CN103063724A - Solid carbonate ion electrode based on conductive polyaniline and preparing method thereof - Google Patents
Solid carbonate ion electrode based on conductive polyaniline and preparing method thereof Download PDFInfo
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- CN103063724A CN103063724A CN2012105381388A CN201210538138A CN103063724A CN 103063724 A CN103063724 A CN 103063724A CN 2012105381388 A CN2012105381388 A CN 2012105381388A CN 201210538138 A CN201210538138 A CN 201210538138A CN 103063724 A CN103063724 A CN 103063724A
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Abstract
The invention discloses a solid carbonate ion electrode based on conductive polyaniline and a preparing method thereof. The solid carbonate ion electrode comprises a metal wire, the conductive polyaniline, soluble conductive polyaniline, carbonate ion sensitive film and a heat shrink tube, wherein a layer of the conductive polyaniline is electroplated on the surface of the lower portion of the metal wire, a layer of the soluble conductive polyaniline is wrapped on the outer surface of the conductive polyaniline, the carbonate ion sensitive film is wrapped on the outer surface of the soluble conductive polyaniline, and the heat shrink tube is wrapped on a portion located in the middle of the metal wire and with a distance greater than 0.5-1cm from the end portion of the carbonate ion sensitive film. The solid carbonate ion electrode based on the conductive polyaniline has the advantages of being high in mechanical strength, large in toughness, high in sensitivity, small in size, quick in detection response, low in detection limit, long in service life and the like. When matched with a solid reference electrode for use, the solid carbonate ion electrode based on the conductive polyaniline is applicable to on line detection and long-term in situ monitoring of carbonate ion content in seawater, aquaculture water, chemical industry water mediums and soil.
Description
Technical field
The present invention relates to the electrochemical detection technology, relate in particular to a kind of solid carbonic acid radical ion electrode based on electrically conductive polyaniline and preparation method thereof.
Background technology
Carbanion content is the important parameter that carries out environmental evaluation in the water body, and for the activity of understanding organism in water, microorganism, and environmental pollution monitoring is significant.The commercial carbanion electrode that is used at present this type of purpose all belongs to liquid membrane electrode, and namely electrode interior need to fill electrolyte solution, i.e. and so-called " salt bridge ", its effect is the response signal that conduction detects between ion sensitive membrane and plain conductor.The major defect of liquid film type electrode comprises: volume more greatly, fragile, easily signal drift occurs, serviceable life is short.
Compare with traditional liquid film type electrode, solid electrode has that volume is little, intensity is high, and the comprehensive advantages such as long service life are suitable for natural water body, especially the long term monitoring of marine environment and online observation.The present invention is directed to this demand and proposed a kind of solid carbonic acid radical ion electrode based on electrically conductive polyaniline and preparation method thereof.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of solid carbonic acid radical ion electrode based on electrically conductive polyaniline and preparation method thereof is provided.
The objective of the invention is to be achieved through the following technical solutions:
Solid carbonic acid radical ion electrode based on electrically conductive polyaniline comprises tinsel, electrically conductive polyaniline, fusible conductive polyaniline, carbanion sensitive membrane, heat-shrink tube, the tinsel lower surface is electroplated one deck electrically conductive polyaniline, outside surface at electrically conductive polyaniline coats one deck fusible conductive polyaniline, outside surface at fusible conductive polyaniline is coated with again the carbanion sensitive membrane, is coated with heat-shrink tube in the middle part of the tinsel and be 0.5～1 centimetre away from carbanion sensitive membrane end more than outside the part.
Described tinsel is Ag, Au, Pt, or the surface is coated with copper wire or the nickel wire of Ag, Au, Pt metal film.Described fusible conductive polyaniline be tinsel in the hydrochloric acid solution of aniline monomer, electroplate to form.Described fusible conductive polyaniline is that mol ratio is the aniline of 1:5～5:1 and the doped hydrochloride multipolymer of 2.5-dimethoxyaniline.
