34results about How to "Electrode performance is stable" patented technology

The present invention is structure, composition and manufacture of electrically catalytic hydrogen separating electrode. The structure of the electrically catalytic hydrogen separating electrode consists of fluid collecting layer and catalyzing layer compounded together. The catalyzing layer has mixed catalyst powder and adhesive, and may have also conducting powder. The electrically catalytic hydrogen separating electrode in completely new structure has the features of high hydrogen separating catalyzing activity, stable performance, long service life, etc. and may be used widely in chloralkali industry, water electrolyzing industry, solar water electrolyzing hydrogen production, electrochemical hydrogen storing, hydrogen making system, etc.

The invention discloses a photocatalytic electrode responding to visible lights and an application thereof on chromium-containing wastewater treatment. The preparation method of the photocatalytic electrode comprises the following steps: impregnating a TiO2-NTs electrode in a KI solution for 2 to 2.5 hours, taking out the TiO2-NTs electrode, impregnating the TiO2-NTs electrode in an AgNO3 solution with a pH value of 10.5 to 11.5 for 2 to 2.5 hours, washing the prepared electrode with deionized water, drying in the air, then soaking the electrode in a Bi(NO3)3 solution for 0.5 to 1 hour, taking out the electrode, drying in the air, and calcinating the electrode in a muffle furnace for 2 to 2.5 hours so as to obtain the Bi2O3 / AgI / TiO2-NTs electrode. The application of the electrode on a chromium-containing wastewater treatment comprises the following steps: adding wastewater containing hexavalent chromium into a reactor taking the Bi2O3 / AgI / TiO2-NTs electrode as the work electrode and Pt as the counter electrode, adjusting the reaction pH value by using an inorganic acid, stirring in the absence of light so as to ensure the absorption balance on the electrodes, applying a work voltage, and starting a light source to irradiate the system so as to carry out reactions. A photocatalytic electrode responding to visible lights is utilized, at the same time a certain amount of anode deflecting voltage is applied on the electrode so as to treat Cr(VI) through a photoelectric synergetic effect, and the treatment has the advantages of good treatment effect, rapid speed, and low cost.

The invention relates to a preparation method of a graphene / polyaniline composite anode. The preparation method comprises the following steps: uniformly mixing 1-20g of graphene, 50-150g of aniline and 500-1000ml of 2mol / L hydrochloric acid, then adding 1-10g of ammonium persulfate, stirring and reacting for 1-3h at the temperature of 0-4 DEG C, respectively filtering and washing the reaction product with 3% by weight of hydrochloric acid and distilled water for three times respectively, drying at the temperature of 80 DEG C, grinding into scales, mixing the ground product with an adhesive and an organic solvent at a ratio of 70: 20: 10-80, then performing ultrasonic vibration treatment for 30min, stirring till the mixture is sticky, thus obtaining an electrode coating; and pulling many times by adopting a pulling method, coating an electrode coating layer on the surface of a titanium plate, drying for 3-7h at the temperature of 120-150 DEG C, and preparing the composite anode. The preparation method disclosed by the invention has simple process, and the prepared electrode has the advantages of stable performances, low cost and good conductive performance.

The invention discloses a biosensor for detecting escherichia coli. The biosensor orderly comprises a gold electrode, a glutaraldehyde-escherichia coli antibody layer, a bovine serum albumin sealing layer, an escherichia coli layer and a RCA product layer from inside to outside. The invention discloses a preparation method of the biosensor. The biosensor has stable electrode performances, good repeatability and a detection limit of 1.6*10cfu mL(-1).

