32 results about "Electrochemical adsorption" patented technology

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

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.

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.

The invention discloses a method for selectively adsorbing lead ions in heavy metal wastewater by electric field strengthening, and relates to a method for recovering lead ions from heavy metal wastewater. The invention aims to solve the technical problem that the existing adsorbent has poor selectivity, which makes it difficult to recover heavy metals in a targeted manner from complex water environments, and the recovery purity is not high. In the present invention, the tannic acid@graphene oxide conductive airgel material is applied to the water heavy metal electrochemical adsorption system as a conductive adsorbent. 2+ The adsorption selectivity was enhanced. In the method of the present invention, the tannic acid@graphene oxide conductive airgel material can optimize its conductive layer through electrochemical reduction, so that the material has better conductivity, and has better selectivity for lead ions under the action of an electric field . The invention is applied to recovering lead in metal waste water.

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.

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.

The invention relates to a surface water defluorination process based on a three-dimensional carbon nanotube electrode, which mainly includes preparing a three-dimensional electrode for fluoride adsorption, modifying the surface of a carbon nanotube with a metal oxide, building a reaction device, adding a reaction reagent, and electrifying the device. Chemisorption experiments were used to remove fluoride from surface water and determine the concentration of fluoride ions in effluent samples. The present invention introduces metal oxides to modify carbon nanotubes, further increases the specific surface area for adsorbing fluoride ions, and removes fluoride ions in water more stably; in the preparation process, ethylene glycol is used as a solvent to improve the dispersibility of carbon nanotubes and effectively reduce The agglomeration phenomenon makes the metal particles more uniformly dispersed on the tubular structure; the present invention uses titanium mesh to prepare carbon nanotubes into sheet electrodes, which can realize rapid recovery without causing secondary pollution to the water body, and the actual operation process is simple. The cost is low, and it can meet the purification treatment requirements of large flow and large volume of fluoride-contaminated surface water.

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.

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.