CN115029929A - Preparation method and application of flexible conductive fiber membrane of gold nanoparticle conformal coating - Google Patents
Preparation method and application of flexible conductive fiber membrane of gold nanoparticle conformal coating Download PDFInfo
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- CN115029929A CN115029929A CN202210602672.4A CN202210602672A CN115029929A CN 115029929 A CN115029929 A CN 115029929A CN 202210602672 A CN202210602672 A CN 202210602672A CN 115029929 A CN115029929 A CN 115029929A
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- 239000012528 membrane Substances 0.000 title claims abstract description 74
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 71
- 239000010931 gold Substances 0.000 title claims abstract description 71
- 239000002105 nanoparticle Substances 0.000 title claims abstract description 69
- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 238000000576 coating method Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims abstract description 13
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
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- OTLGFUHTYPXTTG-UHFFFAOYSA-M indium(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[In+3] OTLGFUHTYPXTTG-UHFFFAOYSA-M 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
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- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/22—Polymers or copolymers of halogenated mono-olefins
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/50—Modified hand or grip properties; Softening compositions
Abstract
The invention discloses a preparation method and application of a flexible conductive fiber membrane of a gold nanoparticle conformal coating. The fiber membrane is firstly placed in an alkaline aqueous solution of dopamine hydrochloride for self-polymerization reaction, and the fixation and chemical gold plating of gold nanoparticles are carried out on the surface of the fiber, so that the flexible conductive fiber membrane with the gold nanoparticle conformal coating, which is uniform in surface, continuous and uniform, is obtained. The flexible conductive fiber membrane of the invention keeps the flexibility of the original fiber because the surface and the inside of the fiber membrane are coated with a uniform, continuous and smooth gold nanoparticle conformal coating, and forms a three-dimensional conductive fiber network with a single side and two sides which are both communicated, thereby having excellent conductivity. The invention endows the fiber chemical plating layer with the characteristics of uniformity, continuity, smoothness, firm plating layer, stable conduction and the like, and the prepared flexible conductive fiber forms a three-dimensional conductive network, can keep the stability of conduction under small deformation, is suitable for any type of non-planar fiber substrate and has wide preparation applicability.
Description
Technical Field
The invention relates to the technical field of conductive materials, in particular to a preparation method and application of a flexible conductive fiber membrane of a gold nanoparticle conformal coating.
Background
In recent years, flexible conductive fiber films have been widely used in the fields of flexible wearable electronic devices, electromagnetic shielding, sensors, energy storage, and the like, due to their characteristics of flexibility, high conductivity, reworkability, and the like. At present, conductive fiber films are mainly classified into carbon-based materials and organic high-molecular polymer-based materials. The conductive fiber film represented by a carbon-based material is mainly carbon paper and carbon woven cloth. Such carbon-based materials are poorly flexible, are not resistant to bending, and have poor stability in strong alkaline environments or at high current densities. The organic high molecular polymer-based material can keep the flexibility of the fiber membrane, and particularly, the high-conductivity metal particles are combined with the flexible spinning fiber membrane, so that the original advantages of the fiber membrane can be kept, and the excellent conductivity and electrochemical performance of metal can be realized.
Several common methods for depositing metal particles on flexible fiber membranes are mainly physical vapor deposition, chemical vapor deposition, electroplating and electroless plating. While the first three methods allow for precise control of the composition and thickness of the metal film, they have some requirements that rely on expensive vacuum equipment and some require the application of a power source to deposit the film. A prerequisite for achieving galvanic deposition is that the flexible substrate must be electrically conductive. Furthermore, it is difficult to create a three-dimensional flexible conductive material with a controlled structural morphology using the three methods described above. In order to solve the above problems, electroless plating is a method of depositing a uniform and continuous metal thin film on conductive and non-conductive substrates directly from a plating solution using a reducing agent, which can be carried out in a solution without a direct current power supply and complicated equipment. At present, the deposition of nanoparticles such as copper, silver, platinum and the like on a fiber membrane is successfully realized by using an electroless plating method, but reports on the deposition of gold nanoparticles on a flexible fiber membrane are few, and the method of depositing gold nanoparticles on a planar polystyrene membrane is disclosed in documents (Gabardo, Christine M., et al. scientific reports 7.1(2017):1-9.), and the steps are complicated, the flow time is long, and colloidal gold is easy to agglomerate.
