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 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.

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.