CN107367492A - The method of its detection fewrricyanic acid radical ion of the preparation method and application of ionic liquid carbon point - Google Patents
The method of its detection fewrricyanic acid radical ion of the preparation method and application of ionic liquid carbon point Download PDFInfo
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- CN107367492A CN107367492A CN201710353727.1A CN201710353727A CN107367492A CN 107367492 A CN107367492 A CN 107367492A CN 201710353727 A CN201710353727 A CN 201710353727A CN 107367492 A CN107367492 A CN 107367492A
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- 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
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- 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 invention discloses a kind of preparation method and application of ionic liquid carbon point, it detects fewrricyanic acid radical ion (Fe (CN)6 3‑) method, the preparation method of ionic liquid carbon point passes through dc source, using graphite rod as electrode, the homogeneous system of ionic liquid [BMIM] BF4 and water is electrolyte solution, apply potential electrolysis graphite rod, after cell reaction terminates, product obtains ionic liquid carbon point mother liquor after separating-purifying.Its advantage is：Ionic liquid carbon point prepared by the present invention is uniformly dispersed, size uniformity, blue-fluorescence is sent under ultra violet lamp, fluorescence quantum yield is high, and can be used for Fe (CN)6 3‑Highly sensitive detection.
Description
Technical field
The invention belongs to carbon nanomaterial technical field, and in particular to a kind of preparation method of ionic liquid-carbon point and its
Using.
Background technology
The potassium ferricyanide is a kind of poisonous material, and its aqueous solution is under illumination or high temperature, or the meeting in strong acid medium
Resolve into the cyanide of severe toxicity, take in through human body or after skin absorbs body is harmful to, can also induced renal damage, when measuring more even
Can be lethal.Moreover, the potassium ferricyanide can pollute to water body, also there is very serious harm to environment.K3Fe(CN)6Be easy to by
Other reducing agents are reduced into K in light or solution4Fe(CN)6, therefore, it is possible to develop a kind of easy, efficient, sensitive method to examine
Survey Fe (CN)6 4-Or Fe (CN)6 3-There is important practical significance.
Carbon point is a kind of fluorescent nano particle that can be sent intense fluorescence, be readily synthesized.It is its excellent fluorescence, low
Toxicity, easily modified characteristic make it have potential application in fields such as electrochemical catalysis, bio-imaging, ion detections.Carbon amounts
The synthetic method of son point has a lot, can be divided mainly into two kinds：From top to bottom and from bottom to top.Top-to-bottom method is usually will
Bulk carbon material such as graphite, graphene, carbon fiber etc. peel off the little particle for being less than 10nm into size, including arc discharge, machinery
Stripping, laser ablation, hydro-thermal method, electrochemical process etc., wherein, the advantages that electrochemical method is easy, green, inexpensive is to turn into a lot
The selection of researcher.
Functionalization is carried out to carbon nanomaterial with ionic liquid, the compound of formation can combine the excellent properties of the two.
The luminescence generated by light of carbon nanomaterial is attributed to the presence of surface trap, and after being passivated by ILs, the fluorescent emission of carbon nanomaterial is more
For stabilization, fluorescent carbon applications to nanostructures ability is improved.
So far, the electrolytic graphite rod in the homogeneous phase system of ionic liquid-water, prepare luminous carbon point and carries out Fe
(CN)6 3-The research directly detected does not have document report.
The content of the invention
The invention provides a kind of preparation method and applications of ionic liquid-carbon point, are synthesized using an one-step electrochemistry method
Ionic liquid-carbon point, the fluorescence quenching using fewrricyanic acid root to ionic liquid-carbon point, is realized to Fe in the aqueous solution
(CN)6 3-Selective Sensitive Detection.
According to an aspect of the present invention, there is provided a kind of preparation method of ionic liquid-carbon point, by dc source, with
Graphite rod is electrode, and the homogeneous system of ionic liquid [BMIM] BF4 and water is electrolyte solution, applies potential electrolysis graphite rod,
After cell reaction terminates, product obtains ionic liquid-carbon point mother liquor after separating-purifying.
Its advantage is：Ionic liquid prepared by the present invention-carbon point is uniformly dispersed, size uniformity, in ultra violet lamp
Under send blue-fluorescence, fluorescence quantum yield is high, and can be used for Fe (CN)6 3-Highly sensitive detection.