Disclosure of Invention
The invention aims to provide a simple, easy, low-cost, green and environment-friendly preparation method of a flexible conductive fiber film with a gold nanoparticle conformal coating, which is characterized by uniform, continuous and smooth chemical plating layer of fibers, firm plating layer and the like, and the prepared flexible conductive fiber film forms a three-dimensional conductive network and can keep the conductive stability under small deformation.
In order to achieve the above purpose, the invention is realized by the following technical method:
a preparation method of a flexible conductive fiber membrane of a gold nanoparticle conformal coating comprises the following steps:
(1) placing the surface of the fiber membrane in an alkaline aqueous solution of dopamine hydrochloride, carrying out self-polymerization reaction on the surface of the fiber membrane, after reacting for a certain time, ultrasonically cleaning, washing with deionized water, and drying to obtain a polydopamine modified nano fiber membrane;
(2) placing the polydopamine modified nanofiber membrane in the step (1) in a colloidal solution of gold nanoparticles, wherein the gold nanoparticles are electrostatically and chemically adsorbed on the surface of the fiber to form a single layer of gold nanoparticles;
(3) and (3) carrying out seed growth on the fiber membrane of the single-layer gold nanoparticles formed in the step (2), growing the gold nanoparticles into large nanoparticles on the basis of the original gold seeds, then condensing, and finally forming a continuous, uniform, smooth, complete and compact gold nanoparticle shape-preserving coating to obtain the flexible conductive fiber membrane material of the gold nanoparticle shape-preserving coating.
Preferably, the alkaline aqueous solution of dopamine hydrochloride in step (1) of the present invention is obtained by adding dopamine hydrochloride powder to Tris-HCl buffer solution with pH of 7.0-9.0, and the concentration of Tris-HCl buffer solution is 10 mM.
Preferably, the concentration of the basic aqueous solution of dopamine hydrochloride in step (1) of the present invention is 1 to 4 g/L.
Preferably, the self-polymerization time in the step (1) of the present invention is 12 to 16 hours, and the number of repeated shaking times in the reaction process is 3 to 6.
Preferably, the preparation process of the colloidal solution of gold nanoparticles in step (2) of the present invention is as follows: heating 5.2-34mM sodium citrate solution to 90-100 deg.C to obtain basic solution, slowly dropwise adding chloroauric acid solution to make final chloroauric acid concentration be 2.5-3mM, heating and stirring for 10-15min to obtain colloidal solution.
Preferably, the reaction solution for chemical adsorption in step (2) of the present invention is a chloroauric acid and hydrogen peroxide solution, the concentration of hydrogen peroxide is 7-15mM, the concentration of chloroauric acid solution is 0.3-1mM, the reaction time is 30-90min, and the whole reaction process is performed under the condition of stirring at normal temperature.
The flexible conductive fiber membrane of the gold nanoparticle conformal coating can be used as a gas diffusion electrode and applied to the field of electrocatalysis, such as electrocatalysis double oxidation, glucose and carbon dioxide, and can also be used as a gas diffusion electrode and applied to a sensor for detecting gases such as acetone, methanol, formaldehyde and the like.
Compared with the prior art, the invention has the following characteristics and advantages:
(1) the preparation method of the invention has no limitation on the substrate material, can be suitable for any type of non-planar fiber substrate, does not need plasma treatment, and can regulate the thickness and the shape of the metal through a chemical plating process and a surfactant. The uniform, continuous and smooth conformal gold nano-coating is obtained, and the roughness is low.
