CN108998008A - ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques - Google Patents
ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques Download PDFInfo
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Abstract
The present invention relates to a kind of electro-deposition techniques, and ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ.It is characterized in that, using the mixed liquor of vulcanized sodium and alginic acid as electrodeposit liquid, metal zinc metal sheet carries out electro-deposition as the anode metal electrodes material of electro-deposition；Zinc ion is generated using the electrochemical reaction that metallic zinc on piece occurs in electrodeposition process, alginic acid and reacting between the coordination of zinc ion and sulphion and zinc ion are recycled, to be prepared in situ to obtain ZnS quantum dots/alginic acid nano composite membrane on the electrode.The present invention have it is easy to operate, easily controllable, without using organic solvent, environmentally protective, preparation condition is mild, and selectivity and the features such as controllability；Prepared ZnS quantum dots/alginic acid nanometer composite film material has the performance characteristics such as good biocompatibility, nontoxicity and biodegradability, has good application prospect in the fields such as bio-medical functional material and Bioelectronics.
Description
Technical field
The invention belongs to nano material, high molecular material, biomaterial, electrochemical field, it is related to a kind of utilizing electro-deposition
The method that quantum dot Yu natural polymer composite film material is prepared in situ in technology is made in situ more particularly to a kind of electro-deposition techniques
The method of standby ZnS quantum dots/alginic acid nano composite membrane.
Background technique
Quantum dot (Quantum dots), also referred to as semiconductor nano are one kind by II-VI group or iii-v atom
The nano material of composition, size is generally in 2-10nm.Relative to organic fluorescent dye and fluorescin, there is unique light
Learn performance, such as the advantages that adjustable emission spectrum, stronger fluorescence intensity, preferable photostability, thus bio-imaging,
The fields such as biomarker, light emitting diode, biological detection be with a wide range of applications [Nature methods, 2008,5:
763-775].Currently, quantum dot is widely used in different bio-imaging and biological fluorescent labelling field, such as fixed cell
Label, living cells imaging and fluorescence detection etc..However at present some common quantum dots often contain toxic heavy metal Cd, Hg,
The elements such as Pb.These quantum dots and organism can generate certain damage, especially quantum dot chemical group when contacting to organism
At the heavy metal element in ingredient to the toxic side effect of organism, these quantum dots are limited in the application of biological field, wherein
ZnS quantum dots without containing heavy metal element obtained numerous researchers concern [Nature materials, 2013,
12:359-366]。
Alginic acid is the natural polymer extracted from seaweed, it is that a kind of water-soluble biological with linear structure is more
Sugar, molecular structure are formed by 2 kinds of building block links of beta-D-mannuronic acid (M sections) and α-L- guluronic acid (G sections)
Linear block copolymers.It is worth noting that alginic acid can be with bivalent metal ion (such as Ca2+Ion) coordination work occurs
With to form the gel of tridimensional network.Content is very rich in nature for alginic acid, has from a wealth of sources, nontoxic
A series of performance characteristics and the advantage such as property, good biocompatibility, biodegradability, pH sensibility and film forming, usually
It is applied to the fields such as bio-medical material, biosensor, organizational project, sewage treatment and Food Science [Progress in
Polymer Science,2012,37:106-126]。
In recent years, the electro-deposition techniques of natural polymer are since with easy to operate, preparation condition is mild, have the time and
The advantages that selectivity and controllability in space, and function can be obtained on conductive metallic material surface by applying electric signal
Membrane material is interested by researchers.At present about the electro-deposition of alginic acid, usually using anode electrode, locally hydrolysis is produced
Raw hydrogen ion, the alginic acid near anode is to form gel in electrode surface in conjunction with hydrogen ion, and Cheong et al. is in sun
Pole deposited alginic acid/hydroxyapatite nanoparticle film [Colloids and Surface A, 2008,328:73~78].
