CN113155933B - Graphene-molybdenum trioxide-based all-solid-state potassium ion selective electrode and preparation method and application thereof - Google Patents
Graphene-molybdenum trioxide-based all-solid-state potassium ion selective electrode and preparation method and application thereof Download PDFInfo
- Publication number
- CN113155933B CN113155933B CN202110459263.9A CN202110459263A CN113155933B CN 113155933 B CN113155933 B CN 113155933B CN 202110459263 A CN202110459263 A CN 202110459263A CN 113155933 B CN113155933 B CN 113155933B
- Authority
- CN
- China
- Prior art keywords
- potassium ion
- solid
- ion selective
- graphene
- molybdenum trioxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/333—Ion-selective electrodes or membranes
- G01N27/3335—Ion-selective electrodes or membranes the membrane containing at least one organic component
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/02—Oxides; Hydroxides
Abstract
The invention discloses an all-solid-state potassium ion selective electrode based on graphene-molybdenum trioxide and a preparation method and application thereof. According to the invention, the graphene-molybdenum trioxide nano composite material is used for constructing the all-solid-state potassium ion selective electrode, and the high surface area, high conductivity and high hydrophobicity of the reduced graphene oxide are combined with the high redox capacitance of the molybdenum trioxide, so that the transduction layer of the all-solid-state potassium ion selective electrode has an electric double layer, a redox capacitance, strong conductivity and hydrophobicity, the formation of an electrode water layer is effectively prevented, and the all-solid-state potassium ion selective electrode has good response and excellent potential stability to potassium ions.
Description
Technical Field
The invention relates to the technical field of ion selective electrodes, in particular to a graphene-molybdenum trioxide based all-solid-state potassium ion selective electrode and a preparation method and application thereof.
Background
In recent years, with the rise of wearable sensors, research on all-solid-state ion-selective electrode transduction layer materials is also one of the most active subjects in the field of potentiometric sensors. The literature reports that conductive polymers with larger redox capacitance, such as polypyrrole, polythiophene, polyaniline and the like, as the transduction layer can enable the all-solid-state ion selective electrode to have higher capacitance, but light and oxygen are used as the transduction layer 2 And CO 2 And a water layer, etc., easily affect the stability of the potential. The carbon-based nano material such as the carbon nano tube, the graphene, the fullerene and the like can be used as a novel solid transduction layer to be applied to a transduction layer of an all-solid-state ion selective electrode, and has good anti-interference performance, relatively low capacitance and relatively large potential drift. Therefore, the development of new transduction materials is the focus of current all-solid-state ion-selective electrode research.
MoO 3 The material has important application in the fields of water pollution treatment, electrochemistry, photoelectric devices and the like. In addition, the organism and the ecosystem have strong self-regulation and internal stabilization mechanisms on the molybdenum-based material, so that MoO (molybdenum oxide) is obtained 3 Is of great interest to researchers. MoO 3 The pseudocapacitance electrode material has the characteristics of low price, simple synthesis method, high theoretical capacity (2700F/g) and the like, and has great potential. But as a transition metal oxide, moO 3 Has poor conductivity and has the phenomena of dissolution and structural variation in the electrochemical reaction process, so that MoO reported in the literature at present 3 Are all much lower than their theoretical capacity. Graphene has excellent electrochemical properties such as good conductivity, stable structure, strong anti-interference performance and the like, but due to the irreversible agglomeration phenomenon existing in the preparation process, documents report that the mass specific capacitance of the graphene serving as an all-solid-state ion selective electrode is all 100F/g, and the long-term stability of the potential is poor due to the low capacitance.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an all-solid-state potassium ion selective electrode based on graphene-molybdenum trioxide, which has good response to potassium ions and excellent potential stability.
Meanwhile, the invention also provides a preparation method and application of the all-solid-state potassium ion selective electrode.
Specifically, the invention adopts the following technical scheme:
the invention provides an all-solid-state potassium ion selective electrode, which comprises a substrate, a transduction layer arranged on the surface of the substrate, and a potassium ion selective film covering the surface of the transduction layer, wherein the transduction layer comprises a graphene-molybdenum trioxide nanocomposite material.
