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32 results about "Electrochemical adsorption" patented technology
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Production of novel carbon silica aerogel electrode and uses thereof
InactiveCN101492158ALarge specific surface areaImprove conductivityCell electrodesPorosityTreatment effect
The invention relates to preparation and application of a novel carbon aerogel electrode. The preparation adopts a synthetic routine of sol-gel-phenolic aldehyde polymerization, normal-temperature drying, high-temperature carbonization and carbon dioxide activation to prepare carbon aerogel, and uses the carbon aerogel as a working electrode in electrical adsorption technology. The prepared carbon aerogel has the advantages of high porosity, large specific surface area, high conductivity, controllable appearance and shape, and the like, and the carbon aerogel with large specific surface area is very suitable for processing environmental pollutants through electrochemical adsorption. Due to strong adsorption performance and good conductivity, the carbon aerogel has wide concentration range for removing the pollutants (between 0.1 and 100mmol / L) and has the same high-efficiency removal effect for low-concentration wastewater (of which the concentration is less than 4mmol / L) under the electrochemical strengthening function, and the removal rate can be improved by more than 3 times compared with the single adsorption function. The process has simple and convenient operation and good treatment effect on pollutant wastewater, is novel high-efficiency and energy-saving technology, and has great application value in the field of wastewater treatment.
Owner:TONGJI UNIV
Preparation method of carbon aerogel load titanium dioxide electrodes and application thereof
InactiveCN101549895APromote degradationGood photocatalytic effect assisted by electrosorptionWater/sewage treatment by irradiationChemical industryPorosityWater processing
The invention belongs to the technical field of water processing, in particular relates to a preparation method of carbon aerogel load titanium dioxide electrodes and application thereof. The specific steps are as follows: preparation of carbon aerogel, preparation of butyl carbonate sol, load and sintering of butyl carbonate sol gel, thereby obtaining required product. The electrode has the advantages of high porosity, big specific surface, high electrical conductivity, controlled face shaping, strong photocatalytic activity, and the like, and is applied to processing high-chroma dye waste water by electrochemical absorption fill light catalytic degradation. The CA / TiO2 in the invention has good electric absorption performance and photocatalytic activity; with the auxiliary strengthening effect of electric absorption, the concentration range of colored dye waste water degradation removal is wide (100 mg / L to 1000 mg / L); and the removing speed can be improved more than 3 times compared with photocatalytic degradation. The technology has simple and convenient operation and good processing effect for pollutant waste water, is a high-efficient and energy-saving new technology, and has very great application value in the field of waste water processing.
Owner:TONGJI UNIV
Polyacrylonitrile porous carbon fiber preparation method
InactiveCN106435841ALarge specific surface areaGood flexibilityFibre chemical featuresCarbon fibersPorous carbon
The invention discloses a polyacrylonitrile porous carbon fiber preparation method. The method comprises the steps of 1, preparing PAN / PS solution, 2, conducting electrostatic blowing to spin the PAN / PS as-spun fiber, 3, conducting the pre-oxidation processing of the as-spun fiber, 4, carbonizing the pre-oxidated fiber. The method is characterized in that the PAN / PS as-spun fiber is spun under the collective functions of both the electrostatic drawing and the air flow drawing, thus not only accelerating the spinning speed, but also let the fiber acquire a higher degree of orientation in the fiber forming process. The acquired as-spun fiber has good conical structure, and is a highly efficient preparation method of Polyacrylonitrile porous carbon fiber. The Polyacrylonitrile porous carbon fiber prepared by using the method has the advantages of being fluffy, having porous beehive structure, having high specific surface area and the like, and can be broadly applied in the application such as electrochemistry, adsorption, catalyst and hydrogen storage.
Owner:TIANJIN POLYTECHNIC UNIV
Mesoporous nanocrystalline film architecture for capacitive storage devices
ActiveUS20120026644A1Without energy densityHigh rateNanotechHybrid capacitor electrodesCapacitanceCapacitive storage
A mesoporous, nanocrystalline, metal oxide construct particularly suited for capacitive energy storage that has an architecture with short diffusion path lengths and large surface areas and a method for production are provided. Energy density is substantially increased without compromising the capacitive charge storage kinetics and electrode demonstrates long term cycling stability. Charge storage devices with electrodes using the construct can use three different charge storage mechanisms immersed in an electrolyte: (1) cations can be stored in a thin double layer at the electrode / electrolyte interface (non-faradaic mechanism); (2) cations can interact with the bulk of an electroactive material which then undergoes a redox reaction or phase change, as in conventional batteries (faradaic mechanism); or (3) cations can electrochemically adsorb onto the surface of a material through charge transfer processes (faradaic mechanism).