In addition, alginic acid can also by with Ca2+Calcium alginate gel is formed to which electro-deposition occur, the electro-deposition of alginic acid is applied
In the fixation of cell, and construct bioavailability bracket material [Advanced Functional Materials, 2012,
22:519-528]。
In recent decades, CdS quantum dots are due to having attracted always science with unique physics and chemical property
The extensive research interest in boundary.It is worth noting that, the coprecipitated of quantum dot and natural polymer may be implemented using electro-deposition techniques
Product [ACS Applied Materials&Interfaces, 2014,6:15510-15515].However, the quantum dot carried out at present
Electro-deposition work with natural polymer is all made of the mode of co-deposition, and quantum dot is prepared in situ about using electro-deposition techniques
Research with natural high molecular composite material we have no related patents and document report.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of electro-deposition techniques is prepared in situ ZnS quantum dots/seaweed
The method of sour nano composite membrane, this method have the advantages that easy to operate, equipment is simple, easily controllable, low in cost.
The technical solution used in the present invention is: ZnS quantum dots/Na-alginate is prepared in situ in a kind of electro-deposition techniques
The method of rice composite membrane, which is characterized in that using the mixed liquor of vulcanized sodium and alginic acid as electrodeposit liquid, metal zinc metal sheet conduct
The anode metal electrodes material of electro-deposition carries out electro-deposition；Metal zinc metal sheet (anode metal electrodes material is utilized in electrodeposition process
Material) on the electrochemical reaction that occurs generate zinc ion, recycle the coordination and sulphion and zinc of alginic acid and zinc ion
Reaction between ion, to be prepared in situ to obtain ZnS quantum dots/alginic acid nano composite membrane on the electrode.
ZnS quantum dots/alginic acid nano composite membrane method, feature is prepared in situ in a kind of above-mentioned electro-deposition techniques
It is, it is comprised the following specific steps that:
1) preparation of sodium sulfide solution: weighing the vulcanized sodium solid particle of 0.48~2.4g, be added to and fill 100~
In the beaker of 200mL distilled water, it is completely dissolved within magnetic agitation 1~2 hour, is prepared to sodium sulphide solid body particle at room temperature
Molar concentration is the sodium sulfide solution of 0.02~0.05M；
2) preparation of seaweed acid solution: weighing the sodium alginate solid powder of 1~4g, is added to and fills 100~200mL steaming
In the beaker of distilled water, is sufficiently dissolved to sodium alginate within magnetic agitation 4~8 hours at room temperature, it is dense that mass percent is prepared
The seaweed acid solution that degree is 1.0~2.0%；
3) electrodeposit liquid of formulating vulcanization sodium and alginic acid: the sodium sulfide solution for taking 20~50ml step 1) to prepare is added
Into the beaker for the seaweed acid solution for filling the preparation of 20~50ml step 2), sufficiently mix within magnetic agitation 5~15 minutes at room temperature
It closes, then was uniformly mixed solution with Ultrasound Instrument ultrasonic disperse 5~15 minutes, preparation obtains the electro-deposition of vulcanized sodium and alginic acid
Liquid；
4) preparation of anode and cathode metal electrode material: the anode metal electrodes material using metal zinc metal sheet as electro-deposition
Metal zinc metal sheet, the electrode material of required size and shape is made first, using preceding metal zinc metal sheet of carefully being polished with sand paper, is made by material
Then metal zinc metal sheet is successively immersed acetone, dehydrated alcohol, is cleaned by ultrasonic in distilled water respectively by metal zinc metal sheet smooth surface
It is 3~5 minutes, spare；Platinized platinum is successively immersed acetone, dehydrated alcohol, steaming by the cathode electrode material using platinized platinum as electro-deposition
It is cleaned by ultrasonic respectively in distilled water 3~5 minutes, it is spare；
5) ZnS quantum dots/alginic acid nano composite membrane is prepared in situ in electro-deposition: by step 3) preparation vulcanized sodium with
Bubble removing is removed in electrodeposit liquid ultrasound 3~5 minutes of alginic acid, using the metal zinc metal sheet of preparation in step 4) as anode, with platinized platinum
As cathode, anode and cathode is connect respectively with high precision DC power supply, two electrodes are then put into vulcanized sodium and sea simultaneously
In the electrodeposit liquid of alginic acid, the distance between anode and cathode be 1~2cm, then using DC power supply apply constant voltage 1.0~
1.5V carries out electro-deposition, and sedimentation time is 5~15 minutes；DC power supply is closed after to electro-deposition immediately, takes out anode (i.e.