The all-solid-state potassium ion selective electrode according to the first aspect of the invention has at least the following beneficial effects:
according to the invention, the graphene-molybdenum trioxide nano composite material is used as a transfer layer of the all-solid-state potassium ion selective electrode for the first time, and the high surface area, high conductivity and high hydrophobicity of the reduced graphene oxide are combined with the high redox capacitance of the molybdenum trioxide, so that the problem of potential drift of the graphene material is greatly improved.
In some embodiments of the invention, the graphene-molybdenum trioxide nanocomposite material is loaded in the all-solid-state potassium ion selective electrode in an amount of 0.5 to 2mg/cm 2 。
In some embodiments of the present invention, the graphene-molybdenum trioxide nanocomposite comprises reduced graphene oxide and molybdenum trioxide, wherein the mass ratio of the molybdenum trioxide to the reduced graphene oxide is 1:0.5 to 2, preferably 1:1 to 1.5.
In some embodiments of the invention, the potassium ion-selective membrane is supported in the all-solid-state potassium ion-selective electrode in an amount of 15 to 25mg/cm 2 。
In some embodiments of the present invention, the raw materials for preparing the potassium ion selective membrane include: potassium ion carrier, high molecular polymer, plasticizer and lipophilic macromolecule.
In some embodiments of the present invention, the mass ratio of the ionophore, the high molecular weight polymer, the plasticizer and the lipophilic macromolecule is 1 to 4:50 to 100:100 to 200:1.
in some embodiments of the invention, the potassium ionophore comprises valinomycin.
In some embodiments of the present invention, the high molecular weight polymer includes any one or more of polyvinyl chloride (PVC), polyvinyl acetate, and polymethyl methacrylate.
In some embodiments of the invention, the plasticizer comprises any one or more of diisooctyl sebacate (DOS), 2-nitrophenyloctyl ether, bis (2-ethylhexyl) sebacate.
In some embodiments of the invention, the lipophilic macromolecule comprises any one or more of potassium tetrakis (4-chlorophenyl) borate (KTClPB), potassium tetrakis (pentafluorophenyl) borate (KTPFB), sodium tetraphenylborate.
In some embodiments of the present invention, the substrate may be an electrode substrate commonly used in the art, such as glassy carbon, copper, and the like.
The second aspect of the present invention provides a preparation method of the above all-solid-state potassium ion selective electrode, comprising the following steps:
coating slurry containing a graphene-molybdenum trioxide nano composite material on the surface of a substrate, and drying to form a transfer layer; and preparing a potassium ion selective membrane on the surface of the transfer layer.
In some embodiments of the present invention, the graphene-molybdenum trioxide nanocomposite is prepared by a method comprising: and mixing a molybdenum source with graphene oxide, and carrying out hydrothermal reaction to obtain the graphene-molybdenum trioxide nano composite material.
In some embodiments of the invention, the temperature of the hydrothermal reaction is 150 to 200 ℃; the time of the hydrothermal reaction is 5 to 15 hours.
In some embodiments of the invention, the molybdenum source comprises any one or more of molybdenum trioxide, ammonium molybdate, sodium molybdate, potassium molybdate, or other molybdates.
In some embodiments of the present invention, the mass ratio of molybdenum trioxide to graphene oxide is 1:0.5 to 2, preferably 1:1 to 1.5.
In some embodiments of the present invention, the concentration of the graphene oxide in the reaction system of the hydrothermal reaction is 2 to 5mg/ml.
In some embodiments of the present invention, the raw materials for preparing the slurry comprise a graphene-molybdenum trioxide nanocomposite, a binder, a slurry solvent; the mass ratio of the graphene-molybdenum trioxide nano composite material to the binder is 1: 0.1-0.5, wherein the concentration of the graphene-niobium pentoxide nanocomposite and the binder in the slurry is 10-30 mg/ml. The binder and the slurry solvent may employ binders and solvents commonly used in the art, and the binder includes any one or more of polyvinylidene fluoride resin (PVDF), styrene Butadiene Rubber (SBR), carboxymethyl cellulose (CMC), polyacrylic acid (PAA), polyacrylonitrile (PAN), and polyacrylate, as examples; the dispersing agent comprises any one or more of N-methylpyrrolidone (NMP), ethanol, acetone and ethyl acetate.
