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A kind of heatable photocatalytic coating and preparation method thereof

A technology of heating light and coatings, applied in the field of heatable photocatalyst materials, can solve the problems of lack of stability of free radicals, low efficiency of free radicals, and reduced utilization of light energy, so as to reduce the catalytic reaction barrier and increase the relative specific surface area , Improve the effect of photon quantum efficiency

Active Publication Date: 2021-10-22
天津单从新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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. The absorption of light is limited, which in turn reduces 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 the lack of stability of free radicals further reduces the catalytic efficiency

Method used

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  • A kind of heatable photocatalytic coating and preparation method thereof
  • A kind of heatable photocatalytic coating and preparation method thereof
  • A kind of heatable photocatalytic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A heatable photocatalyst coating is obtained through the following preparation steps:

[0037] (1) 1 weight part of graphene is sintered at high temperature to remove defects, wherein graphene is an AB stack structure, and the stack thickness is 35 layers, I D / I G is 0.005.

[0038] (2) 1 part by weight of the defect-removed graphene prepared in step 1, 0.2 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 to obtain a semi-finished coating . Wherein, the particle size of the nano-titanium dioxide is 3-6 nm.

[0039] (3) Transfer the semi-finished coating to 60°C for 2-6 hours.

[0040] (4) Transfer to an inert gas with a hydrogen volume concentration of 5%, and reduce at 600° C. for 1 h.

[0041] (5) 10W plasma treatment, treatment 1min.

[0042] The semi-finished paint processed in step 5 is un...

Embodiment 2

[0045] A heatable photocatalyst coating is obtained through the following preparation steps:

[0046] (1) 1 weight part of graphene is sintered at high temperature to remove defects, wherein graphene is an AB stack structure, and the stack thickness is 35 layers, I D / I G is 0.005.

[0047] (2) 1 part by weight of the defect-removed graphene prepared in step 1, 2 parts by weight of nano-titanium dioxide, 0.1 part 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. . Wherein, the particle size of the nano-titanium dioxide is 3-6 nm.

[0048] (3) Transfer the semi-finished coating to 100°C for 6 hours.

[0049] (4) Transfer to an inert gas with a hydrogen volume concentration of 5%, and reduce at 1200° C. for 4 hours.

[0050] (5) 100W plasma treatment, treatment 10min.

[0051] The semi-finished paint processed in...

Embodiment 3

[0054] A heatable photocatalyst coating is obtained through the following preparation steps:

[0055] (1) 1 weight part of wrinkled graphene spheres is sintered at high temperature to remove defects, wherein the wrinkled graphene spheres are AB stacked structure, stacking thickness is 35 layers, I D / I G is 0.005.

[0056] (2) After 1 part by weight of the defect-removed wrinkled graphene balls prepared in step 1, 0.5 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 2 minutes, they were dried at room temperature for 1 hour to obtain Paint semi-finished products. Wherein, the particle size of the nano-titanium dioxide is 3-6 nm.

[0057] (3) Transfer the semi-finished coating to 80°C for 3 hours.

[0058] (4) Transfer to an inert gas with a hydrogen volume concentration of 5%, and reduce at 800° C. for 2 h.

[0059] (5) 50W plasma treatment, treatment 5...

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Abstract

The invention provides a heatable photocatalyst coating and a preparation method thereof, the heatable photocatalyst coating comprises a graphene carrier, a titanium dioxide functional layer and carbon nanotubes coated on the surface of the graphene carrier, the graphene carrier and the Described titanium dioxide, carbon nanotube mass ratio are 1: 0.2~2: 0.01-0.05; The I of described graphene carrier D / I G Less than 0.01; graphene has an AB stack structure, and the stack thickness is greater than 30 layers; the thickness of the carbon tube diameter is less than 10 layers. In the present invention, carbon nanotubes are used to connect each graphene carrier to act as a conductive network. In the case of electric heating, on the one hand, it promotes the volatilization of harmful substances such as formaldehyde, and on the other hand, it catalyzes the photocatalyst to formaldehyde and other harmful substances by heating. decomposition efficiency. The heatable photocatalyst coating of the present invention not only expands the light absorption wavelength, but also accelerates the catalytic efficiency, so that the photocatalyst can be widely and efficiently applied under visible light, and at the same time, the energy utilization rate is improved, 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 heatable photocatalyst coating 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 lesions, 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 discovery of Profe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/32
CPCC09D1/00C09D5/32
Inventor 方晓王良王纪乾
Owner 天津单从新材料科技有限公司