34 results about "Polyaniline composite" patented technology

The invention discloses an application of a chiral polylactic acid piezoelectric material doped polyaniline composite friction film in degradation of organic pollutants. The application specifically comprises the following steps: adhering the chiral polylactic acid piezoelectric material doped polyaniline composite friction film to the bottom of a turntable, and adhering a friction bottom sheet to the bottom in a flat-bottom container; the organic pollutant solution is poured into the container, the rotating disc adhered with the friction film is placed in the container for equilibrium adsorption, and one side of the friction film faces upwards; the turntable is turned over to enable one side of the friction film to face downwards to form a friction pair with the friction bottom plate, and the turntable is started to rotate for friction catalysis to realize degradation of organic pollutants. The conductivity of polyaniline is combined with the piezoelectric and chiral characteristics of chiral polylactic acid, a flexible friction film is obtained through a solution casting method, the flexible friction film and a friction bottom form a friction pair, active free radicals are generated through the triboelectric effect, high-concentration organic pollutants are efficiently degraded, and environment-friendly and efficient pollutant degradation at normal temperature and pressure is achieved.

The application discloses a kind of hydrophobic modified anticorrosive coating and preparation method thereof, the method for preparing hydrophobic modified anticorrosive coating includes: anticorrosive coating is soaked in PDMS homogeneous solution, stationary, solidification, obtains hydrophobic modified anticorrosive coating, the preparation of anticorrosive coating includes: coating is scraped, dry, solidification, obtains anticorrosive coating, wherein, the preparation method of coating includes: g-C3N4 is etched in acidic solution, ultrasonic, obtains etching g-C3N4;Etching g-C3N4, aniline and water are mixed, adjust pH, obtain the polyaniline precursor solution of pH 1~4, polyaniline precursor solution is photopolymerization, obtains second precipitation, washes, freeze-drying, obtains polyaniline composite nanomaterial;Polyaniline composite nanomaterial is dispersed in waterborne epoxy resin, first stirring is then ultrasonic, obtains first solution, first solution and curing agent are mixed to be uniform, obtain coating.The hydrophobic modified anticorrosive coating of the application has the advantages of corrosion resistance, ultraviolet resistance, algae resistance, high hydrophobicity and long service life.

The application belongs to the technical field of all-vanadium redox flow battery separators, and specifically discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyether ether ketone with concentrated sulfuric acid, heating and reacting in a water bath, and preparing sulfonated polyether ether ketone solids; mixing molybdenum disulfide with toluene, ultrasonicating, adding 1,3-propanesultone, and heating in an oil bath to prepare sulfonated molybdenum disulfide powder; mixing the sulfonated molybdenum disulfide powder, polyaniline and a DMF solution, stirring and ultrasonicating, adding sulfonated polyether ether ketone solids, stirring to obtain casting membrane slurry, coating on a glass plate, drying into a film, sequentially immersing in a sulfuric acid solution and deionized water, and obtaining the sulfonated polyether ether ketone / polyaniline composite membrane. The application discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyether ether ketone / polyaniline composite membrane has high proton conductivity, can maintain a low vanadium ion permeability, and improves the electrochemical performance of an all-vanadium redox flow battery.

The invention relates to the technical field of gas adsorption materials, in particular to a dissimilar metal-organic framework confinement polyaniline composite adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: adopting chromium-copper dissimilar metal matching, and constructing a stable Lewis acid site in an MIL-101 skeleton; introducing a sulfonic acid group through a ligand exchange strategy, and establishing a Bronsted acid site; and finally, carrying out confinement polymerization on aniline in MOF pore channels to form rich hydrogen bond binding sites so as to obtain the dissimilar metal-organic framework confinement polyaniline composite adsorbent. According to the dissimilar metal-organic framework confined polyaniline composite adsorbent disclosed by the invention, through triple synergistic effects of dissimilar metal Lewis acid sites, sulfonic acid group Bronsted acid sites and polyaniline hydrogen bond sites, a multiple ammonia gas capture mechanism is constructed, and the adsorption efficiency and adsorption effect on ammonia gas are remarkably improved.