Metal zinc metal sheet), it is cleaned repeatedly with distilled water 3~6 times, ZnS quantum dots/seaweed is prepared in metal zinc metal sheet surface in situ
Sour nano composite membrane.
The power of the Ultrasound Instrument is 40~50W.
This ZnS quantum dots being prepared in situ on electrode material using electro-deposition techniques/alginic acid nano composite membrane
Have in terms of the fields of biomedicine such as fluorescent marker, bio-imaging, control release, fluorescent functional material and functional material good
Application value.
Technical principle of the invention: in electrodeposition process, the electricity that occurs on anode metal electrodes material (metal zinc metal sheet)
Chemical reaction can generate metal zinc ion, these metal zinc ions can generate coordination with seaweed acid molecule, to make
Seaweed acid molecule can deposit to form gel mould in anode metal electrodes material surface；On the other hand, the sulphion in system can
To react between the zinc ion that generates on anode metal electrodes material (metal zinc metal sheet), it is formed by alginic acid gel mould
The sulphion being also used as in system reacts the dispersing agent and stabilizer for generating quantum dot with zinc ion, therefore utilizes electro-deposition
Technology is prepared in situ to obtain ZnS quantum dots/alginic acid nanometer composite film material.
The characteristics of ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques of the present invention
Be with advantage: this method is easily controllable, equipment is simple and convenient to operate, preparation condition is mild, also has time and spatial choice
The features such as property and controllability.This method is without using organic solvent, green and pollution-free simultaneously, and directly on electrode material
It is prepared in situ to obtain ZnS quantum dots/alginic acid nano composite membrane, it can also be by changing electrodeposition condition (such as electro-deposition
Time, deposition voltage) ZnS quantum dots/alginic acid nano composite membrane thickness is controlled.In addition, being existed using this method
ZnS quantum dots/alginic acid nanometer the composite film surface being prepared in situ on anode metal electrodes material (metal zinc metal sheet) is uniform,
There is no bubble, flat and smooth, and is easy to peel off to obtain complete ZnS quantum dots/alginic acid nanometer from electrode material surface
Composite membrane is conducive to the quantum dot/direct subsequent applications of natural polymer nano composite membrane and exclusive use.The technology uses day
As electrodeposit liquid quantum dot/alginic acid nano composite membrane is prepared in situ using electro-deposition techniques, this is received in right polymeric hydantoin alginic acid
There is rice composite membrane good biocompatibility, nontoxicity and biodegradability to make it in bio-medical functional material, life
Object electronic device, biosensor and detector etc. have a good application prospect.
The beneficial effects of the present invention are:
1) ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques of the present invention, should
Method uses vulcanized sodium and alginic acid as electrodeposit liquid, and the anode electrode material using metallic zinc as electro-deposition utilizes electricity
Deposition technique is directly prepared in situ to obtain the nano combined membrane material of quantum dot/natural polymer in metallic zinc on piece.
2) ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques of the present invention, should
Method have it is easy to operate, equipment is simple, easily controllable, low in cost, also have time and spatial selectivity and controllability etc.
Features and advantages.While this method is without using organic solvent, green and pollution-free, preparation condition is mild；It can also be by changing
Power transformation depositional control condition (such as electrodeposition time, deposition voltage), to ZnS quantum dots/alginic acid nano composite membrane thickness
Degree is regulated and controled.
3) ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques of the present invention, should
Method preparation nano composite membrane in ZnS quantum dots do not contain toxic heavy-metal elements, and alginic acid also have it is good
Biocompatibility and biodegradability, therefore prepared ZnS quantum dots/alginic acid nanometer composite film material is with good
Performance characteristics and the advantages such as good biocompatibility, nontoxicity and biodegradability, in bio-medical material, bioelectronics
There is good application prospect in the fields such as device, biosensor and detector.
4) ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques of the present invention, should
It is ZnS quantum dots prepared by method/alginic acid nanometer composite film surface bubble-free, smooth, and be easy to from electrode surface
It removes, is conducive to the quantum dot/direct subsequent applications of natural polymer nano composite membrane and exclusive use.
5) present invention prepared by ZnS quantum dots/alginic acid nano composite membrane have fluorescence property, fluorescent marker,
Has good application value in terms of the fields of biomedicine such as bio-imaging, control release, fluorescent functional material and functional material.
Detailed description of the invention
Fig. 1 is the zinc sulphide amount being prepared in situ using electro-deposition techniques in metallic zinc on piece in the embodiment of the present invention 1
Sub- point/alginic acid nano composite membrane photo.
Fig. 2 is the ZnS quantum dots/alginic acid nano composite membrane transmitted electron being prepared in the embodiment of the present invention 2
Microscope photo.
Fig. 3 is ZnS quantum dots/alginic acid nano composite membrane for being prepared in the embodiment of the present invention 3 in 302nm purple
Fluorescence photo under outer lamp.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples, and certain following embodiments should not be construed as pair
Limitation of the invention.
The present invention provides a kind of electro-deposition techniques and ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ,
The technology of the present invention is described further combined with specific embodiments below, but does not limit the present invention.
Embodiment 1
ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques, it includes as follows
Specific steps:
1) preparation of sodium sulfide solution: the vulcanized sodium solid particle of 0.48g is weighed, is added to and fills 100mL distilled water
It in beaker, is completely dissolved at room temperature to sodium sulphide solid body particle within magnetic agitation 1 hour, it is 0.02M that molar concentration, which is prepared,
Sodium sulfide solution；
2) preparation of seaweed acid solution: the sodium alginate solid powder of 1g is weighed, the burning for filling 100mL distilled water is added to
It in cup, is sufficiently dissolved to sodium alginate within magnetic agitation 4 hours at room temperature, it is 1.0% that mass percent concentration, which is prepared,
Sodium alginate soln；
3) electrodeposit liquid of formulating vulcanization sodium and alginic acid: the sodium sulfide solution for taking 20ml step 1) to prepare is added to Sheng
In the beaker for the seaweed acid solution for having 20ml step 2) to prepare, it is sufficiently mixed within magnetic agitation 5 minutes at room temperature, then use Ultrasound Instrument
It is uniformly mixed solution, preparation obtains the electrodeposit liquid of vulcanized sodium and alginic acid；
4) preparation of anode and cathode metal electrode material: the anode metal electrodes material using metal zinc metal sheet as electro-deposition
These anode metal electrodes materials, the sheet metal of different sizes and shapes is made first, is carefully polished using preceding with sand paper by material
Anode metal electrodes material (metal zinc metal sheet), makes its smooth surface, anode metal electrodes material is successively then immersed third
Ketone, dehydrated alcohol are cleaned by ultrasonic 3 minutes respectively in distilled water, spare；Cathode electrode material using platinized platinum as electro-deposition,
It successively immerses acetone, dehydrated alcohol, be cleaned by ultrasonic respectively 3 minutes in distilled water, it is spare；
5) ZnS quantum dots/alginic acid nano composite membrane is prepared in situ in electro-deposition: take step 3) prepare vulcanized sodium with
The electrodeposit liquid ultrasound of alginic acid removes bubble removing in 3 minutes, using the metal zinc metal sheet for preparing in step 4) as anode, using platinized platinum as
Anode and cathode is connect by cathode with DC power supply (high precision DC power supply) respectively, and two electrodes are then put into vulcanization simultaneously
In the electrodeposit liquid of sodium and alginic acid, the distance between two electrodes are 1cm；Applied using high-precision programmable DC power supply constant
Voltage 1.0V, carries out electro-deposition, and sedimentation time is 5 minutes；Power supply is closed after electro-deposition immediately, takes out metal zinc metal sheet, is used
Distilled water carefully cleans 3 times, obtains the ZnS quantum dots/sodium alginate for being electrodeposited in the preparation of anode metal zinc metal sheet surface in situ
Nano composite membrane.