The invention discloses an advanced treatment method for DIoscoreazingiberensis C.H.Wright wastewater, which takes a boron-doped diamond film BDD electrode as an anode and stainless steel as a cathode to perform an advanced treatment on biologically-treated dioscoreazingiberensis C.H.Wright wastewater via an electrochemical oxidation method, the biologically-treated dioscoreazingiberensis C.H.Wright wastewater is obtained from the process (disclosed in the patent with a patent publication number of CN1789171A) combining neutralization, hydrolysis acidification, desulfuration, methane fermentation, I-BAF-1 and I-BAF-2. The persistent organic pollutants in the biologically-treated dioscoreazingiberensis C.H.Wright wastewater can be effectively removed under the operation conditions of a current density of 30mA cm<-2>, a pH value of 7.75 and the addition of 0.1M supporting electrolyte Na2SO4. The COD content in the biologically-treated dioscoreazingiberensis C.H.Wright wastewater is reduced to 97.4mg / L from 281.8mg / L, meeting the national discharge standard of class I, and the energy consumption is 13.44kWhm <-3>. The method has the advantages of high oxidation capacity, excellent treatment effect, low energy consumption, low controllability and high potential in industrial application.

The invention provides an electrochemical method for determining nicotine content in tobacco and tobacco-related products. The method comprises the following steps: 1) performing acidolysis on tobaccoand tobacco-related products, filtering, and adding an electrolyte into the filtrate to obtain a sample solution; 2) adding the nicotine standard sample into an electrolyte to dilute and fix the volume to obtain a standard solution; 3) dropwise adding acid into the selected electrode, and performing electrochemical treatment by adopting cyclic voltammetry to obtain a pretreated working electrode;and 4) dropwise adding the sample solution and the standard solution to a working electrode for square wave voltammetry determination, and calculating the content of nicotine in the sample solution through a standard curve method. The electrochemical method for determining nicotine content in tobacco and tobacco related products provided by the invention is simple in preparation process, stable in electrode performance, good in reproducibility, low in detection cost, high in detection speed and high in detection accuracy.

The invention belongs to the environment protection field and discloses a method and a device for treating pollutant and dust in gas. The method is electrochemical means, solution-electrode is adopted as reaction system, gas is guided into the solution-electrode reaction system, and electrolysis reaction is carried out to degrade pollutant. The adopted electrode is a three-dimensional foam electrode with openings, and foam filler is filled between anode and cathode. The invention also provides a device applicable to the method, liquid cycle and effective distribution are adopted, so that gas and liquid can be effectively distributed and mixed on the surface of the three-dimensional electrode, effective area of reaction is greatly increased, and gas purification efficiency is improved.

The invention discloses a carbon-based binder-free composite material as well as a preparation method and application thereof, and belongs to the technical field of carbon material preparation. The carbon-based binderless composite material comprises a matrix, a carbon film and structural carbon. The carbon film is loaded on the surface of the matrix, and the structural carbon integrally formed with the carbon film grows on the carbon film. Alkali metal and alkaline earth metal catalysts are added in the preparation process, so that a carbon source is deposited on the surface of the matrix toform an integrally formed carbon film and structural carbon, the use of a binder is avoided, the effective specific surface area of the composite material is increased, the bonding strength and electrical contact performance of the carbon material and the matrix are improved, the electron, ion and atom transmission and chemical structure characteristics of the surface of the material are modified,and the composite material with excellent physical and chemical properties is prepared. The composite material prepared by the invention can be used for various battery electrodes, capacitor electrodes, various sensor electrodes, solar cell electrodes, water electrolysis hydrogen production electrodes, hydrogen storage materials, catalysts, catalyst carriers, composite material reinforcing materials and the like.

