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A kind of photocatalytic film and its preparation method and application

A photocatalytic film and composite photocatalytic technology, applied in the field of photocatalytic film with epoxy resin as transition layer, to achieve the effects of simple reaction steps, uniform heating, and tight lamella connection

Active Publication Date: 2022-05-31
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the photocatalytic thin film decorated with nano-silver particles has many potential application prospects; however, there are still certain challenges in the preparation of photocatalytic semiconductor materials with a single pure substance on the surface of the above-mentioned substrate materials.

Method used

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  • A kind of photocatalytic film and its preparation method and application
  • A kind of photocatalytic film and its preparation method and application
  • A kind of photocatalytic film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 0.1M Bi (NO 3 ) 3 ·5H 2 O and 0.1 g of PVP were dissolved in ethylene glycol solution and stirred for 20 minutes to obtain solution A; Mix solution A and solution B for 20 min to obtain mixed solution C.

[0043] (2) The mixed solution C is transferred to a homogeneous hydrothermal kettle in which a polyvinyl chloride rigid board or a 316 stainless steel sheet coated with an epoxy resin polished by 80 mesh silicon carbide sandpaper is placed, and the mixed solution is filled with the reaction kettle. 80% of the volume, the reaction temperature was controlled at 140 ° C, and the reaction was carried out in a homogeneous hydrothermal kettle with a PVC rigid board for 4 h, and a homogeneous hydrothermal kettle with a 316 stainless steel sheet coated with epoxy resin was placed. After the reaction was completed, the sample was taken out, washed 3 times with deionized water, dried at room temperature for 8 h, and a composite photocatalytic film was obtained on t...

Embodiment 2

[0049] The amount of PVP added in Example 1 was changed to 0.0 g. The other preparation conditions are not changed, that is, photocatalytic films decorated with nano-silver particles are obtained on the surfaces of polyvinyl chloride and epoxy resins of different substrates. (see image 3 )

[0050] Depend on image 3 The SEM images of the photocatalytic heterojunction films without adding PVP on the surface of the two polymers can be seen. The results show that even with or without PVP on the surface of the polyvinyl chloride, a uniform petal-like lamellar photocatalytic film of about 1-3 μm is also formed. Description has nothing to do with PVP. When there is no PVP on the surface of the epoxy resin, the photocatalytic film is disorderly stacked, indicating that PVP plays a certain role in the growth of the photocatalytic film on the surface of the epoxy resin.

Embodiment 3

[0052] In Example 1, the hydrothermal in-situ growth time was changed to react in a homogeneous hydrothermal kettle with a polyvinyl chloride rigid board for 3 h, and a homogeneous hydrothermal reaction with a 316 stainless steel sheet coated with epoxy resin was placed. React in the kettle for 1.5h. The other preparation conditions were not changed, that is, photocatalytic films decorated with nano-silver particles were obtained on the surfaces of polyvinyl chloride and epoxy resins of different substrates (see Figure 4 )

[0053] Depend on Figure 4 The SEM images of the photocatalytic heterojunction films of the two polymers hydrothermally grown in situ at different times can be seen. The results show that when the two polymers are hydrothermally grown for 3h and 1.5h respectively, they can also form a relatively small thickness of the film. Uniform photocatalytic films with petal-like and flower-like microspheres indicate that the growth of both films is promoted over t...

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Abstract

The invention belongs to the field of photocatalysis, and specifically relates to a photocatalytic film using epoxy resin as a transition layer to improve the self-cleaning and bactericidal performance of polyvinyl chloride and the antifouling performance of various metal surfaces, as well as its preparation method and application. Bismuth oxide heterojunction photocatalytic films loaded with metal silver were prepared on the surface of polyvinyl chloride or epoxy resin by hydrothermal synthesis in situ growth method and soaking reduction method. When the photocatalytic film is irradiated with visible light, the film generates free radicals such as superoxide, electrons, and holes to kill the organic pollutants and microorganisms attached to the surface of the film, thereby improving the self-cleaning and antibacterial properties of the PVC surface and epoxy resin. Resin as transition layer for metallic antifouling properties. The invention has simple process, easy control and low cost. For polyvinyl chloride, the preparation method of antibacterial film on the surface of polyvinyl chloride has been expanded. In addition, while ensuring the bactericidal performance of polyvinyl chloride, it also imparts self-cleaning performance.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a photocatalytic film with epoxy resin as a transition layer for improving the self-cleaning, bactericidal performance and antifouling performance of various metal surfaces of polyvinyl chloride, and a preparation method and application thereof. Background technique [0002] PVC materials with strong bactericidal properties through direct grafting of quaternary ammonium salt-based and indirect intercalation of nanoparticles, antibacterial polymers and graphene-based materials are used in daily life due to their excellent mechanical properties, low cost and popularity , these membranes have a certain inhibitory effect on microorganisms. However, due to its inherent low surface energy, antibacterial surfaces cannot degrade organic pollutants and cannot prevent the attachment of dust. Likewise, dead bacteria attached to antibacterial surfaces can have the same side effects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68B01J37/10B01J37/16C02F1/30
CPCB01J23/681B01J37/10B01J37/16C02F1/30C02F2305/10C02F2303/04B01J35/23B01J35/39
Inventor 张盾徐雪磊王毅
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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