118 results about "Redox Activity" patented technology

The invention belongs to the field of perovskite solar cells, and particularly relates to application of a bulk phase and interface synergistic passivator in a perovskite solar cell. The invention provides a bulk phase / interface synergistic passivation innovative strategy, molecules with a tricyclic sulfur-nitrogen heterocyclic ring structure are introduced as a synergistic passivator, and defect global repair of each functional layer of a device is realized. The molecular design of the structural derivative taking phenothiazine as the core has the following advantages: skeleton characteristics: a conjugated tricyclic system forms an electron transport network through pi-pi stacking, endows molecules with excellent electron delocalization ability, and effectively regulates and controls carrier kinetics; the thioether group is used for dynamically repairing an ion migration channel through oxidation-reduction activity and inhibiting formation of deep-energy-level defects; and the secondary amine group is used as a hydrogen bond donor for anchoring uncoordinated halide ions and synchronously passivating surface and grain boundary defects.

The invention discloses a covalent organic framework with oxidation-reduction activity and a bionic nano-channel structure as well as a preparation method and application of the covalent organic framework, and belongs to the technical field of environmental protection. According to the preparation method, 2, 4-dihydroxybenzene-1, 3, 5-tricarboxaldehyde and 2, 5-bis (allyloxy) terephthaloyl hydrazine are taken as raw materials, a two-dimensional covalent organic framework with oxidation-reduction activity is synthesized, and then a sulfonic acid group with negative charges is covalently grafted, so that a functional material with a bionic nano-channel structure is formed. The material has regular porous channels and rich functional sites, the porous channels provide efficient mass transfer paths and adsorption spaces for uranyl ions, and the functional sites realize specific recognition of the uranyl ions through oxidation-reduction reaction and electrostatic interaction, so that the material shows synergistic advantages of strong selectivity, high adsorption capacity and rapid adsorption kinetics on uranium. The method is simple and low in cost, and the prepared material is clear in structure, good in hydrophilicity, capable of efficiently adsorbing uranyl ions and good in application prospect.

The present application relates to the technical field of electrochemical sensor, and especially to a sludge-based biochar suspension for electrode modification, a preparation method and application thereof, wherein the sludge-based biochar is prepared by taking brewery residual sludge as raw material, and then the ash is removed by HF solution and oxidized by nitric acid solution, so that the sludge-based biochar generates more pores, the specific surface area is improved, and meanwhile, the surface has more functional groups, such as nitro group and carboxyl group, which is beneficial to electrodeposition of CoS with high conductivity and high redox activity on the surface.

The invention relates to the technical field of photocatalysts, and particularly discloses modified bismuth molybdate as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a homogeneous solution A containing a bismuth source; sO4 < 2-> and a molybdenum source are dispersed in a solvent according to the molar mass ratio of 1: 1-1: 10, and a homogeneous solution B is obtained; uniformly mixing the homogeneous solution A and the homogeneous solution B to obtain a solution C; and carrying out a hydrothermal method on the solution C to obtain the modified bismuth molybdate. By doping SO4 < 2-> into bismuth molybdate, the physicochemical properties of bismuth molybdate are optimized from multiple aspects, the photocatalytic activity of bismuth molybdate is improved, and excellent performance is achieved in the aspect of photocatalytic degradation of tetracycline in actual wastewater. The prepared modified bismuth molybdate not only can efficiently utilize visible light, but also is rich in oxygen vacancies on the surface, has high specific surface area, strong adsorbability and efficient photon-generated carrier separation efficiency, shows strong redox activity, and remarkably promotes pollutant degradation.