Owner:RGT UNIV OF CALIFORNIA
Mesoporous nanocrystalline film architecture for capacitive storage devices
ActiveUS8675346B2Without energy densityHigh rateNanotechLiquid electrolytic capacitorsCapacitancePath length
A mesoporous, nanocrystalline, metal oxide construct particularly suited for capacitive energy storage that has an architecture with short diffusion path lengths and large surface areas and a method for production are provided. Energy density is substantially increased without compromising the capacitive charge storage kinetics and electrode demonstrates long term cycling stability. Charge storage devices with electrodes using the construct can use three different charge storage mechanisms immersed in an electrolyte: (1) cations can be stored in a thin double layer at the electrode / electrolyte interface (non-faradaic mechanism); (2) cations can interact with the bulk of an electroactive material which then undergoes a redox reaction or phase change, as in conventional batteries (faradaic mechanism); or (3) cations can electrochemically adsorb onto the surface of a material through charge transfer processes (faradaic mechanism).
Owner:RGT UNIV OF CALIFORNIA
Lithium ion secondary battery
ActiveCN1947287AEnsure safetyFinal product manufactureActive material electrodesPorous membraneBattery cell
A lithium ion secondary battery that is furnished with a positive electrode with high thermostability and that even in a nail penetration test, markedly reduces the possibility of falling into thermal runaway. There is provided a lithium ion secondary battery comprising a positive electrode in which a composite lithium oxide is contained and a porous membrane bonded to at least one selected from among a positive electrode surface and a negative electrode surface, wherein the porous membrane comprises an inorganic oxide filler and a membrane binding agent and wherein the composite lithium oxide is represented by the formula: Lia(Co1-x-yM<1>xM<2>y)bO2 (in the formula, the element M<1> is at least one member selected from the group consisting of Mg, Sr, Y, Zr, Ca and Ti; the element M<2> is at least one member selected from the group consisting of Al, Ga, In and Tl; and 0 H01M 4 / 58 H01M 2 / 16 H01M 4 / 02 H01M 10 / 40 3 20 1 2005 / 4 / 22 1947287 2007 / 4 / 11 000000000 Matsushita Electric Ind Co., Ltd. Japan Nagasaki Akira Nishino Hajime sunjing guo donggong man 31210 Japan 2004 / 4 / 23 127853 / 2004 2006 / 10 / 20 PCT / JP2005 / 007730 2005 / 4 / 22 WO2005 / 104273 2005 / 11 / 3 Japanese
Owner:PANASONIC CORP
MXene-based three-dimensional porous flexible self-supporting membrane, preparation method thereof and application of membrane in electrochemical adsorption of dyes
ActiveCN112452299AHigh specific surface areaImprove removal efficiencySemi-permeable membranesOther chemical processesMicrosphereCarbon nanotube
The invention relates to an MXene-based three-dimensional porous flexible self-supporting membrane, a preparation method thereof and an application of the membrane in electrochemical adsorption of dyes. The preparation method of the self-supporting membrane comprises the following steps that an MXene nanosheet suspension, a polystyrene microsphere suspension and a single-walled carbon nanotube suspension are mixed and stirred to be uniform, an obtained mixed solution is subjected to ultrasonic treatment, then vacuum filtration is conducted, so that an MXene / PS / SWCNTs composite film is obtained, and then, the polystyrene microsphere template is removed, so that the MXene-based three-dimensional porous flexible self-supporting membrane can be obtained. The self-supporting membrane obtained in the invention has a large pore volume and a high specific surface area, and can expose more active sites. The prepared self-supporting membrane is used for removing dye through electrochemical adsorption and has the advantages of being high in removal efficiency, easy to recycle, low in cost, easy to control and the like.
Owner:SHANDONG UNIV
Polymer secondary battery and method of making same
InactiveUS6274268B1Improve electronic conductivityImprove efficiencyNon-aqueous electrolyte accumulatorsActive material electrodesSimple Organic CompoundsCarbon composites
A polymer secondary battery uses, for at least one of the active material of positive electrode and the active material of negative electrode, a polymer-carbon composite material including powdered carbon having its surfaces coated with an organic compound polymer capable of adsorbing and desorbing protons electrochemically. The polymer secondary battery has a high rate of appearance of capacity and excellent cycle characteristics.
