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Composite photocatalytic coating and preparation method thereof

A technology of composite photocatalysis and coating, which is applied in the field of preparation of composite photocatalysis coating, can solve the problems of low preparation efficiency, limitation, long time and so on, and achieve the effect of enhancing the photocatalytic function

Inactive Publication Date: 2016-06-15
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Whether it is physical vapor deposition, chemical vapor deposition, or other methods such as direct oxidation, sol-gel method, and hydrothermal method, there are various problems in the process of preparing titanium dioxide thin films, such as: physical vapor deposition method Both chemical vapor deposition and chemical vapor deposition methods require large-scale special equipment, and some also require vacuum environment and heating conditions; while the process of direct oxidation method takes a long time, and the process of sol-gel method and hydrothermal method is cumbersome.
In a word, in the process of preparing titanium dioxide film or coating, the above-mentioned preparation process either requires a large investment in equipment cost or low production efficiency, which increases the preparation cost of titanium dioxide film or coating, and plays a role in the practical application of titanium dioxide. very restrictive

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  • Composite photocatalytic coating and preparation method thereof
  • Composite photocatalytic coating and preparation method thereof
  • Composite photocatalytic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Main equipment: 1 planetary ball mill, 1 heat treatment furnace

[0061] Main raw materials and process parameters: micron-sized TiC powder (2-5 microns), Al 2 o 3 Ceramic balls (average particle size 1-5 mm), the mass percentage range of the two is 40%-50% and 60%-50%, the total volume of the two accounts for 20%-50% of the volume of the ball mill tank; planetary ball mill revolution The speed is 100-600 rpm, and the ball milling time is 1-20 hours.

[0062] Preparation of TiC coating:

[0063] The above TiC powder and Al 2 o 3 The ceramic balls are mixed according to the mass ratio and put into the ball mill jar, and then ball milled on the planetary ball mill, relying on the centrifugal force generated by the ball mill to make the TiC powder and Al 2 o 3 The ceramic balls collide and rub against the inner wall of the ball mill jar. Under the action of the collision force and friction force, the TiC powder can 2 o 3 The surface of the ceramic ball is adhered, ...

Embodiment 2

[0072] Mechanical coating: 60g of Al with a diameter of 1mm 2 o 3 Ceramic balls and 40g of TiC powder with a particle size of 2 to 5 μm are charged into a 250ml Al 2 o 3 Then place the ball mill jar on a planetary ball mill for mechanical coating, the revolution speed of the ball mill is set to 480r / min, and the time is set to 10 hours.

[0073] heat treatment:

[0074] Group C-1073K: TiC-coated Al 2 o 3 The ceramic ball is equally divided according to Figure 6 The method shown is placed in a muffle furnace for heat treatment. The heat treatment temperature is set to 1073K, the heating rate is 30K / min, and the maintenance time is 15 hours. After the furnace cools to room temperature, the sample can be taken out of it to complete the sample preparation;

[0075] Group O-1073K: TiC-coated Al 2 o 3 The ceramic balls are directly heat-treated in the atmosphere. The temperature of the heat treatment is 1073K, the heating rate is 30K / min, and the maintenance time is 15 hour...

Embodiment 3

[0086] Mechanical coating: 50g of Al with a diameter of 7-10mm 2 o 3 Ceramic balls and 50g of TiC powder with a particle size of 5-9μm are charged into a 250ml Al 2 o 3 Then place the ball mill jar on a planetary ball mill for mechanical coating, the revolution speed of the ball mill is set to 500r / min, and the time is set to 8 hours.

[0087] heat treatment:

[0088] Group C-1073K: TiC-coated Al 2 o 3 The ceramic ball is equally divided according to Figure 6 The method shown is placed in a muffle furnace for heat treatment. The heat treatment temperature is set to 1273K, the heating rate is 35K / min, and the maintenance time is 12 hours. After the furnace cools to room temperature, the sample is taken out of it to complete the sample preparation;

[0089] Group O-1073K: TiC-coated Al 2 o 3 The ceramic balls are directly heat-treated in the atmospheric environment, the temperature of the heat treatment is 1273K, the heating rate is 35K / min, and the maintenance time is ...

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Abstract

The invention belongs to the field of composite photocatalytic coatings and relates to a composite photocatalytic coating and a preparation method thereof. The preparation method of the composite photocatalytic coating comprises coating a base with a coating material through a ball milling method to obtain a coated body and keeping the coated body at a temperature of 973-1273 K for 2-15h, wherein the base comprises one or more of an Al2O3 ceramic body, a metal body and an alloy body and the coating material comprises one or more of TiC powder, titanium dioxide powder, metal powder and alloy powder. The coating microcosmic structure and even atomic and electronic structures of the composite photocatalytic coating produce substantial change in a mechanical coating process. In thermal oxidation, a series of physical and chemical changes are produced so that a functional coating with a unique microstructure is formed and has substantially higher photocatalysis functions.

Description

technical field [0001] The invention relates to the field of composite photocatalytic coatings, in particular to a method for preparing a composite photocatalytic coating and the prepared composite photocatalytic coating. Background technique [0002] Due to a series of characteristics such as high catalytic performance, stable chemical properties, non-toxicity and low price, titanium dioxide photocatalyst has shown broad application prospects in the fields of air purification, water purification, self-cleaning, antibacterial and antivirus. Although nanoparticles can greatly improve the photocatalytic performance per unit weight due to their large specific surface area, the application of titanium dioxide nanopowders is greatly limited due to poor air permeability and high subsequent recycling costs. Therefore, the applied research of photocatalysis tends to immobilize TiO2 on the substrate, such as thin film / coating. [0003] The preparation methods of titanium dioxide fil...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/755B01J23/80B01J23/889B01J27/22B01J37/02B01J37/08
CPCB01J21/063B01J23/755B01J23/80B01J23/8892B01J27/22B01J37/0217B01J37/0232B01J37/08B01J35/39
Inventor 郝亮鲁云关苏军
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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