45 results about "Electrodes platinum" patented technology

The invention discloses a manufacture method of a silver hybridization mesoporous ferroferric oxide antibiotic immunosensor and the application thereof. The manufacture method of the electrochemical immunosensor includes modifying thionine-graphene mixed solution on the surface of a glassy carbon electrode, conducting cross linking on an antibiotic antibody incubated by Ag-Fe3O4 mesoporous nanometer particles, closing non-specificity active sites by bovine serum albumin to manufacure the antibiotic electrochemical immunosensor. A detection method of antibiotic is that a reference electrode-saturated calomel electrode, an electrode-platinum filament electrode and a working electrode are correctly connected on an electrochemical working station, and immunodetection is conducted through the square wave voltammetry. The antibiotic electrochemical immunosensor has high sensitivity and selectivity, is simple in detection method and has the advantages of being quick, high in efficiency, goodin specificity, low in cost, convenient to operate and the like. It takes to 2-3 minutes to finish one detection process.

The invention relates to a grapheme-modified platinum electrode. The grapheme-modified platinum electrode is formed by oxidizing a platinum electrode on a silicon chip to generate a carbon dioxide layer for serving as a substrate, evaporating a metal platinum electrode on the carbon dioxide substrate and growing grapheme on the platinum electrode. A stripping voltammetry method is adopted, the grapheme-modified platinum electrode manufactured with an MEMS (Micro-electromechanical System) is taken as a working electrode, an Ag/AgCl electrode is taken as a reference ratio electrode, a platinum wire electrode is taken as a counter electrode, parameter selection of post-treatment, enriching time, potential setting, stripping voltammetry are performed, the heavy metal extreme value is 0.05 mg/L according to detection, and a provided G/Pt electrode has remarkably higher detection sensitivity than a naked Pt electrode.

The invention discloses a silver halide/ silver phosphate heterojunction membrane visible photo-catalysis material and a preparation method thereof. The chemical formula of the silver halide/ silver phosphate heterojunction membrane visible photo-catalysis material is AgX/ Ag3PO4, wherein X is Cl, Br or I. The method comprises the following steps of: dissolving phosphate, halide and polyvinyl pyrrolidone into water to form electrolyte, performing anodic oxidation for 20 to 50 minutes under the potential of 0 to 1V by using a Ag membrane as a research electrode, using a platinum electrode as an auxiliary electrode and using a mercury-mercurous sulfate as a reference electrode, flushing the obtained material by using distilled water, naturally drying in air in dark, and thus obtaining the silver halide/ silver phosphate heterojunction membrane visible photo-catalysis material, wherein the Ag membrane is a silver foil of which the purity is more than 99 percent or is prepared from conductive matrix by a deposition process, and the purities of the chemical reagents are greater than chemical purities. Through a prepared heterojunction membrane, the photo-catalytic activity of the silver phosphate can be improved, and the problem that powdery photo-catalyst is difficult to recover is solved at the same time.

The invention relates to a method for preparing an electrode and particularly relates to a method for preparing a platinum-gold double metal doped TiO2 nanotube electrode. The method comprises the following steps: (1) preparing a TiO2 nanotube on a titanium substrate in the mixed electrolytic solution of sodium fluoride and phosphoric acid through anodizing and calcining; and (2) applying platinum and gold to the surface of the TiO2 nanotube in two steps in the electrolytic deposition solution of chloroauric acid and potassium sulfate and the electrolytic deposition solution of chloroplatinic acid and potassium sulfate through reducing at a constant potential to obtain the platinum-gold double metal doped TiO2 nanotube electrode. The platinum-gold double metal doped TiO2 nanotube electrode prepared by adopting the method has the advantages that platinum and gold particles are small in size and uniform in distribution. The platinum-gold double metal doped TiO2 nanotube electrode has the activity of eclectically catalyzing and oxidizing methanol, ethanol and glycerol, has a good effect of degrading when being used for photo-eclectically catalyzing and oxidizing organic matters and is improved in photo-eclectically catalyzing properties significantly.