A solid electrolytic capacitor including a porous body containing a valve metal, a dielectric layer formed on a surface of the porous body, and two or more conductive layers covering the dielectric layer, the two or more conductive layers including a first conductive layer formed on a surface of the dielectric layer and a second conductive layer laminated on the first conductive layer, the second conductive layer contains a polyaniline composite in which polyaniline is doped with a proton donor.

This invention relates to the field of electrochromic functional thin film preparation technology, and particularly to a Prussian blue / polyaniline composite electrochromic thin film, its preparation method, and its applications. The invention employs a constant current method to deposit a Prussian blue underlayer on the surface of a transparent conductive substrate; the obtained Prussian blue underlayer is pre-activated in a potassium-containing electrolyte; subsequently, a polyaniline surface layer is deposited in a polymerization solution containing aniline monomers and an acidic electrolyte using a segmented constant potential method; and finally, a post-conditioning treatment is performed to obtain the Prussian blue / polyaniline composite electrochromic thin film. By introducing a pre-activation step, a segmented deposition step, and a post-conditioning step, this invention improves the interfacial bonding, ion transport, and surface uniformity of the composite film, reducing agglomeration and scattering losses caused by continuous overgrowth of polyaniline. This results in a composite film with fast response, high transmittance adjustment capability, and good cycling stability, making it suitable for electrochromic display devices, smart windows, and transmittance-adjustable optical devices.

The application belongs to the technical field of aluminum batteries, and particularly relates to a graphite@polyaniline composite material and a preparation method and application thereof. In-situ growth of polyaniline is utilized to expand the interlayer spacing of graphite nanolayers, which is beneficial to embedding / detaching reactions in the reaction process of aluminum-graphite batteries, and the actual specific capacity of the aluminum-graphite batteries is improved. The process is simple, the cost is low, the aluminum ion secondary battery with high stability and high capacity can be obtained, and the application is green and environment-friendly.

The invention discloses a carbon micro powder / polyaniline composite yarn capable of being used for a supercapacitor and a preparation method thereof. The composite yarn provided by the invention is of a multi-layer columnar structure, the outer layer is polyaniline, the middle layer is a non-woven fabric strip, and the core layer is carbon micro powder. The method comprises the following steps: firstly, preparing fibers into carbon micro-powder, and constructing a fine carbon micro-powder pore structure by accurately regulating and controlling the time and temperature of a carbonization process; then, carbon micro powder is arranged in non-woven fabric strips through a particle flow spinning technology and twisted into yarn; and finally, polymerizing a polyaniline conductive layer on the surface of the yarn body in situ. According to the yarn, through the design of the multi-layer composite structure, the loading capacity of the carbon micro powder is greatly increased, the energy storage performance of the yarn is improved, polyaniline attachment sites are increased through the porous network structure of the non-woven fabric strips, the polyaniline falling risk is reduced, and the flexibility of the yarn is improved. The comprehensive electrochemical performance of the yarn-based energy storage device is remarkably improved, and the yarn-based energy storage device has wide application prospects in the fields of flexible electronics, wearable equipment and the like.

The invention discloses a polyaniline composite material. The polyaniline composite material comprises a carrier, iron and polyaniline, wherein the surface of the iron is provided with a Fe2O3 layer, the iron is uniformly distributed on the surface of the carrier, the carrier and the iron are coated with the polyaniline, and the polyaniline is in a nanofiber shape. The invention also discloses a preparation method of the polyaniline composite material, which is characterized by comprising the following steps: uniformly mixing the carrier, the iron powder and the aniline, standing, and adding an initiator solution for polymerization reaction to obtain the polyaniline composite material. The invention also discloses the polyaniline composite material and application of the polyaniline composite material prepared by the method in selective adsorption of bromide ions and preparation of elemental bromine by catalytic oxidation. The invention also discloses a method for preparing the elemental bromine from the high-salinity brine. According to the polyaniline composite material, high-halogen brine is used as a raw material, a large amount of Br <-> can be adsorbed, oxidation and desorption are carried out synchronously, and the elemental bromine and the activated polyaniline composite material are prepared synchronously.