In some embodiments, ionic liquid [BMIM] BF4Volume ratio with water is 3：7.Its advantage is：Ion
Liquid has high ionic conductivity, and the BF4 in graphite stripping process-Special adsorption will effectively facilitate the stripping of graphite
From.However, when ionic liquid concentration is more relatively low, system electric current very little, carbon material peeling rate is extremely slow, when ionic liquid is dense
During degree increase, system electric current will increase rapidly.However, when ionic liquid concentration is too high, system electric current crosses senior general and causes electrification
Learn work station damage.Therefore, the luminous carbon material of even structure can quickly, effectively be obtained by considering, and cannot be easily caused again
Apparatus damage, the present invention [BMIM] BF4Volume ratio with water is 1：4~1：3, preferably 3：7.
In some embodiments, it is 7~8V to apply voltage.Its advantage is：Overtension, graphite stripping is too fast,
Resulting materials are easy to stacked in multi-layers, influence the generation of carbon point, brownout, yield is excessively slow, therefore preferred voltage is 7~8V.
In some embodiments, the time of cell reaction is 2~5h.Its advantage is：Reaction time is too short, carbon point
Yield is too low, and the reaction time is long, and graphite rod expansion, come off serious, electrical efficiency step-down.Accordingly, it is preferred that cell reaction when
Between be 2~5h.
In some embodiments, product process for separation and purification is：Reaction product is in the centrifuge that rotating speed is 12000 rpm
10~20min of middle centrifugation, then the rufous supernatant of collection is filtered by vacuum by 0.22 μm of filter membrane of aperture, gained
Filtrate is ionic liquid-carbon point mother liquor.Its advantage is：Through above-mentioned separation process, just obtained clean ionic liquid-
Carbon dots solution.Experiment finds that electrolyte slowly becomes yellow by colourless, then becomes dark-brown.Graphite anode rod is also gradually swollen
It is swollen, come off, last electrolyte becomes black wash state.Ionic liquid prepared by the present invention-carbon point is through x-ray photoelectron energy spectrum diagram minute
Analysis, there is C, N, B, F characteristic peak in full spectrum, it was demonstrated that ionic liquid [BMIM] BF4Successfully it has been combined on carbon point.
According to another aspect of the present invention, additionally provide one kind and utilize ionic liquid-carbon point fluoroscopic examination fewrricyanic acid root
Ion-Method, comprise the following steps：
1) ionic liquid-carbon point mother liquor obtains ionic liquid-carbon point aqueous solution, it is glimmering to determine its after water dilutes and adjusts pH
Light intensity value,
2) a series of Fe (CN) of concentration knowns is separately added into step 1)6 3-The aqueous solution, after reacted, it is determined again
Fluorescence intensity level,
3) percentage reduced using fluorescence intensity is ordinate, and fewrricyanic acid root concentration is abscissa, drawing curve,
And then the Fe (CN) by unknown concentration 4)6 3-The aqueous solution is added in the ionic liquid-carbon point aqueous solution, is measured
Fluorescence intensity level, Fe (CN) is calculated according to working curve6 3-Content；
Wherein, the ionic liquid-carbon point mother liquor is prepared as the method described in any one of Claims 1 to 5.
In some embodiments, the pH of ionic liquid-carbon point aqueous solution is 4~7.Its advantage is：Acid condition
The fluorescence intensity of lower ionic liquid-carbon dots solution will be higher than under alkalescence condition, and reason is the carbon point because the pH of solution is higher
Interaction between ionic liquid is weaker, causes the N doping amount that can strengthen fluorescence to reduce.And in pH value it is 3-11
In the range of, add Fe (CN)6 3-The fluorescence of ionic liquid-carbon point can be caused to be quenched, but be quenched efficiency and differ
Cause.Quenching efficiency substantially under acid condition is higher than under alkalescence condition.Therefore preferably pH is 4~7, highest quenching effect
Rate reaches when pH value is 4, therefore, more preferably pH=4.
In some embodiments, the reaction time is 2~5min.Its advantage is：This is based primarily upon fast reaction and moved
Mechanics, now there is higher sensitivity.
In some embodiments, step 1), 2) and 4) in the measuring method of fluorescence intensity level be：Exciting respectively
Under conditions of wavelength 335nm, fluorescence intensity level at launch wavelength 425nm is read.
