CN114573898B - Novel photocatalyst composite sterilization material and preparation method and application thereof - Google Patents
Novel photocatalyst composite sterilization material and preparation method and application thereof Download PDFInfo
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- CN114573898B CN114573898B CN202210240261.5A CN202210240261A CN114573898B CN 114573898 B CN114573898 B CN 114573898B CN 202210240261 A CN202210240261 A CN 202210240261A CN 114573898 B CN114573898 B CN 114573898B
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- 239000002131 composite material Substances 0.000 title claims abstract description 77
- 239000000463 material Substances 0.000 title claims abstract description 75
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 70
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 70
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 30
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 25
- 239000004033 plastic Substances 0.000 claims abstract description 16
- 229920003023 plastic Polymers 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- -1 polyethylene Polymers 0.000 claims description 21
- 235000013305 food Nutrition 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 24
- 238000005491 wire drawing Methods 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 238000004513 sizing Methods 0.000 abstract description 5
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 12
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000001580 bacterial effect Effects 0.000 description 7
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 235000019253 formic acid Nutrition 0.000 description 6
- 210000002421 cell wall Anatomy 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 241000191967 Staphylococcus aureus Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/14—Carbides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/22—Carbides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0063—Granulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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Abstract
The invention discloses a novel photocatalyst composite sterilization material, and a preparation method and application thereof, wherein the preparation method comprises the following steps: placing bismuth metal in a vacuum furnace, heating to a preset temperature, adding excessive graphene powder into the vacuum furnace, and maintaining the preset temperature for a preset time to obtain a mixed product, wherein the mixed product comprises bismuth carbide and graphene powder; adding the mixed product into a molten plastic material and mixing to obtain composite slurry; and (3) wiredrawing and cutting the composite sizing agent into particles to obtain the novel photocatalyst composite sterilization material. The novel photocatalyst composite sterilization material provided by the invention not only can sterilize, but also has the function of removing formaldehyde in the air, is a healthy sterilization environment-friendly material, and has wide market application value.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a novel photocatalyst composite sterilization material, and a preparation method and application thereof.
Background
Bacterial contamination in foods is a very serious type of contamination that can cause significant injury to human health, even life threatening, once the food is infected by pathogenic bacteria, especially staphylococcus aureus. Staphylococcus aureus is a gram-positive bacterium, and has thicker cell walls and stronger stress resistance. Traditional methods for killing staphylococcus aureus include heat sterilization, radiation sterilization, chemical sterilization and the like. These sterilization methods have corresponding defects, such as heat sterilization and radiation sterilization which consume more energy, and chemical sterilization is easy to cause environmental pollution. Therefore, new products with bactericidal or antibacterial utility are receiving increasing attention.
The prior art is still in need of improvement and development.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a novel photocatalyst composite sterilization material, a preparation method and application thereof, and aims to solve the problems that the existing sterilization material has few types, has single sterilization effect and is easy to pollute the environment.
The technical scheme of the invention is as follows:
a preparation method of a novel photocatalyst composite sterilization material comprises the following steps:
placing bismuth metal in a vacuum furnace, heating to a preset temperature, adding excessive graphene powder into the vacuum furnace, and maintaining the preset temperature for a preset time to obtain a mixed product, wherein the mixed product comprises bismuth carbide and graphene powder;
adding the mixed product into a molten plastic material and mixing to obtain composite slurry;
and (3) wiredrawing and cutting the composite sizing agent into particles to obtain the novel photocatalyst composite sterilization material.
The preparation method of the novel photocatalyst composite sterilization material comprises the steps of setting the preset temperature to 700-900 ℃ and setting the preset time to 20-40min.
The preparation method of the novel photocatalyst composite sterilization material comprises the following steps of: 2-1:10.
the preparation method of the novel photocatalyst composite sterilization material comprises the following steps of: 1-1000:5.
the preparation method of the novel photocatalyst composite sterilization material comprises the step of preparing a plastic material from one or more of polyethylene, polypropylene and polyethylene terephthalate.
The invention relates to a novel photocatalyst composite sterilization material, which is prepared by adopting a preparation method of the novel photocatalyst composite sterilization material.
The novel photocatalyst composite sterilization material is applied to preparing food packaging bags.
The beneficial effects are that: the novel photocatalyst composite sterilization material prepared by the invention contains bismuth carbide, under the condition of illumination, bismuth in the bismuth carbide can release an electron, a cavity is formed, a large amount of bismuth carbide in the composite sterilization material can release a large amount of electrons and form a large amount of cavities, and thus a nano sieve is formed; the released electrons can combine with oxygen in the air to form negative oxygen ions, and the holes can abstract electrons of water vapor in the air to form hydroxyl radicals; the hydroxyl radical has strong oxidizing property, and can oxidize bacterial cell walls to cause bacterial death; meanwhile, the hydroxyl radical can attack formaldehyde in the air to generate the hydroxyl radical and water, the hydroxyl radical is combined with negative oxygen ions to generate formic acid, and the formic acid is easily deprived of electrons by the nano sieve and finally becomes water and carbon dioxide harmless to human bodies. That is, the novel photocatalyst composite sterilization material provided by the invention not only can sterilize, but also has the function of removing formaldehyde in the air, is a healthy sterilization environment-friendly material, and has wide market application value.
