeving," "connecting," "penetrating," "inserting," and the like, are to be construed broadly, for example, as fixedly connected, detachably connected, or integral; as mechanical, electrical, or both; as directly connected, indirectly connected through intervening media, or both; as internal communication between two elements or interaction between two elements, unless specifically stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. Any feature disclosed in the specification (including any appended claims, abstract, and drawings) can be replaced by other equivalent or similarly intended features, unless specifically stated otherwise. That is, each feature is only an example of a series of equivalent or similar features, unless specifically stated otherwise. The present application is further illustrated by the following description and examples in conjunction with the accompanying drawings:

[0026] Please refer to Figure 1 , the high-efficiency sterilization device based on the cooperation of plasma and catalysis includes a plasma generating device, the plasma generating device includes a catalyst plate 2 and a high-voltage discharge electrode 1, the catalyst plate is formed with honeycomb coal-like structure through holes, the high-voltage discharge electrode is arranged in the through holes, and the catalyst plate is made of antibacterial catalytic material.

[0027] The antibacterial catalytic material is combined with the plasma technology, the discharge is carried out in the honeycomb coal-like catalyst plate through high-voltage discharge, the micro-discharge channel is formed in the hole on the surface of the catalyst plate, the active species is released, the composite sterilization factor is generated, and the bacteria are effectively killed.

[0028] The antibacterial catalytic material is a ZnAlOx composite oxide catalyst. By using ZnAlOx composite oxide on the catalyst plate, the surface is loose and porous, the antibacterial performance is excellent, and it is resistant to high temperature, suitable for the application environment of the plasma, can be well adapted to the plasma technology, and further improves the sterilization effect.

[0029] The plasma generating device can select the volume and discharge voltage of the device according to the actual application conditions.

[0030] The high-voltage discharge electrode material is stainless steel, iron or copper.

[0031] The preparation method of the ZnAlOx composite oxide catalyst comprises the following steps:

[0032] ① A certain amount of Zn and Al precursors are weighed and dissolved in deionized water;

[0033] ② The mixed solution is moved to a hydrothermal reaction kettle and reacted at 100-150 DEG C for 10-15 h;

[0034] ③ The mixed solution is removed, the solvent is evaporated at 60-150 DEG C, and the solid sample is dried at 80-120 DEG C for 12-13 h;

[0035] ④ The obtained sample is calcined at 300-600 DEG C in a muffle furnace for 4-5 h to obtain ZnAlOx composite oxide.

[0036] The high-efficiency sterilization device of the application is based on the coupling of plasma technology and catalytic technology, and mainly comprises a high-voltage discharge electrode and a catalyst plate. The catalyst plate is in the shape of honeycomb coal, and the material is ZnAlOx composite oxide catalyst, which has sterilization effect. The high-voltage discharge electrode is built in the through hole, and when used, high pressure is applied to the high-voltage discharge electrode to release active species on the surface and in the channel of the catalyst plate, further improving the sterilization effect.

[0037] In an embodiment of the application, the precursor salt of Zn is at least one of zinc nitrate and zinc chloride.

[0038] In an embodiment of the application, the precursor salt of Al is at least one of aluminum nitrate, aluminum isopropylate and aluminum sulfate.

[0039] In an embodiment of the application, the molar ratio of the precursors of Zn and Al is 1:5-1:10.

[0040] In an embodiment of the application, the step ② is replaced by moving the mixed solution to a hydrothermal reaction kettle and reacting at 130 DEG C for 14 h.

[0041] In one embodiment of the present application, the step ③ is replaced by evaporating the solvent at 130℃, and drying at 100℃ for 12h to obtain a solid sample.

[0042] In one embodiment of the present application, the step ④ is replaced by calcining the obtained sample at 500℃ in a muffle furnace for 4h to obtain the ZnAlOx composite oxide.

[0043] The plasma generating device is connected with a high-voltage alternating current power supply.

