CN109490374A - The cross sensitivity material of formaldehyde in air, benzene, ammonia and carbon monoxide - Google Patents
The cross sensitivity material of formaldehyde in air, benzene, ammonia and carbon monoxide Download PDFInfo
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- CN109490374A CN109490374A CN201811448350.9A CN201811448350A CN109490374A CN 109490374 A CN109490374 A CN 109490374A CN 201811448350 A CN201811448350 A CN 201811448350A CN 109490374 A CN109490374 A CN 109490374A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/76—Chemiluminescence; Bioluminescence
- G01N21/766—Chemiluminescence; Bioluminescence of gases
Abstract
The present invention relates to the cross sensitivity materials of a kind of formaldehyde in air, benzene, ammonia and carbon monoxide, it is characterized in that by graphene-supported Cr2O3, CuO and Nd2O3The catalytic luminescence sensitive material of composition, preparation method are: converting graphene oxide for natural graphite；Chromic salts is dissolved in aqueous citric acid solution, mantoquita and neodymium salt are dissolved in aqueous hydrochloric acid solution, this two kinds of solution are mixed with continuous stirring, agar powder is added after heating, is cooled to room temperature to form gel, by the drying of this gel, grinding and calcination, obtains powder body material；With continuous stirring, graphene oxide and powder body material are added in hydrazine hydrate aqueous solution, heating, stirring, natural cooling and be filtered, washed, dry it is graphene-supported by Cr to get arriving2O3, CuO and Nd2O3The composite powder material of composition.The gas sensor made using sensitive material provided by the present invention can quickly measure trace formaldehyde, benzene, ammonia and carbon monoxide in air at the scene.
Description
Technical field
It is negative that the present invention relates to the cross sensitivity material of a kind of formaldehyde in air, benzene, ammonia and carbon monoxide, especially graphenes
Carry by Cr2O3, CuO and Nd2O3The catalytic luminescence sensitive material of composition, belongs to field of sensing technologies.
Background technique
Formaldehyde is a kind of colourless volatile industrial chemicals, as adhesive raw materials, disinfectant, preservative and finishing agent quilt
It is widely used in the products such as compression plate, coating, paint, cosmetics and packaging material, and as the use of application product is not by
It is disconnected to be discharged into air.People have different reflections to the formaldehyde of concentration various in air: when the concentration of formaldehyde in air reaches
0.08mg/m3When children will occur slightly to pant, reach 0.1mg/m3When just have peculiar smell sense, reach 0.6mg/m3When can cause
Throat discomfort or pain, reach 1mg/m3When eyes can be caused largely to shed tears, reach 10mg/m3Shi Zehui feels expiratory dyspnea, reaches
To 30mg/m3When can make one to suffocate.Long Term Contact low dosage formaldehyde (0.1mg/m3Can cause below) chronic respiratory disease,
Women pregnancy syndrome, newborn's constitution reduce and the lesions such as chromosome abnormality.Formaldehyde is by International Cancer Research Center
(IARC) it is confirmed as carcinogen.Benzene is a kind of industrial chemicals with aromatic odor, and Chronic Benzene Poisoning is mainly to skin, eye
Eyeball and the irritating effect of the upper respiratory tract；Often in contact with benzene, skin can due to degreasing desiccation furfur, some appearance anaphylaxis it is wet
Rash；Long-term sucking benzene can lead to alpastic anemia.Ammonia is a kind of alkaline, colourless, with intense irritation smell gas
Body, the ammonia in air are often attracted in human skin mucous membrane, eye conjunctiva and respiratory tract mucosa because soluble easily in water.When
Ammonia concentration is 0.5mg/m in air3When can make one to feel penetrating odor；When ammonia concentration is more than 80mg/m in air3
When, can make one in the short time to occur shedding tears, pharyngalgia, cough, uncomfortable in chest, expiratory dyspnea, and with dizzy, headache, nausea, vomit
The symptoms such as spit, be out of strength, it is serious it also occur that pulmonary edema and respiratory disease.People live in the ammonia environment of low concentration for a long time
In, respiratory tract cilium and damage mucous epithelium tissue can be gradually benumbed, sex pheromone is made to be easy to invade, weakens body to disease
Resistance.Carbon monoxide is colourless, odorless, nonirritant gas, and mixing with air explosion limit is 12.5%~74%.
