CN110104629A - The method for synthesizing fluorescent carbon point as raw material one step hydro thermal method using wild gleditsia sinensis - Google Patents
The method for synthesizing fluorescent carbon point as raw material one step hydro thermal method using wild gleditsia sinensis Download PDFInfo
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- CN110104629A CN110104629A CN201910420035.3A CN201910420035A CN110104629A CN 110104629 A CN110104629 A CN 110104629A CN 201910420035 A CN201910420035 A CN 201910420035A CN 110104629 A CN110104629 A CN 110104629A
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Abstract
The invention discloses a kind of methods for synthesizing fluorescent carbon point as raw material one step hydro thermal method using wild gleditsia sinensis, it disperses the carbon source open country gleditsia sinensis cleaned after drying in deionized water, it is uniformly mixed to be placed in autoclave and obtains brown color liquid in 180-220 DEG C of hydro-thermal reaction 25-29h, then obtain fluorescent carbon point with the membrane filtration that aperture is 0.22 μm after obtained brown yellow solution is cooled to room temperature.Method synthetic route provided by the invention is simple to operation, and wild gleditsia sinensis is that natural material is cheap and easy to get, is not required to repeatedly handle, and the fluorescent carbon point quantum yield of synthesis is high, and bio-toxicity bottom, is suitable for multiple fields.
Description
Technical field
The invention belongs to the synthesis technical fields of functional fluorescence carbon dots, and in particular to one kind is using wild gleditsia sinensis as one step of raw material
The method of hydro-thermal method synthesis fluorescent carbon point.
Background technique
2004, Xu et al. reported using arc discharge the method for preparing single-walled carbon nanotube, and in electrophoresis
The carbon material that can release bright fluorescence is had found during purified product for the first time, and is named as carbon dots, thus carbon dots
Enter the visual field of people.With for carbon quantum dot more in-depth study, people are in its synthesis, performance and application aspect
Research all make great progress.Meanwhile the raw material sources of carbon quantum dot are extensive, preparation cost is also relatively low, in material
Preparation field has very big advantage, in medical imaging devices, small light emitting diode, chemical sensor, light-catalyzed reaction etc.
Very wide field in have preferable application prospect.
There are many kinds of the methods for synthesizing fluorescent carbon point, since carbon quantum dot by since finding for the first time, it has been developed that being permitted
More synthetic methods, such as arc discharge method, laser ablation, electrochemical oxidation process, ultrasonic method, microwave method and hydro-thermal method, wherein
Hydro-thermal method is because its is easy to operate, mild condition is controllably considered as preparing the best approach of high fluorescent carbon point.But it is now very much
Method for synthesizing fluorescent carbon point has also suffered from many restrictions, and it is therefore necessary to develop a kind of green color ﹑ high quantum production of honest and clean valence ﹑
The material of rate is the method that carbon source synthesizes high quantum production rate carbon dots.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of synthesis technology, simple and raw material is cheap and easy to get with wild gleditsia sinensis
The method for synthesizing fluorescent carbon point for raw material one step hydro thermal method.
The present invention adopts the following technical scheme that solve above-mentioned technical problem, synthesizes by raw material one step hydro thermal method of wild gleditsia sinensis
The method of fluorescent carbon point, it is characterised in that specific steps are as follows: it disperses the carbon source open country gleditsia sinensis cleaned after drying in deionized water,
It is uniformly mixed to be placed in autoclave and obtains brown color liquid in 180-220 DEG C of hydro-thermal reaction 25-29h, then incite somebody to action
To brown yellow solution be cooled to room temperature after with aperture be that 0.22 μm of membrane filtration obtains fluorescent carbon point.
The method of the present invention that fluorescent carbon point is synthesized as raw material one step hydro thermal method using wild gleditsia sinensis, it is characterised in that specific
Step are as follows: disperse the 0.5g carbon source open country gleditsia sinensis cleaned after drying in 10mL deionized water, be uniformly mixed and be placed on height
Brown color liquid is obtained in 200 DEG C of hydro-thermal reaction 27h in pressure reaction kettle, then is used after obtained brown yellow solution is cooled to room temperature
Aperture is that 0.22 μm of membrane filtration obtains fluorescent carbon point, and the fluorescence intensity of the fluorescent carbon point is 971.