The invention relates to an electrochemical method for detecting banned additive urotropin in food, which comprises the following steps of: respectively and simultaneously inserting a working electrode carbon paste electrode, a reference electrode saturated calomel electrode and a counter electrode platinum sheet into 0.1mol.L-1PBS (Phosphate Buffer Solution) buffer solution to carry out differential pulse voltammetry scanning to obtain the oxidation peak current value of the urotropin, wherein the pH of the buffer solution is 6, the buffer solution contains a series of urotropin standard solution in different concentrations, and the oxidation peak current value and the concentration of the urotropin have a good linear relationship; with the same method, the oxidation peak current value of the sample solution is obtained; and according to a standard curve and a corresponding linear regression equation, the density of the urotropin in the sample is obtained. The method is simple in operation, is convenient and quick and has a low detection cost, and the urotropin can be directly detected.

The invention pertains to the technical field of film, in particular to a method for preparing titanium nitride film under room temperature. Wherein, nanometer powder of titanium nitride is taken as raw material, a DC stabilized power supply or constant potential meter is used in such a way that the positive pole of the DC stabilized power supply is connected with an electro conductive base, the negative pole is connected with a pair-electrode platinum sheet or graphite; the input voltage of the DC stabilized power supply or the constant potential meter is adjusted to 10 swung dash 20 V, the time for electrophoresis is controlled to be 0.5 swung dash 10 hour; the electrolyte is turbid liquid containing 5 swung dash 20g/L nanometer titanium nitride; the solution is magnetically mixed during the electrophoresis deposition; when the power is on, the titanium nitride deposits on the job's surface to form color titanium nitride film. The TiN film prepared by the invention is of special color and good adhesive, in addition, the process in the invention is simple, easy to operate and requires no hi-temp atmosphere.

The invention discloses a method for accelerating aging of Baijiu by electrochemical oxidation. The method comprises the following steps: immersing a gold electrode into a self-assembly solution for reaction, and forming a three-electrode system by using a self-assembly membrane modified gold electrode as a working electrode, a silver/silver chloride reference electrode and a platinum net electrode counter electrode; putting the three-electrode system into a container containing new wine, testing a volt-ampere spectrum in an interval of [-1V, 0V], and recording a reduction potential Vre of thevolt-ampere spectrum; putting the three-electrode system into a container containing new wine, and setting the oxidation voltage to be Vre+(0.7-0.9)V by adopting a chronoamperometry; recording the initial potential reaction current as I<0>; and when the reaction current I<1> is increased to 1.2-1.5 times of the I<0>, stopping aging. The method has the advantages that the self-assembled membrane modified gold electrode is used as a working electrode, a proper oxidation potential is selected to oxidize new wine, and aging acceleration is stopped under a proper reaction current condition. On thepremise of ensuring the quality stability of the Baijiu, the aging time of the Baijiu is shortened.

The invention discloses a device and a method for coating a platinum electrode in an oxygen sensor. The method includes the following steps: A. preparing pure platinum slurry with electrode platinum granule diameter being 1-15 micrometers, slurry solid content being 40-80 percent and viscosity coefficient being 30-60kcps; B. filling the pure platinum slurry into a pin case of a micro point gum machine and respectively coating one electrode at two corresponding sides of the inner surface of a canular zirconium dioxide basal body of the oxygen sensor through the micro point gum machine; C. placing the canular zirconium dioxide basal body of the oxygen sensor coated with an inner platinum electrode film in a high temperature sintering furnace and sintering the canular zirconium dioxide basalbody for 4-7 hours at the temperature of 1400-1600 DEG C. The invention has the advantages of controllable coating speed, accurate coating and positioning and effective production cost saving; in addition, the oxygen sensor produced by the invention has the advantages of good reproducibility of output signals, low break ratio and high degree of automation.

