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Cross sensitive material of carbon monoxide and sulfur dioxide

A sulfur dioxide, cross-sensitive technology, applied in the field of sensing, which can solve problems such as false alarms

Inactive Publication Date: 2019-07-23
BEIJING UNION UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Invention patent ZL201210014164.0 discloses a nano-sensitive material for monitoring carbon monoxide. This material also has a certain response signal to formaldehyde, methanol, sulfur dioxide and hydrogen sulfide; invention patent ZL201010575025.6 discloses a nano-sensitive material for monitoring sulfur dioxide. This sensitive material also has response signals to hydrogen sulfide, carbon monoxide and formaldehyde; it can be seen that their selectivity is still insufficient, and the carbon monoxide sensor and sulfur dioxide sensor made of the disclosed sensitive material will have false alarms when used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Dissolve neodymium nitrate hexahydrate in 10% malic acid aqueous solution to form solution A, dissolve indium chloride and indium phosphate in 20% isocitric acid aqueous solution to form solution B; oxidize octahydrate chlorine Dissolve zirconium in acetic acid aqueous solution with a mass fraction of 10%, raise the temperature to 95°C, and keep stirring continuously at the temperature, slowly add solutions A and B to the solution successively, keep stirring for 2 hours at the temperature, add agar powder and continue Stir until the solution is clear, cool to room temperature to form a gel, leave the gel overnight, dry and ash, then heat up to 300°C in a box-type resistance furnace at a speed of no more than 3°C per minute, and maintain this temperature For 3 hours, continue to heat up to 400°C at a rate of no more than 3°C per minute, keep this temperature for 3 hours, and naturally cool to room temperature to obtain the Nd 2 o 3 、In 2 o 3 and ZrO 2 Composed of com...

Embodiment 2

[0014] Dissolve neodymium oxalate decahydrate in malic acid aqueous solution with a mass fraction of 11% to form solution A, and dissolve indium nitrate trihydrate in 19% isocitric acid aqueous solution to form solution B; zirconium acetate and zirconium oxynitrate Dissolve in acetic acid aqueous solution with a mass fraction of 11%, raise the temperature to 95°C, and keep stirring continuously at the temperature, slowly add solutions A and B to this solution successively, keep stirring for 2 hours at the temperature, add agar powder and continue stirring When the solution is clear, cool down to room temperature to form a gel, leave the gel overnight, dry and ash, then heat up to 290°C in a box-type resistance furnace at a speed of no more than 3°C per minute, and keep this temperature for 4 Hours, continue to heat up to 410°C at a rate of no more than 3°C per minute, keep this temperature for 2 hours, and naturally cool to room temperature to obtain Nd 2 o 3 、In 2 o 3 and ...

Embodiment 3

[0018] Dissolve neodymium sulfate octahydrate and neodymium perchlorate in 12% malic acid aqueous solution to form solution A, and dissolve indium sulfate pentahydrate in 18% isocitric acid aqueous solution to form solution B; Zirconium sulfate water is dissolved in acetic acid aqueous solution with a mass fraction of 12%, and the temperature is raised to 95°C. While maintaining the temperature and stirring continuously, slowly add solutions A and B to the solution successively, keep the temperature and continue stirring for 2 hours, and then add agar powder And continue to stir until the solution is clear, cool to room temperature to form a gel, leave the gel overnight, dry and ash, then heat up to 280°C at a speed of no more than 3°C per minute in a box-type resistance furnace, keep At this temperature for 3 hours, continue to heat up to 420°C at a rate of no more than 3°C per minute, keep this temperature for 3 hours, and naturally cool to room temperature to obtain the Nd ...

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PUM

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Abstract

The invention relates to a cross sensitive material of carbon monoxide and sulfur dioxide, which is characterized in that the material is the composite powder material composed of Nd2O3, In2O3 and ZrO2. The preparation method comprises the steps of sequentially adding malic acid aqueous solution of neodymium salt and isocitric acid aqueous solution of indium salt into acetic acid aqueous solutionof zircon salt, heating and stirring, adding agar powder and stirring until being clear, cooling to form gel, then drying, ashing, calcinating at two sections and naturally cooling to acquire the composite powder material composed of Nd2O3, In2O3 and ZrO2. By using the gas sensor made from the sensitive material provided by the invention, the trace carbon monoxide and sulfur dioxide in the air canbe sensitively measured on the spot without being interfered by other common coexisting molecules.

Description

technical field [0001] The present invention relates to a cross-sensitive material of carbon monoxide and sulfur dioxide, especially gold atom doped by Nd 2 o 3 、In 2 o 3 and ZrO 2 A composite powder material composed of the invention belongs to the field of sensing technology. Background technique [0002] Carbon monoxide is a colorless, odorless, non-irritating gas with an explosion limit of 12.5% ​​to 74% when mixed with air. Carbon monoxide is the most widely distributed and most abundant pollutant in the atmosphere, and it is also one of the important pollutants generated in the combustion process. The main source of CO in the atmosphere is the exhaust of internal combustion engines, followed by the combustion of fossil fuels in boilers. CO gas can be produced when any carbon-containing substance is incompletely burned. There are many kinds of operations that are exposed to CO in industrial production, such as the production of coking, ironmaking, forging, castin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/10G01N21/76
CPCG01N21/766G01N31/10
Inventor 周考文杨馥秀杨宏伟张佳音
Owner BEIJING UNION UNIVERSITY
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