The invention relates to a printed circuit board embedded resistance material and a high-frequency impedance regulation and control method thereof, the resistance material comprises modified polyaniline, a high-molecular polymer and a curing agent, and the agglomeration problem of polyaniline in the high-molecular polymer is effectively solved. The regulation and control method comprises the following steps: preparing a printed circuit board embedded resistor material; acquiring physical parameters and impedance data of the resistance material; establishing a relation model of the impedance data and the physical parameters of the resistance material; according to the impedance requirement of the embedded resistor material, mapping physical parameters of the resistor material through the established relation model; and selecting a high-molecular polymer with a corresponding dielectric constant and modified polyaniline with corresponding conductivity and mass fraction according to the obtained physical parameters of the resistance material to obtain the required resistance material. According to the method, a complicated parasitic parameter problem is converted into a measurable and controllable material formula problem, and a brand new solution is provided for realizing'accurate design 'and'on-demand preparation' of impedance of the polyaniline composite material.

The invention relates to a flexible ammonia concentration and distance double-parameter sensing element and a preparation method thereof, and belongs to the technical field of flexible sensors. According to the sensing element, a polyimide (PI) flexible substrate with a central electrode lead is used as a substrate, and a spiral carboxylated multi-walled carbon nanotube and dodecylbenzene sulfonic acid doped polyaniline composite material (MWCNT-COOH-DBSA-PANI) is used as a sensitive material; according to the sensing element, the distance is detected through an eddy current effect generated by a spiral sensitive material, and the ammonia gas concentration is detected by virtue of the synergistic gas-sensitive characteristics of MWCNT-COOH and DBSA-PANI; wherein the DBSA-PANI is used as a p-type semiconductor material and endows the sensor with the capability of detecting ammonia gas (NH3) at normal temperature, the MWCNT-COOH is used for constructing a three-dimensional conductive network and is connected with the DBSA-PANI, a rough surface structure formed by the MWCNT-COOH provides more active sites for NH3, and the NH3 adsorption capability of the sensing element is enhanced. The sensing element prepared by the invention has the advantages of flexibility, simple structure and convenience in attachment, and is suitable for synchronously sensing the ammonia concentration and distance between narrow curved surface layers of complex industrial equipment.

The invention belongs to the technical field of membrane separation, and particularly relates to a preparation method of a polytetrafluoroethylene composite membrane. The preparation method comprises the following steps: (1) dissolving a spinning auxiliary agent, a barium source, a titanium source and a manganese source in a composite solvent, and carrying out electrostatic spinning to prepare precursor fibers; then blending the precursor fiber with a grain refiner, and carrying out heat treatment to obtain a doped ferroelectric fiber bundle; (2) further carrying out polymerization reaction on the organic acid, the inorganic acid, the conductive filler and the conductive polymer with a monomer and an oxidizing agent to finally prepare a conductive polyaniline compound; (3) doping the Mxene and conductive polyaniline compound into the PTFE water-based emulsion, continuously doping the doped ferroelectric fiber bundle, and stirring to obtain a suspension; the suspension is subjected to laying, post-treatment and heat preservation, and the polytetrafluoroethylene composite film is obtained. According to the preparation method, the doped ferroelectric fiber bundles, the conductive polyaniline compound, Mxene and PTFE are doped, so that the pollution resistance of the polytetrafluoroethylene film in long-term use is improved.

The application belongs to the field of water treatment, and particularly relates to application of a molybdenum disulfide / polyaniline composite MoS2@PANI in cooperation with copper ion activated persulfate in degradation of antibiotics in water. The MoS2@PANI is synthesized by modification of MoS2 with PANI. The degradation method is to add MoS2@PANI, Cu(II) and persulfate into water containing antibiotics to be treated to form a degradation reaction system, and then to degrade and remove the antibiotics. The application is green and efficient, and can effectively improve the removal rate of Cu(II) / persulfate in degradation of antibiotics in water by adding MoS2@PANI as a catalyst, thereby reducing the addition amount of Cu(II) and persulfate, further expanding the applicable pH environment, and having a broad industrial application prospect.