Owner:TOKIN CORP
Temperature-controllable electrochemical DNA biosensor and preparation method thereof
InactiveCN106596662AHigh selectivityImprove practicalityMaterial electrochemical variablesElectrochemical biosensorA-DNA
The invention provides a temperature-controllable electrochemical DNA biosensor and a preparation method thereof. The preparation method comprises fixing a sulfhydrylated single-chain DNA complementary with a target DNA sequence segment to the surface of a gold wire thermode so that a capture probe is obtained, carrying out complementation with the target DNA to obtain a double-chain structure with a flush end 3', and inducing an excision enzyme III to digest the capture probe from the flush end 3' to 5' of the double-chain structure so that the target DNA is released, carries out novel hybridization digestion cycling with other capture probes so that finally, the amount of the capture probes on the surface of the electrode is significantly reduced. Before and after digestion cycling, a reduction degree of electrode surface capture probe electrochemical adsorption signals to hexaamimineruthenium trichloride in the detection liquid is in a linear relationship with the logarithm of a DNA concentration so that the detection of the target DNA can be achieved. The detection method provided by the invention has the characteristics of short detection time, high sensitivity, low detection line and good selectivity to the detection of the target DNA.
Owner:FUZHOU UNIV
Method for preparing biosensor using porous membrane immobilized enzyme
InactiveCN1850983AImprove stabilityHigh sensitivityBioreactor/fermenter combinationsBiological substance pretreatmentsPorous membraneEconomic benefits
The invention discloses the method of using the fixing enzyme with the lacunaris film to produce the biosensor and belongs to the method of producing the biosensor with the macromolecule lacunaris film fixing the enzyme. The acrylonitrile-crylic acid assembling content is confected to the N, N-dimethylformamide solution, it is spread on the surface of the floor pole, when the 65-85 percentage of the solution is vaporized, the acrylonitrile-crylic acid assembling lacunaris film is produced using the phase transferring method; then the pole with the decorated polymer is dipped in the enzyme solution, the enzyme is fixed on the acrylonitrile-crylic acid assembling lacunaris film with electrochemistry absorbing method to gain the said biosensor. The produced biosensor has many merits such as the good stability, the high delicacy, the fine recurring ability and needing the little enzyme. The possibility of put in the marketable is great because of the easy producing process. The different functional biosensor can be produced using the same fixing material, so it is fit for the checking of the enzyme bottom material and can be applied in the domain of the medicine, foodstuff and circumstance. It has the good economic benefit.
Owner:YANGZHOU UNIV
Circulating water and sewage treatment and reuse system and method
PendingCN112979016AAchieve removalRealize recycling of resourcesWater/sewage treatment by centrifugal separationDispersed particle separationElectrochemical responseChemical reaction
The invention discloses a circulating water and sewage treatment and reuse system and method, and belongs to the technical field of circulating water treatment. The system comprises an adjusting tank, a water inlet pump, an electrochemical descaling reactor, a cyclone separator, an intermediate adjusting tank, an electrochemical desalting reactor, a sludge discharge pump and a sludge dewatering machine. Through electrochemical reaction, hardness ions such as calcium and magnesium in wastewater are removed, the ions are recycled in the form of precipitates such as calcium carbonate and magnesium hydroxide; furthermore, through an electrochemical adsorption process, salt in the water is removed, and fresh water which can be reused in links such as circulating water replenishing is obtained. Compared with a traditional circulating water and blow-down water treatment method, wastewater is treated through electrochemical reaction, no chemical agent is added, no secondary pollution is caused, the requirement for inlet water quality is low, and the problems of membrane pollution and the like do not exist; resources such as calcium and magnesium can be recovered while the wastewater is recycled, so that the method has a good application prospect.
