CN109297948A - A kind of method that the carbon quantum dot that tealeaf residue extracts prepares TNP Test paper - Google Patents
A kind of method that the carbon quantum dot that tealeaf residue extracts prepares TNP Test paper Download PDFInfo
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- CN109297948A CN109297948A CN201811537483.3A CN201811537483A CN109297948A CN 109297948 A CN109297948 A CN 109297948A CN 201811537483 A CN201811537483 A CN 201811537483A CN 109297948 A CN109297948 A CN 109297948A
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- G—PHYSICS
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- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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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
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- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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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 the methods that the carbon quantum dot that a kind of tealeaf residue extracts prepares TNP Test paper, using tealeaf residue as raw material, after spontaneous fermentation, it is impregnated with lye and aqueous solvent, filtering, dialysis purification obtain a large amount of carbon quantum dots, by carbon quantum drop on filter paper, after natural drying, TNP Test paper is obtained.The test paper can quickly detect TNP according to its change in fluorescence.The method for preparing the test paper had not only been able to achieve the recycling of tealeaf residue, but also had the advantages that quick, simple, low cost detection TNP.
Description
Technical field
The invention belongs to material preparation and pollutant analysis fields, and in particular to a kind of carbon quantum dot system that tealeaf residue extracts
The method of standby TNP Test paper.
Background technique
Carbon quantum dot is a kind of novel carbon-based zero dimension material.Carbon quantum dot has outstanding optical property, good water
Dissolubility, many advantages, such as hypotoxicity, environmental-friendly, raw material sources are wide, at low cost, good biocompatibility, therefore it is widely used,
Before the application that the multiple fields such as medical imaging technology, environmental monitoring, chemical analysis, catalyst preparation, energy development have had
Scape.Since carbon quantum dot by since finding for the first time, it has been developed that many synthetic methods, including arc discharge method, laser pin
Erosion method, electrochemical synthesis, chemical oxidization method, combustion method, hydrothermal synthesis method, microwave process for synthesizing, template etc..However these sides
Method all comes with some shortcomings, it may for example comprise arc discharge method, laser corrode method, electrochemical synthesis, chemical oxidization method, hydro-thermal
Synthetic method, microwave process for synthesizing, template etc. require to consume a large amount of raw material, and the requirement for equipment is relatively high.In recent years
Come, domestic stranger is intended to prepare carbon quantum dot using coal, biomass etc. as raw material, such as Indian is fired by raw material of bagasse
Preparation carbon quantum dot is handled with solvent after burning, this is to sacrifice the energy as cost, and burning is also with the pollution of environment.Benefit of the invention
With tealeaf residue spontaneous fermentation preparation there is the carbon quantum dot method of fluorescent characteristic to be not only able to achieve waste utilization, but also prepared by energy reduction
Energy consumption and pollution in journey not only have economic benefit, but also there are also good social effects.
2,4,6- trinitrophenols (2,4,6-Trinitrophenol), i.e. TNP are a kind of noxious materials, are mainly used in
Manufacture explosive, feux rouges sulphur black, acid dyes, leather agent, photographic chemical and pesticide etc., it can by the mouth of people, nose,
The approach such as skin contact enter in human body, cause slow poisoning, can cause when serious peripheral neuritis, irritation sign of bladder and
The damage of liver, kidney.Since TNP seriously threatens human health, so becoming of crucial importance to the detection of TNP.Detect TNP's at present
Method is mainly gas chromatography and colorimetric method, but gas chromatography is to instrument requirements height；Disclosed in patent CN107312020A
A kind of colorimetric and the double response type TNP detection probes of fluorescence, are related to organic matter reaction, prepare relatively cumbersome.It would therefore be highly desirable to grind
The test paper for making a kind of quick, simple, cheap detection TNP of energy, realizes the transportability of TNP detection.The present invention absorbs energy using TNP
The wave band of amount is close with the wave band of carbon quantum dot emitted energy, so as to which the mechanism of carbon quantum dot fluorescence is quenched, has developed one kind
Production method is easy, low in cost, easy to carry, detects quick TNP quick detection test paper.
Summary of the invention
It is an object of the invention to be directed to the deficiency of currently available technology, a kind of carbon quantum dot system that tealeaf residue extracts is provided
The method of standby TNP Test paper, the preparation method of the Test paper is environmentally protective, step is simple, low in cost and effect is obvious.
Carbon quantum dot obtained shows good photoluminescent property, and made TNP Test paper can quickly detect micro in water
TNP.
To achieve the above object, the invention adopts the following technical scheme:
A kind of carbon quantum dot that tealeaf residue extracts prepares the preparation method of TNP Test paper: using tealeaf residue as raw material, opaque
It in container after spontaneous fermentation, is impregnated with aqueous slkali and water-soluble solvent, collects filtrate after filtering by vacuum filtration bottle, dialysis mentions
It is pure to obtain carbon quantum dot；Carbon quantum dot is added dropwise on filter paper, after natural drying, obtains TNP Test paper.
The tealeaf residue includes one or more of white tea, black tea, dark green tea, green tea and yellow tea.