Carbon monoxide be distributed in atmosphere the important pollutant that is generated in most wide and most quantity pollutant and combustion process it
One.When all carbon containing substance combustions is incomplete, CO gas all can produce.There are many kinds of the operations for contacting CO in the industrial production,
Such as the production of coking, ironmaking, forging and smelting, casting and heat treatment in metallurgical industry；Ammonia, acetone, phosgene, methanol are synthesized in chemical industry
Production；Mine blows out, Gas Explosion Accidents in Coal Mines；Carbon graphite electrode manufacture；Internal combustion engine test run；And production metal carbonylation
The processes such as object such as carbonyl nickel, carbonyl iron, or produce and use containing CO fuel gas (such as water-gas containing CO up to 40%, blast furnace and hair
Contain 30% in raw producer gas, coal gas contains 5%~15%), it may all contact CO.Gas after explosive or gunpowder explosion contains CO about
30%~60%.Using diesel oil, gasoline engine exhaust gas in also contain CO about 1%~8%.Carbon monoxide enters meeting after human body
It is combined with the hemoglobin in blood, the combination energy due to CO and Hb BC hemoglobin binding capacity much stronger than oxygen and hemoglobin
Power, and then the enabled amount of hemoglobin in conjunction with oxygen is sharply reduced, and so as to cause body tissue anoxic, human body is caused to suffocate
It is dead.
In recent years, since interior decoration and the use of all kinds of Modern Live articles make room air pollution be on the rise.
Formaldehyde, benzene, ammonia and carbon monoxide are the major pollutants of room air.In recent years, it is newly-built to have spot-check Beijing for national departments concerned
High-grade office building and home dwelling cell, its indoor air quality is detected, find formaldehyde in indoor air, benzene, ammonia
All exceeded up to 50% or more with carbon monoxide, air quality seriously threatens human health.
The method for measuring formaldehyde, benzene, ammonia and carbon monoxide respectively mainly has spectrophotometry, electrochemical process, chromatography, change
Learn luminescence method, makings Liquid Chromatography/Mass Spectrometry and chromatography of ions etc..These methods, which require preconcentration and proper treatment, to lead to
It crosses analysis instrument and is respectively completed measurement, therefore time-consuming is not easy live realization.Four kinds of molecule methods for measuring simultaneously have not been reported.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of conventional art, provide a kind of PARA FORMALDEHYDE PRILLS(91,95), benzene, ammonia and carbon monoxide have compared with
Highly selective catalytic luminescence sensitive material.The gas sensor made of this sensitive material, can measure in air simultaneously
Trace formaldehyde, benzene, ammonia and carbon monoxide without the interference by common concurrent.
Sensitive material of the present invention is graphene-supported by Cr2O3, CuO and Nd2O3The composite sensing material of composition
Material, preparation method are as follows: natural graphite being slowly added in the concentrated sulfuric acid with continuous stirring, is slowly added after stirring 3-4 hours
The potassium permanganate for entering 1.5 times of weight of natural graphite is warming up to 40-45 DEG C and continues stirring 3-5 hours, cooled to room temperature,
It filters and much filtrate is washed to neutrality, obtain A；It is in 20-30% aqueous citric acid solution, by copper that chromic salts, which is dissolved in mass fraction,
Salt and neodymium salt are dissolved in the aqueous hydrochloric acid solution that mass fraction is 15-20%, with continuous stirring, this two kinds of solution are mixed and are stirred
It mixes 2 hours, agar powder is added after being warming up to 90-95 DEG C and stirs to being completely dissolved, is cooled to room temperature to form gel, this gel is dried
After dry, it is warming up to 200-250 DEG C with the speed for being no more than 3 DEG C per minute in chamber type electric resistance furnace, keeps this temperature 4 hours, after
It is continuous to be warming up to 400-450 DEG C with the speed for being no more than 3 DEG C per minute, keep this temperature 3 hours, cooled to room temperature obtains B；
With continuous stirring, A is added in the hydrazine hydrate aqueous solution that mass fraction is 15-20%, is warming up to 45 DEG C, constant temperature stirs 4-5
Hour, then B is also added thereto, continues constant temperature and stirs 2-3 hours, is washed with deionized 3 times after natural cooling and filtering,
It is graphene-supported by Cr to get arriving to be subsequently placed in drying in 65 DEG C of vacuum drying oven2O3, CuO and Nd2O3The composite powder of composition
Body material.