The invention discloses a three-parameter intelligent compensation and correction electrochemical online dissolved oxygen sensor that comprises a dissolved oxygen electrode, a conductivity sensor, anatmospheric pressure sensor, a temperature electrode, a detected water sample flow cell, a sensor bracket and a detection circuit unit, wherein the dissolved oxygen electrode comprises a shell of thesensor, an oxygen permeation membrane, a membrane cover, a gold electrode, a silver electrode, a platinum electrode, a liquid reaction electrolyte, an electrode base and insulated wires; the dissolvedoxygen electrode, the conductivity sensor, the atmospheric pressure sensor and the temperature electrode are respectively connected to the detection circuit unit through insulated wires for signal processing; the detection circuit unit comprises a polarization voltage circuit, a dissolved oxygen signal detection circuit, a conductivity, atmospheric pressure and temperature compensation circuit, aserial port communication circuit and the like. The conductivity, the atmospheric pressure and the temperature influencing the dissolved oxygen detection concentration are compensated and calibratedat the same time, the detection accuracy is greatly improved, the response speed is high, the precision is high, the service life is long, and the stability is good.

The invention discloses a single-molecule field effect transistor based on supramolecules and a preparation method thereof, and belongs to the field of field effect transistors. The device is composed of a graphene array point electrode, platinum grid electrodes, a supramolecular heterojunction and ionic liquid, wherein the platinum grid electrodes are positioned on two sides of the graphene array point electrode and are in non-conductive contact with the graphene array point electrode; and the molecular heterojunction is connected with the graphene array point electrode through an amido bond. Cucurbituril is selected as a host molecule, amethyst molecules, styrene derivatives, anthracene derivatives and the like are selected as guest molecules, and research shows that the supramolecular system can be obtained by assembling through interaction of the host and the guest. The technical effect of the invention is that the graphene nanoelectrode and the functional material molecules are directly bonded together through the amide covalent bond, a single-molecule field effect transistor can be constructed, and the switching function can be realized.

The invention discloses a preparation method and application of a microneedle electrode. The preparation method comprises the following steps: preparing a silver wire microneedle electrode and a platinum wire microneedle electrode; loading a layer of silver chloride on the surface of the silver wire microneedle electrode in a potassium chloride solution through constant potential electrodepositionto obtain a silver-silver chloride microneedle electrode; preparing a dopamine aqueous solution and an ammonia aqueous solution, and preparing polydopamine spheres; preparing a noble metal saline solution, and adding the polydopamine spheres into the cooled noble metal saline solution to prepare a polydopamine sphere-noble metal composite material; modifying the platinum wire microneedle electrode with the polydopamine sphere-noble metal composite material, and applying the product to cell and tumor tissue detection. In-vivo detection of the electrode can be effectively achieved, the total amount of Au participating in electrode reaction is increased through polydopamine, gold nanoparticles have good electrocatalytic properties, and the electrode detection sensitivity can be improved through the synergistic effect of the gold nanoparticles and the polydopamine.

The invention discloses a system for anodic oxidation reaction. The system comprises a reaction container, the reaction container is connected with a constant potential rectifier, and the constant potential rectifier is connected with a computer; electrolyte is contained in the reaction container, a platinum gauze electrode is arranged in the electrolyte and is connected with an auxiliary electrode of the constant potential rectifier, a reference electrode of the constant potential rectifier is soaked in the electrolyte, and a work electrode of the constant potential rectifier is in linkage with a sample. According to the designed system, the constant potential rectifier exerts voltage between the platinum gauze cathode and the anode of the RB-SiC sample to drive hydroxide radical (OH-) in the electrolyte to move to the RB-SiC surface and oxidize the RB-SiC surface, under the driving of voltage, the hydroxide radical (OH-) penetrates through an oxidation layer and moves into RB-SiC interior to continue oxidation, and therefore the thickness of the oxidation layer is continuously increased. The reference electrode monitors the potential change of the region around the oxidation surface and converts the potential change into current data, and therefore oxidation currents in the oxidation region can be monitored in real time.