Owner:HUANENG CLEAN ENERGY RES INST
A kind of mxene-based three-dimensional porous flexible self-supporting membrane and its preparation method and application in electrochemical adsorption dyes
ActiveCN112452299BLarge specific surface areaMany active sitesSemi-permeable membranesOther chemical processesMicrosphereCarbon nanotube
An MXene-based three-dimensional porous flexible self-supporting membrane and its preparation method and application in electrochemical adsorption of dyes. The invention provides an MXene-based three-dimensional porous flexible self-supporting membrane and its preparation method and application. The preparation method of the self-supporting membrane comprises the following steps: mixing MXene nanosheet suspension, polystyrene microsphere suspension and single-wall The carbon nanotube suspension was mixed and stirred evenly, and the resulting mixture was subjected to ultrasonic treatment, and then vacuum filtered to obtain MXene / PS / SWCNTs composite membrane, and then the polystyrene microsphere template was removed to obtain MXene-based three-dimensional porous flexible self- supporting membrane. The self-supporting membrane obtained by the invention has larger pore volume, higher specific surface area, and more active sites are exposed. The self-supporting membrane prepared above is used for electrochemical adsorption to remove dyes, which has the advantages of high removal efficiency, easy recycling, low cost, and easy control.
Owner:SHANDONG UNIV
Electrochemical adsorption treatment device and process for water-based waste drilling fluid
ActiveCN107445258AAchieve removalImprove performanceWaste water treatment from quariesDispersed particle separationChemical treatmentWater based
The invention provides an electrochemical adsorption treatment device and process for water-based waste drilling fluid. The electrochemical adsorption treatment device for the water-based waste drilling fluid comprises a mud tank, a mud pump, a flow meter, an electrolytic bath, an electrode and an automatic control system, wherein the mud tank is circularly communicated with the mud pump; the mud pump is communicated with the flow meter; the mud tank is communicated with the flow meter; the flow meter is communicated with the electrolytic bath; the electrode comprise an anode and a cathode; the electrode is arranged in the electrolytic bath; the automatic control system is electrically connected with the electrode; the automatic control system is electrically connected with the flow meter. According to the electrochemical adsorption treatment device and process for the water-based waste drilling fluid, which are provided by the invention, a chemical treating agent is not added; an effective component in drilling fluid is not destroyed; inferior solid phases of a superfine micro-particle and the like in waste drilling fluid can be effectively removed; thus, main performance indexes of the density, the silt content, the solid content and the like of the waste drilling fluid are decreased; the rheological characteristic of the waste drilling fluid is improved, and the recycling performance index requirement of waste-based drilling fluid is met.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Method and apparatus for extracting noble metals from inorganic granular waste catalysts
ActiveUS9005408B2Easy to useHigh extraction rateCellsPhotography auxillary processesMaterials scienceHeat exchanger
The leaching and precipitation of noble metals when circulating an electrolyte through a vertical cylindrical electrolytic cell comprising a fixed granular catalyst bed and a three-dimensional cathode filled with activated carbon granules are performed in the same step. Because the electrochemical leaching process and the electrochemical sorption process are performed simultaneously, the consumption of electric energy is reduced and the use of equipment becomes easy. An apparatus for extracting noble metals from inorganic granular waste catalysts comprises a vertical type electrolytic cell, conduit lines, an electrolyte circulating pump, a unit for automatically maintaining the required acidity of the electrolyte being circulated, a filter for filtering activated carbon particles from the electrolyte, control valves, and stop valves. The electrolytic cell comprises a heat exchanger for heating the electrolyte being circulated, an insoluble anode and a three-dimensional cathode filled with activated carbon granules.
Owner:JIN IN SOO
Mesoporous nanocrystalline film architecture for capacitive storage devices
ActiveUS20180277314A1Without energy densityExcellent in high rate charge/discharge propertiesHybrid capacitor electrodesNanoinformaticsCapacitancePath length
A mesoporous, nanocrystalline, metal oxide construct particularly suited for capacitive energy storage that has an architecture with short diffusion path lengths and large surface areas and a method for production are provided. Energy density is substantially increased without compromising the capacitive charge storage kinetics and electrode demonstrates long term cycling stability. Charge storage devices with electrodes using the construct can use three different charge storage mechanisms immersed in an electrolyte: (1) cations can be stored in a thin double layer at the electrode / electrolyte interface (non-faradaic mechanism); (2) cations can interact with the bulk of an electroactive material which then undergoes a redox reaction or phase change, as in conventional batteries (faradaic mechanism); or (3) cations can electrochemically adsorb onto the surface of a material through charge transfer processes (faradaic mechanism).