The invention relates to the technical field of microelectronic devices, in particular to a single-molecule memristor-rectifier device based on supramolecular assembly and a preparation method thereof. According to the preparation method, the guest molecule B is covalently connected with the tail end of the graphene electrode pair, so that stable and tight interface bonding between the supramolecular functional molecule and the electrode can be ensured; and then soaking the graphene electrode pair connected with the guest molecule B in a solution containing the host molecule A and the guest molecule C to form a supramolecular functional molecule between the graphene electrode pair. The guest molecule C in the supramolecular functional molecule has intrinsic oxidation-reduction activity, and the molecular structure of the guest molecule C can generate a reversible electron gain and loss process, so that controllable and reversible adjustment of charge distribution in the molecule is realized. Under the action of an electric field, through the reversible oxidation-reduction reaction of the guest molecule C, significant changes of intramolecular charge distribution and electron transmission characteristics are triggered, and finally reliable switching of high and low resistance states of the device is achieved.

The invention belongs to the technical field of precious metal recovery, and provides a method for efficiently recovering platinum group metal in a catalyst through photocatalysis and application thereof, and the method comprises the following steps: mixing a waste catalyst crushed material and metal powder, carrying out mechanochemical treatment, adding an acid solution, and reacting to obtain a modified waste catalyst; the modified waste catalyst and the leaching solution are mixed to obtain suspension liquid, then the suspension liquid is irradiated through ultraviolet-visible light for a photocatalytic reaction, filtering is conducted, and platinum group metal leaching liquid and leaching residues are obtained; and regulating the pH value of the platinum group metal leachate, adding an oxidizing agent, and extracting and separating the transition metal chloride by using an extracting agent to obtain the platinum group metal solution. According to the method, the platinum group metal particles are regulated and controlled while mechanical and chemical treatment activation is adopted, so that the platinum group metal particles generate the plasma resonance effect, strong redox active species generated by a photocatalyst under the illumination condition are converted into soluble compounds through complexation, and efficient leaching and recycling are achieved.

The invention relates to the field of sulfide solid-state batteries, and discloses a preparation method of a mixed conducting layer coated sulfide electrolyte and application of the mixed conducting layer coated sulfide electrolyte to an all-solid-state lithium-sulfur battery positive electrode. And carrying out ball milling on the obtained mixed material by using a planetary ball mill according to specific parameters, so as to obtain the sulfide electrolyte with the mixed conductive coating layer. The mixed conductive coating layer can be used as a solid-state lithium-sulfur battery positive electrode conductive additive; contact between the carbon material and the internal electrolyte can be limited, and decomposition of the internal electrolyte is prevented; the Young modulus is lower, so that all the components are in better contact; when being applied to a composite positive electrode of a solid-state lithium-sulfur battery, the composite positive electrode can generate oxidation-reduction activity in a battery charging and discharging process, so that the capacity of the battery is improved; on the basis of the four points, the composite positive electrode electrolyte is favorably inhibited from being decomposed, the interface contact of the solid-state battery is favorably improved, and the capacity of the battery is favorably improved.

The application discloses a kind of detection pesticide water amitraz integrated organic photoelectrochemical transistor sensor construction method.The application is integrated on the same fluorine-doped tin oxide conductive glass chip by laser etching technology to have the gate, source, drain three electrodes of organic photoelectrochemical transistor.In order to improve the activity and stability of grating material, the method of encapsulating Pd NPs in Cu-MOF and pyrolyzing is adopted, and Pd NPs / p-Cu-MOF is formed.Pyrolysis Cu-MOF with three-dimensional MOF structure as active carrier can load more Pd NPs, and the redox active copper metal elements contained therein will cause electron transfer between carrier and Pd NPs, so as to adjust the electronic state of metal active site and improve its catalytic performance.Schottky junction is formed between Pd NPs and p-Cu-MOF, which promotes the separation of electrons and holes.Pd NPs / p-Cu-MOF is used as photoactive gate material, and amino amitraz aptamer with carboxyl on the material is used as recognition element, so as to realize the OPECT sensing detection of ICP.