Wherein, chromic salts is anhydride or the hydration of chromium chloride, perchloric acid chromium, chromic acetate, chromium+oxalic acid, chromic nitrate and chromium sulfate
One or more of mixtures of object, mantoquita be copper chloride, copper sulphate, cupric phosphate and copper nitrate anhydride or hydrate one
Kind or several mixtures, neodymium salt be neodymium nitrate, neodymium oxalate, Dineodymium trisulfate, neodymium chloride, acetic acid neodymium and neodymium perchlorate anhydride or
One or more of mixtures of hydrate.
When composite sensitive material each component mass fraction obtained meets Cr2O3(15-20%), CuO (10-16%),
Nd2O3It is sensitive for the catalytic luminescence as formaldehyde in air, benzene, ammonia and carbon monoxide when (12-20%) and C (50-60%)
Material has very high sensitivity and selectivity.
Specific embodiment
Embodiment 1
Natural graphite is slowly added in the concentrated sulfuric acid with continuous stirring, stirring was slowly added to natural graphite 1.5 after 3 hours
The potassium permanganate of times weight is warming up to 42 DEG C and continues stirring 5 hours, and cooled to room temperature filters and simultaneously washes much filtrate
To neutrality, A is obtained；It is in 30% aqueous citric acid solution, by 2 water copper chlorides, 6 water nitric acid that 6 water chromium chlorides, which are dissolved in mass fraction,
Neodymium and neodymium perchlorate are dissolved in the aqueous hydrochloric acid solution that mass fraction is 15%, and with continuous stirring, this two kinds of solution are mixed simultaneously
Stirring 2 hours is added agar powder and stirs to being completely dissolved, is cooled to room temperature to form gel, this gel is dried after being warming up to 95 DEG C
After dry, be warming up to 205 DEG C in chamber type electric resistance furnace with the speed for being no more than 3 DEG C per minute, keep this temperature 4 hours, continue with
The speed no more than 3 DEG C is warming up to 450 DEG C per minute, keeps this temperature 3 hours, cooled to room temperature obtains B；Continuously stirring
It mixes down, A is added in the hydrazine hydrate aqueous solution that mass fraction is 15%, be warming up to 45 DEG C, constant temperature stirs 4.5 hours, then by B
Also it is added thereto, continues constant temperature and stir 2.3 hours, be washed with deionized 3 times after natural cooling and filtering, be subsequently placed in 65 DEG C
Vacuum drying oven in drying to get to graphene-supported by Cr2O3, CuO and Nd2O3The composite powder material of composition.
Analysis: carrying out constituent analysis to composite sensitive material, and measuring mass percent is 16.2%Cr2O3, 12.5%CuO,
17.8%Nd2O3And 53.5%C.
Using: with this sensitive material detection formaldehyde, benzene, ammonia and carbon monoxide, the range of linearity is formaldehyde 0.1-66mg/m3、
Benzene 0.6-68mg/m3, ammonia 0.7-80mg/m3With carbon monoxide 1-100mg/m3, detect and be limited to formaldehyde 0.05mg/m3, benzene 0.2mg/
m3, ammonia 0.3mg/m3With carbon monoxide 0.8mg/m3, common concurrent do not interfere with.
Embodiment 2
Natural graphite is slowly added in the concentrated sulfuric acid with continuous stirring, stirring was slowly added to natural graphite 1.5 after 4 hours
The potassium permanganate of times weight is warming up to 45 DEG C and continues stirring 3 hours, and cooled to room temperature filters and simultaneously washes much filtrate
To neutrality, A is obtained；It is in 20% aqueous citric acid solution, by 5 brochanites and 6 water chlorine that 6 water perchloric acid chromium, which are dissolved in mass fraction,
Change neodymium to be dissolved in the aqueous hydrochloric acid solution that mass fraction is 18%, with continuous stirring, it is small that this two kinds of solution is mixed and stirred for 2
When, agar powder is added after being warming up to 94 DEG C and stirs to being completely dissolved, is cooled to room temperature to form gel, after the drying of this gel,
220 DEG C are warming up to be no more than 3 DEG C of speed per minute in chamber type electric resistance furnace, keeps this temperature 4 hours, is continued with per minute not
Speed more than 3 DEG C is warming up to 430 DEG C, keeps this temperature 3 hours, and cooled to room temperature obtains B；With continuous stirring, by A
It is added in the hydrazine hydrate aqueous solution that mass fraction is 16%, is warming up to 45 DEG C, constant temperature stirs 4.5 hours, it is also then added in B
In, continue constant temperature and stir 3 hours, is washed with deionized 3 times after natural cooling and filtering, is subsequently placed in 65 DEG C of vacuum drying oven
Middle drying is graphene-supported by Cr to get arriving2O3, CuO and Nd2O3The composite powder material of composition.
