Ozone gas sensitive coating and preparation method thereof

An ozone gas and coating technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problems of unstable coating structure, affecting the gas sensitivity of the coating, etc., and achieve low production cost and high performance. Superior, reduce the effect of spray granulation process

Active Publication Date: 2016-07-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, during the plasma spraying process, due to the high temperature, the nanocrystalline grains tend to grow, and the resulting coating structure is unstable, which will affect the gas sensitivity of the coating.

Method used

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  • Ozone gas sensitive coating and preparation method thereof
  • Ozone gas sensitive coating and preparation method thereof
  • Ozone gas sensitive coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0059] In this embodiment, the base material is a ceramic tube with a diameter of 2 mm and a pore diameter of about 1 mm, and the surface of the base is nano-TiO 2 -WO 3 The thickness of the nanocomposite coating is 1000nm, and the coating is well combined with the matrix material; the surface of the coating is a porous structure, mainly composed of nano-sized TiO 2 and WO 3 grains are stacked, where WO 3 The grain size is around 10nm, TiO 2 The grain size range is about 25nm, and the specific preparation method of the ozone gas-sensitive coating is as follows:

[0060] 1. Preparation of nano-TiO 2 -WCl 6 Precursor solution: Fully dissolve the surface dispersant and deionized water, fully dissolve tungsten hexachloride and absolute ethanol, then mix the above two solutions, and stir them magnetically for 30 minutes to make them evenly mixed. A certain amount of nano P25 is added to the above homogeneous mixture, and the pH value is adjusted with ammonia water to obtain a...

Embodiment 2

[0068] In this embodiment, the base material is a ceramic tube with a diameter of 2 mm and a pore diameter of about 1 mm, and the surface of the base is nano-TiO 2 -WO 3 The thickness of the nanocomposite coating is 300nm, and the coating is well combined with the matrix material; the surface of the coating is a porous structure, mainly composed of nano-sized TiO 2 and WO 3 grains are stacked, where WO 3 The grain size is around 15nm, TiO 2 The grain size range is about 30nm, and the specific preparation method of the ozone gas-sensitive coating is as follows:

[0069] 1. Preparation of nano-TiO 2 -WCl 6 Precursor solution: Fully dissolve the surface dispersant and deionized water, fully dissolve tungsten hexachloride and absolute ethanol, then mix the above two solutions, and stir them magnetically for 30 minutes to make them evenly mixed. Add a certain amount of anatase phase nano-TiO to the above homogeneous mixture 2 , and adjust the pH value with ammonia water to o...

Embodiment 3

[0077] In this embodiment, the base material is a ceramic tube with a diameter of 2 mm and a pore diameter of about 1 mm, and the surface of the base is nano-TiO 2 -WO 3 The thickness of the nanocomposite coating is 1000nm, and the coating is well combined with the matrix material; the surface of the coating is a porous structure, mainly composed of nano-sized TiO 2 and WO 3 grains are stacked, where WO 3 Grain size at 15.18nm, TiO 2 The grain size range is 25nm, and the specific preparation method of the ozone gas-sensitive coating is as follows:

[0078] 1. Preparation of nano-TiO 2 -WCl 6 Precursor solution: Fully dissolve the surface dispersant and deionized water, fully dissolve tungsten hexachloride and absolute ethanol, then mix the above two solutions, and stir them magnetically for 30 minutes to make them evenly mixed. A certain amount of nano P25 is added to the above homogeneous mixture, and the pH value is adjusted with ammonia water to obtain a spray coating...

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Abstract

The invention discloses a preparation method of an ozone gas sensitive coating.A WC16 solution doped with nanometer TiO2 serves as a spraying raw material, a flame-spray process is adopted, the spraying raw material is sprayed and deposited onto a base body, and the ozone gas sensitive coating with the thickness being 200-1500 nm is obtained; nanometer TiO2 at least contains anatase type nanometer TiO2.According to the preparation method of the ozone gas sensitive coating, the flame-spray process is adopted, the solution is directly sprayed, the TiO2-WO3 nanometer composite coating of a porous micro-nanostructure is obtained, and the coating is high in sensitivity to ozone gas; compared with a plasma spraying process, the spraying process has the advantages of being simple in operation and low in cost, few procedures are needed, and large-scale industrialized production can be achieved.

Description

technical field [0001] The invention relates to the technical field of gas-sensitive coatings, in particular to an ozone gas-sensitive coating and a preparation method thereof. Background technique [0002] Ozone gas is a gas that naturally exists in our atmosphere in nature, it exists mainly due to the reaction between sunlight and certain chemicals, and is emitted directly into the atmospheric environment. Ozone is a strong oxidizing gas and it is a double-edged sword with positive and negative aspects. Among them, as a positive aspect, high-concentration ozone has high application potential in various fields, such as medicine, food, textile, chemical industry, as well as purified water and gas, air deodorization, etc. Ozone can also inactivate potential microorganisms in objects including bacteria, fungi and viruses. However, ozone is a powerful oxidizing agent, as its negative effect, inappropriate ozone concentration has a greater impact on our health. (eg irritation...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/11
Inventor 黄晶龚永锋所新坤周平刘奕李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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