(2) The flexible substrate and the metal particle layer in the preparation method are combined through the chemical bond effect, the chemical plating layer is uniform, the gold coating is firm, the gold nanoparticles are not easy to fall off, and the prepared flexible conductive fiber film forms a three-dimensional conductive network and can keep the conductive stability under small deformation.
(3) The preparation method is simple and feasible and has low cost. The method can be carried out in a laboratory without complex equipment, and the used reagent is green and nontoxic and has short reaction time.
(4) The gold nanoparticles are used as the conductive layer, and compared with the traditional conductive material carbon black, silver particles or copper particles, the conductive layer has more excellent conductivity and also has good antibacterial and catalytic properties. Can electrocatalysis a plurality of compounds and detect a plurality of toxic gases, has high selectivity, and has potential application value and application market.
Drawings
FIG. 1 is a process diagram of the preparation of a gold nanoparticle conformal coating flexible conductive fiber membrane of the invention.
FIG. 2 is an SEM image of PVDF from a nanofiber membrane sample in a first embodiment of the invention.
FIG. 3 is an SEM image of a sample PDA-PVDF from the nanofiber membrane in the first embodiment of the invention.
Fig. 4 is an SEM image of AuNPs-PVDF as a nanofiber membrane sample in the first example of the invention.
FIG. 5 is a cross-sectional view of AuNPs-PVDF in the first embodiment of the present invention.
FIG. 6 is a graph of AuNPs-PVDF resistance as a function of the number of times of stretching (2%) in accordance with the first embodiment of the present invention;
FIG. 7 is a curve of AuNPs-PVDF resistance as a function of bending times in a first embodiment of the present invention;
FIG. 8 is the electrocatalytic CO of AuNPs-PVDF in example III of the present invention 2 Electrocatalytic efficiency at different voltages.
FIG. 9 is the electrocatalytic CO of AuNPs-PVDF in example III of the present invention 2 Current density at different voltages.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
As shown in fig. 1, a method for preparing a flexible conductive fiber membrane with a gold nanoparticle conformal coating comprises the following steps:
(1) placing the surface of the fiber membrane in an alkaline aqueous solution of dopamine hydrochloride, carrying out self-polymerization reaction on the surface of the fiber membrane, after reacting for a certain time, ultrasonically cleaning, washing with deionized water, and drying to obtain a polydopamine modified nano fiber membrane; wherein the alkaline aqueous solution of dopamine hydrochloride is obtained by adding dopamine hydrochloride powder into Tris-HCl buffer solution with pH of 7.0-9.0, and the concentration of the Tris-HCl buffer solution is 10 mM. The concentration of the alkaline aqueous solution of dopamine hydrochloride is 1-4 g/L. The self-polymerization time is 12-16h, and the repeated oscillation times in the reaction process are 3-6 times.
(2) Placing the polydopamine modified nanofiber membrane in the step (1) in a colloidal solution of gold nanoparticles, wherein the gold nanoparticles are electrostatically and chemically adsorbed on the surface of the fiber to form a single layer of gold nanoparticles; the reaction solution of the chemical adsorption is chloroauric acid and hydrogen peroxide solution, the concentration of the hydrogen peroxide is 7-16mM, the concentration of the chloroauric acid solution is 0.3-1mM, the reaction time is 30-90min, and the whole reaction process is carried out under the condition of stirring at normal temperature.
The preparation process of the colloidal solution of the gold nanoparticles comprises the following steps: heating 5.2-34mM sodium citrate solution to 90-100 deg.C to obtain basic solution, slowly dropwise adding chloroauric acid solution to make final chloroauric acid concentration be 2.5-3mM, heating and stirring for 10-15min to obtain colloidal solution.
(3) And (3) performing seed growth on the fiber membrane with the single-layer gold nanoparticles formed in the step (2), growing the gold nanoparticles into large nanoparticles on the basis of the original gold seeds, then condensing, and finally forming a continuous, uniform, smooth, complete and compact gold nanoparticle conformal coating to obtain the flexible conductive fiber membrane material with the gold nanoparticle conformal coating.
