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Photocatalyst coating with photo-thermal effect and preparation method thereof

A photothermal effect and photocatalyst technology, applied in separation methods, chemical instruments and methods, coatings, etc., can solve the problems of lack of stability of free radicals, poor stability of free radicals, reduced utilization of light energy, etc., and reduce the potential of catalytic reaction. barrier, promote volatilization, increase the effect of relative specific surface area

Inactive Publication Date: 2020-12-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the use of titanium dioxide photocatalyst needs to be excited by ultraviolet light sources that are harmful to the human body, which is inconvenient to use, and extending its application range to the visible light region has become an urgent problem to be solved.
[0007] Second, the light absorption efficiency is low and the utilization rate is low
The existing titanium dioxide photocatalyst absorbs light energy and also reflects most of it, which has limited absorption of light, thereby reducing the utilization rate of light energy, which is a waste of electric energy
[0008] Third, the stability of free radicals is poor and the catalytic efficiency is low
The photocatalysts used in the market are not efficient in converting light energy into free radicals, and free radicals lack stability, which further reduces the catalytic efficiency

Method used

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  • Photocatalyst coating with photo-thermal effect and preparation method thereof
  • Photocatalyst coating with photo-thermal effect and preparation method thereof
  • Photocatalyst coating with photo-thermal effect and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] The present invention also provides a photocatalyst coating with photothermal effect and a preparation method thereof, comprising the following preparation steps:

[0035] (1) 1 weight part is prepared by spraying thickness 3 layers of graphite oxide and the high-temperature sintering of the wrinkled graphene spheres obtained removes defects, and makes the photocatalyst carrier layer, wherein the wrinkled graphene spheres stack thickness is 35 layers, 1 D / I G is 0.005;

[0036] (2) 1 part by weight of wrinkled graphene balls, 0.05 parts by weight of nano-titanium dioxide, 0.02 parts by weight of chloroplatinic acid, and 0.01 parts by weight of sodium borohydride were uniformly stirred and mixed for 1 min, and then dried at room temperature for 0.5 h to obtain a semi-finished coating;

[0037] (3) Transfer the semi-finished coating to 100°C for 6 hours;

[0038] (4) Transfer to an inert gas with a hydrogen volume concentration of 5%, and reduce at 1600° C. for 4 hours...

Embodiment 2

[0043] The present invention also provides a photocatalyst coating with photothermal effect and a preparation method thereof, comprising the following preparation steps:

[0044] (1) 1 weight part crumpled graphene sphere high temperature sintering removes defect, makes photocatalyst carrier layer, wherein, crumpled graphene sphere stack thickness is 35 layers, 1 D / I G is 0.005;

[0045] (2) 1 part by weight of wrinkled graphene balls, 3 parts by weight of nano-titanium dioxide, 0.1 parts by weight of chloroplatinic acid, and 0.05 parts by weight of sodium borohydride were uniformly stirred and mixed for 10 minutes, and then dried at room temperature for 12 hours to obtain a semi-finished coating;

[0046] (3) Transfer the semi-finished coating to 60°C for 2 hours;

[0047] (4) Transfer to an inert gas with a hydrogen volume concentration of 5%, and reduce at 600° C. for 1 hour;

[0048] (5) 100W plasma treatment for 1 min to obtain photocatalyst coating.

[0049](6) The ...

Embodiment 3

[0052] The present invention also provides a photocatalyst coating with photothermal effect and a preparation method thereof, comprising the following preparation steps:

[0053] (1) 1 weight part is removed defect by high-temperature sintering of the wrinkled graphene spheres prepared by spraying thickness 10 layers of graphite oxide, and the photocatalyst carrier layer is obtained, wherein the wrinkled graphene spheres stack thickness is 35 layers, 1 D / I G is 0.005;

[0054] (2) 1 part by weight of wrinkled graphene balls, 2.4 parts by weight of nano-titanium dioxide, 0.05 parts by weight of chloroplatinic acid, and 0.02 parts by weight of sodium borohydride were uniformly stirred and mixed for 8 minutes, and then dried at room temperature for 10 hours to obtain a semi-finished coating;

[0055] (3) Transfer the semi-finished coating to 80°C for 3 hours;

[0056] (4) Transfer to an inert gas with a hydrogen volume concentration of 5%, and reduce at 800° C. for 2 hours;

...

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Abstract

According to the photocatalyst coating with the photo-thermal effect, photo-thermal particles are mixed in the photocatalyst, the photo-thermal effect of the photo-thermal particles is used for achieving the light absorption and heating effects, the catalyst is heated under the illumination condition; on the one hand, volatilization of harmful substances such as formaldehyde is promoted; on the other hand, the decomposition efficiency of the photocatalyst on harmful substances such as formaldehyde is catalyzed in a heating mode, and the full-spectrum utilization rate is greatly increased. Meanwhile, in combination with the hot electron accumulation effect of the folded graphene spheres, the potential barrier of graphene and titanium dioxide is reduced, the light quantum efficiency is improved, and finally, the photocatalyst with the photo-thermal effect applied to visible light and near-infrared light is realized; according to the photocatalyst coating, the light absorption wavelengthis expanded, the catalytic efficiency is improved, a photocatalyst is widely and efficiently applied under visible light; meanwhile, the energy utilization rate is increased, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of heatable photocatalyst materials, and in particular relates to a photocatalyst coating with photothermal effect and a preparation method thereof. Background technique [0002] With the development of society, social materials have been greatly enriched. However, with the extensive use of chemical products, harmful gases such as formaldehyde will inevitably have an impact on the living and working environment, and even induce body diseases, seriously affecting people's health. [0003] Photocatalyst, also called photocatalyst, is a general term for semiconductor materials with photocatalytic function represented by nano-scale titanium dioxide. As early as the 1930s, scientists had discovered photocatalyst materials based on zinc oxide, which degraded harmful substances into harmless substances through photocatalysis, which brought hope for the improvement of human living environment. In particular, the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61B01D53/74B01D53/86B01D53/72
CPCB01D53/74B01D53/8671B01D2255/802B01D2257/708C09D1/00C09D7/61
Inventor 韩金马佳奇冯祎平仇涛磊钟明强
Owner ZHEJIANG UNIV OF TECH