Step based on the preparation method of the solid carbonic acid radical ion electrode of electrically conductive polyaniline is as follows:
1) with length be 5～15 centimetres tinsel, surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 1～2M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) aniline and hydrochloric acid are mixed with the aniline hydrochloride solution of 0.5～1M by the mol ratio of 1:1, perhaps with the aniline hydrochloride chip solid, are dissolved in the deionized water, make the aniline hydrochloride solution of 0.5～1M; Electroplate one deck electrically conductive polyaniline with cyclic voltammetry on top layer wiry by the CHI760D electrochemical workstation; Wherein, scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 0.5～1M, continuous sweep 10 ~ 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) get 5 to 50 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline, with N, dinethylformamide is that solvent is mixed with saturated solution, dip rapidly the N of soluble polyaniline with the electrode that is coated with electrically conductive polyaniline, the dinethylformamide saturated solution is inserted in the crucible that fills sand, dries 4～6 hours in 80～150 ℃ of baking ovens;
4) carbanion carrier and film forming agent, plastifier, kation impedance agent are dissolved in the DMF, are mixed with mixed solution, its composition is respectively by percentage to the quality:
Form A:
Deoxycholic acid derivant 6.9% with two 4-trifluoroacetyl benzoyl groups;
Dotriacontyl ammonio methacrylate 0.7%;
2-nitrobenzene octyl ether 92.4%;
Form B:
The carbonate ion carrier IV solution 6% of Fluka company;
Dotriacontyl ammonio methacrylate 6%;
2-nitrobenzene octyl ether 50%;
PVC 33% ；
Form C:
Poly-(4-trifluoroacetyl group-7-oxo-Isosorbide-5-Nitrae-high hydrogen of oxygen nitrogen is assorted tall and erect) 6.90%;
Dotriacontyl ammonio methacrylate 0.70%;
2-nitrobenzene octyl ether 92.40%;
5) dip mixed solution 1～3 time with the surperficial electrode that is coated with soluble polyaniline, be inserted on the polyfoam, placed the vacuum dryer vacuum drying 24 hours, until solvent obtains the carbanion sensitive membrane after volatilizing fully;
6) heat-shrink tube is coated on tinsel middle part and be part 0.5～1 centimetre away from carbanion sensitive membrane end more than.
Exploring electrode volume of the present invention is little, highly sensitive, and probe response is fast, has very high physical strength and toughness, has good serviceability under condition of high voltage.Therefore be applicable to the carbanion content in seawater, breeding water and chemistry, the chemical industry aqueous medium is surveyed and long-term in-situ monitoring online, compare with traditional sampling analysis, both alleviated working strength, avoided the secondary pollution in the sampling process, improved again the real-time of data, reliability.
Description of drawings:
Fig. 1 is based on the structural representation of the solid carbonic acid radical ion electrode of electrically conductive polyaniline;
Among the figure: tinsel 1, electrically conductive polyaniline 2, fusible conductive polyaniline 3, carbanion sensitive membrane 4, heat-shrink tube 5.
Embodiment
Solid carbonic acid radical ion electrode based on electrically conductive polyaniline comprises tinsel 1, electrically conductive polyaniline 2, fusible conductive polyaniline 3, carbanion sensitive membrane 4, heat-shrink tube 5, tinsel 1 lower surface is electroplated one deck electrically conductive polyaniline 2, outside surface at electrically conductive polyaniline 2 coats one deck fusible conductive polyaniline 3, outside surface at fusible conductive polyaniline 3 is coated with again carbanion sensitive membrane 4, tinsel 1 middle part and be 0.5～1 centimetre away from carbanion sensitive membrane 4 ends more than the part outside be coated with heat-shrink tube 5.
Described tinsel 1 is Ag, Au, Pt, and its effect is that electrode surface is passed to detection circuit by the response signal that the carbanion carrier forms.The recommendation noble metal, the undesired signal that can avoid the dissolved constituent in tinsel self and the water body to form because of electrochemical reaction.Be to reduce cost, can use the surface to be coated with the copper wire, nickel wire of Ag, Au, Pt as electrode base material.
Described electrically conductive polyaniline 2 be tinsel 1 in the hydrochloric acid solution of aniline monomer, electroplate to form.Conductive polyaniline film 2 has good electric conductivity, and there is not obvious interlayer barrier in the electric current conduction between the two; In addition, conductive polyaniline film has changed surface nature wiry, has increased the affinity between the organic coating layer of it and follow-up formation.
Described fusible conductive polyaniline 3 is that mol ratio is the aniline of 1:5～5:1 and the doped hydrochloride multipolymer of 2.5-dimethoxyaniline.The doped hydrochloride multipolymer of aniline and 2,5-dimethoxyaniline can use commercial product, also can oneself be synthetic, and its chemical synthesis process is consistent with polyaniline, is the mixture replacing aniline of aniline and 2,5-dimethoxyaniline being pressed 5:1 to 1:5.