Owner:RGT UNIV OF CALIFORNIA
Equipment and treatment method for treating dye wastewater by electrochemical-adsorption process
ActiveCN107140716AImprove current efficiencyStrong oxidation abilityWater contaminantsDispersed particle separationDyeing wastewaterMaterials science
The invention provides equipment and a treatment method for treating dye wastewater by an electrochemical-adsorption process. Main electrode plates of a reactor include a metal copper palladium-loaded graphite plate cathode and a ruthenium titanium tin coated titanium anode, and a space between the main electrode plates is filled with anhydrous NaCl and powdered active carbon. The equipment is high in current conductivity and easy to operate, and can efficiently remove COD from dye wastewater and decolorize the dye wastewater; by the treatment method, the chroma of the dye wastewater can be effectively reduced; and the treatment method is applied to treatment to the dye wastewater with medium and low concentrations.
Owner:HOHAI UNIV
Manganese dioxide-melamine formaldehyde resin double-shell composite phase change material and preparation method thereof
ActiveCN112375545AExcellent photothermal performanceHigh photothermal conversion efficiencyMaterial nanotechnologyManganese oxides/hydroxidesNanowireHeat stability
The invention discloses a manganese dioxide-melamine formaldehyde resin double-shell composite phase-change material, which is prepared by the following steps: preparing melamine-formaldehyde resin microcapsules by using an oxidation-reduction method and an electrochemical adsorption method, and constructing MnO2 nano layers on the surfaces of the microcapsules to form a double-shell spherical structure, wherein the microcapsules are negatively charged through surface modification, the MnO2 nano layer is further constructed through an oxidation-reduction reaction, and the microstructure of theMnO2 nano layer is composed of nano particles and nano wires. The preparation method comprises the following steps: 1) pretreating raw materials;2) preparing microcapsules; and 3) preparing a MnO2 shell layer. According to the invention, the photo-thermal conversion efficiency of the phase change material is 93-99%, the phase change temperature is 10-29 DEG C, and the phase change latent heat is116-169 J / g; and the phase change material has the advantages that the problem of leakage in the phase change process is effectively solved, the photo-thermal conversion efficiency is high, and the phase change latent heat and the thermal stability are high.
Owner:GUILIN UNIV OF ELECTRONIC TECH
A water-based waste drilling fluid electrochemical adsorption treatment device and its process
ActiveCN107445258BRealize resourcesImprove reuse effectWaste water treatment from quariesDispersed particle separationChemical treatmentAutomatic control
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
A method for electric field enhanced selective adsorption of lead ions in heavy metal wastewater
ActiveCN111392825BGood choiceHigh selectivity of adsorptionCarbon compoundsWater contaminantsChemical adsorptionAdsorption selectivity
Owner:NANCHANG HANGKONG UNIVERSITY
Method for preparing biosensor using porous membrane immobilized enzyme
InactiveCN100487132CImprove stabilityHigh sensitivityBioreactor/fermenter combinationsBiological substance pretreatmentsAcrylonitrilePorous membrane
Owner:YANGZHOU UNIV
Method for preparing Ni-Ti3C2 composite electrocatalyst by hydrothermal method
PendingCN114182286AHigh specific surface areaIncrease contact areaElectrodesHydration reactionPtru catalyst
The invention belongs to the technical field of preparation of composite electrocatalysts, and adopts the specific technical scheme that a method for preparing a Ni-Ti3C2 composite electrocatalyst by a hydrothermal method specifically comprises the following steps: 1, dispersing nanosheets into water, and carrying out ultrasonic treatment to obtain a first mixed solution; 2, dispersing nickel chloride hexahydrate into water, and performing ultrasonic treatment to obtain a second mixed solution; 3, dispersing ascorbic acid into water, and performing ultrasonic treatment to obtain a third mixed solution; 4, putting the first mixed solution, a certain amount of the second mixed solution and 5ml of the third mixed solution into a high-temperature and high-pressure reaction kettle, and carrying out ultrasonic treatment on the mixed solution to obtain a fourth mixed solution; and 5, centrifuging the fourth mixed solution, precipitating, cleaning with deionized water, dispersing the cleaned precipitate into absolute ethyl alcohol, and drying in vacuum to obtain Ni-Ti3C2 powder, and by adopting a Ti3C2 nanosheet as a substrate, the catalytic efficiency is improved, and a material basis is provided for improvement of electrochemical adsorption and electro-catalytic performance.