The invention relates to the technical field of oxygen sensors, in particular to a vehicle oxygen sensor with quick response and strong anti-interference capability. The vehicle oxygen sensor comprises a swirling gas flow inlet mode, on one hand, the flow speed of the swirling gas inlet mode is relatively high, the response speed of the sensor is increased conveniently, and on the other hand, unstable gas is disturbed to be mixed in the swirling gas inlet process, and the influence of unstable gas flow disturbance is reduced; a fusion additive raw material is added into the electrode platinumslurry, so that the catalytic electrode layer and the blank body are firmly attached into a whole; high overall strength, sintering in four different stages; in the sintering process, the temperaturerises slowly in a stepped manner; blank body heating uniformity is realized, in addition, the matrix ceramic material does not generate obvious sintering shrinkage, no crack is generated in the ceramic, the raw material of the catalytic layer can be sintered at a relatively low temperature due to the ultrafine powder, and the matrix material does not generate sintering shrinkage at the moment, sothat the surface of the catalytic layer of the material can be ensured to have more catalytic interfaces to the greatest extent.

The invention discloses a p-benzoquinone detection and analysis method based on a photoelectric cathode sensor, which comprises the following steps: constructing a photoelectrochemical three-electrode system comprising a xenon lamp light source, a Cu3SnS4/ZnO/ITO working electrode, a platinum wire counter electrode and an Ag/AgCl reference electrode; the method comprises the following steps: adding p-benzoquinone solutions with different concentrations into a photoelectrochemical three-electrode system under the condition of switching on, and drawing I-T curves of the three-electrode system in the p-benzoquinone solutions with different concentrations under a set voltage range; and obtaining a p-benzoquinone quantitative detection standard curve according to the I-T curve, and carrying out trace analysis on an actual water sample. The photoelectric cathode sensor disclosed by the invention not only is low in preparation cost and convenient to operate, but also has the characteristics of high sensitivity and wide detection range on detection and analysis of p-benzoquinone, and can be applied to trace analysis of p-benzoquinone in an actual water sample.

The invention relates to the field of chemical slurry material, and specifically relates to oxygen sensor inner electrode platinum slurry, and a preparation method and an application thereof. The oxygen sensor inner electrode platinum slurry is composed of, by weight: 71-79% of platinum-coated zirconium powder, 14.7-16.7% of an organic solvent, and 6.3-8.3% of an organic adhesive. The preparation method comprises the steps that: the platinum-coated zirconium powder, the organic solvent, and the organic adhesive are added into a flask according to the ratio; and heating and stirring is carried out, such that cellulose is dissolved and the platinum-coated zirconium powder is uniformly mixed into a platinum slurry, wherein a heating temperature is 75-85 DEG C. The sensor manufactured by using the platinum slurry has stable electrical properties. Especially, a maximum voltage of the sensor can be 0.98V. Response speed is fast.

The invention discloses a novel electrochemical polishing device and method. The novel electrochemical polishing device comprises an electrolytic bath, an electrolyte graphite electrode, a platinum electrode, a fixed movable seat and a heating magnetic stirrer, wherein a magnetic rotor is arranged at the top of the heating magnetic stirrer; the graphite electrode and the platinum electrode are both located in the electrolytic bath; the negative electrode of a power supply is electrically connected with the graphite electrode; the positive electrode of the power supply is electrically connected with the platinum electrode; the fixed movable seat is used for fixing the graphite electrode and the platinum electrode and adjusting the distance between the graphite electrode and the platinum electrode; and the heating magnetic stirrer, a temperature sensor and the magnetic rotor are used in cooperation to control the temperature of the electrolyte and stir the electrolyte contained in the electrolytic bath. After the device and the method are adopted, the surface polishing uniformity of a workpiece is further improved, a tungsten workpiece with uniform roughness and brightness is obtained, the surface quality of the workpiece is improved, and the tungsten workpieces of different sizes can be machined.

The invention provides a novel electrolyte solution to detect hexavalent chromium via a mercury film electrode and a method to detect hexavalent chromium via the electrolyte solution. The electrolytesolution comprises acetic acid-sodium acetate buffered solution having the concentration of 0.2-2 mol/L, DTPA (diethylenetriaminepentaacetic acid) having the concentration of 10-60 g/L, sodium nitrate, potassium nitrate or their mixed solution having the concentration of 1-4 mol/L, and sodium chloride, potassium chloride or their mixed solution having the concentration of 0.1-1 mol/L. The method includes 1, mixing electrolyte and a water sample containing hexavalent chromium to be detected in a volume ratio of 1:10 to 1:1; 2, connecting a glassy carbon electrode, reference electrode and platinum electrode system pre-coated with mercury film to a heavy metal detector, inserting in mercury plating liquid containing Hg2+, and treating the applied glassy carbon electrode to reveal mercury filmfrom the surface; 3, washing the electrode system, inserting the electrode system into the electrolyte and connecting with the heavy metal detector, applying different enrichment potentials continuously twice for 10-120 s, and scanning under the frequency range of 0.9 v to 1.5 v.