Use the doped hydrochloride multipolymer of aniline and 2,5-dimethoxyaniline to have triple effects:
It has electric conductivity as electrically conductive polyaniline;
The plated conductive polyaniline composition of it and internal layer approaches, and chemical affinity is strong;
It and outermost layer carbanion carrier can both be dissolved in DMF, thereby can be partly dissolved in the process of carbon coated acid group radical ion carrier, make carbanion sensitive membrane and soluble polyaniline close contact, conductive impairment between eliminating layer.
Step based on the preparation method of the solid carbonic acid radical ion electrode of electrically conductive polyaniline is as follows:
1) with length be 5～15 centimetres tinsel 1, surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 1～2M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) aniline and hydrochloric acid are mixed with the aniline hydrochloride solution of 0.5～1M by the mol ratio of 1:1, perhaps with the aniline hydrochloride chip solid, are dissolved in the deionized water, make the aniline hydrochloride solution of 0.5～1M; Electroplate one deck electrically conductive polyaniline 2 with cyclic voltammetry on the top layer of tinsel 1 by the CHI760D electrochemical workstation; Wherein, scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel 1 is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 0.5～1M, continuous sweep 10 ~ 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) get 5 to 50 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline, with N, dinethylformamide is that solvent is mixed with saturated solution, dip rapidly the N of soluble polyaniline with the electrode that is coated with electrically conductive polyaniline 2, the dinethylformamide saturated solution is inserted in the crucible that fills sand, dries 4～6 hours in 80～150 ℃ of baking ovens;
4) carbanion carrier and film forming agent, plastifier, kation impedance agent are dissolved in the DMF, are mixed with mixed solution, its composition is respectively by percentage to the quality:
Form A:
Deoxycholic acid derivant 6.9% with two 4-trifluoroacetyl benzoyl groups;
Dotriacontyl ammonio methacrylate 0.7%;
2-nitrobenzene octyl ether 92.4%;
Form B:
The carbonate ion carrier IV solution 6% of Fluka company;
Dotriacontyl ammonio methacrylate 6%;
2-nitrobenzene octyl ether 50%;
PVC 33% ；
Form C:
Poly-(4-trifluoroacetyl group-7-oxo-Isosorbide-5-Nitrae-high hydrogen of oxygen nitrogen is assorted tall and erect) 6.90%;
Dotriacontyl ammonio methacrylate 0.70%;
2-nitrobenzene octyl ether 92.40%;
5) dip mixed solution 1～3 time with the surperficial electrode that is coated with soluble polyaniline 3, be inserted on the polyfoam, placed the vacuum dryer vacuum drying 24 hours, until solvent obtains carbanion sensitive membrane 4 after volatilizing fully; Vacuum drying under the recommendation normal temperature avoids using hyperthermia drying, is in order better to protect the activity of carbanion sensitive membrane;
6) heat-shrink tube 5 is coated on tinsel 1 middle part and be part 0.5～1 centimetre away from carbanion sensitive membrane 4 ends more than.
1) with length be 10 centimetres tinsel 1, surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 1M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) take by weighing 1.9439g commodity aniline hydrochloride chip solid, be dissolved in the 15ml deionized water, make the aniline hydrochloride solution of 1M; Electroplate one deck electrically conductive polyaniline 2 with cyclic voltammetry on the top layer of tinsel 1 by the CHI760D electrochemical workstation.
Experiment parameter is: scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel 1 is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 1M, continuous sweep 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) take by weighing 35 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline (mol ratio of the two is 5:1), be dissolved in and be mixed with saturated solution among the 10mlDMF, the electrode that is coated with electrically conductive polyaniline 2 with the surface dips rapidly the N of soluble polyaniline, dinethylformamide (DMF) saturated solution, be inserted in the crucible that fills sand, oven dry is 4 hours in 150 ℃ of baking ovens;
4) carbanion carrier and attached component thereof are dissolved among the DMF according to forming A, are mixed with mixed solution, its composition A is respectively by percentage to the quality:
With the deoxycholic acid derivant (Deoxycholic acid derivative with two 4-trifluoroacetylbenzoyl groups) 6.9% of two 4-trifluoroacetyl benzoyl groups,
Dotriacontyl ammonio methacrylate (Tridodecylmethyl ammonium chloride) 0.7%,
2-nitrobenzene octyl ether (2-Nitro phenyl octyl ether) 92.4%;
5) dip fast mixed solution with the surperficial electrode that is coated with soluble polyaniline 3, repeat once, be inserted on the polyfoam, placed the vacuum dryer vacuum drying 24 hours, until solvent obtains carbanion sensitive membrane 4 after volatilizing fully;
6) heat-shrink tube 5 is coated on tinsel 1 middle part and be part 0.5 centimetre away from carbanion sensitive membrane 4 ends more than.