[0044] Case 1:

[0045] The high-efficiency sterilization device based on the synergy of plasma and catalysis comprises a plasma generating device, wherein the plasma generating device comprises a catalyst plate and a high-voltage discharge electrode, the catalyst plate is formed with honeycomb coal-shaped structure through holes, the high-voltage discharge electrode is arranged in the through holes, and the catalyst plate is made of an antibacterial catalytic material. The antibacterial catalytic material and the plasma technology are combined, high-voltage discharge is carried out in the honeycomb coal-shaped catalyst plate, micro-discharge channels are formed in the hole channels on the surface of the catalyst plate, active species are released, and composite sterilization factors are generated, so that the bacteria can be effectively sterilized and killed. The antibacterial catalytic material is a ZnAlOx composite oxide catalyst. The ZnAlOx composite oxide is used in the catalyst plate, the surface is loose and porous, the antibacterial performance is excellent, and the ZnAlOx composite oxide is resistant to high temperature and suitable for the application environment of the discharge plasma, so that the ZnAlOx composite oxide can be well adapted to the plasma technology and the sterilization effect is further improved. The plasma generating device is connected with a high-voltage alternating current power supply.

[0046] The high-voltage discharge electrode material is made of stainless steel.

[0047] The preparation method of the ZnAlOx composite oxide catalyst comprises the following steps:

[0048] ① A certain amount of Zn and Al precursors are weighed and dissolved in deionized water;

[0049] ② The mixed solution is moved to a hydrothermal reaction kettle and reacted at 130℃ for 14h.

[0050] ③ The mixed solution is removed, the solvent is evaporated at 130℃, and the solid sample is dried at 100℃ for 12h.

[0051] ④ The obtained sample is calcined at 500℃ in a muffle furnace for 4h to obtain the ZnAlOx composite oxide.

[0052] The precursor salt of Zn is zinc nitrate.

[0053] The precursor salt of Al is aluminum nitrate.

[0054] The molar ratio of the Zn and Al precursors is 1:5.

[0055] Case two:

[0056] The efficient sterilization device based on the synergy of plasma and catalysis comprises a plasma generating device, the plasma generating device comprises a catalyst plate and a high-voltage discharge electrode, the catalyst plate is formed with honeycomb coal-shaped structure through holes, the high-voltage discharge electrode is arranged in the through holes, and the catalyst plate is made of an antibacterial catalytic material. The antibacterial catalytic material is combined with the plasma technology, high-voltage discharge is carried out in the honeycomb coal-shaped catalyst plate, the micro-discharge channel is formed in the hole on the surface of the catalyst plate, the active species are released, the composite sterilization factor is generated, and the bacteria are effectively sterilized. The antibacterial catalytic material is a ZnAlOx composite oxide catalyst. The ZnAlOx composite oxide is used in the catalyst plate, the surface is loose and porous, the antibacterial performance is excellent, and the catalyst plate is resistant to high temperature and suitable for the application environment of the discharge plasma, so that the catalyst plate can be well adapted to the plasma technology and the sterilization effect is further improved. The plasma generating device is connected with a high-voltage alternating current power supply.

[0057] The high-voltage discharge electrode material is iron.

[0058] The preparation method of the ZnAlOx composite oxide catalyst comprises the following steps:

[0059] ① A certain amount of Zn and Al precursors is weighed and dissolved in deionized water;

[0060] ② The mixed solution is moved to a hydrothermal reaction kettle, and reaction is carried out at 100 DEG C for 15 hours;

[0061] ③ The mixed solution is removed, the solvent is evaporated at 60 DEG C, and the solid sample is obtained by drying at 80 DEG C for 13 hours;

[0062] ④ The obtained sample is calcined at 300 DEG C in a muffle furnace for 5 hours to obtain the ZnAlOx composite oxide.

[0063] The precursor salt of Zn is zinc chloride.

[0064] The precursor salt of Al is aluminum isopropoxide.

[0065] The molar ratio of the Zn and Al precursors is 1:10.