The invention discloses a step-by-step electro-deposition preparation method of a sulfur / polyaniline composite positive electrode. Sulfur is deposited firstly, then aniline is polymerized, and the prepared composite positive electrode has high specific capacity and excellent cycling stability. Under the 0.2 C multiplying power, the specific capacity of the first circulation area reaches 140 mu Ah / cm < 2 >, the specific capacity retention ratio after 100 times of circulation is 89.9%, and the specific capacity retention ratio is obviously superior to that of a pure sulfur positive electrode (58 mu Ah / cm < 2 >, 85.1%). The invention discovers and utilizes the synergistic effect of the electropolymerization process of aniline on the in-situ activation and morphology reforming of sulfur. The invention provides a new way for preparing the positive electrode of the high-performance lithium-sulfur battery.

This invention relates to the field of polymer materials technology, and particularly to a high-adhesion modified polyaniline composite material and its preparation method, comprising the following steps: (1) washing glass fibers with acetone to obtain pretreated glass fibers; (2) preparing a silane hydrolysate; (3) immersing the pretreated glass fibers in the silane hydrolysate to obtain mercapto-modified glass fibers; (4) preparing compound (I) of formula I using mercaptoacetic acid and aniline as the starting point for synthesis; (5) preparing modified polyaniline by combining the compound of formula I with p-phenylenediamine and aniline; (6) crosslinking the mercapto-modified glass fibers and modified polyaniline through disulfide bonds to obtain the modified polyaniline composite material. The modified polyaniline composite material of this invention has good adhesion, resistance to damp heat, impact resistance, electrical conductivity, and self-healing ability.

The present application provides a kind of porous carbon polyaniline composite material and its preparation method and application, corn straw charcoal-based paint and coating, belong to biomass utilization technical field.The present application is based on corn straw raw material, and porous corn straw charcoal composite material of polyaniline supported, i.e.porous carbon polyaniline composite material.After water contact angle and electrochemical impedance test, it is found that porous carbon polyaniline composite coating has excellent water solution repellency and larger resistance, its superhydrophobicity makes it have excellent self-cleaning and stain resistance, and the pi-pi conjugation of polyaniline along polymer main chain makes it have high conductivity and redox activity, and it shows excellent performance in corrosion protection.

The invention relates to a polyvinylidene fluoride / polyaniline composite conductive fiber membrane material as well as a preparation method and application thereof. The preparation method comprises the following steps: spinning by adopting an electrostatic spinning method to prepare a PVDF nanofiber membrane; the preparation method comprises the following steps: mixing water, absolute ethyl alcohol and phytic acid, then adding aniline into the mixed solution to obtain an ANI growth solution, and finally immersing the PVDF nanofiber membrane in the ANI growth solution; and adding an oxidizing agent into the ANI growth solution containing the PVDF nanofiber membrane, and polymerizing in a water bath of-5 to 0 DEG C for 6-12 hours. According to the invention, phytic acid (PA) is adopted as mild protonic acid, and a PVDF / PANI-PA nanofiber membrane with a uniform core-shell structure is constructed. The ANI in the multifunctional film can uniformly grow on the surface of the PVDF nanofiber, meanwhile, high porosity, high air permeability and high conductivity of the fiber film are kept, and EMI shielding and human motion monitoring can be achieved.

The invention relates to the technical field of preparation of high-molecular polymer films, in particular to a high-orientation graphene / polyaniline composite film and a preparation method thereof. Graphene nanosheets are introduced into a polyaniline film, and a high-orientation graphene / polyaniline composite film is successfully prepared through an ultra-spreading technology. Promoting the graphene two-dimensional nanosheets to be highly oriented in the composite film by utilizing shearing force of liquid flow to form a tightly stacked layered structure; and meanwhile, through the synergistic effect of graphene and polyaniline, the charge transfer efficiency and the flexibility of the film body are remarkably improved. The graphene / polyaniline composite film prepared by the research has high conductivity and excellent mechanical properties, and has wide application potential in the fields of flexible sensors, supercapacitor electrodes, electromagnetic shielding, anti-corrosion coatings and the like.