The present disclosure provides a molecularly imprinted polymer (MIP) selective for a perfluoroalkyl and polyfluoroalkyl substance (PFAS), an article comprising such an MIP, methods of making the same, and methods of using the same. The MIP comprises moieties of a monomer having a first portion for an electrically conductive polymer chain and a second portion comprising a N-oxyl side group for redox activity. The MIP is obtained through polymerization of the monomer in the presence of the specific PFAS as a template. The MIP is configured to be selective to the PFAS for a measurement of a concentration of the PFAS.

The invention discloses application of ferrocenyl conjugated microporous polymers Fc-CMPs in a composite solid propellant and the composite solid propellant, the ferrocenyl conjugated microporous polymers Fc-CMPs are porous organic polymers which take ferrocenyl groups as conjugated functional units and are connected through covalent acetylenic bonds, and the ferrocenyl conjugated microporous polymers Fc-CMPs have excellent thermal stability and permanent porosity, and can be used for preparing the composite solid propellant. The material is solid powder, is insoluble in a traditional organic solvent and does not migrate, and a ferrocene unit serves as a constituent part of a polymer framework and an oxidation-reduction active site and is dispersed in a two-dimensional conjugated network structure of a composite solid propellant. When being used as a burning rate catalyst to be applied to AP decomposition, the ferrocene burning rate catalyst can obviously reduce the high-temperature decomposition peak temperature of AP, and solves the migration problem of a traditional ferrocene burning rate catalyst in a composite solid propellant system. The Fc-CMPs are applied to an AP decomposition catalysis scene for the first time, and a new direction is provided for development of a composite solid propellant burning rate catalyst.

The microorganism strain Pediococcus acidilactici TAK 589 CoccobEst is a new antimicrobial and antioxidant probiotic, CoccobEst inhibits the growth of the enteropathogens L. monocytogenes, E. coli, S. enteritidis, S. typhimurium, S. sonnei, S. aureus, E. faecalis and C. sakazakii, but does not inhibit lactobacilli of natural intestinal microbiota. The strain's antimicrobial properties are enhanced by periplasmic peptidoglycan hydrolases with proteolytic activity. CoccobEst is used as a zootechnieai feed additive to prevent bacterial infections in the gastrointestinal tract of farm animals and pets and to prevent and reduce diarrhea. CoccobEst has highly active antioxidant defense system, increasing the redox activity of glutathione and reducing oxidative stress in cells. Therefore, CoccobEst is used as a food supplement or functional food for humans to prevent bacterial infections of the gastrointestinal tract and to prevent and reduce oxidative stress. In addition, CoccobEst is used as a starter culture in fermentation of vegetables.

Compositions and methods for three-dimensional (3D) printing of a variety of products are described. The composition comprises (i) a photoredox component comprising an electron donor and a redox shuttle, and (ii) one or more photoinert materials. The disclosed compositions and methods related to 3D nanoprinting techniques mainly utilize physical processes of phase separation induced by molecular aggregation from light energy input. The driving force of molecular aggregation comes from a photoredox active component in the vicinity of one or more photoinert materials (e.g., molecules to undergo molecular aggregation). Preferably, the collision between the photoredox active component and one or more photoinert materials provides a general phase separation process. The photoredox active component acts as an active bath, allowing any submerged inert reagent to inherit the active properties of the photosensitizer.

The invention discloses a dual-mode detection kit for highly sensitive detection of ERalpha based on HRP-streptavidin. The dual-mode detection kit comprises the following raw materials: a glassy carbon electrode, 1-AP-CNHs, AuNPs, Sh-Apt, MCH, Bio-Ab, and HRP-streptavidin. The invention successfully constructs an electrochemical detection kit for detecting ERalpha with high sensitivity on the basis of the 1-AP-CNHs / AuNPs composite material. According to the invention, due to the redox activity of HRP-streptavidin, the HRP-streptavidin and H2O2 are subjected to redox reaction to generate a current signal; in addition, hydrogen peroxide can be catalyzed to generate. OH free radicals, and the free radicals can oxidize TMB to generate blue products, so that colorimetric reaction is initiated, and ERalpha can be detected more accurately. The electrochemical-colorimetric dual mode of the 3D 1-AP-CNHs / AuNPs composite material and the HRP-streptavidin for high-sensitivity detection of the ERalpha disclosed by the invention greatly improves the detection accuracy. The kit has the advantages of good selectivity, strong stability, high sensitivity, anti-interference performance, environmental protection and the like.

