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Preparation method and application of TiO2 photocatalytic nano-film

A nano-film, photocatalytic technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of uneven film preparation thickness and pore distribution, affecting the catalytic performance of photocatalytic films, acid resistance Alkali corrosion performance is poor and other problems, to achieve the effect of reducing application cost, high stretchability, and energy saving

Inactive Publication Date: 2020-11-20
朱婷婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyethylene film also has some disadvantages as a matrix material.
For example, polyethylene film is resistant to high temperature and has poor acid and alkali corrosion resistance, which leads to certain limitations in the scope of use of the prepared photocatalytic film, and the preparation of polyethylene film is generally prepared by blow molding, and the thickness and pore distribution of the film are not uniform. , affecting the catalytic performance of the photocatalytic film
TiO 2 After the photocatalytic polyethylene film degrades the rhodamine dye 5 times, the film will be deformed to a certain extent, and the degradation performance will be greatly reduced

Method used

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  • Preparation method and application of TiO2 photocatalytic nano-film
  • Preparation method and application of TiO2 photocatalytic nano-film
  • Preparation method and application of TiO2 photocatalytic nano-film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of TiO 2 A method for preparing a photocatalytic nano film, comprising the following steps:

[0033] S1: Add chlorinated polyvinyl chloride (CPVC) to the beaker, and then add N,N-dimethylformamide, where the mass volume ratio of CPVC to N,N-dimethylformamide is 1:20g / mL , stir to make it fully dissolve, add it to the liquid inlet pump of electrospinning, adjust the voltage of the equipment to 29kV, and the injection rate is 12mL / min to obtain a nano film of CPVC.

[0034] S2: TiO 2 Add it to another beaker, then add isopropanol, wherein the mass volume ratio of the added substance is 1:8g / mL, then place the beaker on a heating device, raise the temperature to 30°C and stir for 2h to obtain TiO 2 solution.

[0035]S3: Place the monolayer CPVC nano film obtained in step S1 into a glass dish, and then place the TiO obtained in step S2 2 The solution was slowly drained into a glass dish with a glass rod, and left to stand for 2 hours. The film was taken out, plac...

Embodiment 2

[0038] A kind of TiO 2 A method for preparing a photocatalytic nano film, comprising the following steps:

[0039] S1: Add chlorinated polyvinyl chloride (CPVC) to the beaker, and then add N,N-dimethylformamide, where the mass volume ratio of CPVC to N,N-dimethylformamide is 1:28g / mL , stir to make it fully dissolve, add it to the liquid inlet pump of electrospinning, adjust the voltage of the equipment to 29kV, and the injection rate is 12mL / min to obtain a nano film of CPVC.

[0040] S2: TiO 2 Add it to another beaker, then add isopropanol, wherein the mass volume ratio of the added substance is 1:15g / mL, then place the beaker on a heating device, raise the temperature to 45°C and stir for 8h to obtain TiO 2 solution.

[0041] S3: Place the monolayer CPVC nano film obtained in step S1 into a glass dish, and then place the TiO obtained in step S2 2 The solution was slowly drained into a glass dish with a glass rod, and left to stand for 6 hours. The film was taken out, pl...

Embodiment 3

[0043] A kind of TiO 2 A method for preparing a photocatalytic nano film, comprising the following steps:

[0044] S1: Add chlorinated polyvinyl chloride (CPVC) to the beaker, and then add N,N-dimethylformamide, where the mass volume ratio of CPVC to N,N-dimethylformamide is 1:25g / mL , stir to make it fully dissolve, add it to the liquid inlet pump of electrospinning, adjust the voltage of the equipment to 29kV, and the injection rate is 12mL / min to obtain a nano film of CPVC.

[0045] S2: TiO 2 Add it to another beaker, then add isopropanol, wherein the mass volume ratio of the added substance is 1:10g / mL, then place the beaker on a heating device, raise the temperature to 40°C and stir for 6h to obtain TiO 2 solution.

[0046] S3: Place the monolayer CPVC nano film obtained in step S1 into a glass dish, and then place the TiO obtained in step S2 2 The solution was slowly drained into a glass dish with a glass rod, and left to stand for 4 hours. The film was taken out, pl...

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PUM

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Abstract

The invention discloses a preparation method of a TiO2 photocatalytic nano-film. According to the technical scheme, the preparation method comprises the following steps: dissolving CPVC (chlorinated polyvinyl chloride) in an organic solvent to prepare a CPVC solution, preparing a CPVC nano-film by using an electrostatic spinning method, soaking the nano-film in an alcohol solution of TiO2, and loading TiO2 on the CPVC nano-film to obtain the photocatalytic film. The TiO2 photocatalytic nano-film is uniform in thickness and pore distribution, and the TiO2 photocatalytic nano-film subjected to five degradation cycles of methyl blue still keeps good appearance and photocatalytic performance.

Description

[0001] field of invention [0002] The invention belongs to the field of photocatalytic film preparation, in particular to a TiO 2 Preparation method of photocatalytic nano film and TiO obtained therefrom 2 Applications of photocatalytic nanofilms. Background technique [0003] TiO 2 As a highly efficient photocatalyst, there are mainly three crystal structures of anatase, rutile and brookite, of which only anatase and rutile have higher photocatalytic activity and are used as photocatalysts. . Based on the energy band theory, the energy bands of semiconductor materials can be divided into valence band (VB), conduction band (CB) and forbidden band (Eg). The valence band has low energy and is full of electrons; the conduction band has high energy and is not filled with electrons or is empty; there is a certain gap between the valence band and the conduction band called the forbidden band. When TiO 2 Excited by a light source of a certain intensity, when the absorbed energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/38B01J35/06B01J37/34B01J37/02C02F1/30A62D3/17C02F101/30A62D101/26A62D101/28
CPCB01J31/06B01J31/38B01J37/342B01J37/0201C02F1/30A62D3/17C02F2305/10C02F2101/308A62D2101/26A62D2101/28B01J35/39B01J35/40B01J35/59B01J35/61
Inventor 朱婷婷
Owner 朱婷婷
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