The invention discloses a lignin polyaniline composite binder, preparation thereof and application of the lignin polyaniline composite binder in a hard carbon negative electrode of a sodium-ion battery. The method comprises the following steps: firstly, performing carboxymethylation modification on lignin to obtain carboxymethyl lignin; then, polyhydric alcohol serves as a cross-linking agent, a covalent bond is formed through dehydration condensation of hydroxyl on a molecular chain of the polyhydric alcohol and carboxyl of the carboxymethyl lignin, meanwhile, the polyhydric alcohol, the conductive polyaniline and the carboxyl of the carboxymethyl lignin are subjected to cross-linking compounding through the hydrogen-bond interaction between the hydroxyl of the polyhydric alcohol and amino on a molecular chain of the conductive polyaniline, and the lignin polyaniline composite binder is constructed. According to the composite binder, the compatibility of a hard carbon negative electrode and an ester or ether electrolyte is improved, and the structural integrity of the electrode and a stable SEI film can be effectively maintained in the circulation process, so that the first effect, the circulation stability and the rate capability are remarkably improved.

The invention discloses a weldable primer on the surface of a hot-rolled plate with oxide scale. The weldable primer comprises the following components in percentage by mass: 20-30% of water-based acrylic emulsion; 10%-20% of silica sol; 20%-25% of a bacterial cellulose / polyaniline composite material; 8%-12% of zinc powder; 3%-8% of nano cellulose; 2%-4% of polyoxyethylene polyoxypropylene glycerol ether; 3%-5% of modified sodium polyacrylate; and the balance of deionized water. The primer provided by the invention has good adhesive force, flexibility, corrosion resistance, recoatability and excellent welding and cutting performance, and can be directly coated and welded under the condition that oxide scales are not removed.

The application discloses an absorption loss type electromagnetic shielding material based on conductive nanofibers and a preparation method thereof, and adopts an in-situ polymerization method to prepare a polyaniline / MXene composite material with good conductivity, then introduces the composite material into an aqueous solution of polyethylene glycol and polyvinyl alcohol to obtain a conductive mixed solution, then prepares conductive nanofibers through electrospinning, and finally obtains the absorption loss type electromagnetic shielding composite material based on the conductive nanofibers through crosslinking of the obtained conductive nanofibers. The material obtained by the application not only has very good structural stability, but also has good electromagnetic shielding performance, and the average shielding efficiency in the X wave band is 28 dB, wherein the absorption loss is 24 dB, and excellent electromagnetic shielding and absorption performance is exhibited. The good conductivity of the obtained nanofibers promotes dielectric loss of electromagnetic waves, and the large specific surface area and rich pore structure of the nanofibers provide a favorable place for multiple reflection loss and absorption loss of electromagnetic waves in the material, so that the conductive nanofibers obtained by the application exhibit good electromagnetic shielding performance, and have a good application prospect in the electromagnetic protection field.

The embodiment of the invention discloses a preparation method of a negative active material, a negative plate and a battery. The preparation method of the negative electrode active material comprises the following steps: carrying out ball milling treatment on a first mixture containing MXene and polyaniline, so as to load polyaniline on MXene to obtain a composite material MXene polyaniline; and carrying out hydrothermal reduction treatment on the MXene polyaniline, so that oxygen vacancies are generated on the surface of MXene, and the negative electrode active material is obtained. Through ball milling treatment, polyaniline can enter the interlayer of MXene, MXene nanosheets are prevented from being stacked, and the capacitance of a single material is improved; the polyaniline exists between layers of the MXene, molecular chains of the polyaniline are not prone to agglomeration in the charging and discharging process, volume expansion of the pseudocapacitance material is effectively prevented, and the electrochemical stability of the MXene polyaniline composite material is improved; the hydrothermal reduction treatment can generate oxygen vacancies on the surface of MXene to form an electron-rich state structure, the oxygen vacancies can reduce electron transport energy barriers and improve surface reaction kinetics, and the electron-rich state can enhance the interface charge storage capacity.