The first embodiment is as follows:
the preparation process of the flexible conductive PVDF fiber membrane of the whole gold nanoparticle conformal coating is shown in figure 1, and comprises the following specific steps:
(1) preparing a PVDF flexible electrostatic spinning membrane: PVDF powder (Mw 150000) was added to a 1:1 mixture of DMF and acetone and stirred at room temperature for 12 hours to give a 14% wt spinning solution. The PVDF nanofiber membrane is prepared by adopting a traditional electrostatic spinning method. In the spinning process, the voltage applied in spinning, the flow rate of the solution and the electrostatic spinning distance are respectively controlled at 20KV, 1mL/h and 10 cm. And the spinning time is 2h, drying the fiber membrane obtained by spinning in a vacuum drying oven for 12h for later use. The surface topography of the prepared PVDF flexible electrospun membrane is shown in figure 2.
(2) Activation of polydopamine: 0.2g dopamine was weighed into 10mM 100ml Tris-HCl solution at pH 8.5 to give a 2g/L dopamine solution. And (2) placing the fiber obtained in the step (1) in a dopamine solution for carrying out autopolymerization reaction for 12h, repeatedly shaking for 3 times during the autopolymerization reaction, ultrasonically treating the fiber for 30s by using an ultrasonic cleaning machine, removing poly-dopamine agglomerated particles on the surface, washing the fiber by using deionized water, and drying the fiber to obtain the smooth poly-dopamine coated PVDF fiber membrane. The surface morphology of the prepared polydopamine-coated PVDF fiber membrane is shown in figure 3.
(3) Adsorbing gold species: the gold nanoparticle colloidal solution is obtained by heating 6mM sodium citrate solution to boiling to obtain a basic solution, then slowly dropwise adding chloroauric acid solution to enable the final chloroauric acid concentration to be 2.5mM, heating and stirring for 10-15min, and then stopping heating. The prepared polydopamine-coated PVDF fiber membrane is placed in a colloidal solution of gold nanoparticles for 1h under stirring, and is repeated for 4 times, so that a layer of self-assembled monolayer is observed due to the fact that the gold nanoparticles are adsorbed on the surface of the fiber, and the surface of the fiber membrane is very bright.
(4) Seed growth: and (4) placing the fiber membrane obtained in the step (3) into a mixed solution of chloroauric acid and hydrogen peroxide, wherein the concentration of the chloroauric acid in the mixed solution is 0.44mM, and the concentration of the hydrogen peroxide is 15.2 mM. The reaction was carried out for 1h with stirring on a rotor. The surface topography of the obtained gold nanoparticle conformal coating flexible conductive fiber membrane is shown in figure 4. It can be seen that the fiber surface is wrapped with a layer of compact and smooth gold nanoparticle conformal coating. From fig. 5, the cross section of the fiber membrane can be seen, and the gold nanoparticles wrap the PVDF fiber to form a core-shell structure fiber. (PVDF as core, gold nanoparticle conformal coating as shell)
The prepared flexible conductive fiber membrane with the gold nanoparticle conformal coating keeps the flexibility of the original PVDF, and the surface of the membrane is golden yellow.
The resulting nanoparticle conformally coated flexible conductive fiber film was subjected to a tensile and bending cycle test 1000 times to characterize the conductive stability of the flexible conductive film. As seen from fig. 6 and 7, the resistance change of the flexible conductive fiber membrane is small under the fixed deformation of 2%, and the increased resistance in the stretched state is caused by the larger chuck distance or unstable chuck of the fiber membrane, and the resistance value is recovered to the original resistance value in the unstretched state. The resistance of the fiber membrane in the bent state was kept constant, and the rate of change of resistance was 0. Therefore, the flexible conductive fiber film of the nano particle conformal coating prepared under a certain action has stable conductivity and the gold nano particles are firm.
