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Nano sensitive material for monitoring hydrogen cyanide

A sensitive material, hydrogen cyanide technology, applied in the field of sensing, can solve the problem of inability to quickly measure on-site, and achieve the effect of small particle size distribution, slow precipitation process, and uniform particle growth

Inactive Publication Date: 2012-12-05
BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods are accurate, they all need to be completed with large analytical instruments in the laboratory, and cannot be quickly determined on site.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Co-dissolve nickel chloride, ammonium metavanadate and aluminum nitrate in dilute hydrochloric acid aqueous solution, add an appropriate amount of citric acid under high-speed stirring to keep the solution clear for more than 8 hours, adjust the pH value of the solution to 4.0 with dilute ammonia water, continue Stir for 5 hours, let it stand for aging, rotate the solution at 86°C to obtain a gel, dry the gel by infrared for 1 hour, grind it thoroughly, and raise the temperature in a high-temperature box-type resistance furnace at a speed not exceeding 4°C per minute to 551°C, keep this temperature for 3 hours to get NiO, V 2 o 5 and Al 2 o 3 Nano powder.

[0017] Analysis: The powder material was tested with a transmission electron microscope, and its particle size range was 27-33nm; its component analysis showed that its mass fraction was 26.1% NiO, 39.5% V 2 o 5 and 34.4% Al 2 o 3 .

[0018] Application: This powder is used as a catalytic luminescence sensiti...

Embodiment 2

[0020] Co-dissolve nickel bromide, ammonium metavanadate and aluminum sulfate in an aqueous solution of dilute hydrochloric acid, add an appropriate amount of citric acid under high-speed stirring to keep the solution clear for more than 8 hours, adjust the pH value of the solution to 3.8 with dilute ammonia water, and continue Stir for 6 hours, let it stand for aging, rotate the solution at 89°C to obtain a gel, dry the gel by infrared for 1 hour, grind it thoroughly, and raise the temperature in a high-temperature box-type resistance furnace at a speed not exceeding 4°C per minute 578°C, keep this temperature for 3 hours, get NiO, V 2 o 5 and Al 2 o 3 Nano powder.

[0021] Analysis: The powder material was tested with a transmission electron microscope, and its particle size range was 30-39nm; its component analysis showed that its mass fraction was 34.7% NiO, 30.5% V 2 o 5 and 34.8% Al 2 o 3 .

[0022] Application: This powder is used as a catalytic luminescence sen...

Embodiment 3

[0024] Co-dissolve nickel sulfate, ammonium metavanadate and aluminum acetate in dilute hydrochloric acid aqueous solution, add an appropriate amount of citric acid under high-speed stirring to keep the solution clear for more than 8 hours, adjust the pH value of the solution to 3.6 with dilute ammonia water, and continue stirring After standing for 7 hours, the solution was evaporated at 87°C to obtain a gel, and the gel was dried by infrared for 1 hour. After being fully ground, the temperature was raised to 560°C at a rate of no more than 4°C per minute in a high-temperature box-type resistance furnace. ℃, keep this temperature for 3 hours to get NiO, V 2 o 5 and Al 2 o 3 Nano powder.

[0025] Analysis: The powder material was tested with a transmission electron microscope, and its particle size range was 25-31nm; its component analysis showed that its mass fraction was 31.3% NiO, 32.8% V 2 o 5 and 35.9% Al 2 o 3 .

[0026] Application: This powder is used as a cata...

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Abstract

The invention relates to a nano sensitive material for monitoring hydrogen cyanide. The nano sensitive material is characterized by consisting of the following components in percentage by weight: 25 to 35 percent of NiO, 30 to 40 percent of V2O5 and 32 to 42 percent of Al2O3 nano powder. The particle size of the nano sensitive material is between 25 and 40nm. A hydrogen cyanide air sensor made of the nano sensitive material has the advantages of wide linear range, high selectivity and high sensitivity, and can monitor a trace amount of hydrogen cyanide on line without being influenced by coexisting substances.

Description

technical field [0001] The invention relates to a nano-sensitive material for monitoring hydrogen cyanide, especially made of NiO, V 2 o 5 and Al 2 o 3 A sensitive material composed of nanometer powder belongs to the field of sensor technology. Background technique [0002] Hydrogen cyanide, also known as chevron, has a boiling point of 26°C, is colorless and smells like almonds. Hydrogen cyanide is a linear molecule with a triple bond between carbon and nitrogen. It is highly toxic and deadly. It was used as a murder gas in the gas chambers of Nazi Germany in World War II. [0003] Short-term inhalation of high-concentration hydrogen cyanide gas can cause immediate respiratory arrest and death. Low concentrations of hydrogen cyanide can cause symptoms such as mucous membrane irritation, rapid and deep breathing, fatigue and headache; slightly higher concentrations can cause symptoms such as dyspnea, increased blood pressure, and bright red skin and mucous membranes; hi...

Claims

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Application Information

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IPC IPC(8): C09K11/69B01J23/847G01N21/76
Inventor 周考文李旭菲杨燕英
Owner BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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