The opaque container includes one of ceramic pot, tin can and aluminium pot.
The aqueous slkali be pH value be 9-14 sodium hydroxide solution, ammonia spirit, one of potassium hydroxide solution or
Several, the water-soluble solvent is one of methanol, ethyl alcohol, and the mass ratio of aqueous slkali and water-soluble solvent is 1-3:1, leaching
Steeping the time is 1 ~ 30 minute.
Dialysis purification bag filter used is 1000 ~ 3500 molecular weight, and dialysis time is 1 ~ 24 hour.
Carbon quantum dot of the dropwise addition on filter paper, concentration are 0.05-0.2 grams per liter, and volume is 10-30 microlitres.
The spontaneous fermentation are as follows: will finish the tealeaf residue discarded after tea and be directly placed into closed opaque container includes ceramics
Place fermentation 1-6 weeks in tank, tin can and aluminium pot naturally at normal temperature.
Remarkable advantage of the invention is:
1 raw material is easy to get, waste utilization.Tealeaf residue is often disposed in daily life, so, the amount of collecting is big, and can be with
Realize the recycling of waste；
2 carbon quantum dot preparation processes are simple.Do not need reaction unit, should not external energy, do not need additionization in fermentation process
Raw material is learned, is only to do some simple process after fermenting, and the fluorescence property of carbon quantum dot is good；
3 test paper operate rapid and convenient.Only needing to prepare pen-type testing device for paper money, carbon quantum dot and filter paper can be realized the quick detection of TNP, and
And effect is fairly obvious.
Detailed description of the invention
The variation of the filter paper under ultraviolet light irradiation after quick detection test paper is added dropwise in the various water pollutants of Fig. 1；A): empty
It is white；B): TNP；C): positive divalent zinc ion；D): positive divalent cobalt ion；E): positive bivalent nickel ion；F): negative one valence hypochlorite from
Son；G): negative trivalent phosphoric acid hydrogen radical ion；H): 2,4- dinitrophenol；I): 2,5- dinitrophenol.
Specific embodiment
In order to make content of the present invention easily facilitate understanding, With reference to embodiment to of the present invention
Technical solution is described further, but the present invention is not limited only to this.
Embodiment 1
Using dark green tea leaf slag as raw material, the tealeaf residue discarded after tea will be finished it will be directly placed into closed opaque ceramic pot and put naturally
It sets after fermenting 3 weeks, the ammonia spirit and alcohol solution dipping for being 11 with pH, the mass ratio of ammonia spirit and ethanol solution is 2:1,
Soaking time is 1 minute, and filtrate is collected after filtering by vacuum filtration bottle, and bag filter is 1000 molecular weight, dialysis time
Carbon quantum dot is obtained for the purification of dialysis in 24 hours；It is 0.05 grams per liter by concentration, the carbon quantum dot dropwise addition that volume is 10 microlitres is being filtered
On paper, after natural drying, TNP quick detection test paper is obtained.
Embodiment 2
Using black tea leaf slag as raw material, the tealeaf residue discarded after tea will be finished it will be directly placed into closed opaque tin can and place naturally
After fermenting 1 week, impregnated with the pH sodium hydroxide solution for being 9 and methanol solution, the mass ratio of sodium hydroxide solution and methanol solution
For 3:1, soaking time is 15 minutes, and filtrate is collected after filtering by vacuum filtration bottle, and bag filter is 2000 molecular weight, thoroughly
The analysis time is that the purification of dialysis in 12 hours obtains carbon quantum dot；It is 0.1 grams per liter, the carbon quantum drop that volume is 20 microlitres by concentration
It is added on filter paper, after natural drying, obtains TNP quick detection test paper.
Embodiment 3
Using white tea leaf slag as raw material, the tealeaf residue discarded after tea will be finished it will be directly placed into closed opaque aluminium pot and place naturally
After fermenting 6 weeks, impregnated with the pH potassium hydroxide solution for being 14 and methanol solution, the mass ratio of potassium hydroxide solution and methanol solution
For 1:1, soaking time is 30 minutes, and filtrate is collected after filtering by vacuum filtration bottle, and bag filter is 3500 molecular weight, thoroughly
The analysis time is that the purification of dialysis in 1 hour obtains carbon quantum dot；It is 0.2 grams per liter by concentration, volume is that 30 microlitres of carbon quantum drop exists
On filter paper, after natural drying, TNP quick detection test paper is obtained.
Obtained carbon quantum dot sends out blue-fluorescence, and basic physical properties data are shown in Table 1.
