CN107572505A - A kind of preparation method of Ag doping graphene quantum dot - Google Patents
A kind of preparation method of Ag doping graphene quantum dot Download PDFInfo
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- CN107572505A CN107572505A CN201610516357.4A CN201610516357A CN107572505A CN 107572505 A CN107572505 A CN 107572505A CN 201610516357 A CN201610516357 A CN 201610516357A CN 107572505 A CN107572505 A CN 107572505A
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Abstract
A kind of preparation method of the graphene quantum dot of metallic element doping, belongs to technical field of nano material, and in particular to the Hydrothermal Synthesiss technology of preparing of Ag doping graphene quantum dot.The hydrothermal preparing process of a kind of Ag doping graphene quantum dot of the present invention, it is characterised in that sugar generates water-soluble metal Ag doping graphene quantum dot with silver acetate under hydrothermal reaction condition.The technology of the present invention is related to the introducing metal silver ion into graphene quantum dot, and the more excellent photoelectric properties of graphene quantum dot are realized by adjusting graphene quantum dot level structure.The preparation method process is easy, and the cost of raw material is low, equipment is simple, is advantageous to enterprise scale production, and obtained quantum dot good water solubility, fluorescence property is notable, there is important application value in fields such as photocatalysis, photoelectron, solar cell and chemical sensitisations.
Description
Technical field
The present invention relates to a kind of preparation method of metal-silver-doped graphene quantum dot, by adding into graphene quantum dot
Enter doped chemical silver, new level structure is introduced in graphene forbidden band, realizes that the band gap of graphene quantum dot is adjustable.The present invention
Belong to technical field of nanometer material preparation.Preparation technology simplicity, safety, cost are low in the present invention, and product has good water solubility, glimmering
The advantages that optical property is notable, size uniform.
Background technology
In recent years, a focus of the graphene as investigation of materials field, is constantly subjected to the favor of scientific research personnel.As stone
A member of Mo Xi families, graphene quantum dot is except the excellent properties with graphene, also because quantum confined effect, surface are imitated
Should, Dielectric confinement effect and show a series of new characteristics, therefore attracted each field such as chemistry, physics, material and biology
The extensive concern of scientist.But the defects of its fluorescence quantum yield is not high, avtive spot is relatively fewer, limits to a certain extent
Its application in practice, and then can solve these to a certain extent using exotic atom doped graphene quantum dot and ask
Topic.
With deepening continuously for graphene research, some special performances that graphene low-dimensional materials are shown are also increasingly
Attract attention.According to quantum confined effect, quantum size effect, edge effect scheduling theory, the various nano materials of graphene are striven
Mutually occur, wherein, graphene quantum dot is graphene all restricted nano material in three dimensions, and it opens graphene
Band gap, compensate for the shortcoming of the band gap of graphene zero.For the performance of further optimization graphene quantum dot, researcher is carried out to it
Doping treatment, as a result obtain the adjustable graphene quantum dot of band gap.Graphene has been expanded in bio-imaging, microelectronics, function
The broad development space in the fields such as material, chemical sensitisation, solar cell.
At present, the doped chemical research of graphene quantum dot is concentrated mainly on the nonmetalloids such as N, S, CL, F,
Less to metal-doped research, the metal-doped performance that can effectively improve graphene at optically and electrically aspect, this is to stone
The application and development of black alkene is significant.At this stage, the technology of preparing of nano material is broadly divided into two classes：" from top to bottom "
" from bottom to top " method.The former is that directly large scale material is cut by a series of physics, chemistry and electrochemical process
It is cut into as nano-scale；The latter focuses on chemical synthesis, is using some small molecules as presoma, is converted by chemically reacting
For nano material." from top to bottom " method is due to being main at this stage with the advantage such as preparation technology is simple, production cost is low
One of preparation method of nano material.
It is 201410362337.5 in number of patent application, entitled " Ag doping graphene extrusion coating paper and preparation method thereof "
In Chinese patent, it is ultrasonically treated by raw material of graphene oxide, is adding nitric acid silver reaction, product must arrive silver through pervaporation
Graphene oxide is adulterated, then Ag doping graphene is obtained by reduction treatment.It is entitled " a kind of nitrogen-doped graphene quantum dot
Chemical preparation process "（Number of patent application is 201410376809.4）Chinese patent in, it is sweet by the use of graphite oxide as carbon source
Nitrogen-doped graphene quantum dot is made as nitrogen source in propylhomoserin under high temperature annealing condition., this hair different from foregoing invention of the invention
Bright technology, which is related to, prepares graphene quantum dot, and into graphene quantum dot introduce impurity element silver, using sugar and silver acetate as
Raw material obtain Ag doping graphene quantum dot by hydro-thermal process, have good water solubility, size small and uniformly and fluoresce
Etc. characteristic.