The invention relates to a Ti / carbon aerogel / MnO2 electrode and a preparation method thereof, and applications. The preparation method includes the following steps: S1, performing pretreatment on a porous titanium substrate to remove surface oil stains and oxide films; S2, mixing resorcinol, formaldehyde and water, uniformly stirring the mixture, adding NaMnO4, and performing continuous stirring after the NaMnO4 is dissolved so that a mixed solution can be obtained; S3, pouring the porous titanium substrate treated by the S1 and the mixed solution obtained by the S2 into a mould, and adjustingthe pH of the solution; S4, placing the mould of the S3 into a thermostat water bath to stand for gelation, performing aging in the thermostat water bath, and obtaining a Ti / phenolic resin / MnO2 wet gel after the mould is removed; and S5, soaking the Ti / phenolic resin / MnO2 wet gel obtained by the S4 in an organic solvent with small surface tension, obtaining a dry aerogel after drying, placing thedry aerogel in an inert atmosphere to perform carbonization, and obtaining the Ti / carbon aerogel / MnO2 electrode by cooling. The preparation method is simple, and the prepared electrode has long service life and is environmentally friendly and pollution-free.

The invention discloses a chemical treatment method, and in particular relates to an advanced treatment or recycling method for naphthalene series dye intermediate production wastewater. The method is suitable for the advanced treatment or recycling of beta-naphthol wastewater subjected to biochemical-physicochemical treatment. In a single-chamber reactor in which a dimensionally stable anode (DSA) electrode is taken as a cathode material, a stainless steel sheet with the same size as the DSA electrode is taken as a cathode and a distance between electrodes is 1cm, 1.0 to 5.0 weight percent of particle electrode material is added and the wastewater is treated for less than 1 hour under the conditions that current density is 20 to 50mA cm<-2> and pH is 3 to 11. The method has the advantages that: the oxidation capacity and corrosion resistance are high, the treatment effect is good, treatment time is short, pollution is avoided, and the like. The method can be widely applied to dye production enterprises.

The invention relates to field of medical instruments and electrochemistry, particularly to a silver / silver chloride powder electrode. The silver / silver chloride powder electrode comprises a silver / silver chloride material, an insulating material, a silver wire, a welding point, a circular hole and a guide wire, wherein the silver wire is fixed on the silver / silver chloride material, the silver wire and the guide wire are welded together to form the welding point, and the circular hole is formed between an electrode material and the insulating material when the insulating material is used for filling. The invention also relates to preparation of the silver / silver chloride material. The silver / silver chloride powder electrode has the benefits: 1, the silver / silver chloride material can be processed into any shapes; 2, the electrode is not easy to polarize; 3, the property of the electrode is stable; and 4, the electrode adopts a porous structure, so that the surface properties of any electrode layers are the same.

The invention provides a rhodium oxide-nano porous nickel (Rh2O3@NPNi) composite electrode capable of detecting formaldehyde and a preparation method thereof. According to the preparation method, a nano-porous nickel electrode is prepared by adopting a template method, and rhodium oxide is modified on the surface of the porous nickel electrode to obtain a rhodium oxide-nano-porous nickel compositeelectrode. The electrode has a three-dimensional ordered nano-porous nickel and high-catalytic-activity flaky rhodium oxide composite structure, so that gas transmission channels are increased, and the sensitivity and the response speed of the electrode to formaldehyde are improved. The composite electrode is stable in structure, transmission of electrons is not hindered by an interface between amodification material and the electrode, and the composite electrode can be used for rapid detection of trace pollutant formaldehyde and can be used for a portable formaldehyde detection sensor.

A gas diffusion electrode assembly comprising: a gas diffusion electrode; and a metallic or resinous edging material bonded to a peripheral part of the electrode. The invention also relates to a gas diffusion electrode assembly comprising: a gas diffusion electrode; and a metallic terminal bonded to the electrode. The invention further relates to a gas diffusion electrode assembly comprising: a gas diffusion electrode; and a structure for connection, which comprises a combination of a thin silver sheet and a reinforcing material comprising a tough metal as a base, the structure for connection being bonded to a peripheral part of the gas diffusion electrode. Also disclosed are processes for producing these gas diffusion electrode assemblies.