In some embodiments of the present invention, the potassium ion selective membrane is prepared by dissolving a potassium ion carrier, a high molecular polymer, a plasticizer and a lipophilic macromolecule in a solvent to obtain a potassium ion selective membrane solution, coating the potassium ion selective membrane solution on the surface of the transduction layer, and drying to form the potassium ion selective membrane. In the potassium ion selective membrane solution, the total concentration of a potassium ion carrier, a high molecular polymer, a plasticizer and a lipophilic macromolecule is 80-150 mg/ml; the solvent can be selected from common solvents, such as Tetrahydrofuran (THF), cyclohexanone, methanol, acetonitrile, etc.
The third aspect of the invention is to provide the above all-solid-state potassium ion selective electrode for detecting K + The use of (1).
A fourth aspect of the invention is to provide a wearable sensor comprising the above all-solid-state potassium ion selective electrode.
Compared with the prior art, the invention has the following beneficial effects:
the invention uses the graphene-molybdenum trioxide nano composite material (rGO-MoO) for the first time 3 ) The method is used for constructing the all-solid-state potassium ion selective electrode, and combines the high surface area, high conductivity and high hydrophobicity of the reduced graphene oxide with the high redox capacitance of the molybdenum trioxide, so that the transduction layer of the all-solid-state potassium ion selective electrode simultaneously has an electric double layer, the redox capacitance, high conductivity and hydrophobicity, and the electrode effectively prevents the formation of an electrode water layer. The experimental result shows that rGO-MoO 3 Facilitating ion-electron charge transfer between the photoconductive layer and the ion-selective membrane. The transduction layer material is simply dripped on the surface of an electrode, so that the electrode shows good electrochemical properties, one part of the electrode has excellent performance similar to that of carbon nano tube and graphene, namely the bulk capacitance of the electrode is derived from the electric double layer capacitance of the electrode, and the other part of the electrode has redox capacitance derived from MoO loaded on the graphene 3 . The response of the solid potassium ion selective electrode to potassium ions is close to the lower limit of detection of Nernst response, no water layer is formed between the transduction layer and the selective membrane interface, and the detection is relatively to that of potassium ionsThe problems of potential drift and poor potential stability are greatly improved by the pure graphene.
Drawings
FIG. 1 is rGO-MoO 3 X-ray diffraction spectrum (a) and scanning electron microscope characterization result (b) of (a)
FIG. 2 is rGO-MoO 3 And cyclic voltammetry test results (a) and charge-discharge test results (b) of rGO;
FIG. 3 is rGO-MoO 3 /K + -ISM and rGO/K + -a potential response (a) and a linear range curve (b) of the ISM;
FIG. 4 is rGO-MoO 3 /K + -ISM and rGO/K + -water layer test results of ISM;
FIG. 5 is rGO-MoO 3 /K + -ISM and rGO/K + Impedance test results of ISM.
Detailed Description
The technical solution of the present invention is further described below with reference to specific examples.
Examples
An all-solid-state potassium ion selective electrode, the preparation method comprises the following steps:
(1) Pretreatment of substrate
Wiping a Glassy Carbon Electrode (GCE) with a diameter of 5mm with alcohol cotton ball, and then sequentially using 0.3 μm and 0.05 μm Al 2 O 3 Polishing the aqueous solution on a chamois leather, then ultrasonically cleaning the electrode by using ultrapure water, ethanol and ultrapure water in sequence, and blowing the electrode dry under the nitrogen flow.