The invention relates to a surface modification method of a titanium substrate for a fuel cell, which comprises the following steps of: performing ultrasonic treatment on the titanium substrate in alkali liquor, acid liquor, deionized water and an organic solvent in sequence, drying the titanium substrate, and putting the titanium substrate into a vacuum box; in acidic AlCl3-BMIC ionic liquid, using the treated titanium substrate as an anode, using aluminum as a counter electrode, using platinum as a reference electrode, carrying out anode activation, and drying after cleaning with an organic solvent; in [BMIM] BF4-CuCl2 ionic liquid, using activated titanium substrate as a cathode, using copper as an anode, and carrying out electro-deposition copper plating; and in a KCl solution containing graphene, carrying out graphene oxide deposition on the copper-plated titanium substrate. The titanium substrate is treated through the anode activation technology, an oxidation film on the titanium surface can be effectively removed, and a fresh titanium surface is obtained; a compact copper plating layer is pre-plated on the titanium substrate, so that the surface of activated titanium is protected, and meanwhile, the binding force of the substrate and a subsequent graphene coating is ensured; the titanium substrate is subjected to surface modification in a plating electro-deposition mode, and the process is simple and easy to operate.

The invention discloses a carbon nanofiber/lithium titanate composite electrode material as well as a preparation method and application thereof. The preparation method specifically comprises the following steps of: (1) taking a copper sheet as a positive electrode and a platinum sheet as a negative electrode, soaking the positive electrode and the negative electrode in a copper sulfate aqueous solution, and preparing copper nanoparticles by an electro-deposition method; (2) preparing carbon spiral nanofibers by taking the copper nanoparticles as a catalyst and acetylene as a carbon source through a plasma chemical vapor deposition method; (3) by taking the carbon spiral nanofibers as a carrier and titanium tetrachloride and deionized water as reaction sources, depositing a layer of uniform titanium dioxide on the surfaces of the nanofibers by utilizing an atomic layer deposition means; and (4) placing a product in a lithium hydroxide solution, carrying out hydrothermal reaction, and carrying out heat treatment in an argon atmosphere. According to the prepared carbon spiral nanofiber/lithium titanate composite material, the lithium titanate nanosheets are compounded on the surfaces of the carbon spiral nanofibers, a core-shell cross-linked porous structure is formed, high energy, high power density and long cycle life are achieved; and the preparation method is simple, convenient and easy to control.

The invention discloses an electrocoagulation guide wire system used for arterial aneurysm embolism. The electrocoagulation guide wire system comprises a power supply, a positive electrode hypotube and a positive electrode platinum-iridium ring, wherein a PTFE inner insulating layer is arranged between the positive electrode hypotube and the positive electrode platinum-iridium ring, a positive electrode conductive wire is arranged in the PTFE inner insulating layer, two ends of positive electrode conductive wire are electrically connected with the positive electrode hypotube and the positive electrode platinum-iridium ring, a negative electrode hypotube and a negative electrode HHS tube are fixedly connected to the outer side of the PTFE inner insulating layer, the positive electrode conductive wire is connected with the positive electrode of the power supply, both the negative electrode hypotube and the negative electrode HHS tube are connected with the negative electrode of the powersupply, the negative electrode HHS tube and the negative electrode hypotube are fixedly connected through welding, same first epoxy glue is arranged between the positive electrode hypotube and the negative electrode hypotube, the outer sides of the positive electrode hypotube and the negative electrode hypotube are fixedly connected with one same first PET heat shrinkable tube, and the outer sideof the first PET heat shrinkable tube is fixedly connected with a PTFE heat shrinkable tube. The electrocoagulation guide wire system is easy to operate, and convenient in use and treatment, and theuse requirements can be satisfied.