Example two:
(1) polydopamine activation is firstly carried out on a polytetrafluoroethylene fiber membrane (the fiber membrane is prepared by a stretching and sintering process): 0.2g dopamine was weighed into 100ml Tris-HCl solution at pH 8.5,10mM to give a 2g/L dopamine solution. And (3) placing the fiber membrane in a dopamine solution to carry out autopolymerization reaction for 12h, repeatedly shaking for 3 times during the autopolymerization reaction, carrying out ultrasonic treatment for 30s by using an ultrasonic cleaning machine to remove poly-dopamine agglomerated particles on the surface, washing with deionized water, and drying to obtain the smooth poly-dopamine coated PTFE fiber membrane.
(2) Adsorbing gold species: the gold nanoparticle colloidal solution is obtained by heating 6mM sodium citrate solution to boiling to obtain a basic solution, then slowly dropwise adding chloroauric acid solution to enable the final chloroauric acid concentration to be 2.5mM, heating and stirring for 10-15min, and then stopping heating. The prepared polydopamine-coated PTFE fiber membrane is placed in a colloidal solution of gold nanoparticles for 1h under stirring, and is repeated for 4 times, so that a layer of self-assembled monolayer is observed due to the fact that the gold nanoparticles are adsorbed on the surface of the fiber, and the surface of the fiber membrane is very bright.
(3) Seed growth: and (3) placing the fiber membrane obtained in the step into a mixed solution of chloroauric acid and hydrogen peroxide, wherein the concentration of the chloroauric acid in the mixed solution is 0.44mM, and the concentration of the hydrogen peroxide is 15.2 mM. The reaction was carried out for 1h with stirring on a rotor. The surface of the prepared gold nanoparticle conformal coating PTFE conductive fiber membrane is golden yellow.
Example three:
will be as in example 1The fiber membrane is used as a gas diffusion electrode in the field of electrocatalysis of carbon dioxide, titanium-based indium dioxide is used as a counter electrode, an Ag/AgCl electrode is used as a reference electrode, a conductive fiber membrane of a gold nanoparticle conformal coating is used as a working electrode, 0.1M potassium bicarbonate solution is used as electrolyte, and reduction reaction is carried out under the condition of introducing carbon dioxide; the reduction potential range is-0.5-1V, relative to a reversible hydrogen electrode. The carbon dioxide gas flow was at a constant 30 mL-min throughout the test -1 Is passed to KHCO at a rate of 3 In the electrolyte. In testing the faradaic efficiency, the working electrode was held at a constant potential for 30 minutes, potentiometric current data was collected using an electrochemical workstation, and the resulting gas products were detected with a gas chromatograph (3000A μ GC, Agilent). During the test, only CO and H are contained in the gas-phase product 2 Was detected and no product was detected in the liquid phase, the results are shown in fig. 8 and 9. As can be seen from fig. 8: the maximum CO Faraday efficiency of 85% was achieved at-0.75V. FIG. 9 shows that the current density of the catalyst reached 100mA cm at-0.95V -2 Then the faradaic efficiency of the product carbon monoxide can reach 75%. The flexible conductive film is shown to have good electrocatalytic carbon dioxide reduction capability.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A preparation method of a flexible conductive fiber membrane of a gold nanoparticle conformal coating is characterized by comprising the following steps:
(1) placing the surface of the fiber membrane in an alkaline aqueous solution of dopamine hydrochloride, performing a self-polymerization reaction of polydopamine on the surface of the fiber membrane, performing ultrasonic cleaning after the reaction is performed for a certain time, washing with deionized water, and drying to obtain a polydopamine-modified nanofiber membrane;
(2) placing the polydopamine modified nanofiber membrane in the step (1) in a colloidal solution of gold nanoparticles, wherein the gold nanoparticles are electrostatically and chemically adsorbed on the surface of the fiber to form a single layer of gold nanoparticles;
(3) and (3) carrying out seed growth on the fiber membrane of the single-layer gold nanoparticles formed in the step (2), growing the gold nanoparticles into large nanoparticles on the basis of the original gold seeds, then condensing, and finally forming a continuous, uniform, smooth, complete and compact gold nanoparticle shape-preserving coating to obtain the flexible conductive fiber membrane material of the gold nanoparticle shape-preserving coating.
