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Carbon quantum dot visible light photocatalyst coating and preparation method thereof

A technology of carbon quantum dots and visible light, which is applied in the field of carbon quantum dot visible light photocatalyst coatings and its preparation, can solve the problems of easy aggregation of nanoparticles, uneven spraying, and affecting the performance of photocatalysts, and achieve good film-forming properties and improved storage stability Effect

Inactive Publication Date: 2015-07-22
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, purely using carbon quantum dots as photocatalysts has shortcomings such as easy aggregation of nanoparticles, uneven spraying, and direct impact on the performance of photocatalysts.

Method used

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  • Carbon quantum dot visible light photocatalyst coating and preparation method thereof
  • Carbon quantum dot visible light photocatalyst coating and preparation method thereof
  • Carbon quantum dot visible light photocatalyst coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of carbon quantum dot visible light photocatalyst coating, comprises the raw material of following parts by weight: the aqueous solution 100g (the mass percent that carbon quantum dot accounts for in the carbon quantum dot aqueous solution is 0.5%) of the carbon quantum dot containing heteroatom O doping, benzene Acrylic emulsion 30g, titanium dioxide 5g, dispersant 3g, film forming agent 1g, defoamer 0.5g, wetting agent 0.8g, deionized water 30g. The preparation method of this coating is as follows:

[0035] Accurately weigh deionized water and various additives such as dispersant, defoamer, wetting agent, film-forming agent, etc., add the total weight of deionized water and 5% of the total weight of additives into the stirring device, and then add The titanium dioxide in all parts by weight is stirred for 0.5 hours, and the titanium dioxide slurry is ground by a sander until the fineness reaches 60-12 mesh, then the whole weight of styrene-acrylic emulsion is a...

Embodiment 2

[0037] A kind of carbon quantum dot visible light photocatalyst coating, comprises the raw material of following parts by weight: the aqueous solution 80g (the mass percent that carbon quantum dot accounts for in the carbon quantum dot aqueous solution is 0.1%) of the carbon quantum dot containing heteroatom Se doping, poly Acrylic emulsion 40g, titanium dioxide 2g, dispersant 2g, film forming agent 0.5g, defoamer 0.3g, wetting agent 1g, deionized water 50g. The preparation method of this coating is as follows:

[0038] Accurately weigh deionized water and various additives such as dispersant, defoamer, wetting agent, film-forming agent, etc., add the total weight of deionized water and 5% of the total weight of additives into the stirring device, and then add The whole weight of titanium dioxide is stirred for 1 hour, and the titanium dioxide slurry is ground to a fineness of 100 mesh by a sander, then the whole weight of polyacrylic acid emulsion is added, and the remaining ...

Embodiment 3

[0045] A kind of carbon quantum dot visible light photocatalyst coating, comprises the raw material of following parts by weight: the aqueous solution 50g (the mass percent that carbon quantum dot accounts for in the carbon quantum dot aqueous solution is 0.2%) of the carbon quantum dot containing heteroatom P doping, silicon Acrylic emulsion 50g, titanium dioxide 50g, dispersant 5g, film forming agent 5g, defoamer 1g, wetting agent 2g, antifungal agent 1g, deionized water 40g. The preparation method of this coating is as follows:

[0046] Accurately weigh deionized water and various additives such as dispersant, defoamer, wetting agent, film-forming agent, antifungal agent, etc., and add all weight of deionized water and 5% of all additives to the stirring device Add the titanium dioxide in all parts by weight, stir for 0.8 hours, grind the titanium dioxide slurry with a sander until the fineness reaches 100 mesh, then add the whole weight of styrene-acrylic emulsion, add the...

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Abstract

The invention discloses a carbon quantum dot visible light photocatalyst coating and a preparation method thereof. The coating comprises the following raw materials in parts by weight: 1-100 parts of carbon quantum dot aqueous solution, 5-50 parts of polymer emulsion, 0-50 parts of titanium dioxide, 2-20 parts of assistant and 10-50 parts of deionized water. The invention further discloses the preparation method of the coating. The prepared carbon quantum dot photocatalyst coating can efficiently absorb and utilize visible light (400-800nm) in sunlight; under irradiation of the visible light, singlet oxygen can be efficiently generated; harmful gas in an environment can be comprehensively cleared (a clearance rate is above 90%); harmful microorganisms can be efficiently killed (an antibacterial rate is above 95%); the defect of easy conglobation of nano particles is overcome; the storage stability is improved; and the photocatalyst coating is good in film forming property, has scrubbing resistance, and can be used for a long time.

Description

technical field [0001] The invention relates to the technical field of photocatalyst coatings. More specifically, it relates to a carbon quantum dot visible light photocatalyst coating and a preparation method thereof. Background technique [0002] Studies have shown that many building decoration materials will slowly release small molecular harmful substances such as aldehydes and phenols, which will cause serious harm to human health. In addition, with the increasing industrialization and urbanization of human beings, the air pollution caused by a large amount of harmful gases such as sulfur dioxide, carbon monoxide, and low-valence nitrogen compounds emitted by industrial discharges and automobile exhaust has become increasingly serious. In addition, microbial contamination is one of the causes of various poisonings, infections, allergic diseases and infectious diseases. Therefore, it is urgent to research and develop a kind of all-round, fast and efficient environmenta...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D133/04C09D125/14C09D7/12C09D5/32
Inventor 葛介超汪鹏飞刘卫敏
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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