In some embodiments, the Fe in step 2) (CN)6 3-The concentration of the aqueous solution is 0.01~180 μm of ol/L.
Specifically, it is water-soluble to obtain ionic liquid-carbon point after water dilutes and adjusts pH to 4 for ionic liquid-carbon point mother liquor
Liquid, solution is placed in XRF, under the conditions of excitation wavelength 335nm, reads fluorescence intensity at launch wavelength 425nm
Value, a series of Fe (CN) of concentration known of concentration in 0.01~180 μm of ol/L is added to ionic liquid-carbon point aqueous solution6 3-Water
Solution, after reacting 2min, resulting solution is placed in XRF, under the conditions of excitation wavelength 335nm, reads launch wavelength
Fluorescence intensity level at 425 nm, percentage is reduced as ordinate using fluorescence intensity, with Fe (CN)6 3-Concentration is abscissa, draws work
Make curve, then by the Fe (CN) of unknown concentration6 3-The aqueous solution is added in the ionic liquid-carbon point aqueous solution, in excitation wave
Under the conditions of long 335nm, fluorescence intensity level at launch wavelength 425nm is read, fluorescence intensity is reduced into percentage substitutes into working curve,
Fe (CN) in institute's test sample product is calculated according to working curve6 3-Content.
Ionic liquid prepared by the present invention-carbon point excites generation blue-fluorescence under 365nm ultra violet lamps, adds Fe
(CN)6 3-Fluorescence can be quenched afterwards, other anion such as CH3COO-,H2PO4 -, SO4 2-,SCN-,ClO3 -,NO3 -,NO2 -,
Cl-,Br-,I-,S2-Its fluorescence can not be all quenched, it was demonstrated that ionic liquid-carbon point prepared by the present invention is to Fe (CN)6 3-With fine
Selective recognition ability.Fe(CN)6 4-Also there is quenching effect to the fluorescence of ionic liquid-carbon point, but Fe can be become by oxidation
(CN)6 3-, and then Fe (CN) is drawn simultaneously6 3-With Fe (CN)6 4-Concentration.
In common cation, except Fe3+、Hg2+Outside, other ions will not produce substantially the fluorescence of ionic liquid-carbon point
Significantly affect.After adding screening agent, Fe3+With Hg2+Fluorescence probe ionic liquid-carbon point is not disturbed to anion Fe (CN)6 3-
Sensitive Detection.
Ionic liquid prepared by the present invention-carbon point detects Fe (CN) under optimum condition6 3-When, with Fe (CN)6 3-Concentration
Rise, the fluorescence of ionic liquid-carbon point is gradually quenched, and detection range reaches 1.0~140.0 μM, test limit as little as 30nM.
Compared with prior art, the present invention possesses following beneficial effect：
(1) ionic liquid-carbon point for preparing of the present invention has a good fluorescence property, and structural homogeneity is good；
(2) Fe (CN) in the present invention6 3-The fluorescence signal of alternative quenching ionic liquid-carbon point, and CH3COO-,
H2PO4 -,SO4 2-,SCN-,ClO3 -,NO3 -,NO2 -,Cl-,Br-,I-,S2-The fluorescence of ionic liquid-carbon point can not be quenched Deng anion
Signal；
(3) ionic liquid-carbon point prepared by the present invention can be achieved to trace Fe (CN)6 3-Quick, Sensitive Detection.
Brief description of the drawings：
Fig. 1 is the transmission electron microscope picture of ionic liquid-carbon point；
Fig. 2 is the high-resolution-ration transmission electric-lens figure of ionic liquid-carbon point；
The XPS spectrum figure of Fig. 3 ionic liquids-carbon point：Wherein (a) figure is the full spectrum of ionic liquid-carbon point, (b), (c), (d),
(e), (f) figure is respectively C1s, N1s, O1s, B1s, F1s high-resolution power spectrum；
Fig. 4 is the fluorescence excitation and emission spectrum of ionic liquid-carbon point.
Fig. 5 is ionic liquid-emission spectrum of the carbon point under different excitation wavelengths, and illustration is that ionic liquid-carbon point is water-soluble
The picture that liquid obtains under fluorescent lamp (left side) and uviol lamp (right side) irradiation.
Fig. 6 is fluorescence response of the ionic liquid-carbon point to various anion.