The invention discloses a sodium-rich positive electrode material, a preparation method thereof and a sodium ion battery, the component of the positive electrode material is represented as NaxM1yFe1 / 3Sb1 / 3O2, and the element M1 is one or more of inactive metal elements without oxidation-reduction activity, such as Li, Na, Mg, Zn, Ca and the like. Wherein 1 < = x < = 4 / 3, 0 < = y < = 1 / 3. The positive electrode material is rich in sodium ions and has a special superlattice structure, a sodium ion battery prepared from the positive electrode material is high in reversible capacity and relatively high in capacity retention ratio, the problem that the capacity of the positive electrode material in the sodium ion battery is not high is solved, and the energy density of the battery is improved.

The present invention relates to a fuel cell / electrolyzer oxygen electrode material, a preparation method and its application, the chemical formula of which is A 1‑x A ′ x B n O 3‑δ , wherein A is one of Pr, Nd, Gd, Ce, Sm, A′ is one or any two of Ba, Sr, Ca, B contains Co and other metals, and the other metals are one or more of Ni, Fe, Nb, wherein 0<x<1, 0.75≤n≤1, 0≤δ≤1. The oxygen electrode material is obtained by dissolving the metal oxide or metal salt in dilute nitric acid, adding a reaction reagent to prepare a precursor solution, and then heating, drying, grinding, and high-temperature sintering. The oxygen electrode material involved in the present invention can be a layered perovskite structure oxide or a composite oxygen electrode material. Alkaline earth metal doping at the A position reduces its cost and enhances its redox activity. At the same time, the introduction of other metals at the B position to reduce the proportion of Co helps to improve thermal expansion matching. It is an excellent low-temperature proton ceramic fuel cell / electrolyzer oxygen electrode material.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a preparation method and application of a carbon dot loaded metal phthalocyanine composite material, and the specific preparation method comprises the following steps: mixing a carbon source, a nitrogen source and a metal salt, carrying out spray pyrolysis to obtain metal doped carbon dots, compounding the metal doped carbon dots and metal phthalocyanine into the carbon dot loaded metal phthalocyanine composite material, and preparing the carbon dot loaded metal phthalocyanine composite material. As a carrier, the carbon dots improve the dispersity of the metal phthalocyanine and prevent the metal phthalocyanine from being gathered, and the conductivity of the carbon dots promotes charge transfer of the metal phthalocyanine in catalysis or sensing; in addition, the electron storage and transfer capabilities of the carbon dots are combined with the redox active center of the metal phthalocyanine, so that the adsorption energy of a reaction intermediate can be optimized, and electron transfer is accelerated, thereby synergistically promoting the catalytic reaction. The preparation method is simple in process and low in cost, and the prepared composite material is regular in morphology and excellent in stability and can be effectively applied to the field of electro-catalysis, such as electro-catalysis nitric acid reduction and carbon dioxide reduction.

This invention belongs to the field of precious metal recycling technology and provides a method for efficient photocatalytic recovery of platinum group metals from catalysts and its application. The method includes the following steps: mixing spent catalyst pulverizer and metal powder, performing mechanochemical treatment, and then adding an acid solution for reaction to obtain a modified spent catalyst; mixing the modified spent catalyst with a leaching solution to obtain a suspension, then irradiating the suspension with ultraviolet-visible light for photocatalytic reaction and filtering to obtain a platinum group metal leaching solution and leaching residue; adjusting the pH of the platinum group metal leaching solution, adding an oxidant, and then using an extractant to extract and separate transition metal chlorides to obtain a platinum group metal solution. This invention employs mechanochemical activation while simultaneously regulating the platinum group metal particles to generate a plasma resonance effect. This invention utilizes the strongly redox active species generated by the photocatalyst under light conditions, which are then converted into soluble compounds through complexation, achieving efficient leaching and recovery.