Drawings
FIG. 1 is a flow chart of a preparation method of a novel photocatalyst composite sterilization material.
Fig. 2 is a schematic structural diagram of the novel photocatalyst composite sterilization material of the present invention.
Detailed Description
The invention provides a novel photocatalyst composite sterilization material, a preparation method and application thereof, and aims to make the purposes, technical schemes and effects of the invention clearer and more definite, and the invention is further described in detail below. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram showing a preparation method of a novel photocatalyst composite sterilization material according to the present invention, which includes the steps of:
s10, placing bismuth metal in a vacuum furnace, heating to a preset temperature, adding excessive graphene powder into the vacuum furnace, and maintaining the preset temperature for a preset time to obtain a mixed product, wherein the mixed product comprises bismuth carbide and graphene powder;
s20, adding the mixed product into a molten plastic material and mixing to obtain composite slurry;
s30, drawing the composite slurry and cutting the composite slurry into particles to obtain the novel photocatalyst composite sterilization material.
In the invention, excessive graphene powder is reacted with bismuth metal to obtain a mixed product composed of bismuth carbide and residual graphene, the mixed product is uniformly mixed with a molten plastic material, and the mixed product is subjected to wiredrawing granulation treatment to obtain the novel photocatalyst composite sterilization material shown in figure 2. The novel photocatalyst composite sterilization material contains bismuth carbide, under the condition of illumination, the bismuth in the bismuth carbide can release an electron, and a cavity is formed, and a large amount of bismuth carbide in the composite sterilization material can release a large amount of electrons and form a large amount of cavities, namely a nano sieve; the released electrons can combine with oxygen in the air to form negative oxygen ions, and the holes can abstract electrons of water vapor in the air to form hydroxyl radicals; the hydroxyl radical has strong oxidizing property, and can oxidize bacterial cell walls to cause bacterial death; meanwhile, the hydroxyl radical can attack formaldehyde in the air to generate the hydroxyl radical and water, the hydroxyl radical is combined with negative oxygen ions to generate formic acid, and the formic acid is easily deprived of electrons by the nano sieve and finally becomes water and carbon dioxide harmless to human bodies. That is, the novel photocatalyst composite sterilization material provided by the invention not only can sterilize, but also has the function of removing formaldehyde in the air, is a healthy sterilization environment-friendly material, and has wide market application value.
Furthermore, the novel photocatalyst composite sterilization material prepared by the invention also contains graphene, the graphene and the plastic material form a concrete-like structure, the graphene is similar to stones and is used as a framework, the plastic material is similar to cement and is used as a matrix, and the mechanical strength of the prepared composite sterilization material can be improved by about 30% compared with that of single plastic particles.
In some embodiments, after bismuth metal is placed in a vacuum furnace and heated to 700-900 ℃, excess graphene powder is added into the vacuum furnace and maintained at 700-900 ℃ for 20-40min, at this time, bismuth metal and graphene powder fully react to generate bismuth carbide, and the bismuth carbide and the residual excess graphene powder form a mixed product.
In some embodiments, the mass ratio of bismuth metal to graphene powder is 1:2-1:10. in this embodiment, if the mass ratio of bismuth metal to graphene powder is greater than 1:2, the bismuth metal is excessive and bismuth carbide cannot be sufficiently generated; if the mass ratio of the bismuth metal to the graphene powder is less than 1:10, the graphene powder remains too much after fully reacting with the bismuth metal, so that the bismuth carbide in the finally prepared novel photocatalyst composite sterilization material is less, and the sterilization capability is weakened.
In some embodiments, the mass ratio of plastic material to graphene in the composite slurry is 1000:1-1000:5. in the proportion range, the finally prepared novel photocatalyst composite sterilization material can be ensured to have better mechanical strength.
In some embodiments, the plastic material is one or more of polyethylene, polypropylene, and polyethylene terephthalate, but is not limited thereto.
In some embodiments, a novel photocatalyst composite sterilization material is also provided, which is prepared by adopting the preparation method of the novel photocatalyst composite sterilization material. The novel photocatalyst composite sterilization material provided by the invention contains bismuth carbide, under the condition of illumination, bismuth in the bismuth carbide can release an electron, a cavity is formed, a large amount of bismuth carbide in the composite sterilization material can release a large amount of electrons and form a large amount of cavities, and thus a nano sieve is formed; the released electrons can combine with oxygen in the air to form negative oxygen ions, and the holes can abstract electrons of water vapor in the air to form hydroxyl radicals; the hydroxyl radical has strong oxidizing property, and can oxidize bacterial cell walls to cause bacterial death; meanwhile, the hydroxyl radical can attack formaldehyde in the air to generate the hydroxyl radical and water, the hydroxyl radical is combined with negative oxygen ions to generate formic acid, and the formic acid is easily deprived of electrons by the nano sieve and finally becomes water and carbon dioxide harmless to human bodies. That is, the novel photocatalyst composite sterilization material provided by the invention not only can sterilize, but also has the function of removing formaldehyde in the air, is a healthy sterilization environment-friendly material, and has wide market application value. The novel photocatalyst composite sterilization material prepared by the invention also contains graphene, the graphene and the plastic material form a concrete-like structure, the graphene is similar to stones and is used as a framework, the plastic material is similar to cement and is used as a matrix, and the mechanical strength of the prepared composite sterilization material can be improved by about 30% compared with that of single plastic particles.
