CN109142297A - A kind of moisture measurement test strips and preparation method thereof - Google Patents
A kind of moisture measurement test strips and preparation method thereof Download PDFInfo
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- CN109142297A CN109142297A CN201810978506.8A CN201810978506A CN109142297A CN 109142297 A CN109142297 A CN 109142297A CN 201810978506 A CN201810978506 A CN 201810978506A CN 109142297 A CN109142297 A CN 109142297A
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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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
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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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6432—Quenching
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Abstract
The present invention provides a kind of moisture measurement test strips and preparation method thereof, and the moisture measurement test strips include the test paper for being impregnated with perovskite quantum dot, and the perovskite quantum dot is PbCsBr3、PbCsCl3And PbCsF3One of or it is a variety of.The invention also discloses the preparation methods of moisture measurement test strips, comprising the following steps: under atmosphere of inert gases, test paper is immersed in 1-10s in the solution containing perovskite quantum dot, is sealed after air-drying.Moisture measurement test strips of the present invention are put into use, the material removal that will be used to seal and need to detect position.Moisture measurement test paper formula of the present invention is scientific, reasonable, easy to operate, preparation cost is cheap, can be used for the high precision measurement of moisture.
Description
Technical field
The present invention relates to moisture measurement technologies more particularly to a kind of moisture measurement test strips and preparation method thereof.
Background technique
As the gradually development of science and technology needs operating environment, reaches anhydrous when carrying out certain experiments or operation
The state of anaerobic.This just needs to carry out water oxygen test to environment.Currently, the sensing tested for low content or micro water oxygen
Device precision requirement is high, and preparation cost is expensive, and then leads to the raising of testing cost.The investment of water sample test sensor can increase
The cost of experiment or production can not industrialize wide hair and use.On the other hand, water-oxygen sensor sensitivity at present is low, test accuracy
It not can guarantee.
So, it would be highly desirable to a kind of simple, easy to operate, inexpensive moisture measurement method or approach.
Summary of the invention
It is an object of the present invention to high for current moisture measurement equipment cost, the low problem of sensitivity proposes a kind of water
Divide test paper item, test strips formula is scientific, reasonable, easy to operate, low in cost, can be used for the high precision measurement of moisture.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of moisture measurement test strips, including be impregnated with calcium
The test paper of titanium ore quantum dot.
Further, the perovskite quantum dot is PbCsBr3、PbCsCl3And PbCsF3One of or it is a variety of.
Further, the test paper is paper slip or nonwoven strip.
Further, the impregnation increment of the perovskite quantum dot is 5mg/cm2~50mg/cm2, preferably 10/cm2~30mg/
cm2。
Another object of the present invention also discloses a kind of preparation method of moisture measurement test strips, comprising the following steps:
Test paper is immersed in the solution containing perovskite quantum dot, is sealed after dry, moisture measurement test strips is prepared.
Further, the preparation method of the moisture measurement test strips, comprising the following steps: under atmosphere of inert gases,
Test paper is immersed in 1-10s, preferably 2-5s in the solution containing perovskite quantum dot, is sealed after air-drying, the sealing can adopt
It is encapsulated with plastic foil.
Further, the preparation step of the perovskite quantum dot solution is as follows: by the source Pb, the source Cs, the source X are dissolved in coordination
(ligand solvent is to give quantum dot ligand, allows to dissolve in certain solvents, noncoordinating molten in solvent and non-coordinating solvent
Agent plays dissolution, diluted effect), it is passed through Ar, obtains PbCsBr at room temperature3Perovskite quantum dot solution, the source Pb, Cs
Cationic in source, the source X: anion 0.01:1~1:1, pb, Cs are cation, and X is anion, and the X is halogen.The Pb:
Cs is 0.01:1~1:1.The solution containing perovskite quantum dot is used further to impregnate after centrifugation purification and toluene dispersion.
Further, the X is one of F, Cl, Br.
Further, the coordinating solvent be the full fatty acid of amount of carbon atom >=5, carbon atoms quantity >=5 not
One of saturated fatty acid, the saturated amine of amount of carbon atom >=6 and unsaturated amine of amount of carbon atom >=6 are more
Kind.
Further, the non-coordinating solvent is the alkanes of carbon atom >=10, the olefines of carbon atom >=10, carbon original
One or more of ethers and the aromatic compound of carbon atom >=10 of son >=10
Perovskite quantum dot of the present invention hydrolyzes principle:
After perovskite quantum dot hydrolyzes, quantum dot will be quenched, that is, lose fluorescent effect.
