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Test method for formaldehyde catalyzing efficiency of photocatalyst

A test method and photocatalyst technology, applied in the field of photocatalysis, can solve problems such as high requirements, unsuitable for laboratory testing, and large photocatalyst quantity requirements

Inactive Publication Date: 2018-03-27
SHANGHAI NAXU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a test method for the photocatalyst catalytic formaldehyde efficiency aiming at the shortcomings of the existing photocatalyst formaldehyde removal efficiency testing experiment requirements are high and the photocatalyst amount is relatively large, which is not suitable for laboratory testing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Precisely prepare the absorption solution, AHMT (4-amino-3-diazo-5-mercapto-1,2,4-triazolene) solution, potassium hydroxide solution and potassium periodate solution (among which the absorption solution The preparation method of AHMT solution is to weigh 1g of triethanolamine, 0.25g of sodium metabisulfite and 0.25g of disodium edetate in water and dilute to 1000ml; , and diluted to 50ml, this reagent is stored in a brown bottle; the preparation method of potassium hydroxide solution is to take 28.0g potassium hydroxide and dissolve it in 100ml water; the preparation method of potassium periodate solution is to take 1.5g periodate Potassium is dissolved in 0.2mol / L potassium hydroxide solution, and diluted to 100ml, and heated on a water bath to dissolve.) Add formaldehyde to the absorption solution, and control the concentration of formaldehyde at 1mg / L, 2mg / L, and 3mg respectively / L, 4mg / L, 5mg / L, 6mg / L, 7mg / L, 8mg / L, 9mg / L, 10mg / L, respectively take 2ml of absorptio...

Embodiment 2

[0019] Precisely prepare the absorption solution, AHMT (4-amino-3-diazo-5-mercapto-1,2,4-triazolene) solution, potassium hydroxide solution and potassium periodate solution (among which the absorption solution The preparation method of AHMT solution is to weigh 1g of triethanolamine, 0.25g of sodium metabisulfite and 0.25g of disodium edetate in water and dilute to 1000ml; , and diluted to 50ml, this reagent is stored in a brown bottle; the preparation method of potassium hydroxide solution is to take 28.0g potassium hydroxide and dissolve it in 100ml water; the preparation method of potassium periodate solution is to take 1.5g periodate Potassium is dissolved in 0.2mol / L potassium hydroxide solution, and diluted to 100ml, and heated on a water bath to dissolve.) Add formaldehyde to the absorption solution, and control the concentration of formaldehyde at 1mg / L, 2mg / L, and 3mg respectively / L, 4mg / L, 5mg / L, 6mg / L, 7mg / L, 8mg / L, 9mg / L, 10mg / L, respectively take 3ml absorption s...

Embodiment 3

[0021]Precisely prepare the absorption solution, AHMT (4-amino-3-diazo-5-mercapto-1,2,4-triazolene) solution, potassium hydroxide solution and potassium periodate solution (among which the absorption solution The preparation method of AHMT solution is to weigh 1g of triethanolamine, 0.25g of sodium metabisulfite and 0.25g of disodium edetate in water and dilute to 1000ml; , and diluted to 50ml, this reagent is stored in a brown bottle; the preparation method of potassium hydroxide solution is to take 28.0g potassium hydroxide and dissolve it in 100ml water; the preparation method of potassium periodate solution is to take 1.5g periodate Potassium is dissolved in 0.2mol / L potassium hydroxide solution, and diluted to 100ml, and heated on a water bath to dissolve.) Add formaldehyde to the absorption solution, and control the concentration of formaldehyde at 1mg / L, 2mg / L, and 3mg respectively / L, 4mg / L, 5mg / L, 6mg / L, 7mg / L, 8mg / L, 9mg / L, 10mg / L, take 5ml absorption solution contai...

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Abstract

The invention discloses a test method for formaldehyde catalyzing efficiency of a photocatalyst. The test method comprises the following steps: preparing an absorption solution, an AHMT (4-amino-3-hydrazine-5-mercapto-1,2,4-triazole) solution, a potassium hydroxide solution and a potassium periodate solution; adding formaldehyde with different content into the absorption solution, then adding thepotassium hydroxide solution, the AHMT solution and the potassium periodate solution, and measuring the relationship between the content of the formaldehyde and readings of a spectrophotometer by adopting the spectrophotometer; drawing a standard curve; preparing a formaldehyde absorption solution with a certain concentration; stirring with illumination, performing centrifuging, taking supernatant, and adding the potassium hydroxide solution, the AHMT solution and the potassium periodate solution; determining the final content of the formaldehyde by adopting a spectrophotometer method, and dividing the final content of the formaldehyde by the initial content of the formaldehyde to obtain the formaldehyde catalyzing efficiency of the photocatalyst. The formaldehyde catalyzing efficiency ofthe photocatalyst is tested by adopting the method disclosed by the invention easily and quickly; the test method does not have a requirement on equipment environment; a testing purpose can be achieved by a small amount of the photocatalyst; the test method is suitable for a laboratory to use, and has a great application prospect.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a method for testing the catalytic formaldehyde efficiency of a photocatalyst. Background technique [0002] Formaldehyde is a colorless, flammable, strong-smelling substance that is commonly used in building materials and to make many household products. Examples include stamped wood products such as particle board, plywood, and fiberboard; such as glues and adhesives; permanent press fabrics, coatings for paper; and certain insulation materials. In addition, formaldehyde is also commonly used as an industrial fungicide, bactericide, disinfectant, and as an antiseptic in morgues and medical laboratories. Formaldehyde also occurs naturally in the environment. It is produced in small amounts during the metabolic processes of most organisms. [0003] When the concentration of formaldehyde in the air exceeds 0.1ppm, some people may have adverse reactions such as tearing;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/38
Inventor 何丹农徐少洪王敬锋林琳陈超张现金彩虹
Owner SHANGHAI NAXU IND
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