The invention relates to the field of lithium ion batteries, in particular to a semi-solid-state battery tab material with a three-layer functional composite coating and a preparation method of the semi-solid-state battery tab material. According to the tab material based on the multi-layer composite coating and the preparation method thereof provided by the invention, the interface contact resistance between a tab and an electrolyte is reduced through the mutual cooperation of the substrate layer, the arrangement of the substrate layer, the middle layer (the silver-silicon carbide nanowire composite coating) and the outer layer (the graphene coated copper nanowire / polyaniline composite film); the anisotropy of the tab material is optimized, efficient heat dissipation is realized, the mechanical compatibility of the tab and the electrode material is improved, and thermal stress cracks are inhibited, so that the safety risk is avoided.

The invention discloses a polyaniline coated silicon nanoparticle composite material prepared by a photo-initiation method and a preparation method of the polyaniline coated silicon nanoparticle composite material, and provides a silicon-based lithium battery negative electrode material based on the composite material. Therefore, uniform and compact polyaniline coating layers are formed on the surfaces of the particles, and finally the silicon nanoparticle / polyaniline composite material with the controllable structure is obtained. When light reaches the surfaces of the silicon nano-particles, the silicon nano-particles serving as a semiconductor material generate a photoelectric effect, separation of photo-generated holes and photo-generated electrons occurs, the photo-generated holes with strong oxidizing property oxidize aniline monomers adsorbed on the surfaces of the silicon nano-particles in a solution, and thus polyaniline coating layers are generated on the surfaces of the silicon nano-particles in situ. The synthesis thought is based on the semiconductor photoelectric effect of silicon, the method is simple and environment-friendly, and the obtained lithium ion battery negative electrode material is excellent in performance and has very wide application prospects.

The invention discloses a preparation method of a polyaniline modified cobalt-zinc double-metal hydroxide electrode material and an application of the polyaniline modified cobalt-zinc double-metal hydroxide electrode material in electrolyzing concentrated seawater. The preparation method comprises the following steps: step 1, preparing a ZnCo-LDH / PTFE membrane catalyst; step 2, preparing a ZnCo-LDH coated polyaniline compound: (1) putting a ZnCo-LDH / PTFE membrane catalyst into a penetration type membrane reactor, and constructing a circulating flow heterogeneous system; 2) mixing potassium peroxymonosulfate with an aniline solution to prepare a mixed solution B; and (3) carrying out polymerization reaction on the mixed solution B through a circulating flow heterogeneous system at the flow speed of 1.5-3mL / min to obtain the ZnCo-LDH polyaniline compound. The ZnCo-LDH is subjected to surface modification by designing a ZnCo-LDH and polyaniline composite catalytic system, a novel composite electrode material is constructed, electrochemical activation can be realized in a concentrated seawater medium, active chlorine species can be efficiently generated, the efficiency of preparing sodium hypochlorite through electrolysis is improved, pollution abatement and resource utilization of concentrated seawater are synchronously realized, and the application prospect is wide. The method is suitable for industrial popularization.

The invention discloses a vortex flexible fiber membrane with an interstitial ammonia gas measurement function and a development method of the vortex flexible fiber membrane. The vortex flexible fiber membrane is composed of a flexible thermoplastic polyurethane (TPU) fiber membrane, a copper electrode lead and a vortex sensitive layer; the preparation method comprises the following steps: preparing a flexible TPU fiber film by adopting a high-voltage electrostatic spinning process; preparing a copper electrode lead on the surface of the flexible TPU fiber film through a magnetron sputtering process, and then preparing through holes in the two ends of the copper electrode lead; preparing a carboxylated multi-walled carbon nanotube and dodecylbenzene sulfonic acid doped polyaniline composite dispersion liquid, covering the surface, away from the copper electrode lead, of the flexible TPU fiber film with a spiral mask, and depositing the composite dispersion liquid on the surface of the flexible TPU fiber film through a pneumatic spraying technology to form a vortex sensitive layer; a multi-process fusion technology is adopted, and the prepared vortex flexible fiber membrane with the gap ammonia gas measurement function can be directly attached to a curved surface and has the capability of detecting the gap and the ammonia gas concentration.