Analysis: carrying out constituent analysis to composite sensitive material, and measuring mass percent is 19.5%Cr2O3, 15.3%CuO,
12.4%Nd2O3And 52.8%C.
Using: with this sensitive material detection formaldehyde, benzene, ammonia and carbon monoxide, the range of linearity is formaldehyde 0.08-60mg/m3、
Benzene 0.8-70mg/m3, ammonia 1-80mg/m3With carbon monoxide 1-100mg/m3, detect and be limited to formaldehyde 0.05mg/m3, benzene 0.4mg/m3、
Ammonia 0.5mg/m3With carbon monoxide 0.8mg/m3, common concurrent do not interfere with.
Embodiment 3
Natural graphite is slowly added in the concentrated sulfuric acid with continuous stirring, stirring was slowly added to natural graphite after 3.5 hours
The potassium permanganate of 1.5 times of weight is warming up to 40 DEG C and continues stirring 5 hours, and cooled to room temperature filters and by much filtrate water
It is washed till neutrality, obtains A；6 water acetic acid chromium and chromium sulfate, which are dissolved in mass fraction, is in 28% aqueous citric acid solution, by cupric phosphate and
8 water Dineodymium trisulfates are dissolved in the aqueous hydrochloric acid solution that mass fraction is 16%, and with continuous stirring, this two kinds of solution are mixed and stirred for
2 hours, agar powder is added after being warming up to 93 DEG C and stirs to being completely dissolved, is cooled to room temperature to form gel, after the drying of this gel,
230 DEG C are warming up to the speed for being no more than 3 DEG C per minute in chamber type electric resistance furnace, keeps this temperature 4 hours, is continued with per minute
Speed no more than 3 DEG C is warming up to 420 DEG C, keeps this temperature 3 hours, and cooled to room temperature obtains B；With continuous stirring,
A is added in the hydrazine hydrate aqueous solution that mass fraction is 18%, is warming up to 45 DEG C, constant temperature stirs 4 hours, and then B is also added
Wherein, continue constant temperature to stir 2.5 hours, be washed with deionized 3 times after natural cooling and filtering, be subsequently placed in 65 DEG C of vacuum
It is dried in baking oven graphene-supported by Cr to get arriving2O3, CuO and Nd2O3The composite powder material of composition.
Analysis: carrying out constituent analysis to composite sensitive material, and measuring mass percent is 18.1%Cr2O3, 14.7%CuO,
15.0%Nd2O3And 52.2%C.
Using: with this sensitive material detection formaldehyde, benzene, ammonia and carbon monoxide, the range of linearity is formaldehyde 0.1-69mg/m3、
Benzene 0.7-75mg/m3, benzene 0.8-80mg/m3With carbon monoxide 2-100mg/m3, detect and be limited to formaldehyde 0.05mg/m3, benzene 0.3mg/
m3, ammonia 0.4mg/m3With carbon monoxide 1mg/m3, common concurrent do not interfere with.
Embodiment 4
Natural graphite is slowly added in the concentrated sulfuric acid with continuous stirring, stirring was slowly added to natural graphite 1.5 after 3 hours
The potassium permanganate of times weight is warming up to 44 DEG C and continues stirring 3.5 hours, cooled to room temperature, filters and by much filtrate water
It is washed till neutrality, obtains A；By chromium+oxalic acid and chromium sulfate be dissolved in mass fraction be 22% aqueous citric acid solution in, by 5 brochanites,
Cupric phosphate, 10 water neodymium oxalates and neodymium perchlorate are dissolved in the aqueous hydrochloric acid solution that mass fraction is 20%, with continuous stirring, by this
Two kinds of solution are mixed and stirred for 2 hours, after being warming up to 94 DEG C be added agar powder stir to being completely dissolved, be cooled to room temperature to be formed it is solidifying
Glue is warming up to 240 DEG C in chamber type electric resistance furnace with the speed for being no more than 3 DEG C per minute, keeps this temperature after the drying of this gel
4 hours, continues to be warming up to 410 DEG C with the speed for being no more than 3 DEG C per minute, keep this temperature 3 hours, cooled to room temperature obtains
To B；With continuous stirring, A is added in the hydrazine hydrate aqueous solution that mass fraction is 20%, is warming up to 45 DEG C, constant temperature stirring 5 is small
When, then B is also added thereto, continues constant temperature and stirs 2 hours, natural cooling is simultaneously washed with deionized 3 times after filtering, then
It is graphene-supported by Cr to get arriving to be placed in drying in 65 DEG C of vacuum drying oven2O3, CuO and Nd2O3The composite granule material of composition
Material.
