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Method for preparing visible light catalytic degraded plastic

A technology for degrading plastics and photocatalysis, which is applied in the chemical and chemical industry, can solve problems such as limited applications, and achieve the effects of fast degradation rate, less secondary pollution, and total reduction

Inactive Publication Date: 2003-03-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to TiO 2 Due to the limitations of its own structure, it can only use ultraviolet light, which only accounts for about 4% of the solar spectrum, which limits the practical application of this technology.
Therefore, it is imperative to develop plastics with visible light degradation properties, and research in this area has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] For TiO 2 For the preparation of nano-powder, please refer to "Method for preparing titanium dioxide nano-powder by alcoholysis of titanium tetrachloride" (patent number: ZL99100221.0).

[0017] Plastics are polystyrene, polyethylene, polyvinyl chloride, polypropylene, etc.

Embodiment 1

[0019] (1) Preparation of TiO 2 Nano powder

[0020] 99ml of TiCl at room temperature 4 The solution was slowly added dropwise to 350ml of 95% C 2 h 5 OH, stirring while adding dropwise. After 15 minutes of ultrasonic oscillation, a uniform and transparent light yellow solution was obtained. The solution was left to stand in a closed environment for 3 days. Add 300ml of 95% C to the solution dropwise 2 h 5 OH, stand still in a closed environment for gelation reaction, and a transparent sol with a certain viscosity can be obtained. The sol is heat-treated at 80°C, and the solvent can be removed to form a pale yellow xerogel. Pre-body xerogels were heat-treated at 400°C for 3 hours to form TiO 2 Nano powder.

[0021] (2)TiO 2 / Preparation of copper phthalocyanine nanopowder photocatalyst: 0.2g TiO 2 Dissolve in 50ml of absolute ethanol, stir in a constant temperature water bath at 60°C for 30min, and add dropwise 100ml of ethanol solution containing 0.00576g copper ...

Embodiment 2

[0024] TiO 2 Such as embodiment one.

[0025] TiO 2 / Preparation of copper phthalocyanine nanopowder photocatalyst: 0.5g TiO 2 Dissolve in 100ml of absolute ethanol, stir in a constant temperature water bath at 70°C for 35min, and add dropwise 200ml of ethanol solution containing 0.01g copper phthalocyanine. The resulting light blue mixture was centrifuged, washed 5 times with deionized water, and dried to obtain light blue TiO 2 / copper phthalocyanine sample. The sample was grayish blue after grinding. Wherein the content of copper phthalocyanine is 2.0wt.%. UV-Vis spectra showed that TiO 2 / The copper phthalocyanine sample responds in the visible light region of 500-700nm.

[0026] Dissolve 12.0g of polyethylene plastic in 40ml of tetrahydrofuran, then add 0.07g of TiO 2 / Phthalocyanine copper nanopowder. Stir for 60min to make TiO 2 / Copper phthalocyanine diffuses evenly in the solution. This solution was evenly added dropwise on the polytetrafluoroethylene ...

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PUM

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Abstract

There is a method for producing plastic which can be degraded by visible light catalyzing, it uses TiO2 / organic dye as catalyzer, TiO2 / organic dye and plastic are blended and dissolved in four hydrogen furan, following the liquid is dropped onto poly-tetrafluoro ethylene board, it is taken off after it is air-dried naturally, and then the visible light catalyzer degraded plastic is obtained.

Description

technical field [0001] The present invention relates to a kind of utilization TiO 2 The organic dye is a photocatalyst, a method for preparing plastics that can be photocatalytically degraded in the range of visible light, and belongs to the field of chemical engineering. Background technique [0002] Photodegradable plastics can generally be divided into two types: copolymerization type and additive type. The former is a plastic composed of copolymers synthesized from carbon monoxide or carbonyl-containing monomers and ethylene or other olefin monomers. These copolymer molecules are prone to photodegradation because they contain chromophoric groups such as carbonyl groups and weak bonds on the polymer chain. The latter refers to the addition of polymer materials with photosensitizing additives. The photodegradation of the polymer is caused by the photolysis and photochemical reaction of the additive. The above two photodegradation reactions only serve the purpose of dec...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08K3/22C08L23/00C08L25/00C08L101/12
Inventor 朱永法尚静
Owner TSINGHUA UNIV
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