The application discloses a kind of by mesoporous Fe 0 Nanometer material enhances the method for activity of gallic acid and application thereof.The present application fixes gallic acid (GA) with redox activity in mesoporous zero-valent iron nanoparticles (Fe 0 NPs), and then encapsulated by SiO2 outer layer containing disulfide bond (denoted as Fe 0 @GA-ss-SiO2NPs). With the help of intracellular glutathione, oxygen molecules are activated by electron transfer, and a large amount of O2 ·‑ And H2O2 are spontaneously generated, and the sustained high concentration of Fe 0 Fe 2+ Further catalyzes the decomposition of H2O2, and generates highly oxidized ·OH free radicals. At the same time, GA quinone derivatives produce 1 O2 by Russel mechanism. In vitro cell experiments confirm that the nanometer material can cause cancer cell ferroptosis, and exhibits high-efficiency cancer cell killing effect at ultra-low dose.

The application provides a preparation method of a specific stoichiometric ratio of O3 type layered sodium ion battery positive electrode material. By finely controlling the ratio of Ni, Fe and Mn, the main redox activity is controlled in a specific electric pair range, the structure stability and the electrochemical performance can be improved, and the phase transition can be effectively inhibited. The performance improvement is attributed to the favorable electronic structure given by the specific component ratio, which promotes the Mn 3+ / Mn 4+ and Fe 2+ / Fe 3+ redox couples to participate in cooperation, thereby expanding the charge compensation window and improving the structure stability. The precursor material is obtained by a simple coprecipitation method, and the obtained material has good consistency and low cost after further high-temperature calcination. The prepared sodium ion battery positive electrode material has excellent performance and is suitable for large-scale production.

The application discloses a perovskite phase additive, a perovskite thin film, a solar cell and a preparation method, a battery assembly and a power utilization device thereof. The perovskite phase additive comprises a heterometallic substituted polyoxometalate. The perovskite thin film and the perovskite active layer of the solar cell are doped with the perovskite phase additive. The heterometallic substituted polyoxometalate utilizes adjustable energy levels, multi-site coordination and gradient redox activity, can realize the synergistic effect of defect passivation, crystallization regulation and stability improvement of the perovskite thin film, and thus improves the photoelectric efficiency and working stability of the device.

The invention discloses a layered sulfide sodium-ion battery positive electrode material and application, and belongs to the technical field of sodium-ion battery positive electrode materials, the layered sulfide sodium-ion battery positive electrode material comprises a two-dimensional layered compound Na2AgSbS3, and can also comprise a carbon-based material. The preparation method of the two-dimensional layered compound Na2AgSbS3 comprises the following steps: mixing a silver source, an antimony source, a sulfur source and a sodium source, dissolving to obtain slurry, uniformly dispersing the slurry, sealing, heating at 150-180 DEG C for 110-130 hours, and purifying the obtained product to obtain the two-dimensional layered compound Na2AgSbS3. The layered sulfide sodium ion battery positive electrode material disclosed by the invention is excellent in structural stability, rich in intrinsic sodium and high in first efficiency, has high-potential oxidation-reduction activity, is beneficial to rapid transportation of Na < + > due to a layered channel, and is high in electrolyte compatibility and wide in application prospect.

