Testing method for performance of photocatalytic air-purifying material

A technology for air purification materials and testing methods, which is applied in material separation, analysis materials, measurement devices, etc., can solve the problems of difficulty in rapid and accurate evaluation of the performance of photocatalytic air purification materials, and achieves the promotion of practical application process, short test period, and test results. Accurate and reliable results

Inactive Publication Date: 2016-09-07
山东亿康环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the performance of the above-mentioned photocatalytic air purification material is difficult to be quickly and accurately evaluated, and propose a test method that is fast and efficient, with accurate and reliable test results and high test stability

Method used

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  • Testing method for performance of photocatalytic air-purifying material
  • Testing method for performance of photocatalytic air-purifying material
  • Testing method for performance of photocatalytic air-purifying material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] N-TiO 2 Performance characterization of powder photocatalytic degradation of benzene.

[0038] N-TiO was sprayed with a high-pressure spray gun 2 The dispersion was sprayed on the surface of a 5cm×5cm ground glass sample, weighed after drying with a hair dryer, and the fixed sample load was 30mg. Put the prepared sample into the middle of the bottom of the reaction chamber 5, tighten and close the reaction chamber cover, open the oxygen cylinder valve in the gas source 1 and the two-way ball valves at the front and rear of the reaction chamber, replace the air in the reaction chamber with oxygen, and then close the front and rear valves , turn on the 185nm ultraviolet lamp in the light source system 4 to irradiate the test sample for 6 hours for pretreatment, then use the vacuum pump to evacuate the reaction chamber 5 to -0.10MPa, turn on the gas source 1 and fill the benzene gas with a concentration of 50ppm to 0MPa, and control the target in the reaction chamber The...

Embodiment 2

[0040] N-TiO 2 Performance characterization of spray photocatalytic degradation of toluene, combined with examples figure 1 shown.

[0041] N-TiO was sprayed with a high-pressure spray gun 2 The spray was sprayed on the surface of 5cm×5cm ceramic sheet, dried with a hair dryer, weighed, and the fixed sample load was 10mg. Put the prepared sample into the middle of the bottom of the reaction chamber 4, tighten and close the reaction chamber cover, open the valve of the oxygen cylinder in the gas source 1 and the two-way ball valves at the front and rear of the reaction chamber, replace the air in the reaction chamber with oxygen, and then close the front and rear valves , turn on the 254nm ultraviolet lamp in the light source system to irradiate the test sample for 12 hours for pretreatment, then use a vacuum pump to evacuate the reaction chamber to -0.10MPa, turn on the gas source 1 and fill it with toluene gas with a concentration of 30ppm to -0.05MPa, and then fill it with...

Embodiment 3

[0043] N-TiO 2 Performance characterization of spray photocatalytic degradation of acetaldehyde, combined with examples figure 1 shown.

[0044] The N-TiO 2 The spray was loaded on the surface of 5cm×5cm aluminum-plastic panel, dried with a hair dryer and weighed, and the fixed sample load was 20mg. Put the prepared sample into the middle of the bottom of the reaction chamber 4, tighten and close the reaction chamber cover, open the valve of the oxygen cylinder in the gas source 1 and the two-way ball valves at the front and rear of the reaction chamber, replace the air in the reaction chamber with oxygen, and then close the front and rear valves , turn on the 365nm ultraviolet lamp in the light source system to irradiate the test sample for 24 hours for pretreatment, then use a vacuum pump to evacuate the reaction chamber to -0.10MPa, turn on the gas source 1 and fill the acetaldehyde gas with a concentration of 1ppm to -0.09MPa, and fill it with high-purity Nitrogen to 0M...

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Abstract

The invention discloses a testing method for the performance of a photocatalytic air-purifying material. The testing method comprises the following steps: preparing a sample piece of the photocatalytic air-purifying material and placing the prepared sample piece in an enclosed reaction chamber; irradiating the sample piece with a light source so as to realize pretreatment of the sample piece; introducing a target pollutant with a fixed concentration into the reaction chamber by using a partial pressure method and carrying out dark adsorption on the sample piece; and carrying out a photocatalytic degradation reaction and detecting concentration changes of the target pollutant, a degradation intermediate and a final degradation product, i.e., carbon dioxide, by using a gas chromatographic-mass spectrometric instrument. The testing method is rapid and highly efficient, has accurate and reliable testing results and high testing stability, can simultaneously characterize the adsorption performance and photocatalysis performance of the photocatalytic air-purifying material and the photocatalysis performance of material from the two aspects consisting of the concentration change of the target pollutant and the concentration change of the degradation intermediate, and is beneficial for objective and accurate characterization of the performance of the photocatalytic air-purifying material; thus, the method can promote extensive application of the photocatalytic air-purifying material.

Description

technical field [0001] The invention belongs to the technical field of testing material properties, in particular to a testing method for the performance of photocatalytic air purification materials in degrading gas phase pollutants. Background technique [0002] Photocatalytic materials, especially semiconductor photocatalytic materials such as titanium dioxide, can convert light energy into chemical energy, and have great application prospects in the fields of air purification, sewage treatment, antibacterial deodorization, anti-fog and self-cleaning. With the gradual marketization of photocatalytic technology and the emergence of photocatalytic air purification materials and products, the contradiction of lack of relevant reaction test methods gradually emerged. The relevant regulatory departments and industries cannot accurately analyze and judge the performance of such materials. It is difficult to accurately evaluate the pros and cons of materials. According to the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/025
Inventor 王法国刘文秀曹文斌孙芃张俊
Owner 山东亿康环保科技有限公司
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