Owner:TAIYUAN UNIV OF TECH
A kind of manganese dioxide-melamine formaldehyde resin double-shell composite phase change material and preparation method thereof
ActiveCN112375545BExcellent photothermal performanceHigh photothermal conversion efficiencyMaterial nanotechnologyManganese oxides/hydroxidesNanowireMelamine formaldehyde resin
The invention discloses a manganese dioxide-melamine-formaldehyde resin double-shell composite phase change material, which utilizes redox method and electrochemical adsorption method to prepare melamine-formaldehyde resin microcapsules, and then constructs MnO on the surface of the microcapsules 2 nanolayers, forming a double-shell spherical structure. Among them, the negative charge is achieved by modifying the surface of the microcapsules, and the further construction of MnO is achieved through redox reactions. 2 nanolayer; MnO 2 The microscopic morphology of the nanolayer is composed of nanoparticles and nanowires. The preparation method includes the following steps: 1) pretreatment of raw materials; 2) preparation of microcapsules; 3) MnO 2 Shell preparation. The photothermal conversion efficiency of the application as a phase change material is 93%-99%; the phase change temperature is 10-29°C, and the latent heat of phase change is 116-169J / g. The invention has the following advantages: 1. Effectively solve the leakage problem in the phase transition process; 2. High light-to-heat conversion efficiency; 3. High phase transition latent heat and thermal stability.
Owner:GUILIN UNIV OF ELECTRONIC TECH
A process for defluoridation of surface water based on carbon nanotube three-dimensional electrode
ActiveCN112551652BGood chemical stabilityImprove conductivityWater contaminantsWater/sewage treatment apparatusCarbon nanotubeChemical adsorption
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
Preparation method and application of modified magnesium lithium silicate
ActiveCN112875713AImprove adsorption capacityIncrease the amount of negative chargeSilicon compoundsFood scienceMagnesium saltSilicic acid
The invention discloses a preparation method and application of modified magnesium lithium silicate, and the preparation method comprises the following steps: taking a beryllium-containing substance, a magnesium salt, a lithium salt, silica sol and the like as raw materials, and carrying out high-temperature hydrothermal reaction to prepare magnesium lithium silicate; the number of charges of the crystal lattice structure is large, and the mycotoxins with small polarity such as zearalenone and vomitoxin can be effectively adsorbed in an electrochemical adsorption mode, so that the application prospect in the industry of preventing and treating the mycotoxins by feed is extremely wide.
Owner:JIANGSU HEMINGS NEW MATERIALS TECH CO LTD
A temperature-controllable electrochemical dna biosensor and its preparation method
InactiveCN106596662BHigh selectivityImprove practicalityMaterial electrochemical variablesCyclic processLinear relationship
The invention provides a temperature-controllable electrochemical DNA biosensor and a preparation method thereof. The preparation method comprises fixing a sulfhydrylated single-chain DNA complementary with a target DNA sequence segment to the surface of a gold wire thermode so that a capture probe is obtained, carrying out complementation with the target DNA to obtain a double-chain structure with a flush end 3', and inducing an excision enzyme III to digest the capture probe from the flush end 3' to 5' of the double-chain structure so that the target DNA is released, carries out novel hybridization digestion cycling with other capture probes so that finally, the amount of the capture probes on the surface of the electrode is significantly reduced. Before and after digestion cycling, a reduction degree of electrode surface capture probe electrochemical adsorption signals to hexaamimineruthenium trichloride in the detection liquid is in a linear relationship with the logarithm of a DNA concentration so that the detection of the target DNA can be achieved. The detection method provided by the invention has the characteristics of short detection time, high sensitivity, low detection line and good selectivity to the detection of the target DNA.