The invention discloses a layered nanosheet Cu4 (OH) 6FCl electrode material and a preparation method and application thereof.According to the layered nanosheet Cu4 (OH) 6FCl electrode material and the preparation method and application thereof, a simple and convenient ion co-deposition method is adopted, NH4F and CuCl2. 2H2O which can be easily obtained are used as precursors to be subjected to a standing reaction to synthesize a three-dimensional Cu4 (OH) 6FCl nanosheet, the 3D porous structure can ensure that redox active sites of the Cu4 (OH) 6FCl electrode material are completely exposed, and the Cu4 (OH) 6FCl electrode material can be used for preparing the three-dimensional Cu4 (OH) 6FCl nanosheet. Ion diffusion kinetics are enhanced, and effective charge storage is increased. Compared with traditional transition metal halides (CuF2 and CuCl2), the cathode of the lithium metal battery based on Cu4 (OH) 6FCl shows excellent high reversible capacity and excellent cycling stability. Meanwhile, the simple and convenient synthesis method used in the invention effectively avoids the use of toxic reagents which are harmful to the environment, saves the cost and is suitable for large-scale production. The method conforms to the development concept of environmental protection, and unification of economic benefits, social benefits and environmental benefits is comprehensively achieved.

The invention relates to the field of functional material technologies and water treatment, in particular to a halogen coordination copper-based MOF material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving bivalent copper salt, a nitrogen-containing organic ligand, alkali and chloride in deionized water, carrying out hydrothermal reaction, separating, washing and drying to obtain the halogen-coordinated copper-based MOF material. The halogen coordination copper-based MOF material is synthesized through one-step hydrothermal reaction, the raw material cost is low, the preparation process is simple, and the prepared halogen coordination copper-based MOF material has Cu (I) redox activity, can achieve high adsorption and excellent selectivity on Ag < + > and has important significance on efficient recovery of Ag < + > in complex water.

The present application relates to a kind of preparation methods of COFs iodine vapor electrochemical sensor based on redox activity, which comprises adding COFs with redox activity into methanol, obtaining a mixture, transferring the mixture into the active area of interdigital electrode, evaporating solvent by heating, and obtaining iodine vapor electrochemical sensor.The iodine vapor electrochemical sensor of the present application has high stability, high selectivity and high sensitivity.When air mixed with iodine vapor passes through the electrochemical sensor, iodine is captured by the polymer film.Based on redox reaction, the impedance of the electrochemical sensor decreases rapidly, and iodine vapor can be detected sensitively and quickly.The preparation is simple, the cost is low, the process is simple and easy to produce, and the adsorption capacity is high, etc., and has good application prospect in the field of iodine vapor sensing technology, etc.

A Cr8O 21 This paper discloses an active-coated high-nickel NCM811 cathode material, its preparation method, and its application, relating to the field of cathode material preparation technology for new energy batteries. The material uses NCM811 as the core and is coated with Cr8O2. 21 Composition of the active oxide layer. Cr8O during low-temperature calcination. 21 The residual alkali on the NCM811 surface reacts to generate LiCrO2 with high ionic conductivity. This process not only reduces the residual alkali content on the surface but also enhances the lithium-ion interfacial transport kinetics through LiCrO2. Cr8O 21 Through its three-dimensional framework [Cr 3+ O6] / [Cr 6+ The alternating arrangement of O4] forms a fast lithium-ion channel, synergistically suppressing cation mixing, optimizing interfacial kinetics, and contributing redox activity. Therefore, this invention utilizes Cr8O 21 The design and optimization of the active oxide coating layer successfully achieved a synergistic improvement in the structural stability and electrochemical performance of the high-nickel NCM811 cathode material.

According to one or more embodiments described herein, an oxygen carrier material may comprise a redox active metal oxide and an alkali metal-containing composition. The alkali metal containing composition may have the formula NauKvLiw (SixAlyOz) r. In the formula, the sum of u, v, and w may be 1, the sum of x and y may be 1, z may be greater than 1.5, and r may be 0.02 to 20. Also described herein are methods of making oxygen carrier materials and methods of producing olefin compounds using oxygen carrier materials.