Analysis: carrying out constituent analysis to composite sensitive material, and measuring mass percent is 15.8%Cr2O3, 11.6%CuO,
14.3%Nd2O3And 58.3%C.
Using: with this sensitive material detection formaldehyde, benzene, ammonia and carbon monoxide, the range of linearity is formaldehyde 0.1-70mg/m3、
Benzene 0.8-80mg/m3, ammonia 0.8-80mg/m3With carbon monoxide 1-100mg/m3, detect and be limited to formaldehyde 0.05mg/m3, benzene 0.5mg/
m3, ammonia 0.5mg/m3With carbon monoxide 0.8mg/m3, common concurrent do not interfere with.
Embodiment 5
Natural graphite is slowly added in the concentrated sulfuric acid with continuous stirring, stirring was slowly added to natural graphite 1.5 after 4 hours
The potassium permanganate of times weight is warming up to 42 DEG C and continues stirring 4 hours, and cooled to room temperature filters and simultaneously washes much filtrate
To neutrality, A is obtained；It is in 25% aqueous citric acid solution, by 3 water copper nitrates and 4 water acetic acids that 9 water chromic nitrates, which are dissolved in mass fraction,
Neodymium is dissolved in the aqueous hydrochloric acid solution that mass fraction is 15%, and with continuous stirring, this two kinds of solution are mixed and stirred for 2 hours,
Agar powder is added after being warming up to 95 DEG C to stir to being completely dissolved, is cooled to room temperature to form gel, after the drying of this gel, box
250 DEG C are warming up to the speed for being no more than 3 DEG C per minute in resistance furnace, keeps this temperature 4 hours, is continued to be no more than per minute
3 DEG C of speed is warming up to 400 DEG C, keeps this temperature 3 hours, and cooled to room temperature obtains B；With continuous stirring, A is added
In the hydrazine hydrate aqueous solution that mass fraction is 19%, 45 DEG C are warming up to, constant temperature stirs 4 hours, then B is also added thereto, after
Continuous constant temperature stirs 3 hours, is washed with deionized 3 times after natural cooling and filtering, is subsequently placed in 65 DEG C of vacuum drying oven and dries
It is dry graphene-supported by Cr to get arriving2O3, CuO and Nd2O3The composite powder material of composition.
Analysis: carrying out constituent analysis to composite sensitive material, and measuring mass percent is 17.7%Cr2O3, 13.3%CuO,
18.6%Nd2O3And 50.4%C.
Using: with this sensitive material detection formaldehyde, benzene, ammonia and carbon monoxide, the range of linearity is formaldehyde 0.09-50mg/m3、
Benzene 0.6-60mg/m3, ammonia 0.7-80mg/m3With carbon monoxide 1-100mg/m3, detect and be limited to formaldehyde 0.05mg/m3, benzene 0.2mg/
m3, ammonia 0.3mg/m3With carbon monoxide 0.8mg/m3, common concurrent do not interfere with.