(2) Preparation of graphene-molybdenum trioxide nanocomposite (rGO-MoO) 3 )
11mL of graphene oxide (GO, 12 mg/mL) was mixed with 100mg of MoO 3 Adding 23ml of ultrapure water, carrying out ultrasonic treatment on the mixed solution for 2 hours, pouring the mixed solution into a 50ml reaction kettle after the ultrasonic dispersion is uniform, carrying out hydrothermal reaction at 180 ℃ for 12 hours, cleaning the sample for 3 times by using the ultrapure water after the reaction is finished, and carrying out vacuum freeze drying on the product for 14 hours to obtain the rGO-MoO 3 。
(3) Preparing potassium ion selective membrane solution (K) + -ISM)
A mixture of 82.25mg PVC (32.9 wt%), 164.3mg DOS (65.7 wt%), 2.5mg valinomycin (1 wt%), 1mg KTPFB (0.4 wt%) was dissolved in 2.5ml THF to form 100mg/ml K + Ion-selective membrane solution (K) + -ISM)。
(4) Preparation of all-solid-state potassium ion selective electrode
60mg of rGO-MoO 3 And 7.5mg PVDF (i.e., rGO-MoO) 3 1) with PVDF, and then adding 3mL of NMP solvent to prepare 20mg/mL rGO-MoO 3 Carrying out ultrasonic dispersion on the solution for 4 hours; taking 10 mu L of 20mg/ml rGO-MoO 3 The solution was uniformly applied dropwise to GCE at a loading of 0.2mg (1 mg/cm) 2 ) Then drying the mixture in an oven at 60 ℃ for 4 hours, and then taking out the mixture and cooling the mixture to normal temperature; 40 μ L of K + -ISM drip-coated rGO-MoO 3 Covered GCE (load of 20 mg/cm) 2 ) Drying at room temperature to obtain all-solid potassium ion selective electrode (rGO-MoO) 3 /K + -ISM。
Comparative example
This comparative example differs from example 1 in that no MoO was added during the hydrothermal reaction 3 And obtaining reduced graphene oxide (rGO) after the hydrothermal reaction is finished. The other steps were the same as in example 1.
The all-solid-state ion-selective electrode obtained in this comparative example was designated as rGO/K + -ISM。
Performance testing
Pairing of the above rGO-MoO by a three-electrode system using a Gamry electrochemical workstation and a multi-channel potentiometer 3 /K + -ISM and rGO/K + Electrochemical testing in ISM with rGO-MoO 3 /K + -ISM and rGO/K + -ISM as working electrode, platinum wire and Saturated Calomel Electrode (SCE) as counter and reference electrode, respectively.
(1) Counter-rotating conductive layer material rGO-MoO 3 Structural and compositional characterization was performed as shown in figure 1. X-ray diffraction (XRD) testing showed synthetic rGO-MoO 3 With pure phase MoO 3 The XRD structures of (a) were identical, confirming the composition (fig. 1 a). Simultaneous Scanning Electron Microscope (SEM) display of lamellar MoO 3 Is uniformly attached toOn rGO substrates (fig. 1 b).
(2) Evaluating the transduction layers rGO and rGO-MoO by using a cyclic voltammetry test method (CV) and a charge-discharge test technology 3 The size of the capacitance of (c). The scanning potential window is-0.5V in 1M Na 2 SO 4 CV testing in solution rGO-MoO 3 The capacitance was 10mV/s, and the result is shown in FIG. 2a, where an oxidation-reduction peak derived from MoO was observed 3 The redox reaction of (a) confirms the contribution of the pseudocapacitance thereof; for all solid-state ion-selective electrodes, possessing a large capacitance will contribute to the stability of the potential.
Further obtaining a charge-discharge curve under the charge-discharge current density of 1A/g by a charge-discharge testing technology, as shown in FIG. 2b, calculating rGO-MoO 3 Has a capacitance of 261F/g, and a capacitance of 94F/g, rGO-MoO 3 The capacitance of (2) is improved by nearly 3 times compared with rGO.
(3) Potential response test, all electrodes at 10 -4 Soaking in M KCl solution for 24 hours, 10 -7 The potential was measured after soaking in M KCl solution for 4 hours. Research rGO-MoO 3 /K + -ISM and rGO/K + -ISM all-solid-state ion-selective electrode at 10 -7 ～10 -1 M K + The potential response over the concentration range is shown in FIG. 3. From FIG. 3a it can be seen that both electrodes are paired with K + Exhibits a good Nernst response, the corresponding calibration curve indicates (FIG. 3 b) rGO/K + Response sensitivity and detection limit of ISM 54.5mV/dec and 10 -5.3 M，rGO-MoO 3 /K + ISM electrode response sensitivity and detection limits of 55mV/dec and 10 -5.4 M, performance slightly better than rGO/K + -an ISM electrode.
(4) The presence of a water layer in the electrodes was checked by a water layer test, the results of which are shown in fig. 4. As can be seen from the figure, rGO/K + The potential drift of the ISM is relatively large over the entire test range, and significant water layer formation is observed especially in the second and third sections, with the critical second section potential drift amounting to 2.46 mV. H -1 . And for rGO-MoO 3 /K + ISM, transfer from 0.1M KCl to 0.1M KCl in the second stageIn MNaCl, the potential is relatively stable without obvious rising trend, and the potential drift amount is 0.81 mV.h -1 Relative to rGO/K + ISM, the amount of potential drift decreased by a factor of 3. The water layer test result shows that rGO-MoO 3 The transduction layer serving as the all-solid-state potassium ion selective electrode can effectively prevent the formation of a water layer between the ion selective membrane and the conductive substrate, thereby increasing the stability of the ion selective electrode.