1) with length be 8 centimetres tinsel 1, surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 2M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) take by weighing respectively 10.1388g hydrochloric acid, 9.313g aniline, in the 100ml volumetric flask, add water to the solution that scale namely gets hydrochloric acid: aniline=1M:1M; Electroplate one deck electrically conductive polyaniline 2 with cyclic voltammetry on the top layer of tinsel 1 by the CHI760D electrochemical workstation.
Experiment parameter is: scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel 1 is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 1M, continuous sweep 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) take by weighing 35 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline (mol ratio of the two is 1:1), be dissolved in and be mixed with saturated solution among the 10mlDMF, the electrode that is coated with electrically conductive polyaniline 2 with the surface dips rapidly the DMF saturated solution of soluble polyaniline, be inserted in the crucible that fills sand, oven dry is 4 hours in 150 ℃ of baking ovens;
4) carbanion carrier and attached component thereof are dissolved among the DMF according to forming A, are mixed with mixed solution, its composition A is respectively by percentage to the quality:
With the deoxycholic acid derivant (Deoxycholic acid derivative with two 4-trifluoroacetylbenzoyl groups) 6.9% of two 4-trifluoroacetyl benzoyl groups,
Dotriacontyl ammonio methacrylate (Tridodecylmethyl ammonium chloride) 0.7%,
2-nitrobenzene octyl ether (2-Nitro phenyl octyl ether) 92.4%;
5) dip fast mixed solution with the surperficial electrode that is coated with soluble polyaniline 3, repeat once, be inserted on the polyfoam, placed the vacuum dryer vacuum drying 24 hours, until solvent obtains carbanion sensitive membrane 4 after volatilizing fully;
6) heat-shrink tube 5 is coated on tinsel 1 middle part and be part 1 centimetre away from carbanion sensitive membrane 4 ends more than.
1) with length be 10 centimetres tinsel 1, surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 1M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) take by weighing 0.9720g commodity aniline hydrochloride chip solid, be dissolved in the 15ml deionized water, make the aniline hydrochloride solution of 0.5M; Electroplate one deck electrically conductive polyaniline 2 with cyclic voltammetry on the top layer of tinsel 1 by the CHI760D electrochemical workstation;
Experiment parameter is: scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel 1 is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 1M, continuous sweep 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) take by weighing 35 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline (mol ratio of the two is 5:1), be dissolved in and be mixed with saturated solution among the 10mlDMF, the electrode that is coated with electrically conductive polyaniline 2 with the surface dips rapidly the DMF saturated solution of soluble polyaniline, be inserted in the crucible that fills sand, oven dry is 4 hours in 150 ℃ of baking ovens;
4) carbanion carrier and attached component thereof are dissolved among the DMF according to forming B, are mixed with mixed solution, its composition B is respectively by percentage to the quality:
The carbonate ion carrier IV solution of Fluka company (Carbonate ionophore IV solution) 6%,
Dotriacontyl ammonio methacrylate (Tridodecylmethyl ammonium chloride) 6%,
2-nitrobenzene octyl ether (2-Nitro phenyl octyl ether) 50%,
PVC（Poly(vinyl chloride) high molecular weight）33% ；
5) dip fast mixed solution with the surperficial electrode that is coated with soluble polyaniline 3, repeat 2 times, be inserted on the polyfoam, placed the vacuum dryer vacuum drying 24 hours, until solvent obtains carbanion sensitive membrane 4 after volatilizing fully;
6) heat-shrink tube 5 is coated on tinsel 1 middle part and be part 0.5 centimetre away from carbanion sensitive membrane 4 ends more than.
1) with length be 15 centimetres tinsel 1, surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 1M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) take by weighing 1.9439g commodity aniline hydrochloride chip solid, be dissolved in the 15ml deionized water, make the aniline hydrochloride solution of 1M; Electroplate one deck electrically conductive polyaniline 2 with cyclic voltammetry on the top layer of tinsel 1 by the CHI760D electrochemical workstation;
Experiment parameter is: scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel 1 is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 1M, continuous sweep 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) take by weighing 35 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline (mol ratio of the two is 1:5), be dissolved in and be mixed with saturated solution among the 10mlDMF, the electrode that is coated with electrically conductive polyaniline 2 with the surface dips rapidly the DMF saturated solution of soluble polyaniline, be inserted in the crucible that fills sand, oven dry is 4 hours in 150 ℃ of baking ovens;
4) carbanion carrier and attached component thereof are dissolved among the DMF according to forming C, are mixed with mixed solution, its composition C is respectively by percentage to the quality:
Poly-(4-trifluoroacetyl group-7-oxo-Isosorbide-5-Nitrae-high hydrogen of oxygen nitrogen is assorted tall and erect) 6.90%,
Dotriacontyl ammonio methacrylate (Tridodecylmethyl ammonium chloride) 0.70%,
2-nitrobenzene octyl ether (2-Nitro phenyl octyl ether) 92.40%;
5) dip fast mixed solution with the surperficial electrode that is coated with soluble polyaniline 3, repeat once, be inserted on the polyfoam, placed the vacuum dryer vacuum drying 24 hours, until solvent obtains carbanion sensitive membrane 4 after volatilizing fully;
6) heat-shrink tube 5 is coated on tinsel 1 middle part and be part 0.5 centimetre away from carbanion sensitive membrane 4 ends more than.
The solid carbonic acid radical ion is selected the demarcation of electrode,
The used solvent of preparation carbanion standard solution is homemade simulated seawater, and filling a prescription is: dipotassium hydrogen phosphate 5.59g, and potassium dihydrogen phosphate 0.41g, sodium chloride 35 grams add and boil and cooled deionized water to 1000 gram of secluding air.Obtain in the following manner 5 measuring points:
1) gets the sodium bicarbonate of 40 ℃ of oven dry of 0.84 gram, add above-mentioned solvent to 100 gram.Obtain 10
-1Mole titer A;
2) get 10 gram titer A, solubilizer to 100 gram obtains 10
-2Mole titer B;
3) get 10 gram titer B, solubilizer to 100 gram obtains 10
-3Mole titer C;
4) get 10 gram titer C, solubilizer to 100 gram obtains 10
-4Mole titer D;
5) get 100 gram solvents, blast air, obtain the measuring point that concentration is 0.008746 molL-1;
6) get 100 gram solvents, blast CO2, obtain the measuring point that concentration is 0.035 molL-1;
7) get 100 gram solvents, blast nitrogen, obtain concentration and be 0 measuring point
Select electrode as working electrode take the self-control carbanion, commodity Ag/AgCl electrode is contrast electrode, respectively working electrode and contrast electrode is connected to the CHI760D electrochemical workstation, the response electric signal from high concentration toward the low concentration sequentially determining.1) ~ 4) number and 5) ~ 7) number respectively according to response signal intensity and concentration relationship mapping, the linear relationship slope of two lines is between 28 ~ 30, meeting can Si Tedinglv.
Claims (5)
1. solid carbonic acid radical ion electrode based on electrically conductive polyaniline, it is characterized in that comprising tinsel (1), electrically conductive polyaniline (2), fusible conductive polyaniline (3), carbanion sensitive membrane (4), heat-shrink tube (5), tinsel (1) lower surface is electroplated one deck electrically conductive polyaniline (2), outside surface at electrically conductive polyaniline (2) coats one deck fusible conductive polyaniline (3), outside surface at fusible conductive polyaniline (3) is coated with again carbanion sensitive membrane (4), is coated with heat-shrink tube (5) in the middle part of the tinsel (1) and be 0.5～1 centimetre away from carbanion sensitive membrane (4) end more than outside the part.
2. a kind of solid carbonic acid radical ion electrode based on electrically conductive polyaniline according to claim 1 is characterized in that described tinsel (1) is Ag, Au, Pt, or the surface is coated with copper wire or the nickel wire of Ag, Au, Pt metal film.
3. a kind of solid carbonic acid radical ion electrode based on electrically conductive polyaniline according to claim 1 is characterized in that, described electrically conductive polyaniline (2) be tinsel (1) in the hydrochloric acid solution of aniline monomer, electroplate to form.
4. a kind of solid carbonic acid radical ion electrode based on electrically conductive polyaniline according to claim 1 is characterized in that, described fusible conductive polyaniline (3) is that mol ratio is the aniline of 1:5～5:1 and the doped hydrochloride multipolymer of 2.5-dimethoxyaniline.