Claims (2)
1. the cross sensitivity material of formaldehyde in air, benzene, ammonia and carbon monoxide, it is characterized in that graphene-supported by Cr2O3、CuO
And Nd2O3The catalytic luminescence sensitive material of composition, wherein the mass percent range of each component is 15-20%Cr2O3, 10-16%
CuO, 12-20%Nd2O3And 50-60%C, preparation method are: natural graphite being slowly added to the concentrated sulfuric acid with continuous stirring
In, stirring is slowly added to the potassium permanganate of 1.5 times of weight of natural graphite after 3-4 hours, be warming up to 40-45 DEG C and continue to stir 3-
5 hours, cooled to room temperature filtered and much filtrate is washed to neutrality, obtains A；It is 20- that chromic salts, which is dissolved in mass fraction,
In 30% aqueous citric acid solution, mantoquita and neodymium salt is dissolved in the aqueous hydrochloric acid solution that mass fraction is 15-20%, is being continuously stirred
Under, this two kinds of solution are mixed and stirred for 2 hours, agar powder is added after being warming up to 90-95 DEG C and stirs to being completely dissolved, is cooled to
Gel formed at room temperature is warming up to 200- in chamber type electric resistance furnace after the drying of this gel with the speed for being no more than 3 DEG C per minute
It 250 DEG C, keeps this temperature 4 hours, continues to be warming up to 400-450 DEG C with the speed for being no more than 3 DEG C per minute, keep this temperature 3
Hour, cooled to room temperature obtains B；With continuous stirring, the hydrazine hydrate aqueous solution that mass fraction is 15-20% is added in A
In, 45 DEG C are warming up to, constant temperature stirs 4-5 hours, is then also added thereto B, and continue constant temperature and stirs 2-3 hours, natural cooling
And filter after be washed with deionized 3 times, be subsequently placed in 65 DEG C of vacuum drying oven dry to get to it is graphene-supported by
Cr2O3, CuO and Nd2O3The composite powder material of composition.
2. the cross sensitivity material of formaldehyde in air according to claim 1, benzene, ammonia and carbon monoxide, it is characterized in that institute
The chromic salts stated is the anhydride of chromium chloride, perchloric acid chromium, chromic acetate, chromium+oxalic acid, chromic nitrate and chromium sulfate or one kind of hydrate
Or several mixtures, mantoquita are the anhydride of copper chloride, copper sulphate, cupric phosphate and copper nitrate or the one or more of hydrate
Mixture, neodymium salt is the anhydride or hydrate of neodymium nitrate, neodymium oxalate, Dineodymium trisulfate, neodymium chloride, acetic acid neodymium and neodymium perchlorate
One or more of mixtures.
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Cited By (5)
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| CN110095559A (en) * | 2019-04-03 | 2019-08-06 | 北京联合大学 | The catalytic luminescence sensitive material of low temperature formaldehyde, benzene and ammonia |
| CN110095560A (en) * | 2019-04-18 | 2019-08-06 | 北京联合大学 | A kind of low temperature high selection carbon monoxide sensitive material |
| CN110455978A (en) * | 2019-06-30 | 2019-11-15 | 北京联合大学 | A kind of low-temperature catalyzed luminous cross sensitivity material of benzene and ammonia |
| CN110658186A (en) * | 2019-10-22 | 2020-01-07 | 北京联合大学 | Sensitive material for simultaneously measuring formaldehyde, benzene and carbon monoxide |
| CN111638207A (en) * | 2020-05-13 | 2020-09-08 | 北京联合大学 | Sensitive material for low-temperature formaldehyde, ammonia and carbon monoxide |
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| CN110095559A (en) * | 2019-04-03 | 2019-08-06 | 北京联合大学 | The catalytic luminescence sensitive material of low temperature formaldehyde, benzene and ammonia |
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| CN110455978A (en) * | 2019-06-30 | 2019-11-15 | 北京联合大学 | A kind of low-temperature catalyzed luminous cross sensitivity material of benzene and ammonia |
| CN110455978B (en) * | 2019-06-30 | 2021-09-14 | 北京联合大学 | Benzene and ammonia low-temperature catalytic luminescence cross-sensitive material |
| CN110658186A (en) * | 2019-10-22 | 2020-01-07 | 北京联合大学 | Sensitive material for simultaneously measuring formaldehyde, benzene and carbon monoxide |
| CN110658186B (en) * | 2019-10-22 | 2021-08-13 | 北京联合大学 | Sensitive material for simultaneously measuring formaldehyde, benzene and carbon monoxide |
| CN111638207A (en) * | 2020-05-13 | 2020-09-08 | 北京联合大学 | Sensitive material for low-temperature formaldehyde, ammonia and carbon monoxide |
| CN111638207B (en) * | 2020-05-13 | 2023-04-21 | 北京联合大学 | Sensitive material for low temperature formaldehyde, ammonia and carbon monoxide |
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