1 carbon quantum basic physical properties data of table
Quantum point mass/dry tea leaf slag quality * 100% after average yield=drying
Embodiment 4
By common contaminant TNP in the water of 20uL 0.2ppm, positive divalent zinc ion, positive divalent cobalt ion, positive bivalent nickel ion,
Negative one valence hypochlorite ion, negative trivalent phosphoric acid hydrogen radical ion, 2,4- dinitrophenol and 2,5- dinitrophenol drop are above-mentioned
It is observed in the TNP quick detection test paper that embodiment 1 makes and under uv analyzer (launch wavelength is 365 nanometers), while with
Blank group, i.e., the carbon quantum dot quick detection test paper that any water pollutant is not added dropwise are compareed, the result is shown in Figure 1.Fig. 1 result
Show that fluorescence disappears (Fig. 1 b) in quick detection test paper that only TNP is instilled), and instill other pollutants and blank group still has
There is fluorescence；Illustrate that the fluorescence of carbon quantum dot can be quenched in TNP, the test paper is sensitive to micro TNP；Pen-type testing device for paper money irradiation under it has also been found that
Same phenomenon.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (8)
1. the method that the carbon quantum dot that a kind of tealeaf residue extracts prepare TNP Test paper, it is characterised in that: with tealeaf residue be former
Material in opaque container after spontaneous fermentation, is impregnated, filtering and collecting filter liquid with aqueous slkali and water-soluble solvent, dialysis purification
Obtain carbon quantum dot；By carbon quantum drop on filter paper, after natural drying, TNP quick detection test paper is obtained.
2. the method that the carbon quantum dot that a kind of tealeaf residue extracts according to claim 1 prepares TNP Test paper, feature exist
In: the tealeaf residue includes one or more of white tea, black tea, dark green tea, green tea and yellow tea.
3. the method that the carbon quantum dot that a kind of tealeaf residue extracts according to claim 1 prepares TNP Test paper, feature exist
In: the opaque container includes one of ceramic pot, tin can and aluminium pot.
4. the method that the carbon quantum dot that a kind of tealeaf residue extracts according to claim 1 prepares TNP Test paper, feature exist
In: the aqueous slkali be pH value be 9-14 sodium hydroxide solution, ammonia spirit, one or more of potassium hydroxide solution,
The water-soluble solvent is one of methanol, ethyl alcohol, and the mass ratio of aqueous slkali and water-soluble solvent is 1-3:1, when immersion
Between be 1 ~ 30 minute.
5. the method that the carbon quantum dot that a kind of tealeaf residue extracts according to claim 1 prepares TNP Test paper, feature exist
In: dialysis purification bag filter used is 1000 ~ 3500 molecular weight, and dialysis time is 1 ~ 24 hour.
6. the method that the carbon quantum dot that a kind of tealeaf residue extracts according to claim 1 prepares TNP Test paper, feature exist
In: carbon quantum dot of the drop on filter paper, concentration are 0.05-0.2 grams per liter, and volume is 10-30 microlitres.
7. the method that the carbon quantum dot that a kind of tealeaf residue extracts according to claim 1 prepares TNP Test paper, feature exist
In: the spontaneous fermentation time is 1-6 weeks.
8. as claim 1 ~ 7 any method prepares resulting TNP Test paper.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107641632A (en) * | 2017-10-18 | 2018-01-30 | 福州大学 | A kind of method with the carbon-based point of Microbe synthesis |
| CN109777405A (en) * | 2019-02-03 | 2019-05-21 | 山西大同大学 | A kind of red blue pair emits fluorescent carbon points and for detecting Al simultaneously3+And Cu2+The fluorescence analysis method of ion |
| CN111892036A (en) * | 2020-07-10 | 2020-11-06 | 山西大学 | Method for preparing carbon quantum dots by using waste green tea residues and application thereof |
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| CN107641632A (en) * | 2017-10-18 | 2018-01-30 | 福州大学 | A kind of method with the carbon-based point of Microbe synthesis |
| CN108611090A (en) * | 2018-05-04 | 2018-10-02 | 山西大学 | A kind of fluorescent carbon quantum dot and its preparation method and application |
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Patent Citations (5)
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|---|---|---|---|---|
| CN105067580A (en) * | 2015-07-28 | 2015-11-18 | 重庆大学 | Test paper for detecting fluazinam and detection method thereof |
| CN106190118A (en) * | 2016-07-20 | 2016-12-07 | 四川文理学院 | Radix Scrophulariae method preparing fluorescent carbon quantum dot and products thereof and application |
| CN107118768A (en) * | 2017-06-11 | 2017-09-01 | 哈尔滨师范大学 | A kind of fluorescent carbon quantum dot and application |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107641632A (en) * | 2017-10-18 | 2018-01-30 | 福州大学 | A kind of method with the carbon-based point of Microbe synthesis |
| CN109777405A (en) * | 2019-02-03 | 2019-05-21 | 山西大同大学 | A kind of red blue pair emits fluorescent carbon points and for detecting Al simultaneously3+And Cu2+The fluorescence analysis method of ion |
| CN109777405B (en) * | 2019-02-03 | 2022-02-08 | 山西大同大学 | Red-blue dual-emission fluorescent carbon dot and method for simultaneously detecting Al3+And Cu2+Method for fluorescence analysis of ions |
| CN111892036A (en) * | 2020-07-10 | 2020-11-06 | 山西大学 | Method for preparing carbon quantum dots by using waste green tea residues and application thereof |
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Application publication date: 20190201 |