The invention discloses a heterostructure MXene / PANI composite hybrid electrode for a supercapacitor and a preparation method of the heterostructure MXene / PANI composite hybrid electrode. The preparation method comprises the following steps: (1) preparing multiple layers of Ti < 3 > C < 2 > T < x > MXene; (2) preparing a Ti < 3 > C < 2 > T < x > MXene nanosheet; and (3) preparing the multi-layer composite material MXene / PAN. According to the preparation method, the MXene (Ti3C2Tx) / PANI (polyaniline) composite material is successfully synthesized through Ti3AlC2MAX etching and simple polymerization. In the work, due to electrostatic interaction, dense polyaniline covering layers appear on the surface and between layers of the two-dimensional MXene. The electrochemical performance of the Ti < 3 > C < 2 > T < x > MXene, PANI and MXene / PANI composite electrodes is researched. Crystalline phase data and morphology of the sample are observed through x-ray diffraction analysis, a scanning electron microscope and a transmission electron microscope.

The application discloses a flaky nickel-zinc ferrite / polyaniline composite wave-absorbing material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving metal salt in deionized water, stirring to obtain solution A; dissolving sodium carbonate and sodium hydroxide in water, stirring to obtain solution B; adding solution B into solution A drop by drop, adjusting pH, standing for crystallization, centrifuging, washing and drying the product to obtain a precursor; high-temperature calcining the precursor in a muffle furnace, adding the obtained flaky nickel-zinc ferrite into a mixed solution of hydrochloric acid and ethanol, adjusting pH, and drying to obtain a hydroxylated ferrite; ultrasonic dispersing the hydroxylated ferrite in an ammonium persulfate hydrochloric acid solution to obtain a dispersion liquid, adding the dispersion liquid into an aniline dichloromethane solution drop by drop, standing for reaction at constant temperature for a period of time, and centrifuging, washing and drying to obtain the flaky nickel-zinc ferrite / polyaniline composite wave-absorbing material. The preparation method is mild, and the prepared wave-absorbing material has good wave-absorbing performance.

The application discloses a preparation method of a wet synthesis coupling cyclic voltammetry method for constructing interwoven network structure tungsten oxide / polyaniline composite nanomaterials. The method adopts hydrothermal and cyclic voltammetry methods in sequence, and uses an aqueous solution containing sodium tungstate dihydrate (Na2WO4.2H2O), ammonium sulfate ((NH4)2SO4) and aniline as a reaction solution, so as to obtain interwoven network structure tungsten oxide / polyaniline composite nanomaterials which grow along the surface of a current collector in situ. The preparation method can directly obtain the interwoven network structure tungsten oxide / polyaniline composite nanomaterials which grow along the surface of the current collector, and is beneficial to guarantee and improve the effective activity of the material. Secondly, polyaniline is a conductive polymer, and the interwoven network structure formed by polyaniline and tungsten oxide can guarantee efficient transmission of electrons and improve the conductivity of the material. Thirdly, the nitrogen-containing groups carried by polyaniline can induce active cations in a solution to diffuse to the surface of an active component, and then promote the kinetics process of diffusion of the active cations to the interlayer of the tungsten oxide, so as to improve the diffusion coefficient of the active cations.

The invention relates to the technical field of hydrogen peroxide sensors, in particular to a hydrogen peroxide sensor and a preparation method and application thereof. B, soaking the pretreated electrode in aniline-acid electrolyte, and obtaining a polyaniline modified electrode by using an electrochemical polymerization method; c, the polyaniline modified electrode is soaked in a platinum precursor solution, and a grape platinum nanoparticle-polyaniline composite electrode is obtained through an electrochemical method; and D, carrying out shape modification on the vibrio platinum nanoparticles in the vibrio platinum nanoparticle-polyaniline composite electrode by adopting a polarized square wave voltammetry to form a cubic platinum nanoparticle-polyaniline composite electrode, thereby obtaining the hydrogen peroxide sensor. According to the preparation method of the hydrogen peroxide sensor, the preparation method is simple and high in operability, and the obtained hydrogen peroxide sensor shows high detection sensitivity, high anti-interference performance and high performance stability on hydrogen peroxide.