The invention discloses a high-molecular mediator catalyst, a composite positive electrode material and application of the composite positive electrode material. The high-molecular mediator catalyst is prepared from an organic micromolecular monomer with oxidation-reduction activity through a chemical or electrochemical polymerization method. A composite positive electrode material of a rechargeable metal-air battery or a lithium-sulfur battery is composed of the polymer mediator catalyst, a carbon material and a binder. The high-molecular mediator is formed by polymerizing organic micromolecular monomers through a chemical or electrochemical method, has a multifunctional catalytic characteristic, and is compounded with a high-pore carbon material to form a composite positive electrode material with a synergistic effect, so that the charge-discharge efficiency, the capacity and the cycle stability of a battery are remarkably improved.

The invention discloses a self-repairing flexible supercapacitor and a preparation method thereof, and belongs to the technical field of flexible energy storage devices. According to the capacitor, an HAZCN HOF electrode and PDA-PAM self-repairing hydrogel are seamlessly integrated to form an integrated structure, and efficient self-repairing is achieved through hydrogen bonds between the HAZCN HOF and the PDA-PAM hydrogel and the dynamic effect of pi-pi accumulation. According to the HAZCN HOF electrode, a three-dimensional frame structure containing rich hydrogen bonds and redox active sites is formed through dehydration condensation and self-assembly of cyclohexanehexone and 4, 5-diamino phthalonitrile. The PDA-PAM hydrogel electrolyte is copolymerized with acrylamide through dopamine to form an interpenetrating network containing catechol groups, intermolecular hydrogen bonds and pi-pi accumulation. The integrated flexible supercapacitor has high energy storage performance and excellent self-repairing characteristic, and has important application value in the field of wearable electronics.

The invention relates to a method for electrochemically detecting chloramphenicol by using molecular imprinting. The method is characterized in that a chloramphenicol molecularly imprinted polymer prepared from a temperature-sensitive monomer N-isopropylacrylamide and Dawson type tungsten phosphate (P2W18) are jointly modified on a substrate electrode through a simple and controllable electrostatic layer-by-layer self-assembly method. The modified electrode synthesized by the method disclosed by the invention is used as a working electrode, a saturated calomel electrode is used as a reference electrode, a platinum electrode is used as an auxiliary electrode, and the electrochemical sensing performance of the modified electrode on chloramphenicol is respectively evaluated by cyclic voltammetry, differential pulse voltammetry and square wave voltammetry. According to the modified electrode, the sensitivity of an electrochemical signal is synergistically enhanced through the high-selectivity imprinting cavity of the molecularly imprinted polymer and the rapid and reversible oxidation-reduction activity of P2W18, the detection linear range of chloramphenicol is 0.1 nM to 10 [mu] M, and the detection limit of differential pulse voltammetry is as low as 0.145 nM; and a good application prospect is provided for preparing a uniform and controllable molecularly imprinted polymer composite modified electrode material in the future. At present, an indissolvable molecularly imprinted polymer material is integrated into an electrochemical sensor through an electrostatic layer-by-layer self-assembly technology, so that the research on improving the selectivity of chloramphenicol detection and reducing the detection limit is rarely reported.

The application belongs to the technical field of capacitors, and discloses a nickel-iron Prussian blue supercapacitor electrode material, a preparation method thereof and a supercapacitor, which comprises the following steps: dissolving nickel chloride hexahydrate, iron trichloride hexahydrate and trisodium citrate dihydrate in water to obtain reagent A, dissolving potassium ferricyanide in water to prepare a solution to obtain reagent B; slowly adding reagent B into reagent A under room temperature, stirring, and then placing the mixed solution under room temperature, washing, centrifuging, collecting the precipitate, and vacuum drying to obtain a nickel-iron Prussian blue material PBA; by adjusting the amount of trisodium citrate and the ratio of nickel to iron, the two play a synergistic role to achieve the effect of high specific capacitance (140.25 F·g ‑1 ) and cycle stability (84.35% retention rate after 2000 cycles), and when the two synergistically act, the structural stability and redox activity of the material can be effectively enhanced, and finally the balance between high specific capacitance and excellent cycle stability is achieved.