The present invention provides an alpha type SiC-beta SiC combination type reaction sintered SiC material, a preparing method and a two-body plasma cathode using the material, especially to an alpha type SiC-beta SiC combination type reaction sintered beta type SiC material used for semiconductor engineering components and a preparing method thereof, wherein the method comprises the following steps: obtaining the alpha type SiC powder through normal-pressure or pressure sintering, mixing the carbon powder with the alpha type SiC powder for obtaining carbon-alpha type SiC mixture, and after heating the carbon-alpha type SiC mixture for forming, reacting with the fused silicon in a vacuum high-temperature environment for obtaining the beta-type SiC material with the electric resistance which satisfies the electric characteristic. The invention also provides the two-body plasma cathode which has a silicon-SiC structure and a flat or a certain-degree profile funnel shape and has a drop height.

A gas diffusion electrode assembly comprising: a gas diffusion electrode; and a metallic or resinous edging material bonded to a peripheral part of the electrode. The invention also relates to a gas diffusion electrode assembly comprising: a gas diffusion electrode; and a metallic terminal bonded to the electrode. The invention further relates to a gas diffusion electrode assembly comprising: a gas diffusion electrode; and a structure for connection, which comprises a combination of a thin silver sheet and a reinforcing material comprising a tough metal as a base, the structure for connectionbeing bonded to a peripheral part of the gas diffusion electrode. Also disclosed are processes for producing these gas diffusion electrode assemblies.

The invention relates to a method for preparing a composite cotton fabric electrode for a flexible supercapacitor. Cotton fabric is steeped into a disperse solution with negative and positive iron mixed surfactants, carbon nano tubes and organic monomers, after ultrasonic treatment is conducted on the solution, an oxidizing agent solution are added to the solution in a dripping mode, the solution is mixed at the same time, and the mixed solution is placed in an ice-water bath to react. According to the method for preparing the composite cotton fabric electrode for the flexible supercapacitor, a one-step and one-bath method is adopted, the surfactants serve as a soft template, the carbon nano tubes serve as a hard template, and the composite cotton fabric electrode of a three-dimensional net-shaped structure is constructed in an in-situ mode. The method for preparing the composite cotton fabric electrode for the flexible supercapacitor is simple in technology, the composite cotton fabric electrode can be directly applied to natural fibers, a prepared composite material has the high specific capacitance and the stable cycle performance, and the method has good application and development prospects in the aspect of portable and foldable flexible electronic and energy devices.

The present invention relates to a kind of Ti / FeMoO 4 The preparation method of the electrode includes: S1, pretreating the porous titanium substrate; S2, the preparation of Ti / Fe(OH)F: ferric salt, soluble fluoride, small molecule template agent, and hydrazine in a ratio of 1: 2.0~3.5:4~8:5~10 molar ratio dissolve in water, stir evenly; transfer the mixed solution to the reaction kettle, and S1 pretreated porous titanium, stir with a mechanical stirrer for 20min, then transfer to a certain temperature T1 In an oven, react for 3-7 hours; after cooling, take out the titanium sheet, wash it with water, and dry it in vacuum for 2 hours; S3, Ti / FeMoO 4 Preparation: Weigh a certain amount of Na 2 MoO 4 2H 2 O dissolved in water, the Ti / Fe(OH)F prepared by S2 was mixed with Na 2 MoO 4 Transfer the solution to the reaction kettle together, stir it with a mechanical stirrer for 10 minutes, seal it and put it in a drying oven, and react it at a certain temperature T2 for a certain period of time; after cooling down to room temperature, take out the porous titanium and vacuum dry it for 2 hours to obtain Ti / FeMoO 4 electrode. The electrode prepared by the invention has a multi-level structure, its preparation method is green and simple, and it is used as a cathode to treat organic wastewater with good decontamination effect.