The content of the invention
The present invention realizes the easy of silver element doped graphene quantum dot with simple step chemical reaction and prepared, the gold
The incorporation for belonging to element plays an important role to the modulation of graphene quantum dot level structure, while changes the properties of graphene.
A kind of hydro-thermal synthetic preparation method of Ag doping graphene quantum dot in the present invention, using sugar and silver acetate as raw material, deionization
Water is solvent, and water-soluble metal Ag doping graphene quantum dot is prepared with reaction under pressure at a certain temperature.
The present invention Ag doping graphene quantum dot hydro-thermal synthetic preparation method, it is characterised in that this method be by with
Under step realize：The first step, proper amount of sugar and silver acetate solid are taken, add deionized water stirring it is fully dissolved；Second step,
The solution that the first step configures is transferred in hydrothermal reaction kettle, isothermal reaction a few hours；3rd step, after reaction terminates, take product
Carry out dialysis purification, you can obtain the aqueous solution of Ag doping graphene quantum dot.
Wherein, the sugar described in the first step can be any one in fructose, glucose or sucrose, and sugared dosage is 0.5 gram,
0.2 gram of silver acetate, 40 milliliters of deionized water.
Wherein, the solution prepared is transferred in hydrothermal reaction kettle by second step, and reactor is placed in 170 DEG C of constant temperature oven
Middle reaction, time are 4 hours.
Wherein, the 3rd step takes out reaction solution bag filter dialysis purification, and dialysis time is 10~20 minutes.
Ag doping graphene quantum dot effectively increases the electronic transition energy of graphene while graphene band gap is opened
Level., will be in sp by toward metal silver ion is mixed in graphene quantum dot2The π and π of carbon*Silver-colored energy level is introduced between energy level, is realized
Electron transition mode diversification, this is advantageous to material answering in fields such as photocatalysis, bio-imaging, opto-electronic device and detectors
With.
The present invention has the following advantages that：（1）Cost is cheap：What Ag doping graphene quantum dot prepared by the present invention used
Reaction unit is hydrothermal reaction kettle, and reaction temperature requires low, has the advantages of high efficiency, low cost；（2）Safety and environmental protection：Present invention system
Reactant used in standby Ag doping graphene quantum dot is nontoxic, pollution-free, and whole preparation process is without potential safety hazard；（3）Product water
Dissolubility is good：Ag doping graphene quantum dot prepared by the present invention has a variety of hydrophilic functional groups, therefore soluble in water；（4）Production
Thing fluorescent characteristic is notable：Ag doping graphene quantum dot prepared by the present invention, fluoresces under ultraviolet light, be advantageous to it
The application in the fields such as bio-imaging, fluorescence labeling.
Brief description of the drawings
Fig. 1 is Ag doping graphene quantum dot transmission electron microscope picture.
Fig. 2 is Ag doping graphene quantum dot X-ray diffractogram.
Fig. 3 is photoluminescence spectrum of the Ag doping graphene quantum dot in the case where wavelength is 440 nm exciting lights.
Fig. 4 is Ag doping graphene quantum dot ultraviolet visible absorption spectra.
Embodiment
Embodiment 1：0.5 gram of sucrose is weighed, 0.2 gram of silver acetate, adding 40 ml deionized waters makes reactant fully dissolve.
The reaction solution configured is transferred in hydrothermal reaction kettle, is put into heated at constant temperature 4 hours in 170 DEG C of baking oven.After reaction terminates,
Solution is taken out, dialysis purification is carried out to sample with bag filter, the time is 15~20 minutes, and bag filter external environment is deionization
Water, finally collect and obtain potassium doped graphene quantum dot solution.
Claims (5)
1. a kind of hydro-thermal synthetic preparation method of Ag doping graphene quantum dot, it is characterised in that this method is by following
What step was realized：
The first step, proper amount of sugar and silver acetate is taken to add deionized water stirring to be uniformly dissolved it；
Second step, the first step is obtained into solution and is transferred in hydrothermal reaction kettle, carry out isothermal reaction；
3rd step, after reaction terminates, negate solution after answering and carry out dialysis purification with bag filter, collect product.