Fig. 1 is the zinc sulphide amount being prepared in situ using electro-deposition techniques in metallic zinc on piece in the embodiment of the present invention 1
Sub- point/alginic acid nano composite membrane photo.By Fig. 1 it can be found that, as electrodeposit liquid, being adopted when using vulcanized sodium and alginic acid
When using zinc metal sheet as anode metal electrodes material, gel mould is formd on the surface of metal zinc metal sheet after electro-deposition, the gel
Film is transparent uniform, smooth surface, without bubble, and has certain thickness, and illustrating can be in gold using electro-deposition techniques
Belong to zinc metal sheet electrode surface to be prepared in situ to obtain ZnS quantum dots/alginic acid nano composite membrane.
Embodiment 2
ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques, it includes as follows
Specific steps:
1) preparation of sodium sulfide solution: the vulcanized sodium solid particle of 0.96g is weighed, is added to and fills 100mL distilled water
It in beaker, is completely dissolved at room temperature to sodium sulphide solid body particle within magnetic agitation 2 hours, it is 0.04M that molar concentration, which is prepared,
Sodium sulfide solution；
2) preparation of seaweed acid solution: the sodium alginate solid powder of 2g is weighed, the burning for filling 100mL distilled water is added to
It in cup, is sufficiently dissolved to sodium alginate within magnetic agitation 6 hours at room temperature, it is 2.0% that mass percent concentration, which is prepared,
Sodium alginate soln；
3) electrodeposit liquid of formulating vulcanization sodium and alginic acid: the sodium sulfide solution for taking 30ml step 1) to prepare is added to Sheng
It in the beaker for the seaweed acid solution for thering is 30ml step 2) to prepare, is sufficiently mixed within magnetic agitation 10 minutes at room temperature, then with ultrasonic
It is uniformly mixed solution, preparation obtains the electrodeposit liquid of vulcanized sodium and alginic acid；
4) preparation of anode and cathode metal electrode material: the anode metal electrodes material using metal zinc metal sheet as electro-deposition
These anode metal electrodes materials, the sheet metal of different sizes and shapes is made first, is carefully polished using preceding with sand paper by material
Anode metal electrodes material (metal zinc metal sheet), makes its smooth surface, anode metal electrodes material is successively then immersed third
Ketone, dehydrated alcohol are cleaned by ultrasonic 5 minutes respectively in distilled water, spare；Cathode electrode material using platinized platinum as electro-deposition,
It successively immerses acetone, dehydrated alcohol, be cleaned by ultrasonic respectively 5 minutes in distilled water, it is spare；
5) ZnS quantum dots/alginic acid nano composite membrane is prepared in situ in electro-deposition: take step 3) prepare vulcanized sodium with
The electrodeposit liquid ultrasound of alginic acid removes bubble removing in 5 minutes, using the metal zinc metal sheet for preparing in step 4) as anode, using platinized platinum as
Anode and cathode is connect by cathode with DC power supply (high precision DC power supply) respectively, and two electrodes are then put into vulcanization simultaneously
In the electrodeposit liquid of sodium and alginic acid, the distance between two electrodes are 1cm.Applied using high-precision programmable DC power supply constant
Voltage 1.2V, carries out electro-deposition, and sedimentation time is 10 minutes.Power supply is closed after electro-deposition immediately, takes out metal zinc metal sheet, is used
Distilled water carefully cleans 3 times, obtains the ZnS quantum dots/Na-alginate for being electrodeposited in the preparation of anode metal zinc metal sheet surface in situ
Rice composite membrane, and ZnS quantum dots/alginic acid nano composite membrane fluorescence property is observed with 302nm ultraviolet lamp.