The invention relates to a multi-component graded Cu@CuMoO 4 / Ti nanorod electrode preparation method, comprises the following steps: S1, the porous titanium substrate is carried out pretreatment; S2, the preparation of Cu@Cu(OH)F / Ti: divalent copper salt, soluble fluoride, small The molecular template agent and hydrazine are dissolved in water at a molar ratio of 1:2.0~3.5:4~8:5~10, and stirred evenly; the mixed solution is transferred to the reaction kettle, and the porous titanium pretreated by S1 is mixed with a magnetic stirrer After stirring for 20 minutes, transfer it to an oven at a certain temperature T1, and react for 3-7 hours; after cooling, take out the titanium sheet, wash it with water, and dry it in vacuum for 2 hours; S3, Cu@CuMoO 4 / Ti nanorod preparation: Weigh a certain amount of Na 2 MoO 4 2H 2 O dissolved in water, Cu@Cu(OH)F / Ti prepared by S2 and Na 2 MoO 4 The solution was transferred to the reaction kettle together, stirred with a magnetic stirrer for 10 minutes, sealed and placed in a dry box, and reacted at a certain temperature T2 for a certain period of time; after cooling down to room temperature, the porous titanium was taken out and vacuum-dried for 2 hours to obtain Cu@CuMoO 4 / Ti nanorod electrodes.

The invention belongs to the environment protection field and discloses a method and a device for treating pollutant and dust in gas. The method is electrochemical means, solution-electrode is adopted as reaction system, gas is guided into the solution-electrode reaction system, and electrolysis reaction is carried out to degrade pollutant. The adopted electrode is a three-dimensional foam electrode with openings, and foam filler is filled between anode and cathode. The invention also provides a device applicable to the method, liquid cycle and effective distribution are adopted, so that gas and liquid can be effectively distributed and mixed on the surface of the three-dimensional electrode, effective area of reaction is greatly increased, and gas purification efficiency is improved.

The invention provides a method for recovering simple substance phosphorus from hypophosphite wastewater. According to the method, a Pd / g-C3N4 electrode is taken as a cathode for establishing a photoelectrocatalysis reaction system, a photoelectric synergistic effect is utilized for enhancing electron migration and improving generation amount of active hydrogen, hypophosphite radicals are catalytically reduced at the cathode, and a reduction product in the form of simple substance phosphorus is recovered from the hypophosphite wastewater. The method provided by the invention is capable of obtaining a recovery product with a high phosphorus yield up to 70% or more. The reduction product exists in the form of simple substance phosphorus, so that a large amount of chemical pollution is avoided and secondary pollution is reduced, and also the reduction product does not contain heavy metals or other impurities and can be directly applied to processing and utilization of phosphorus-containing products. The Pd / g-C3N4 electrode has stable performance and is reusable, so the method does not need a large amount of an agent during recovery of simple substance phosphorus, the usage amount of the agent is reduced and the usage rate of the agent is improved. The provided method is simple to operate and suitable for large-scale industrial production.

The present invention discloses an advanced treatment method for DIoscoreazingiberensis C.H.Wright wastewater, which takes a boron-doped diamond film BDD electrode as an anode and stainless steel as a cathode to perform an advanced treatment on biologically-treated dioscoreazingiberensis C.H.Wright wastewater via an electrochemical oxidation method, the biologically-treated dioscoreazingiberensis C.H.Wright wastewater is obtained from the process (disclosed in the patent with a patent publication number of CN1789171A) combining neutralization, hydrolysis acidification, desulfuration, methane fermentation, I-BAF-1 and I-BAF-2. The persistent organic pollutants in the biologically-treated dioscoreazingiberensis C.H.Wright wastewater can be effectively removed under the operation conditions of a current density of 30mA cm<-2>, a pH value of 7.75 and the addition of 0.1M supporting electrolyte Na2SO4. The COD content in the biologically-treated dioscoreazingiberensis C.H.Wright wastewater is reduced to 97.4mg / L from 281.8mg / L, meeting the national discharge standard of class I, and the energy consumption is 13.44kWhm <-3>. The method has the advantages of high oxidation capacity, excellent treatment effect, low energy consumption, low controllability and high potential in industrial application.