2. The method for preparing a flexible conductive fiber membrane with a conformal coating of gold nanoparticles as claimed in claim 1, wherein the dopamine hydrochloride alkaline aqueous solution in the step (1) is obtained by adding dopamine hydrochloride powder into Tris-HCl buffer solution with pH of 7.0-9.0, and the concentration of the Tris-HCl buffer solution is 10 mM.
3. The method for preparing the gold nanoparticle conformal coating flexible conductive fiber membrane as claimed in claim 1, wherein the concentration of the dopamine hydrochloride alkaline aqueous solution in the step (1) is 1-4 g/L.
4. The method for preparing the flexible conductive fiber membrane with the gold nanoparticle conformal coating according to claim 1, wherein the self-polymerization time in the step (1) is 12-16h, and the repeated oscillation times in the reaction process is 3-6 times.
5. The method for preparing the gold nanoparticle conformal coating flexible conductive fiber membrane according to claim 1, wherein the preparation process of the gold nanoparticle colloidal solution in the step (2) is as follows: heating 5.2-34mM sodium citrate solution to 90-100 deg.C to obtain basic solution, slowly dropwise adding chloroauric acid solution to make final chloroauric acid concentration be 2.5-3mM, heating and stirring for 10-15min to obtain colloidal solution.
6. The method for preparing the flexible conductive fiber film with the gold nanoparticle conformal coating according to claim 1, wherein the reaction solution for chemical adsorption in the step (2) is a chloroauric acid and hydrogen peroxide solution, the concentration of hydrogen peroxide is 7-16mM, the concentration of the chloroauric acid solution is 0.3-1mM, the reaction time is 30-90min, and the whole reaction process is carried out under the condition of stirring at normal temperature.
7. A flexible conductive fiber membrane with a gold nanoparticle conformal coating, characterized by adopting the preparation method of any one of claims 1 to 6.
8. Use of the gold nanoparticle conformally coated flexible conductive fibrous membrane of claim 7 as a gas diffusion electrode.
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| CN104831261A (en) * | 2015-04-03 | 2015-08-12 | 首都师范大学 | Microring electrode and production method thereof |
| CN106930007A (en) * | 2017-02-21 | 2017-07-07 | 东华大学 | Micro nanometer fiber composite membrane with the unidirectional conducting power of moisture and preparation method thereof |
| CN107158962A (en) * | 2017-05-11 | 2017-09-15 | 武汉纺织大学 | A kind of preparation method for the nano fiber porous film for loading high-activity nano metallic particles |
| CN109097978A (en) * | 2018-08-03 | 2018-12-28 | 武汉纺织大学 | Conductive-nano-fibers porous film material of area load nano-metal particle and preparation method thereof |
| CN110508253A (en) * | 2019-06-27 | 2019-11-29 | 福建工程学院 | A kind of preparation method of nanofiber adsorbed film |
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| CN104831261A (en) * | 2015-04-03 | 2015-08-12 | 首都师范大学 | Microring electrode and production method thereof |
| CN106930007A (en) * | 2017-02-21 | 2017-07-07 | 东华大学 | Micro nanometer fiber composite membrane with the unidirectional conducting power of moisture and preparation method thereof |
| CN107158962A (en) * | 2017-05-11 | 2017-09-15 | 武汉纺织大学 | A kind of preparation method for the nano fiber porous film for loading high-activity nano metallic particles |
| CN109097978A (en) * | 2018-08-03 | 2018-12-28 | 武汉纺织大学 | Conductive-nano-fibers porous film material of area load nano-metal particle and preparation method thereof |
| CN110508253A (en) * | 2019-06-27 | 2019-11-29 | 福建工程学院 | A kind of preparation method of nanofiber adsorbed film |
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