Fig. 2 is the ZnS quantum dots/alginic acid nano composite membrane transmitted electron being prepared in the embodiment of the present invention 2
Microscope photo.Specific testing procedure are as follows: first at normal temperature by prepared ZnS quantum dots/alginic acid nano composite membrane
It is dry, the ZnS quantum dots after drying/alginic acid nano composite membrane is pulverized, sample is made, then sample is delayed in PBS
Ultrasonic disperse in solution (pH=7.0) is rushed, is then dripped in clean transmission electron microscope special purpose copper net surface, then adopted after copper mesh is dried
It is detected with high-resolution-ration transmission electric-lens (HRTEM, JEM-2100F STEM/EDS, JP).From Fig. 2 it can be found that nanoparticle
Partial size than more uniform, it is well dispersed in system, and its average grain diameter is in 5nm or so, shows prepared zinc sulphide amount
The presence of ZnS quantum dots in sub- point/alginic acid nano composite membrane.
Embodiment 3
ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques, it includes as follows
Specific steps:
1) preparation of sodium sulfide solution: the vulcanized sodium solid particle of 2.4g is weighed, the burning for filling 200mL distilled water is added to
It in cup, is completely dissolved at room temperature to sodium sulphide solid body particle within magnetic agitation 2 hours, it is 0.05M's that molar concentration, which is prepared,
Sodium sulfide solution；
2) preparation of seaweed acid solution: the sodium alginate solid powder of 4g is weighed, the burning for filling 200mL distilled water is added to
It in cup, is sufficiently dissolved to sodium alginate within magnetic agitation 8 hours at room temperature, it is 2.0% that mass percent concentration, which is prepared,
Sodium alginate soln；
3) formulating vulcanization sodium and alginic acid electrodeposit liquid: the sodium sulfide solution for taking 50ml step 1) to prepare is added to and fills
In the beaker for the seaweed acid solution that 50ml step 2) is prepared, it is sufficiently mixed within magnetic agitation 15 minutes at room temperature, then use Ultrasound Instrument
It is uniformly mixed solution, preparation obtains the electrodeposit liquid of vulcanized sodium and alginic acid；
4) preparation of anode and cathode metal electrode material: the anode metal electrodes material using metal zinc metal sheet as electro-deposition
These anode metal electrodes materials, the sheet metal of different sizes and shapes is made first, is carefully polished using preceding with sand paper by material
Anode metal electrodes material (metal zinc metal sheet), makes its smooth surface, anode metal electrodes material is successively then immersed third
Ketone, dehydrated alcohol are cleaned by ultrasonic 5 minutes respectively in distilled water, spare；Cathode electrode material using platinized platinum as electro-deposition,
It successively immerses acetone, dehydrated alcohol, be cleaned by ultrasonic respectively 5 minutes in distilled water, it is spare；
5) ZnS quantum dots/alginic acid nano composite membrane is prepared in situ in electro-deposition: take step 3) prepare vulcanized sodium with
The electrodeposit liquid ultrasound of alginic acid removes bubble removing in 5 minutes, using the metal zinc metal sheet for preparing in step 4) as anode, using platinized platinum as
Anode and cathode is connect by cathode with DC power supply (high precision DC power supply) respectively, and two electrodes are then put into vulcanization simultaneously
In the electrodeposit liquid of sodium and alginic acid, the distance between two electrodes are 2cm.Applied using high-precision programmable DC power supply constant
Voltage 1.5V, carries out electro-deposition, and sedimentation time is 15 minutes.Power supply is closed after electro-deposition immediately, takes out metal zinc metal sheet, is used
Distilled water carefully cleans 6 times, and the ZnS quantum dots/alginic acid nanometer for obtaining being electrodeposited in the preparation of metal zinc metal sheet surface in situ is multiple
Film is closed, and observes ZnS quantum dots/alginic acid nano composite membrane fluorescence property with 302nm ultraviolet lamp.
Fig. 3 is ZnS quantum dots/alginic acid nano composite membrane for being prepared in the embodiment of the present invention 3 in 302nm purple
Fluorescence photo under outer lamp.By Fig. 3 it can be found that prepared ZnS quantum dots/alginic acid nano composite membrane is in 302nm purple
Fairly obvious blue-fluorescence is shown under the irradiation of outer lamp, this also shows the presence of ZnS quantum dots in composite membrane, this
Prepared ZnS quantum dots/alginic acid the nano composite membrane of invention has fluorescence property, in fluorescent marker, bio-imaging, control
Has good application value in terms of the fields of biomedicine such as system release, fluorescent functional material and functional material.