[0066] Case three:

[0067] High-efficiency sterilization device based on synergy of plasma and catalysis, comprising a plasma generating device, the plasma generating device comprising a catalyst plate and a high-voltage discharge electrode, the catalyst plate being formed with honeycomb coal-like structure through holes, the high-voltage discharge electrode being arranged in the through holes, and the catalyst plate being made of an antibacterial catalytic material. The antibacterial catalytic material is combined with the plasma technology, high-voltage discharge is carried out in the honeycomb coal-like catalyst plate, micro-discharge channels are formed in the hole channels on the surface of the catalyst plate, active species are released, and composite sterilization factors are generated, so that bacteria can be effectively sterilized. The antibacterial catalytic material is a ZnAlOx composite oxide catalyst. By using ZnAlOx composite oxide as the catalyst plate, the surface is loose and porous, the antibacterial performance is excellent, and it is resistant to high temperature and suitable for the application environment of the discharge plasma, so that the ZnAlOx composite oxide can be well adapted to the plasma technology and the sterilization effect is further improved. The plasma generating device is connected with a high-voltage alternating current power supply.

[0068] The high-voltage discharge electrode material is copper.

[0069] The preparation method of the ZnAlOx composite oxide catalyst comprises the following steps:

[0070] ① A certain amount of Zn and Al precursors are weighed and dissolved in deionized water;

[0071] ② The mixed solution is moved to a hydrothermal reaction kettle and reacted at 150 DEG C for 10 hours;

[0072] ③ The mixed solution is removed, the solvent is evaporated at 150 DEG C, and the solid sample is dried at 120 DEG C for 12 hours;

[0073] ④ The obtained sample is calcined at 600 DEG C in a muffle furnace for 4 hours to obtain ZnAlOx composite oxide.

[0074] The precursor salt of Zn is zinc nitrate.

[0075] The precursor salt of Al is aluminum sulfate.

[0076] The molar ratio of the Zn and Al precursors is 1:8.

[0077] Case four:

[0078] High-efficiency sterilization device based on synergy of plasma and catalysis, comprising a plasma generating device, the plasma generating device comprising a catalyst plate and a high-voltage discharge electrode, the catalyst plate being formed with honeycomb coal-like structure through holes, the high-voltage discharge electrode being arranged in the through holes, and the catalyst plate being made of an antibacterial catalytic material. The antibacterial catalytic material is combined with the plasma technology, high-voltage discharge is carried out in the honeycomb coal-like catalyst plate, micro-discharge channels are formed in the hole channels on the surface of the catalyst plate, active species are released, and composite sterilization factors are generated, so that the bacteria are effectively sterilized. The antibacterial catalytic material is a ZnAlOx composite oxide catalyst. The ZnAlOx composite oxide is used in the catalyst plate, the surface of the ZnAlOx composite oxide is loose and porous, the antibacterial performance is excellent, and the ZnAlOx composite oxide is resistant to high temperature and suitable for the application environment of the discharge plasma, so that the ZnAlOx composite oxide can be well adapted to the plasma technology and the sterilization effect is further improved. The plasma generating device is connected with a high-voltage alternating current power supply.

[0079] The high-voltage discharge electrode material is iron.

[0080] The preparation method of the ZnAlOx composite oxide catalyst comprises the following steps:

[0081] ① A certain amount of Zn and Al precursors are weighed and dissolved in deionized water;

[0082] ② The mixed solution is moved to a hydrothermal reaction kettle and reacted at 140 DEG C for 10 hours;

[0083] ③ The mixed solution is removed, the solvent is evaporated at 80 DEG C, and the solid sample is obtained by drying at 110 DEG C for 12 hours;

[0084] ④ The obtained sample is calcined at 400 DEG C in a muffle furnace for 4 hours to obtain the ZnAlOx composite oxide.

[0085] The Zn precursor salt comprises zinc nitrate and zinc chloride.

[0086] The Al precursor salt comprises aluminum nitrate, aluminum isopropylate and aluminum sulfate.

[0087] The molar ratio of the Zn and Al precursors is 1:6.