In some embodiments, the invention also provides an application of the novel photocatalyst composite sterilization material, wherein the novel photocatalyst composite sterilization material is used for preparing food packaging bags. In this embodiment, the novel photocatalyst composite sterilization material has bismuth carbide, has the function of a photocatalyst, and can effectively remove formaldehyde odor and kill part of bacteria under the condition of illumination, so that the novel photocatalyst composite sterilization material is particularly suitable for preparing products such as food packaging bags and the like.
The invention is further illustrated by the following examples:
example 1
A preparation method of a novel photocatalyst composite sterilization material comprises the following steps:
after placing bismuth metal in a vacuum furnace and heating to 700 ℃, adding excessive graphene powder into the vacuum furnace, and heating for 40min at 700 ℃, wherein the mass ratio of the bismuth metal to the graphene powder is 1:2, reacting to obtain a mixed product, wherein the mixed product comprises bismuth carbide and graphene powder;
adding the mixed product into melted polyethylene and mixing to obtain composite slurry, wherein the mass ratio of polyethylene to graphene powder in the composite slurry is 1000:1, a step of;
and (3) wiredrawing and cutting the composite sizing agent into particles to obtain the novel photocatalyst composite sterilization material.
Example 2
A preparation method of a novel photocatalyst composite sterilization material comprises the following steps:
placing bismuth metal in a vacuum furnace, heating to 800 ℃, adding excessive graphene powder into the vacuum furnace, and heating for 30min at 800 ℃, wherein the mass ratio of the bismuth metal to the graphene powder is 15, and reacting to obtain a mixed product, and the mixed product comprises bismuth carbide and the graphene powder;
adding the mixed product into melted polypropylene and mixing to obtain composite slurry, wherein the mass ratio of polypropylene to graphene powder in the composite slurry is 1000:3, a step of;
and (3) wiredrawing and cutting the composite sizing agent into particles to obtain the novel photocatalyst composite sterilization material.
Example 3
A preparation method of a novel photocatalyst composite sterilization material comprises the following steps:
after bismuth metal is placed in a vacuum furnace and heated to 900 ℃, adding excessive graphene powder into the vacuum furnace, and heating for 20min at 900 ℃, wherein the mass ratio of the bismuth metal to the graphene powder is 1:10, reacting to obtain a mixed product, wherein the mixed product comprises bismuth carbide and graphene powder;
adding the mixed product into melted polyethylene terephthalate and mixing to obtain composite slurry, wherein the mass ratio of the polyethylene terephthalate to the graphene powder in the composite slurry is 1000:5, a step of;
and (3) wiredrawing and cutting the composite sizing agent into particles to obtain the novel photocatalyst composite sterilization material.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (4)
1. The preparation method of the novel photocatalyst composite sterilization material is characterized by comprising the following steps:
placing bismuth metal in a vacuum furnace, heating to a preset temperature, adding excessive graphene powder into the vacuum furnace, and maintaining the preset temperature for a preset time to obtain a mixed product, wherein the mixed product comprises bismuth carbide and graphene powder;
adding the mixed product into a molten plastic material and mixing to obtain composite slurry;
drawing wires and cutting the composite slurry into particles to prepare the novel photocatalyst composite sterilization material;
the preset temperature is 700-900 ℃ and the preset time is 20-40min;
the mass ratio of the bismuth metal to the graphene powder is 1:2-1:10;
in the composite slurry, the mass ratio of the plastic material to the graphene powder is 1000:1-1000:5.
2. the method for preparing a novel photocatalyst composite sterilization material according to claim 1, wherein the plastic material is one or more of polyethylene, polypropylene and polyethylene terephthalate.
3. A novel photocatalyst composite sterilization material, which is characterized in that the novel photocatalyst composite sterilization material is prepared by the preparation method of any one of claims 1-2.
4. The application of the novel photocatalyst composite sterilization material is characterized in that the novel photocatalyst composite sterilization material in claim 3 is used for preparing food packaging bags.
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| CN114573898B true CN114573898B (en) | 2023-08-25 |
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2022
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| CN104437548A (en) * | 2013-09-12 | 2015-03-25 | 华东师范大学 | Visible light photocatalytic film and preparation method thereof and lighting lamp with visible light photocatalytic film |
| WO2016039055A1 (en) * | 2014-09-12 | 2016-03-17 | 三菱化学株式会社 | Photocatalyst laminate, method for manufacturing same, photocatalyst module, and hydrogen producing method |
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