The invention relates to a preparation method of a Ti / FeMoO4 electrode. The preparation method comprises the following steps: S1, preprocessing a porous titanium substrate; S2, preparing Ti / Fe(OH)F: dissolving a ferrous salt, a soluble fluoride, a micromolecular template and hydrazine in water according to a molar ratio of 1:(2.0-3.5):(4-8):(5-10), performing uniform stirring, transferring the obtained mixed solution into a reaction kettle, adding the pretreated porous titanium obtained in step S1, performing stirring for 20 min by using a mechanical stirrer, transferring the obtained mixtureinto an oven having a certain temperature of T1, performing a reaction for 3-7 h, taking out the obtained titanium sheet after cooling, washing the titanium sheet with water, and carrying out vacuum drying for 2 h; and S3, preparing Ti / FeMoO4: weighing a certain amount of Na2MoO4.2H2O, dissolving the Na2MoO4.2H2O in water, transferring the Ti / Fe (OH) F prepared in step S2 and the obtained Na2MoO4solution into the reaction kettle, performing stirring for 10 min by using the mechanical stirrer, sealing the reaction kettle, placing the reaction kettle in a drying box, performing a reaction at acertain temperature of T2 for a certain time, cooling the obtained reaction product to room temperature, taking out the obtained porous titanium, and carrying out vacuum drying for 2 h to obtain the Ti / FeMoO4 electrode. The electrode prepared in the invention has a multistage structure, the preparation method is green and simple, and the electrode has a good decontamination effect when used as a cathode for treating organic wastewater.

The invention discloses a preparation method of a carbon-copper foam material and a method for using it as a working electrode to detect formaldehyde in environmental water bodies. After the graphene oxide impregnation solution was prepared by the improved hummers method, the rectangular copper foam material was immersed in it and then dried and heated and annealed at high temperature under anaerobic conditions to obtain a carbon-copper foam material as a highly sensitive formaldehyde sensor. The carbon-copper foam material was adopted The material is used as the working electrode, Ag / AgCl is used as the reference electrode, and platinum wire is used as the counter electrode. The linear regression equation corresponding to the formaldehyde and the characteristic response current value is drawn by cyclic voltammetry, and the measurement The characteristic response current value of the pretreated environmental water body to be tested is substituted into the linear regression equation, and the formaldehyde concentration in the water body sample is obtained by calculation. The electrode of the formaldehyde sensor provided by the invention has stable performance and good reproducibility, and the formaldehyde analysis speed in the environmental water body is fast and the detection cost is low.

The invention discloses a nano-sheet flower-like sodium vanadium oxyphosphate electrode material, a preparation method thereof, and an application as a positive electrode material of a sodium ion battery. The method comprises: preparing a nano-sheet flower-like powder precursor through hydrothermal treatment, and then performing centrifugation, After washing and drying, two-step heat treatment is used to obtain the nano-sheet flower-shaped sodium vanadium oxyphosphate electrode material. The morphology and structure of the material are well maintained, and it is a micron-scale flower-shaped composition composed of nano-sheets. The specific surface area provides more reactive active sites for the electrochemical reaction of the positive electrode material during the charge and discharge process. At the same time, the surface of the material is coated with a thin carbon layer, which improves the electron transport rate of the positive electrode material, thereby accelerating the reaction kinetics of the composite material. The material has excellent rate performance and cycle life as a cathode material for sodium-ion batteries.

The invention discloses a biosensor for detecting Escherichia coli, which consists of a gold electrode, a glutaraldehyde-Escherichia coli antibody layer, a bovine serum albumin sealing layer, an Escherichia coli layer and an RCA product layer from the inside to the outside. In the preparation method of the sensor, the biosensor electrode provided by the invention has stable performance, good repeatability, and a detection limit of 1.6×10 cfu mL‑1.