2. the hydro-thermal synthetic preparation method of a kind of Ag doping graphene quantum dot according to right 1, it is characterised in that described
Sugar can be any one in fructose, glucose or sucrose.
3. the hydro-thermal synthetic preparation method of a kind of Ag doping graphene quantum dot according to right 1, it is characterised in that first
It is 0.5 gram to walk sugared dosage, 0.2 gram of silver acetate, 40 milliliters of deionized water.
4. the hydro-thermal synthetic preparation method of a kind of Ag doping graphene quantum dot according to right 1, it is characterised in that second
It is 170 DEG C to walk isothermal reaction condition, and the reaction time is 4 hours.
5. the hydro-thermal synthetic preparation method of a kind of Ag doping graphene quantum dot according to right 1, it is characterised in that the 3rd
Walk the use bag filter to dialyse to product, purify, dialysis time is 10~20 minutes.
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| CN201610516357.4A CN107572505A (en) | 2016-07-04 | 2016-07-04 | A kind of preparation method of Ag doping graphene quantum dot |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318438A (en) * | 2018-01-19 | 2018-07-24 | 广东工业大学 | The detection method of Ag doping fluorescent carbon quantum dot, preparation method and cholesterol |
| CN108892130A (en) * | 2018-04-04 | 2018-11-27 | 三峡大学 | The green synthesis method of graphene quantum dot is prepared using starch |
| CN110052267A (en) * | 2019-05-07 | 2019-07-26 | 三峡大学 | The preparation method and applications of the stable silver of graphene quantum dot and/or rhodium nanoparticles |
| CN110064389A (en) * | 2019-04-22 | 2019-07-30 | 三峡大学 | The preparation method and applications of the stable silver-colored rhodium duplex metal nano granule of graphene quantum dot |
| CN110066655A (en) * | 2019-05-14 | 2019-07-30 | 安徽师范大学 | Ag doping carbon quantum dot and its preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103172051A (en) * | 2013-04-16 | 2013-06-26 | 苏州大学 | Water-soluble carbon quantum dot and preparation method thereof |
| CN103359727A (en) * | 2013-07-24 | 2013-10-23 | 云南师范大学 | Preparation method of oxygen and chlorine co-doped graphene quantum dots |
| CN103833029A (en) * | 2014-01-10 | 2014-06-04 | 云南师范大学 | Preparation method of high-efficient multicolor-fluorescence water-soluble sulfur oxygen-codoped graphene quantum dot |
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2016
- 2016-07-04 CN CN201610516357.4A patent/CN107572505A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103172051A (en) * | 2013-04-16 | 2013-06-26 | 苏州大学 | Water-soluble carbon quantum dot and preparation method thereof |
| CN103359727A (en) * | 2013-07-24 | 2013-10-23 | 云南师范大学 | Preparation method of oxygen and chlorine co-doped graphene quantum dots |
| CN103833029A (en) * | 2014-01-10 | 2014-06-04 | 云南师范大学 | Preparation method of high-efficient multicolor-fluorescence water-soluble sulfur oxygen-codoped graphene quantum dot |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318438A (en) * | 2018-01-19 | 2018-07-24 | 广东工业大学 | The detection method of Ag doping fluorescent carbon quantum dot, preparation method and cholesterol |
| CN108892130A (en) * | 2018-04-04 | 2018-11-27 | 三峡大学 | The green synthesis method of graphene quantum dot is prepared using starch |
| CN110064389A (en) * | 2019-04-22 | 2019-07-30 | 三峡大学 | The preparation method and applications of the stable silver-colored rhodium duplex metal nano granule of graphene quantum dot |
| CN110052267A (en) * | 2019-05-07 | 2019-07-26 | 三峡大学 | The preparation method and applications of the stable silver of graphene quantum dot and/or rhodium nanoparticles |
| CN110066655A (en) * | 2019-05-14 | 2019-07-30 | 安徽师范大学 | Ag doping carbon quantum dot and its preparation method and application |
| CN110066655B (en) * | 2019-05-14 | 2022-04-12 | 安徽师范大学 | Silver-doped carbon quantum dot and preparation method and application thereof |
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