(5) Electrochemical impedance testing
rGO-MoO evaluation using electrochemical impedance testing 3 /K + -ISM and rGO/K + Ion-electron transfer impedance of the two ISM all-solid-state ion-selective electrodes, the results are shown in fig. 5. From the figure, rGO/K can be seen + The charge transfer resistance of the ISM is 0.25 M.OMEGA., and rGO-MoO 3 /K + ISM Charge-to-impedance of 0.12M Ω, ratio rGO/K + The impedance of the ISM electrode is reduced by half, showing faster ion-electron transport capability.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (10)
1. An all-solid-state potassium ion selective electrode, comprising: the composite material comprises a substrate, a transduction layer arranged on the surface of the substrate, and a potassium ion selective membrane covering the surface of the transduction layer, wherein the transduction layer comprises a graphene-molybdenum trioxide nanocomposite material, the graphene-molybdenum trioxide nanocomposite material contains reduced graphene oxide and molybdenum trioxide, and the mass ratio of the molybdenum trioxide to the reduced graphene oxide is 1:0.5 to 2; the graphene-molybdenum trioxide nano composite material is prepared by the following method: and mixing a molybdenum source with graphene oxide, and carrying out hydrothermal reaction to obtain the graphene-molybdenum trioxide nano composite material.
2. According to claim 1The all-solid-state potassium ion selective electrode is characterized in that: the loading capacity of the graphene-molybdenum trioxide nano composite material in the all-solid-state potassium ion selective electrode is 0.5-2 mg/cm 2 。
3. The all-solid potassium ion-selective electrode of claim 2, wherein: the mass ratio of the molybdenum trioxide to the reduced graphene oxide is 1:1 to 1.5.
4. The all-solid potassium ion-selective electrode of claim 1, wherein: the capacity of the potassium ion selective membrane in the all-solid-state potassium ion selective electrode is 15-25 mg/cm 2 。
5. The all-solid potassium ion selective electrode according to any one of claims 1 to 4, wherein: the preparation raw materials of the potassium ion selective membrane comprise: potassium ion carrier, high molecular polymer, plasticizer and lipophilic macromolecule.
6. The method for preparing an all-solid potassium ion selective electrode according to any one of claims 1 to 5, wherein: the method comprises the following steps:
coating the slurry containing the graphene-molybdenum trioxide nanocomposite on the surface of a substrate, and drying to form a transfer layer; and preparing a potassium ion selective membrane on the surface of the transfer layer.
7. The method according to claim 6, wherein: the graphene-molybdenum trioxide nano composite material is prepared by the following method: and mixing a molybdenum source with graphene oxide, and carrying out hydrothermal reaction to obtain the graphene-molybdenum trioxide nano composite material.
8. The method according to claim 7, wherein: the temperature of the hydrothermal reaction is 150-200 ℃.
9. The method of any one of claims 1 to 5The all-solid-state potassium ion selective electrode is used for detecting K + The use of (1).