5. preparation method based on the solid carbonic acid radical ion electrode of electrically conductive polyaniline is characterized in that its step is as follows:
1) with length be 5～15 centimetres tinsel (1), surface and oil contaminant is removed in first ultrasonic cleaning in acetone soln, and oxide is removed in ultrasonic cleaning in 1～2M watery hydrochloric acid again, uses after the deionized water ultrasonic cleaning dry again;
2) aniline and hydrochloric acid are mixed with the aniline hydrochloride solution of 0.5～1M by the mol ratio of 1:1, perhaps with the aniline hydrochloride chip solid, are dissolved in the deionized water, make the aniline hydrochloride solution of 0.5～1M; Electroplate one deck electrically conductive polyaniline (2) with cyclic voltammetry on the top layer of tinsel (1) by the CHI760D electrochemical workstation; Wherein, scanning current potential 0-0.45V, sweep velocity 50mV/s, sampling interval 1mV, sensitivity 10
-4A/V; Tinsel (1) is done anode, and auxiliary electrode is the Pt electrode, and contrast electrode is commercial Ag/AgCl electrode; Three electrodes are inserted simultaneously in the aniline hydrochloride solution of 0.5～1M, continuous sweep 10 ~ 20 circulations, with anhydrous alcohol drip washing electrode, stand-by after the alcohol volatilization after plating is finished;
3) get 5 to 50 milligrams of aniline and 2, the doped hydrochloride multipolymer of 5-dimethoxyaniline, with N, dinethylformamide is that solvent is mixed with saturated solution, dip rapidly the N of soluble polyaniline with the electrode that is coated with electrically conductive polyaniline (2), the dinethylformamide saturated solution is inserted in the crucible that fills sand, dries 4～6 hours in 80～150 ℃ of baking ovens;
4) carbanion carrier and film forming agent, plastifier, kation impedance agent are dissolved in the DMF, are mixed with mixed solution, its composition is respectively by percentage to the quality:
Form A:
Deoxycholic acid derivant 6.9% with two 4-trifluoroacetyl benzoyl groups;
Dotriacontyl ammonio methacrylate 0.7%;
2-nitrobenzene octyl ether 92.4%;
Form B:
The carbonate ion carrier IV solution 6% of Fluka company;
Dotriacontyl ammonio methacrylate 6%;
2-nitrobenzene octyl ether 50%;
PVC 33% ；
Form C:
Poly-(4-trifluoroacetyl group-7-oxo-Isosorbide-5-Nitrae-high hydrogen of oxygen nitrogen is assorted tall and erect) 6.90%;
Dotriacontyl ammonio methacrylate 0.70%;
2-nitrobenzene octyl ether 92.40%;
5) electrode that is coated with soluble polyaniline (3) with the surface dips mixed solution 1～3 time, is inserted on the polyfoam, places the vacuum dryer vacuum drying 24 hours, until solvent obtains carbanion sensitive membrane (4) after volatilizing fully;
6) heat-shrink tube (5) is coated on tinsel (1) middle part and be part 0.5～1 centimetre away from carbanion sensitive membrane (4) end more than.
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| CN106018525A (en) * | 2016-05-20 | 2016-10-12 | 浙江刚竹网络科技有限公司 | High sensitivity lead ion electrode based on polypyrrole and preparation method thereof |
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| CN1667405A (en) * | 2005-01-10 | 2005-09-14 | 厦门大学 | Methanol electro-oxidizing-catalyzing electrode, preparing process and application thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808780A (en) * | 2013-03-28 | 2014-05-21 | 浙江大学 | Solid carbonate electrode based on barium carbonate and strontium carbonate and preparation method of solid carbonate electrode |
| CN103808780B (en) * | 2013-03-28 | 2015-11-04 | 浙江大学 | Based on the solid carbon acid group electrode and preparation method thereof of barium carbonate, strontium carbonate |
| CN105606678A (en) * | 2015-09-08 | 2016-05-25 | 浙江大学 | Doped polyaniline based solid acid radical electrode and preparation method thereof |
| CN106018524A (en) * | 2016-05-20 | 2016-10-12 | 浙江刚竹网络科技有限公司 | High-sensitivity nitrite ion electrode based on poly(3,4-ethylenedioxythiophene) and preparation method thereof |
| CN106018525A (en) * | 2016-05-20 | 2016-10-12 | 浙江刚竹网络科技有限公司 | High sensitivity lead ion electrode based on polypyrrole and preparation method thereof |
| CN106053582A (en) * | 2016-05-20 | 2016-10-26 | 浙江刚竹网络科技有限公司 | Polyaniline based mercury ion electrode with high sensitivity and preparation method thereof |
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