A kind of moisture measurement test strips formula of the present invention is scientific, reasonable, and preparation method is simple, easy, with the prior art
It compares and has the advantage that
1) moisture measurement test strips of the present invention are to be impregnated with the test strips of quantum dot, and real-time monitoring effect is obvious.Quantum dot
It is a kind of important low dimensional semiconductor material, the size in three of them dimension is all not more than the exciton of its corresponding semiconductor material
Twice of Bohr radius.The features such as quantum dot has excitation purity height, and quantum effect is good, and stability is good, has very in display field
Good application prospect.In quantum dot preparation process, for II-VI or iii-v quantum dot, perovskite quantum dot is more
Add and fears water oxygen.Perovskite quantum dot is caused to have very big drawback in Quantum Dot Labeling application aspect.The present invention is exactly
Perovskite quantum dot is utilized and meets water hydrolysis, the principle for causing fluorescent effect to change judges its change of moisture content, Jin Erzeng
Its application in water oxygen test is added.
2) moisture measurement test strips of the present invention are to be impregnated with the test strips of perovskite quantum dot, and cost of material is low, prepare work
Skill is simple, economical, is suitble to industrialized production.
3) moisture measurement test strips of the present invention are easy to use, and the material for being used to seal is removed (such as plastic foil is torn), is put
Enter and needs to detect position.
Specific embodiment
The present invention is further described with reference to embodiments:
Embodiment 1
Present embodiment discloses a kind of preparation methods of moisture measurement test strips to contain the following steps are included: test paper is immersed in
In the solution for having perovskite quantum dot, is sealed after dry, moisture measurement test strips are prepared.
Prepare perovskite quantum dot PbCsBr3Reaction principle:
PbBr2(lead bromide)+CsBr (cesium bromide)+DMF (N, N dimethyl amide)+OA (oleic acid)+OM (oleyl amine) →+first
Benzene → PbCsBr3(perovskite quantum dot)
Specifically, the present embodiment moisture measurement test strips preparation method the following steps are included:
The DMF of 15ml is added in 50ml centrifuge tube, then is separately added into 70mg PbBr2And 40mgCsBr, 1200r magnetic force
Stirring.It is to be dissolved to finish, 3ml OA is added, 3ml OLAM continues to stir.
It takes 10ml reaction solution to be added drop-wise in 50ml ice toluene after stirring 2min, stirs 30s, 5000r/min is centrifuged 4min, goes
Except supernatant, 30ml ice toluene ultrasound 3min is added, the same terms centrifugation removes supernatant, is prepared containing perovskite amount
The solution of son point, is put into cryo-conservation (- 18 DEG C) for the solution containing perovskite quantum dot.
It operates and is operated under atmosphere of inert gases below.
Solution containing perovskite quantum dot is dissolved in toluene, test strips are placed in above-mentioned solution after impregnating 3s,
Moisture measurement test strips are prepared with plastic foil encapsulation in natural air drying.
Moisture measurement test strips in use, only plastic foil need to be torn, be put into need to detect position can (reaction time with
Water content is related, and water content is high, and it is fast that quantum dot quenches the time).In the case where water content is the atmosphere of 30~50ppm, quantum after 20min
Point fluorescence efficiency (QY) decline 10%
Under the atmosphere of 51~100ppm of water content, quantum dot fluorescence efficiency (QY) decline 25% after 20min.
Under air atmosphere, quantum dot quenches (the QY < 5%) time as 23min.
Embodiment 2
Present embodiment discloses a kind of preparation methods of moisture measurement test strips to contain the following steps are included: test paper is immersed in
In the solution for having perovskite quantum dot, is sealed after dry, moisture measurement test strips are prepared.
Prepare perovskite quantum dot CH3NH3PbICl2Reaction principle:
PbCl270 DEG C of stirring+toluene of (lead chloride)+MAI (methylpyridinium iodide amine)+DMF (N, N dimethyl amide) →
CH3NH3PbICl2(perovskite quantum dot)
Specifically, the present embodiment moisture measurement test strips preparation method the following steps are included:
The DMF of 15ml is added in 50ml centrifuge tube, then is separately added into 3mmol PbCl2And 3mmolMAI, 1200r magnetic force
Stirring, 70 DEG C of reaction temperature.It is to be dissolved to finish, it takes 10ml reaction solution to be added drop-wise in 50ml ice toluene after stirring 2min, stirs
30s, 5000r/min are centrifuged 4min, remove supernatant, and 30ml ice toluene ultrasound 3min is added, and the same terms centrifugation removes supernatant
The solution containing perovskite quantum dot is prepared in liquid, and the solution containing perovskite quantum dot is put into cryo-conservation (- 18
℃)。
It operates and is operated under atmosphere of inert gases below.