Fig. 7 is ionic liquid-carbon dots solution under different pH value at Fe (CN)6 3-Add front and rear fluorescence intensity.
Fig. 8 is Fe (CN)6 3-It is quenched the kinetics of ionic liquid-carbon dots solution fluorescence.F0Represent ionic liquid-carbon
The fluorescence intensity of point, F represent to add Fe (CN)6 3-The fluorescence intensity of ionic liquid-carbon point afterwards.
Fig. 9 left figures are to add the Fe (CN) of various concentrations6 3-The fluorescence response of ionic liquid-carbon point (is distinguished from a to q afterwards
To add 0,0.01,0.05,0.1,0.5,1.0,5.0,10.0,20.0,40.0,60.0,80.0,100 .0,120.0,
140.0,160.0,180.0 μM Fe (CN)6 3-), illustration is under uviol lamp (365nm) irradiation, adds Fe (CN)6 3-It is front and rear
Fluorescence photo.Right figure is ionic liquid-carbon point to various concentrations Fe (CN)6 3-The linearity of regression curve map of fluorescence response.(Fe
(CN)6 3-Concentration is from 1.0 to 140.0 μM).
Embodiment：
With reference to specific embodiments and the drawings, the invention will be further described.
Embodiment 1
The electrochemical process synthesis of ionic liquid-carbon point：
By dc source, respectively using two graphite rods as positive and negative electrode, with ionic liquid ([BMIM] BF4) and water (V:
V=3:7) homogeneous system is electrolyte solution, applies potential electrolysis graphite rod, and the decomposition voltage of application is 8V, electrolysis time
For 3h, solution gradually becomes yellow by colourless, eventually becomes reddish brown.Then by reaction product with appropriate distilled water diluting,
Solution after dilution is centrifuged into 15min in the centrifuge that rotating speed is 12000rpm, then with the filter membrane that aperture is 0.22 μm to receiving
The rufous supernatant of collection is filtered by vacuum, and has just obtained ionic liquid-carbon point mother liquor.Gained ionic liquid-carbon point mother liquor
It is yellow solution under natural light irradiation, launches blue-fluorescence under 365nm ultraviolet lights.
The transmission electron microscope photo of gained ionic liquid-carbon point is as shown in figure 1, carbon point has the particle diameter minute of a relative narrower
Cloth, size are about 5nm.Fig. 2 is that high-resolution-ration transmission electric-lens (HRTEM) clearly show that the spacing of lattice of carbon point is 0.36nm, with stone
(002) crystal face of ink is consistent.Therefore, the carbon point of preparation has graphite-structure.
The full spectrogram of x-ray photoelectron power spectrum of gained ionic liquid-carbon point as shown in figure 3, it can be seen in figure 3 that from
Sub- liquid-carbon point is made up of five kinds of elements of C, N, O, F and B, and this result demonstrates ionic liquid ([BMIM] BF4) successfully multiple
Close on carbon point.Fig. 4 is the fluorescence excitation and emission spectrum of ionic liquid-carbon point.Fig. 5 is ionic liquid-carbon point in difference
Emission spectrum under excitation wavelength, illustration are ionic liquid-carbon point aqueous solution under fluorescent lamp (left side) and uviol lamp (right side) irradiation
Obtained picture.Illustration clearly shows that the carbon point of preparation has good water dispersible, essentially colorless in the sunlight, and
Very strong blue-fluorescence is but sent under the irradiation of uviol lamp (365nm).As can be seen from Figure 4, the maximum excitation wavelength of carbon point is
335nm, and under maximum excitation, the most hyperfluorescence peak of carbon point is in 425 nm, and therefore, 335nm swashs as the optimal of following experiment
Send out wavelength.Fig. 5 is the carbon point typically emission spectrum under different excitation wavelengths.With most of carbon point one of other document reports
Sample, the carbon point of preparation show the luminous of obvious excitation wavelength dependence.In the range of 315-385nm, with excitation wavelength
Increase, red shift occurs for the launch wavelength of carbon point, and fluorescence intensity also occurs first increasing the trend reduced afterwards, this be probably due to
Caused by synthesizing the size heterogeneity of carbon point and the distribution of different emission sites.This phenomenon shows that the carbon point of preparation has
Very strong photoluminescence performance.