Owner:FUZHOU UNIV
Electrochemical adsorbtion with graphene nanocomposites
InactiveUS20200017374A1Promote regenerationLarge specific surface areaElectrolysis componentsOther chemical processesGraphene nanocompositesPhysical chemistry
Owner:UTI LLP
Preparation method for electro-geochemical adsorption material for uranium exploration
InactiveCN106076281AReduce background contentImprove adsorption capacityOther chemical processesPreparing sample for investigationUranium oreActive state
The invention belongs to the field of uranium ore resource prospection, and concretely provides a preparation method for an electro-geochemical adsorption material for uranium exploration. The preparation method comprises dipping in a nitric acid solution to remove background content of uranium element in polyurethane foam plastic, loading with an organic extraction agent possessing adsorption efficiency, and other steps. In the background-removed polyurethane foam plastic obtained through the preparation method, the background content of uranium element is effectively reduced, therefore influence of the background content of the polyurethane foam plastic on an analysis measurement result is reduced, and further the analysis measurement result is relatively accurate. Meanwhile, the background-removed polyurethane foam plastic is loaded with a proper organic extraction agent, the adsorption capability of the background-removed polyurethane foam plastic during electro-geochemical extraction is improved, and extraction efficiency of active-state uranium element is enhanced.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Method for electric field enhanced selective adsorption of lead ions in heavy metal wastewater
ActiveCN111392825AGood choiceHigh selectivity of adsorptionCarbon compoundsWater contaminantsChemisorptionAdsorption selectivity
The invention discloses a method for electric field enhanced selective adsorption of lead ions in heavy metal wastewater, and relates to a method for recovering lead ions from heavy metal wastewater.The invention aims to solve the technical problems of difficulty in targeted recovery of heavy metals from complex water environments and low recovery purity caused by poor selectivity of existing adsorbents. A tannic acid@graphene oxide conductive aerogel material is applied to a water body heavy metal electrochemical adsorption system as a conductive adsorbent, and under the action of an electric field, the adsorption selectivity of the tannic acid@graphene oxide conductive aerogel material to Pb<2+> is enhanced. According to the method disclosed by the invention, the conductive layer of thetannic acid@graphene oxide conductive aerogel material can be optimized through electrochemical reduction, so that the material has better conductivity, and has better selectivity to lead ions underthe action of an electric field. The method is applied to recovery of lead from metal wastewater.
Owner:NANCHANG HANGKONG UNIVERSITY
Preparation method of carbon aerogel loaded titanium dioxide electrodes and application thereof
InactiveCN101549895BWide concentration rangeEasy to handleWater/sewage treatment by irradiationChemical industryEngineeringPhotocatalytic degradation
The invention belongs to the technical field of water processing, in particular relates to a preparation method of carbon aerogel load titanium dioxide electrodes and application thereof. The specific steps are as follows: preparation of carbon aerogel, preparation of butyl carbonate sol, load and sintering of butyl carbonate sol gel, thereby obtaining required product. The electrode has the advantages of high porosity, big specific surface, high electrical conductivity, controlled face shaping, strong photocatalytic activity, and the like, and is applied to processing high-chroma dye waste water by electrochemical absorption fill light catalytic degradation. The CA / TiO2 in the invention has good electric absorption performance and photocatalytic activity; with the auxiliary strengthening effect of electric absorption, the concentration range of colored dye waste water degradation removal is wide (100 mg / L to 1000 mg / L); and the removing speed can be improved more than 3 times compared with photocatalytic degradation. The technology has simple and convenient operation and good processing effect for pollutant waste water, is a high-efficient and energy-saving new technology, and has very great application value in the field of waste water processing.
Owner:TONGJI UNIV
Surface water defluorination process based on carbon nanotube three-dimensional electrode
ActiveCN112551652AGood chemical stabilityImprove conductivityWater contaminantsWater/sewage treatment apparatusSurface waterGlycol synthesis
The invention relates to a surface water defluorination process based on a carbon nanotube three-dimensional electrode. The surface water defluorination process mainly comprises the steps of preparinga fluoride adsorption three-dimensional electrode, modifying the surface of a carbon nanotube with a metal oxide, building a reaction device, adding a reaction reagent, electrifying the device, carrying out electrochemical adsorption experiments to carry out surface water defluorination and measuring the concentration of fluorine ions in a water sample. The metal oxide is introduced to modify thecarbon nanotube, so that the specific surface area for adsorbing fluorine ions is further increased, and the fluorine ions in the water body are more stably removed; ethylene glycol is used as a solvent in the preparation process, so that the dispersity of the carbon nanotube is improved, the agglomeration phenomenon is effectively reduced, and metal particles are more uniformly and dispersedly modified on a tubular structure; a titanium mesh is used for preparing the carbon nanotube into a sheet electrode, rapid recovery can be realized, secondary pollution to the water body is avoided, theactual operation process is simple and convenient, the cost is low, and the purification treatment requirements of large-flow and large-volume fluoride polluted surface water can be met.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
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