Solution containing perovskite quantum dot is dissolved in toluene, test strips are placed in above-mentioned solution after impregnating 3s,
Moisture measurement test strips are prepared with plastic foil encapsulation in natural air drying.
Moisture measurement test strips in use, only plastic foil need to be torn, be put into need to detect position can (reaction time with
Water content is related, and water content is high, and it is fast that quantum dot quenches the time).In the case where water content is the atmosphere of 30~50ppm, quantum after 20min
Point fluorescence efficiency (QY) decline 9%
Under the atmosphere of 51~100ppm of water content, quantum dot fluorescence efficiency (QY) decline 18% after 20min.
Under air atmosphere, quantum dot quenches (the QY < 5%) time as 40min.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of moisture measurement test strips, which is characterized in that the test paper including being impregnated with perovskite quantum dot.
2. moisture measurement test strips according to claim 1, which is characterized in that the perovskite quantum dot is PbCsBr3、
PbCsCl3And PbCsF3One of or it is a variety of.
3. moisture measurement test strips according to claim 1, which is characterized in that the test paper is paper slip or nonwoven strip.
4. moisture measurement test strips according to claim 1 or claim 2, which is characterized in that the impregnation increment of the perovskite quantum dot
For 5mg/cm2~50mg/cm2。
5. a kind of preparation method of moisture measurement test strips described in claim 1-4 any one, which is characterized in that including following
Step: test paper is immersed in the solution containing perovskite quantum dot, seals after dry, moisture measurement test strips are prepared.
6. the preparation method of moisture measurement test strips according to claim 5, which comprises the following steps: lazy
Property atmosphere under, test paper is immersed in 1-10s in the solution containing perovskite quantum dot, air-dry after seal, water is prepared
Divide test paper item.
7. according to the preparation method of the moisture measurement test strips of claim 5 or 6, which is characterized in that the perovskite quantum
The preparation step of point solution is as follows: by the source Pb, the source Cs, the source X are dissolved in ligand solvent and non-coordinating solvent, are passed through Ar, room temperature
Under obtain PbCsBr3Perovskite quantum dot solution, the source Pb, cation in the source Cs, the source X: anion=0.01:1~1:1,
The X is halogen.
8. the preparation method of moisture measurement test strips according to claim 7, which is characterized in that the X is in F, Cl, Br
It is a kind of.
9. the preparation method of moisture measurement test strips according to claim 7, which is characterized in that the coordinating solvent is carbon
The full fatty acid of atomic quantity >=5, the unsaturated fatty acid of carbon atoms quantity >=5, amount of carbon atom >=6 saturated amine and
One or more of unsaturated amine of amount of carbon atom >=6.
10. the preparation method of moisture measurement test strips according to claim 7, which is characterized in that the non-coordinating solvent
For the alkanes of carbon atom >=10, the olefines of carbon atom >=10, the ethers of carbon atom >=10 and the aromatic series of carbon atom >=10
One or more of compound.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810978506.8A CN109142297A (en) | 2018-08-27 | 2018-08-27 | A kind of moisture measurement test strips and preparation method thereof |
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| CN201810978506.8A CN109142297A (en) | 2018-08-27 | 2018-08-27 | A kind of moisture measurement test strips and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884016A (en) * | 2019-03-15 | 2019-06-14 | 浙江工业大学 | Test strip containing upconversion fluorescence nano material for detecting Water in Organic Solvents content and preparation method thereof and detection method |
| CN111413310A (en) * | 2020-04-24 | 2020-07-14 | 苏州星烁纳米科技有限公司 | Moisture detection test paper, preparation method thereof and water content detection method |
| CN111929287A (en) * | 2020-04-24 | 2020-11-13 | 苏州星烁纳米科技有限公司 | Detection reagent and content determination method |
| CN112986199A (en) * | 2021-02-22 | 2021-06-18 | 江南大学 | Fluorescence detection method for acid value in oil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884016A (en) * | 2019-03-15 | 2019-06-14 | 浙江工业大学 | Test strip containing upconversion fluorescence nano material for detecting Water in Organic Solvents content and preparation method thereof and detection method |
| CN111413310A (en) * | 2020-04-24 | 2020-07-14 | 苏州星烁纳米科技有限公司 | Moisture detection test paper, preparation method thereof and water content detection method |
| CN111929287A (en) * | 2020-04-24 | 2020-11-13 | 苏州星烁纳米科技有限公司 | Detection reagent and content determination method |
| CN112986199A (en) * | 2021-02-22 | 2021-06-18 | 江南大学 | Fluorescence detection method for acid value in oil |
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