It should be noted that those skilled in the art should understand that, technical solution of the present invention can be carried out
Modification or equivalent replacement should all cover and want in right of the invention without departing from the objective and range of technical solution of the present invention
It asks in range.
Claims (2)
1. ZnS quantum dots/alginic acid nano composite membrane method is prepared in situ in a kind of electro-deposition techniques, which is characterized in that adopt
Use the mixed liquor of vulcanized sodium and alginic acid as electrodeposit liquid, metal zinc metal sheet is carried out as the anode metal electrodes material of electro-deposition
Electro-deposition；In electrodeposition process using metallic zinc on piece occur electrochemical reaction generate zinc ion, recycle alginic acid with
Reacting between the coordination and sulphion and zinc ion of zinc ion, to be prepared in situ to obtain zinc sulphide amount on the electrode
Sub- point/alginic acid nano composite membrane.
2. ZnS quantum dots/alginic acid nano composite membrane is prepared in situ in a kind of electro-deposition techniques according to claim 1
Method, which is characterized in that it is comprised the following specific steps that:
1) preparation of sodium sulfide solution: weighing the vulcanized sodium solid particle of 0.48~2.4g, is added to and fills 100~200mL steaming
It in the beaker of distilled water, is completely dissolved within magnetic agitation 1~2 hour, is prepared mole dense to sodium sulphide solid body particle at room temperature
Degree is the sodium sulfide solution of 0.02~0.05M；
2) preparation of seaweed acid solution: the sodium alginate solid powder of 1~4g is weighed, is added to and fills 100~200mL distilled water
Beaker in, sufficiently dissolved to sodium alginate within magnetic agitation 4~8 hours at room temperature, mass percent concentration, which is prepared, is
1.0~2.0% seaweed acid solution；
3) electrodeposit liquid of formulating vulcanization sodium and alginic acid: the sodium sulfide solution for taking 20~50ml step 1) to prepare is added to Sheng
In the beaker for the seaweed acid solution for having 20~50ml step 2) to prepare, it is sufficiently mixed within magnetic agitation 5~15 minutes at room temperature, then
It was uniformly mixed solution with Ultrasound Instrument ultrasonic disperse 5~15 minutes, preparation obtains the electrodeposit liquid of vulcanized sodium and alginic acid；
4) preparation of anode and cathode metal electrode material: the anode metal electrodes material using metal zinc metal sheet as electro-deposition,
Metal zinc metal sheet is made to the electrode material of required size and shape first, using it is preceding with sand paper polish metal zinc metal sheet, make metallic zinc
Then metal zinc metal sheet is successively immersed acetone, dehydrated alcohol, is cleaned by ultrasonic 3~5 points respectively in distilled water by piece smooth surface
Clock, it is spare；Platinized platinum is successively immersed acetone, dehydrated alcohol, in distilled water by the cathode electrode material using platinized platinum as electro-deposition
It is cleaned by ultrasonic 3~5 minutes respectively, it is spare；
5) ZnS quantum dots/alginic acid nano composite membrane is prepared in situ in electro-deposition: by the vulcanized sodium of step 3) preparation and seaweed
Acid removes bubble removing in electrodeposit liquid ultrasound 3~5 minutes, using the metal zinc metal sheet for preparing in step 4) as anode, using platinized platinum as
Anode and cathode is connect by cathode with DC power supply respectively, and then electricity that two electrodes are put into vulcanized sodium and alginic acid simultaneously sinks
In hydrops, the distance between anode and cathode is 1~2cm, then applies 1.0~1.5V of constant voltage using DC power supply and carry out electricity
Deposition, sedimentation time are 5~15 minutes；DC power supply is closed after to electro-deposition immediately, takes out anode, wash with distilled water
3~6 times, ZnS quantum dots/alginic acid nano composite membrane is prepared in metal zinc metal sheet surface in situ.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767639.0A CN108998008B (en) | 2018-07-13 | 2018-07-13 | Method for in-situ preparation of zinc sulfide quantum dot/alginic acid nano composite membrane by electrodeposition technology |
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