[0088] Experimental scheme:

[0089] An alternating current voltage of Vpp=11-15 kV is applied to the sterilization device of the application, and real-time discharge is carried out for 10 minutes, and the sterilization rate of Staphylococcus aureus is tested. Among them, the catalyst plate respectively uses the ZnAlOx composite oxide catalyst of the implementation case one, the implementation case two, the implementation case three and the implementation case four.

[0090] Comparative example:

[0091] The catalyst plate is replaced by a common medium plate, the medium plate in the comparative example is made of ceramic material, and the remaining settings are consistent with the sterilization device in the experimental scheme; the device is applied with an alternating voltage of Vpp=11~15 kV, and real-time discharge is performed for 10 min, and the bacterial killing rate of Staphylococcus aureus is tested.

[0092] The experimental results are as follows:

[0093] Staphylococcus aureus kill rate Example 1 99.99% Example 2 99.98% Example 3 99.99% Example 4 99.99% Comparative Example 78.03%

[0094] As shown in the above table, the Staphylococcus aureus killing rate of the comparative example is low; by using the ZnAlOx composite oxide catalyst to make the catalyst plate, the sterilization device has a higher bacterial killing rate under the same discharge condition, has a better sterilization effect, and can effectively kill bacteria.

[0095] The application combines catalytic materials with plasma technology, utilizes the loose and porous characteristics and antibacterial characteristics of ZnAlOx composite oxide, releases discharge plasma in the surface and through hole of the catalyst plate, thereby generating composite sterilization factors (O2-, O22-, O3, . OH, etc.), releasing active species, and effectively killing bacteria.

[0096] The application effectively couples plasma and antibacterial catalytic materials, and can achieve a stronger sterilization effect.

[0097] In the description of the application, it should be understood that the terms “upper end surface”, “lower end surface”, “top”, “bottom”, “left”, “right” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description of the application, and therefore cannot be understood as a limitation on the actual use direction of the application.

[0098] The above examples are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the application examples, and they should all be covered in the scope of the claims and the description of the application.

Claims

1. A high-efficiency sterilization device based on plasma and catalysis synergy, characterized in that: The application relates to a plasma generating device, which comprises a catalyst plate and a high-voltage discharge electrode, wherein the catalyst plate is formed with honeycomb coal-shaped structure through holes, the high-voltage discharge electrode is arranged in the through holes, and the catalyst plate is made of an antibacterial catalyst material; the antibacterial catalyst material is a ZnAlOx composite oxide catalyst. The application further relates to a preparation method of the ZnAlOx composite oxide catalyst, which comprises the following steps: 1, a certain amount of Zn and Al precursors are weighed and dissolved in deionized water; 2, the mixed solution is moved into a hydrothermal reaction kettle and reacted at 100-150 DEG C for 10-15 h; 3, the mixed solution is moved out, the solvent is evaporated at 60-150 DEG C, and the solid sample is obtained by drying at 80-120 DEG C for 12-13 h; 4, the obtained sample is calcined at 300-600 DEG C in a muffle furnace for 4-5 h to obtain the ZnAlOx composite oxide.

2. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 1, characterized in that: The high-voltage discharge electrode material is stainless steel, iron or copper.

3. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 1, characterized in that: The precursor salt of Zn is at least one of zinc nitrate and zinc chloride.

4. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 3, characterized in that: The precursor salt of Al is at least one of aluminum nitrate, aluminum isopropylate and aluminum sulfate.

5. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 4, characterized in that: In the step 2, the mixed solution is moved into the hydrothermal reaction kettle and reacted at 130 DEG C for 14 h.

6. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 5, characterized in that: In the step 3, the solvent is evaporated at 130 DEG C, and the solid sample is obtained by drying at 100 DEG C for 12 h.

7. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 6, characterized in that: In the step 4, the obtained sample is calcined at 500 DEG C in the muffle furnace for 4 h to obtain the ZnAlOx composite oxide.

8. The high-efficiency sterilization device based on synergistic effect of plasma and catalysis according to claim 1, characterized in that: The molar ratio of the Zn and Al precursors is 1:5-1:10.

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