Fig. 6 is fluorescence response figure of the ionic liquid-carbon point to anion.In all anion, only Fe (CN)6 3-/
Fe(CN)6 4-The fluorescence of ionic liquid-carbon point can be significantly quenched, this is probably due to ion exchange and electrostatic interaction, imidazoles
The adsorbable big anionic group Fe (CN) of cation6 3-/Fe(CN)6 4-, ionic liquid-carbon point fluorescence is caused by electric charge transfer
Quenching.But Fe (CN)6 4-Also there is quenching effect to the fluorescence of ionic liquid-carbon point, but Fe (CN) can be become by oxidation6 3-, enter
And Fe (CN) is drawn simultaneously6 3-With Fe (CN)6 4-Concentration.
Embodiment 2
Fe(CN)6 3-Fluoroscopic examination
Ionic liquid prepared by embodiment 1-carbon point mother liquor is made into the finely dispersed aqueous solution, and the pH of the aqueous solution is 4, is put
Enter in 6 centrifuge tubes.Fewrricyanic acid root water of the 100 μ L concentration in 0.1~180 μm of ol/L concentration known is separately added into thereto
Solution, after reacting 1min, the fluorescence intensity level added before and after fewrricyanic acid root is determined using XRF, is reduced with fluorescence intensity
Percentage be ordinate, fewrricyanic acid root concentration is abscissa, drawing curve.Then by 100 μ L Fe of unknown concentration
(CN)6 3-Sample solution is added in ionic liquid-carbon point aqueous solution, the degree of fluorescence intensity reduction is measured, according to working curve
The Fe (CN) in institute's test sample product is calculated6 3-Content is 113 μM.
Fig. 7 is that ionic liquid-carbon dots solution is at Fe (CN) under different pH value6 3-Add front and rear fluorescence intensity.Either
It is no that Fe (CN) is added into ionic liquid-carbon dots solution6 3-, the fluorescence intensity of ionic liquid-carbon dots solution will under acid condition
Higher than under alkalescence condition, it may be possible to which, because the pH of solution is higher, the interaction between carbon point and ionic liquid is weaker, causes
The N doping amount of fluorescence, which can be strengthened, to be reduced.And in the range of pH value is 3-11, add Fe (CN)6 3-Ion can be caused
The fluorescence of liquid-carbon point is quenched, but the efficiency being quenched is not consistent.Quenching efficiency substantially under acid condition will
Higher than under alkalescence condition, and highest quenching efficiency reaches when pH value is 4, and this shows, pH=4 is optimal detection
Condition.Therefore, cushioning liquid pH is used as fluorescence sense detection Fe (CN) for 46 3-Optimal conditions.
Fig. 8 is Fe (CN)6 3-It is quenched the kinetics of ionic liquid-carbon dots solution fluorescence.With the reaction time after
It is continuous, Fe (CN)6 3-Fluorescence be gradually quenched.When incubation time is 120s, the fluorescence intensity of mixed solution is quenched initial to it
27%, after 2min, quenching degree no longer changes substantially, therefore ionic liquid-carbon point and Fe (CN)6 3-Optimal incubation when
Between be 2min.
Fig. 9 is the Fe (CN) for adding various concentrations6 3-The fluorescence response of ionic liquid-carbon point afterwards.As Fe (CN)6 3-Concentration
Increase to 180.0 μM from 0 μM, the fluorescence intensity of compound is gradually reduced, and fluorescence is gradually quenched.As Fe (CN)6 3-Concentration reaches
At 140.0 μM, the fluorescence intensity of ionic liquid-carbon point no longer changes substantially, and therefore, 140.0 μM substantially can be completely sudden
Go out the fluorescence of carbon point, also indicates that the fluorescent quenching efficiency of carbon point to Fe (CN)6 3-Concentration it is very sensitive.It is moreover, clear in illustration
It has been shown that, adds a certain amount of Fe (CN)6 3-Afterwards, obvious quenching occurs for fluorescence.Meanwhile in 1.0~140.0 μM of concentration ranges,
Ionic liquid-carbon point fluorescent quenching ratio (F0/ F) and Fe (CN)6 3-Concentration (C/ μM) linear dependency relation, as shown at right.Line
Property regression equation is (F0-F)/F0=0.00354C+ 0.17062, linearly dependent coefficient R2For 0.997.Calculate Fe (CN)6 3-
Test limit (LOD) is 30 nM (S/N=3).Test result indicates that, the fluorescence probe based on ionic liquid-carbon point can be above
Super-sensitive identification Fe (CN) in complex system6 3-。
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.
Claims (10)
1. the preparation method of a kind of ionic liquid-carbon point, it is characterised in that pass through dc source, using graphite rod as electrode, ion
The homogeneous system of liquid [BMIM] BF4 and water is electrolyte solution, applies potential electrolysis graphite rod, after cell reaction terminates, production
Thing obtains ionic liquid-carbon point mother liquor after separating-purifying.
2. the preparation method of ionic liquid-carbon point according to claim 1, it is characterised in that the ionic liquid [BMIM]
The volume ratio of BF4 and water is 3：7.
3. the preparation method of ionic liquid-carbon point according to claim 1, it is characterised in that the application voltage is 7-8V.
4. the preparation method of ionic liquid-carbon point according to claim 1, it is characterised in that the time of the cell reaction
For 2-5h.
5. the preparation method of ionic liquid-carbon point according to claim 1, it is characterised in that the product separating-purifying side
Method is：Reaction product centrifuges 10-20min in the centrifuge that rotating speed is 12000rpm, the rufous supernatant of collection, then with
Aperture is that 0.22 μm of filter membrane is filtered by vacuum to the solution, and gained filtrate is ionic liquid-carbon point mother liquor.
A kind of 6. method using ionic liquid-carbon point fluoroscopic examination fewrricyanic acid radical ion, it is characterised in that including following step
Suddenly：
1) ionic liquid-carbon point mother liquor obtains ionic liquid-carbon point aqueous solution, it is strong to determine its fluorescence after water dilutes and adjusts pH
Angle value,
2) a series of Fe (CN) of concentration knowns is separately added into step 1)6 3-The aqueous solution, after reacted, it is glimmering that its is determined again
Light intensity value,
3) percentage reduced using fluorescence intensity is ordinate, and fewrricyanic acid root concentration is abscissa, drawing curve,
And then the Fe (CN) by unknown concentration 4)6 3-The aqueous solution is added in the ionic liquid-carbon point aqueous solution, measures fluorescence
Intensity level, Fe (CN) is calculated according to working curve6 3-Content,
Wherein, the ionic liquid-carbon point mother liquor is prepared as the method described in claim any one of 1-5.
7. utilizing the method for ionic liquid-carbon point fluoroscopic examination fewrricyanic acid radical ion according to claim 6, its feature exists
In the pH of the ionic liquid-carbon point aqueous solution is 4-7.
8. utilizing the method for ionic liquid-carbon point fluoroscopic examination fewrricyanic acid radical ion according to claim 6, its feature exists
In the reaction time is 2-5min.
9. utilizing the method for ionic liquid-carbon point fluoroscopic examination fewrricyanic acid radical ion according to claim 6, its feature exists
In, the step 1), 2) and 4) in the measuring method of fluorescence intensity level be：Respectively under conditions of excitation wavelength 335nm,
Read fluorescence intensity level at launch wavelength 425nm.
10. utilizing the method for ionic liquid-carbon point fluoroscopic examination fewrricyanic acid radical ion according to claim 6, its feature exists
In the Fe (CN) in the step 2)6 3-The concentration of the aqueous solution is 0.01-180 μm of ol/L.
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Cited By (2)
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| CN108262033A (en) * | 2018-01-16 | 2018-07-10 | 中国科学院过程工程研究所 | A kind of preparation method and application of nanometer carbon dots for catalyzing and synthesizing propylene glycol |
| CN109540822A (en) * | 2018-11-20 | 2019-03-29 | 常州工学院 | The identification of Manganese hexacyanoferrate potassium and manganese content test |
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| CN106353286A (en) * | 2016-08-04 | 2017-01-25 | 浙江理工大学 | Method for preparing ionic liquid-carbon nano-belts and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262033A (en) * | 2018-01-16 | 2018-07-10 | 中国科学院过程工程研究所 | A kind of preparation method and application of nanometer carbon dots for catalyzing and synthesizing propylene glycol |
| CN109540822A (en) * | 2018-11-20 | 2019-03-29 | 常州工学院 | The identification of Manganese hexacyanoferrate potassium and manganese content test |
| CN109540822B (en) * | 2018-11-20 | 2021-02-02 | 常州工学院 | Identification of potassium manganese ferricyanide and determination of manganese content |
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