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Cataluminescence sensitive material for rapidly determining formaldehyde and carbon monoxide

A carbon monoxide, rapid measurement technology, applied in the field of sensing, can solve the problem of time-consuming and difficult to realize on-site

Inactive Publication Date: 2015-08-19
BEIJING UNION UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since these methods require pre-enrichment and sample preparation to complete the determination by analytical instruments, they are time-consuming and difficult to implement on-site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add natural flake graphite into concentrated sulfuric acid at a temperature of 0°C under continuous stirring, keep the temperature and stir for 2 hours, then add sodium phosphate equal to the weight of natural flake graphite, and then add solid permanganate 2.2 times the weight of natural flake graphite Potassium, continue to maintain the temperature and stir for 3 hours, raise the temperature to 44°C and continue to stir for 1 hour, add an appropriate amount of hydrogen peroxide with a mass fraction of 5%, raise the temperature to 85°C, keep the temperature and stir for 1 hour, suction filter and wash the filtrate until neutral, Obtain graphene oxide;

[0013] Co-dissolve palladium dichloride, cerium acetate pentahydrate and nickel chloride hexahydrate in an aqueous hydrochloric acid solution with a mass fraction of 10% at a temperature of 35°C, ultrasonically vibrate until clarified, and add appropriate amount of citric acid and sodium citrate under high-speed stirring...

Embodiment 2

[0017] Add natural flake graphite into concentrated sulfuric acid at a temperature of 1°C under continuous stirring, keep the temperature and stir for 2 hours, then add sodium phosphate equal to the weight of natural flake graphite, and then add solid permanganate 2.2 times the weight of natural flake graphite Potassium, continue to maintain the temperature and stir for 3 hours, raise the temperature to 42°C and continue to stir for 2 hours, add an appropriate amount of hydrogen peroxide with a mass fraction of 6%, raise the temperature to 88°C, keep the temperature and stir for 1 hour, suction filter and wash the filtrate until neutral, Obtain graphene oxide;

[0018] Co-dissolve palladium dichloride, cerium oxalate decahydrate, cerium nitrate hexahydrate and nickel bromide trihydrate in an aqueous hydrochloric acid solution with a mass fraction of 8% at a temperature of 31°C, ultrasonically vibrate until clear, and add an appropriate amount of lemon under high-speed stirring ...

Embodiment 3

[0022] Add natural flake graphite to concentrated sulfuric acid at a temperature of 2°C under continuous stirring, keep the temperature and stir for 1.5 hours, then add sodium phosphate equal to the weight of natural flake graphite, and then add solid permanganate 2.2 times the weight of natural flake graphite Potassium, continue to maintain the temperature and stir for 2 hours, raise the temperature to 40°C and continue to stir for 1.5 hours, add an appropriate amount of hydrogen peroxide with a mass fraction of 7%, raise the temperature to 70°C, keep the temperature and stir for 1 hour, suction filter and wash the filtrate until neutral, Obtain graphene oxide;

[0023] Palladium dichloride, ammonium cerium nitrate, cerium sulfate octahydrate and nickel sulfate hexahydrate were co-dissolved in aqueous hydrochloric acid solution with a mass fraction of 6% at a temperature of 33°C, vibrated ultrasonically until clarified, and added appropriate amount of citric acid and Sodium c...

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Abstract

A cataluminescence sensitive material for rapidly determining formaldehyde and carbon monoxide is a nanometer composite powder material composed of graphene supported Pd, CeO2 and NiO. A preparation method of the material comprises the following steps: adding natural flake graphite into concentrated sulfuric acid, stirring, adding sodium phosphate and potassium permanganate, heating, adding hydrogen peroxide, heating, stirring, carrying out pumping filtration, and carrying out water washing to obtain graphene oxide; and dissolving palladium dichloride, a cerium salt and a nickel salt in an aqueous solution of hydrochloric acid, adding citric acid and sodium citrate, adding the graphene oxide, stirring, adding hydrazine hydrate, stirring, standing, ageing, filtering, drying, grinding, and roasting to obtain the nanometer composite powder material composed of graphene supported Pd, CeO2 and NiO. A formaldehyde and carbon monoxide detection gas sensor made by using the sensitive material provided by the invention can be used to rapidly and accurately determine a tiny amount of formaldehyde and carbon monoxide in air on the scene without interference by common concurrent.

Description

technical field [0001] The invention relates to a catalytic luminescence sensitive material for rapid determination of formaldehyde and carbon monoxide, especially graphene-supported CeO doped with palladium atoms 2 The composite sensitive material composed of NiO and NiO belongs to the field of sensing technology. Background technique [0002] Formaldehyde is a colorless and volatile chemical raw material. It is widely used as an adhesive raw material, disinfectant, preservative and finishing agent in products such as compressed boards, coatings, paints, cosmetics and packaging materials. are continuously released into the air. People have different reactions to various concentrations of formaldehyde in the air: when the concentration of formaldehyde in the air reaches 0.08mg / m 3 Children will have mild asthma when it reaches 0.1mg / m 3 There is a sense of peculiar smell when it reaches 0.6mg / m 3 It can cause throat discomfort or pain when it reaches 1mg / m 3 Sometimes i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76
Inventor 周考文范慧珍张洁
Owner BEIJING UNION UNIVERSITY
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