Method synthetic route provided by the invention is simple to operation, and wild gleditsia sinensis is that natural material is cheap and easy to get, is not required to repeatedly
The fluorescent carbon point quantum yield of processing, synthesis is high, and bio-toxicity bottom, is suitable for multiple fields.
Specific embodiment
Above content of the invention is described in further details by the following examples, but this should not be interpreted as to this
The range for inventing above-mentioned theme is only limitted to embodiment below, and all technologies realized based on above content of the present invention belong to this hair
Bright range.
Embodiment 1
Wild gleditsia sinensis 0.5g and deionized water 10mL after taking clean dry are uniformly mixed and are placed in 50mL autoclave,
In 180 DEG C respectively hydro-thermal reaction 25h, 26h, 27h ﹑ 28h, 29h obtain brown yellow solution, then it is obtained brown yellow solution is cooling
The membrane filtration for being 0.22 μm by aperture after to room temperature takes resulting filtrate 0.1mL fixed in 10mL volumetric flask with pipette
Hold.The fluorescence for measuring acquired solution respectively using sepectrophotofluorometer (LS55 type Fluorescence Spectrometer, Japanese light splitting company) is strong
Degree, the results are shown in Table 1.
The influence that 1 the hydro-thermal reaction time of table synthesizes fluorescent carbon point
| Reaction time (h) | 25 | 26 | 27 | 28 | 29 |
| Fluorescence intensity | 805 | 860 | 971 | 872 | 829 |
As shown in Table 1, the fluorescence intensity of fluorescent carbon point is most strong when the reaction time is 27h, and the reaction time is too short, and reaction is incomplete,
Reaction time is too long, fluorescence intensity decline.
Embodiment 2
Wild gleditsia sinensis 0.5g and deionized water 10mL after taking clean dry are uniformly mixed and are placed in 50mL autoclave,
Brown yellow solution is obtained respectively at 180 DEG C, 190 DEG C, 200 DEG C, 210 DEG C and 220 DEG C hydro-thermal reaction 27h, then pale brown by what is obtained
Color solution passes through the membrane filtration that aperture is 0.22 μm after being cooled to room temperature, take resulting filtrate 0.1mL in 10mL with pipette
Constant volume in volumetric flask.It is molten to measure gained respectively using sepectrophotofluorometer (LS55 type Fluorescence Spectrometer, Japanese light splitting company)
The fluorescence intensity of liquid, the results are shown in Table 2.
The influence that 2 hydrothermal temperature of table synthesizes fluorescent carbon point
| Reaction temperature (DEG C) | 180 | 190 | 200 | 210 | 220 |
| Fluorescence intensity | 860 | 904 | 971 | 899 | 870 |
As shown in Table 2, with the raising of reaction temperature, the fluorescence intensity of fluorescent carbon point is increased with it, when reaction temperature is 200 DEG C
When, the fluorescence intensity of fluorescent carbon point is maximum, so optimal reaction temperature is 200 DEG C.
Embodiment above describes basic principles and main features of the invention and advantage, the technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, under the range for not departing from the principle of the invention, various changes and improvements may be made to the invention, these changes and improvements are each fallen within
In the scope of protection of the invention.
Claims (2)
1. the method for synthesizing fluorescent carbon point as raw material one step hydro thermal method using wild gleditsia sinensis, it is characterised in that specific steps are as follows: will clean
Carbon source open country gleditsia sinensis after drying is scattered in deionized water, is uniformly mixed and is placed in autoclave in 180-220 DEG C
Hydro-thermal reaction 25-29h obtains brown color liquid, then it is 0.22 μm that aperture is used after obtained brown yellow solution is cooled to room temperature
Membrane filtration obtains fluorescent carbon point.
2. the method according to claim 1 for synthesizing fluorescent carbon point as raw material one step hydro thermal method using wild gleditsia sinensis, feature exist
In specific steps are as follows: disperse the 0.5g carbon source open country gleditsia sinensis cleaned after drying in 10mL deionized water, after being uniformly mixed
It is placed in autoclave and obtains brown color liquid in 200 DEG C of hydro-thermal reaction 27h, then obtained brown yellow solution is cooled to room
The aperture Wen Houyong is that 0.22 μm of membrane filtration obtains fluorescent carbon point, and the fluorescence intensity of the fluorescent carbon point is 971.
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