10. A wearable sensor, characterized by: the wearable sensor comprises the all-solid-state potassium ion selective electrode of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110459263.9A CN113155933B (en) | 2021-04-27 | 2021-04-27 | Graphene-molybdenum trioxide-based all-solid-state potassium ion selective electrode and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110459263.9A CN113155933B (en) | 2021-04-27 | 2021-04-27 | Graphene-molybdenum trioxide-based all-solid-state potassium ion selective electrode and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113155933A CN113155933A (en) | 2021-07-23 |
| CN113155933B true CN113155933B (en) | 2022-11-15 |
Family
ID=76871402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110459263.9A Active CN113155933B (en) | 2021-04-27 | 2021-04-27 | Graphene-molybdenum trioxide-based all-solid-state potassium ion selective electrode and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113155933B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933358A (en) * | 2021-09-30 | 2022-01-14 | 南京农业大学 | All-solid-state potassium ion selective electrode and preparation method thereof |
| CN117069098A (en) * | 2023-07-26 | 2023-11-17 | 中国科学院合肥物质科学研究院 | Material growing along between graphene oxide (001) surface layers and preparation method and application thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198676B (en) * | 2015-05-08 | 2019-03-01 | 中国科学院烟台海岸带研究所 | A kind of solid contact potassium ion-selective electrode and its preparation and application |
| CN106198631B (en) * | 2016-06-27 | 2019-09-24 | 京东方科技集团股份有限公司 | A kind of semiconductor hydrogen gas sensor and preparation method thereof |
| CN110632144B (en) * | 2019-09-16 | 2020-11-10 | 西安交通大学 | All-solid-state ion selective electrode for detecting potassium fertilize and preparation method thereof |
-
2021
- 2021-04-27 CN CN202110459263.9A patent/CN113155933B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113155933A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Highly dispersed conductive polypyrrole hydrogels as sensitive sensor for simultaneous determination of ascorbic acid, dopamine and uric acid | |
| An et al. | Non-covalently functionalizing a graphene framework by anthraquinone for high-rate electrochemical energy storage | |
| Zeng et al. | A solid-contact potassium-selective electrode with MoO2 microspheres as ion-to-electron transducer | |
| Wang et al. | MnO nanoparticle@ mesoporous carbon composites grown on conducting substrates featuring high-performance lithium-ion battery, supercapacitor and sensor | |
| Hung et al. | Ideal asymmetric supercapacitors consisting of polyaniline nanofibers and graphene nanosheets with proper complementary potential windows | |
| CN113155933B (en) | Graphene-molybdenum trioxide-based all-solid-state potassium ion selective electrode and preparation method and application thereof | |
| Cevik et al. | Redox‐mediated poly (2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid)/ammonium molybdate hydrogels for highly effective flexible supercapacitors | |
| Ye et al. | Construction of NiTe/NiSe Composites on Ni Foam for High‐Performance Asymmetric Supercapacitor | |
| Zeng et al. | Stable Pb2+ ion-selective electrodes based on polyaniline-TiO2 solid contacts | |
| Zeng et al. | Improving the stability of Pb2+ ion-selective electrodes by using 3D polyaniline nanowire arrays as the inner solid-contact transducer | |
| Das et al. | High performance electrode material prepared through in-situ polymerization of aniline in the presence of zinc acetate and graphene nanoplatelets for supercapacitor application | |
| Gao et al. | Selective voltammetric determination of Cd (II) by using N, S-codoped porous carbon nanofibers | |
| Gao et al. | Sensitive determination of ATP using a carbon paste electrode modified with a carboxyl functionalized ionic liquid | |
| Etman et al. | Flexible Freestanding MoO3− x–Carbon Nanotubes–Nanocellulose Paper Electrodes for Charge‐Storage Applications | |
| Zou et al. | Boron nitride nanosheet modified electrode: preparation and application to direct electrochemistry of myoglobin | |
| Paczosa-Bator et al. | Application of graphene supporting platinum nanoparticles layer in electrochemical sensors with potentiometric and voltammetric detection | |
| Hamidi et al. | Fabrication of bulk-modified carbon paste electrode containing α-PW12O403− polyanion supported on modified silica gel: Preparation, electrochemistry and electrocatalysis | |
| Zhang et al. | The electrochemical activity of polyaniline: An important issue on its use in electrochemical energy storage devices | |
| Li et al. | All-solid-state polymeric membrane ion-selective electrodes based on NiCo2S4 as a solid contact | |
| Li et al. | Solid-contact polymeric membrane ion-selective electrodes based on electrodeposited NiCo2S4 nanosheet arrays | |
| Bai et al. | Polyaniline-MXene composite electrode with excellent electrochemical properties for all-solid flexible supercapacitors | |
| Brancewicz et al. | Comparison of electrochemical properties of two-component C 60-Pd polymers formed under electrochemical conditions and by chemical synthesis | |
| Wei et al. | Synthesis, electrochemical, and gas sensitivity performance of polyaniline/MoO 3 hybrid materials | |
| CN113155932B (en) | Graphene-niobium pentoxide-based all-solid-state ion selective electrode and preparation method and application thereof | |
| Liu et al. | Potential stability improvement in solid-contact Pb2+ ion-selective electrodes by using polyaniline/montmorillonite composites as the ion-to-electron transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |