248 results about "Electrochemical electrode" patented technology

Disclosed herein are a graphene hybrid material and a method for preparing the graphene hybrid material, the graphene hybrid material comprising: a matrix having lattice planes disconnected on a surface thereof; and layers of graphene which are epitaxially grown along the lattice planes disconnected on the surface of the matrix such that the layers of graphene are oriented perpendicularly to the matrix, and which are spaced apart from each other and layered on the matrix in the same shape. The graphene hybrid material can be usefully used in the fields of next-generation semiconductor devices, biosensors, electrochemical electrodes and the like.

The invention discloses a method for preparing graphene modified by a silane coupling agent. The method includes adding graphite oxide and the silane coupling agent into reaction solvent, controlling the temperature to range from 0 DEG C to 90 DEG C, realizing stirred reaction for 0.1 to 72 hours and obtaining graphite oxide grafted with the silane coupling agent; adding the graphite oxide grafted with the silane coupling agent into reduction solvent, adding a reducer into the reduction agent, controlling the temperature to range from 0 DEG C to 90 DEG C, realizing stirred reduction reaction for 0.1 to 72 hours and obtaining graphene liquor grafted with the silane coupling agent; and treating the graphene liquor grafted with the silane coupling agent and then obtaining solid graphene powder modified by the silane coupling agent. The mass ratio of the graphite oxide and the silane coupling agent is 1:0.1-5. The technological method is simple and speedy, requirements on reaction conditions are low, a process is easy to control, and the graphene modified by the silane coupling agent can be obtained without catalysts or multi-step complicated reaction. The graphene is fine in polymer compatibility and simple in preparation and can be widely applied to fields of preparation of graphene modified polymers and novel electrochemical electrodes and novel optical and conductive materials, raw materials are easily available, and a product has good dispersibility in partial organic solvent.

The invention relates to electrochemical electrodes containing branched nanostructures having increased surface area and flexibility. These branched nanostructures allow for higher anode density, resulting in the creation of smaller, longer-lasting, more efficient batteries which require less area for the same charging capacity. Also disclosed are methods for creating said branched nanostructures and electrodes.

A conductive boron doped nanocrystalline diamond is described. The boron doped diamond has a conductivity which uses the boron in the crystals as a charge carrier. The diamond is particularly useful for electrochemical electrodes in oxidation-reduction reactions and decontamination of aqueous solutions.

Layered structures and associated fabrication methods that serve as the foundation for preparing high-operating-temperature electrochemical cells have a porous ceramic layer and a porous metal support or current collector layer bonded by mechanical interlocking which is provided by interpenetration of the layers and / or roughness of the metal surface. The porous layers can be infiltrated with catalytic material to produce a functioning electrochemical electrode.

A nano-crystal diamond film synthesized on a substrate and containing, as a major component, nano-crystal diamond having a grain diameter from 1 nm to less than 1000 nm. This nano-crystal diamond film can be formed on a substrate by means of a plasma CVD method using a raw material gas containing a hydrocarbon and hydrogen, allowing the formation of the nano-crystal diamond film to take place outside the plasma region. This nano-crystal diamond film is applicable to the manufacture of an electrochemical device, an electrochemical electrode, a DNA chip, an organic electroluminescent device, an organic photoelectric receiving device, an organic thin film transistor, a cold electron-emission device, a fuel cell and a catalyst.

The invention belongs to the technical field of micro-fluidic analysis chips, and concretely relates to a nano-material electrode modification based electrochemical integrated digital micro-fluidic chip. The electrochemical integrated digital micro-fluidic chip treats a digital micro-fluidic chip as a base and integrates an electrochemical-sensing micro-electrode, an electrochemical electrode is embedded in the control electrode of the digital micro-fluidic chip, and all the electrodes are positioned in a same plane of the chip. The nano-material modification of the electrochemical sensing electrode is realized through the micro-fluidic automatic control in order to enhance the electrochemical sensing capability of the micro-fluidic chip. The nano-material electrode modification based electrochemical integrated digital micro-fluidic chip has the advantages of novel design, high integration level, convenient making, high automation degree, strong detection capability, realization of the micro-scale, rapid and sensitive detection, and substantial widening of the application ranges of the electrochemical sensing and digital micro-fluidic fields.

The present invention relates to a microwave plasma deposition process and apparatus for producing diamond, preferably as single crystal diamond (SCD). The process and apparatus enables the production of multiple layers of the diamond by the use of an extending device to increase the length and the volume of a recess in a holder containing a SCD substrate as layers of diamond are deposited. The diamond is used for abrasives, cutting tools, gems, electronic substrates, heat sinks, electrochemical electrodes, windows for high power radiation and electron beams, and detectors.

A multiphase composite material having utility as an electrochemical electrode or catalyst includes a first active phase which is an amorphous, electrochemically active material; and a second, stabilizer phase which includes one or more of: metals, carbon, ceramics, and intermetallic compounds. The stabilizer phase is configured as a plurality of spaced apart regions having the active phase disposed therebetween. The active phase may comprise one or more of: Sn, Sb, Bi, Pb, Ag, In, Si, Ge, and Al. The stabilizer phase may include one or more of: Fe, Zr, Ti, and C. Also disclosed are electrodes and batteries which include the material as well as methods for manufacturing the material by using a mechanical alloying process.

The invention provides a method and a device for realizing the photoelectrochemical micro-etch processing of a masked electrode, and relates to the micro processing field in the manufacturing technology. A masked electrode used by the invention comprises a glass substrate, an indium tin oxide (ITO) layer and a photoresist mask layer, wherein the conductive light-permeable ITO layer is used as a tool electrode for electrochemical processing and can be permeated by a laser beam, and the photoresist mask layer can limit the action zones of the laser beam and the electrochemical electrode to achieve the double effects of a beam mask and an electric field mask. When the laser beam permeates the masked electrode, a mask pattern is imaged on the surface of a workpiece, the force effect of a shock wave generated by the irradiation of the laser between the workpiece and the electrolyte enables the passivation layer to be removed by the generation of stress corrosion. Meanwhile, the workpiece material at the laser-irradiated part is removed by etching under the action of the photoelectrochemical reaction. The invention can effectively enhance the processing efficiency, the micro processing degree and the processing precision of the complex pattern, and is applicable to the micro processing of the conductive metal material.

A corrosive resistant metal material covered with a conductive substance suitable for use in a component material requiring conductivity and corrosion resistance like electrical conductive material, electrical contact, electromagnetic wave shield, electrochemical electrode or antistatic material, specifically for component material requiring conductivity in sever condition of corrosive environment is provided. A corrosive resistant metal material covered with a conductive substance is formed by cladding a corrosive resistant metal selected from the group consisting of titanium, zirconium, tantalum, niobium and alloy thereof on a conductive metal selected from the group consisting of iron, aluminum, copper, titanium, magnesium, zirconium, tantalum, niobium, tungsten, nickel, chrome and alloy thereof, and covering a conductive surface finishing layer over surface of a corrosive resistant metal layer with a mixture of conductive substance and resinous binder.

The invention discloses a hydro-thermal synthesis preparation method for a manganese dioxide three-dimensional graphene composite material with controllable appearance and application of the preparation method in the field of supercapacitors. By adjusting solution acidity and reaction temperature in a synthesis process, surface appearance of manganese dioxide can be effectively controlled, and manganese dioxide / graphene composites of various appearance including planar meshes, irregular flower forms, nanotubes and nano particles. The composites can directly serve as electrochemical electrodes with ultra-high capacitance value.

The invention discloses a preparation method and application of a three-dimensional graphene electrode for an electrochemical biosensor. The preparation method comprises the following steps of: fixing spongy graphene in which industrially produced foam nickel is taken as a substrate and which has a three-dimensional structure and is synthesized through chemical vapor deposition on a glass or quartz sheet; connecting the spongy graphene with the three-dimensional structure and a wire by using a silver conductive adhesive; and coating organic silica gel on a connection point of the metal wire and the graphene for insulation to obtain a spongy graphene electrochemical electrode with the three-dimensional structure. The three-dimensional spongy graphene electrode has the outstanding characteristics of high conductivity, high specific surface area, high electrochemical stability and the like, is easily subjected to surface functional modification, and has high detection sensitivity to dopamine and nicotinamide adenine dinucleotide; and a highly sensitive electrochemical biosensor for non-enzymatically and selectively detecting glucose can be obtained after the surface of the electrode is modified by Co3O4.

An electrochemical electrode probe includes an elongated body of a porous material disposed in a housing. The porous material is permeated with an electrolyte. A body of electrode material surrounds the porous body and functions as one electrode of an electrochemical system. A portion of the elongated body of porous material projects beyond the electrode body and functions to establish ionic and electrical conductivity with a sample of material which is to be tested. The sample of material functions as a working electrode, and the electrode body of the probe functions as a counter electrode / reference electrode. Further disclosed is an electrochemical analysis system which includes the probe and a support plate operable to retain a plurality of samples of test material thereupon. The probe is moved across the plate to sequentially measure the electrochemical properties of the various samples of material. Also disclosed are methods for using the system.

The invention belongs to the technical field of biological chips, concretely relates to a novel electrochemical sensor chip with a digital microfluidic technology. The chip is sequentially composed of three parts from bottom to top: a droplet control unit, a droplet passage and an electrochemical unit, wherein the droplet control unit is composed of a first substrate, a first insulation layer, a first electrode layer, a second insulation layer and a first hydrophobic layer from bottom to top; the electrochemical unit is sequentially composed of an electrochemical electrode group, a second hydrophobic layer, a second electrode layer, a third insulation layer and a second substrate from bottom to top; when the first substrate and the second substrate are insulation materials, the first insulation layer and the third insulation layer are left out; the electrochemical electrode group comprises a counter electrode, a working electrode and a reference electrode and covers the lower surface of the second hydrophobic layer; the droplet passage is an air gap in the droplet control unit and the electrochemical unit. In the invention, the advantages of a digital microfluidic technology and an electrochemical sensor technology are combined and a novel micro-analysis device is provided for biochemical analysis; and therefore, the sample demand is decreased, the detection speed is increased, the conveying of various liquid samples needed in detection can be realized and the on-line detection is realized.

This invention discloses an electrochemical electronic tongue based on broadband pulse voltammetry, composed of the electrode array, broadband pulse scanners and data analysis software. The electrode array is electrochemical electrode group that is made up with the reference electrode, auxiliary electrodes and multi - the work - a multi-channel electrode. The data analysis software is installed on the computer; electrode array will be placed analyte solution system. The broadband pulse scanner output pulse of a number of different scanning frequency signal, and then the signal is imposed on the analyte solution through parameter electrode of electrode array and working electrode. The circuit response signals produced by the solution return to broadband pulse scanner through secondary electrode. The invention can detect overall features of material and the differences between the material characteristics effectively, and has analytical speed, wide frequency range, access informative features.

The invention discloses a preparation method of thiol-modified graphene. The preparation method of the thiol-modified graphene comprises the following steps: adding graphite oxide and alkylamine with thiol at one end in a reaction solvent and stirring for reaction to obtain thiol-modified graphite oxide, wherein the mass ratio of the graphite oxide to the alkylamine is 1:(0.01-10.0) and the reaction temperature is 0-90 DEG C and the reaction lasts for 0.1-72 hours; adding the thiol-modified graphite oxide and a reducing agent to a reaction solvent and stirring for reaction to obtain a thiol-modified graphene solution, wherein the reaction temperature is 0-90 DEG C and the reaction lasts for 0.1-72h; and washing and drying the thiol-modified graphene to obtain solid powder of the thiol-modified graphene. According to the preparation method of the thiol-modified graphene, disclosed by the invention, the process method is simple and quick, reaction conditions are tender and environment-friendly, the raw materials are cheap and easy to get, no catalyst is needed, the prepared thiol-modified graphene has good dispersity in an organic solvent, and the preparation method of the thiol-modified graphene can be widely applied to the field of preparation of novel nano composite materials, preparation of novel electrochemical electrodes, as well as novel optical and conductive materials and the like.

In the invention, negative pole is fit on inwall of casing of processing device, tubular positive pole is fixed at center of casing, ultraviolet light tube covered by quartz tube is fit in the tubular positive pole. Electrochemical reaction area is formed between the negative and positive poles, photochemical reaction area is formed between the positive pole and the quartz tube, water charging pipe being dip with casing axis and cotacting with outside surface of the casing, water discharging pipe led out of the casing is fit on top part of positive pole, electrolyte, molysite or / and perhydrol are added in organic waste water which is pumped in the casing and into electrochemical reaction area and photochemical reaction area in turn, waste water flow is controlled in 10-15 mlls, electrochemical pole current is 0.1-2.0A and connected with ultraviolet light at the same time.

The invention provides an electrochemical cell based on a new chemistry for a flow battery for large scale, e.g., grid-scale, electrical energy storage. Electrical energy is stored chemically at an electrochemical electrode by the protonation of small organic molecules called quinones to hydroquinones. The proton is provided by a complementary electrochemical reaction at the other electrode. These reactions are reversed to deliver electrical energy. A flow battery based on this concept can operate as a closed system. The flow battery architecture has scaling advantages over solid electrode batteries for large scale energy storage.

A flow cell cartridge for the detection of differences in nucleic acid sequences is disclosed. The flow cell cartridge has an electrode array and two openings, in which one opening is for the entry and exit of sample, and the other opening is for the control of the entry and exit of sample through the exertion of negative and positive pressure. The entire flow cell cartridge can be moved from sample to sample to allow different samples to be drawn into the cartridge into contact with an electrochemical electrode array, thus allowing reactions to occur in the chamber itself.

The invention provides a single particle layer nano-diamond film and a preparation method thereof. The preparation method comprises the following steps: polishing a monocrystalline silicon piece by using a diamond, and then cleaning and drying to obtain a monocrystalline silicon substrate; putting the monocrystalline silicon substrate in hot filament chemical vapor deposition equipment; by taking acetone as a carbon source, bringing acetone to a reaction chamber in a hydrogen bubbling manner, wherein the flow rate of hydrogen to acetone is 200: 90, the distance from a hot filament to the monocrystalline silicon substrate is 7mm, the reaction power is 1600-2300W, and the working air pressure is 1.63Kpa, no bias voltage is applied in the reaction process, the film growing time is 10-50 minutes; and after growth, dropping the temperature and cooling under a condition of not introducing hydrogen, thus obtaining the single particle layer nano-diamond film which is 300-700nm thick. The film is relatively strong in Si-V light-emitting property and has a broad application prospect in the field of single-photon sources, quantum information processing, optoelectronic devices, electrochemical electrodes, biomarkers, semiconductor apparatuses, field emission displays and the like.

The invention provides an electrochemical cell based on a new chemistry for a flow battery for large scale, e.g., gridscale, electrical energy storage. Electrical energy is stored chemically at an electrochemical electrode by the protonation of small organic molecules called quinones to hydroquinones. The proton is provided by a complementary electrochemical reaction at the other electrode. These reactions are reversed to deliver electrical energy. A flow battery based on this concept can operate as a closed system. The flow battery architecture has scaling advantages over solid electrode batteries for large scale energy storage.

A method for preparing titanium carbide nanometer particles and composite materials thereof by a direct current arc method belongs to the field of nanometer material preparation technology and application. The method is characterized by including steps of using automatically controlled direct-current arc plasma equipment; utilizing a bulk metal titanium raw material as an anode and a graphite bar as a cathode; leading in mixed gases including carbonic reaction gas, inert gas and active gas which are in certain proportion; and obtaining the titanium carbide nanometer particles and the composite materials thereof after evaporating the bulk metal raw material. The method has the advantages that a preparation process is simple, the kind of nanometer powder materials can be produced on a large scale, size distribution is uniform, purity is high, and accordingly the method can be applied to the fields of electrochemical electrodes and wear-resistant coating materials.

A process of preparing coating positive pole for electrolyzation. The coating positive pole bases Ti. Middle layer is oxide Ti. Outside layer is Pt or Pt-Ru oxidate. The coat can be obtained by way of electrochemical oxidation or heat decomposition.

The invention relates to a ZnO nanowire biosensor and a preparation method thereof, belonging to the technical field of nano semiconductor materials. In the prior art, the mixed solution of ZnO nano particles and enzyme are spun on an electrochemical electrode so that an enzyme electrode is made; the ZnO nano particles are fully wrapped by the non-conducting enzyme, and besides, an enzyme film formed on the surface of the electrochemical electrode is uneven, thereby affecting the direct electronic transfer between the active center of the enzyme and the electrode; and therefore, the sensitivity of the electrochemical electrode as a biosensor is reduced. The ZnO nanowire biosensor comprises a substrate, ZnO and the enzyme, wherein a conducting layer is arranged on the substrate, a ZnO nanowire is grown on the conducting layer, and an enzyme-wrapped layer is attached to the surface of the nanowire. The method of the invention comprises the following steps of: firstly making the conducting layer on the substrate, then growing the ZnO nanowire on the conducting layer, and thirdly generating the enzyme-wrapped layer on the surface of the nanowire. The biosensor as a working electrode is used for electrochemical working stations as chemical test devices to realize accurate tests.

The invention relates to a novel composite electrode material and a preparation method thereof, pertaining to the technical field of electrochemical electrode materials. Aiming at the problems of poor compactness of coating, low generating capacity and complex technology of the existing mixed metal oxides, the invention utilizes the high strength, good conductibitily, and the regulating effect to the traditional mixed metal oxide coating solution viscosity and leveling property of a carbon nano tube to prepare a composite mixed metal oxide electrode material with even and smooth appearance, compact microstructure, good mechanical property, good inoxidability, high generating capacity and reinforced carbon nano tube. The preparation process comprises the following steps: a mixed metal oxide precursor solution containing 0.1g / L to 5g / L of single-walled or multi-walled carbon nano tube that is processed with purification, short cutting and dispersion is coated on a conductive substrate surface which is roughened; the substrate is dried after being roasted at the temperature of 100 to 200 DEG C for 5 to 15min, sintered for 5 to 10min at the temperature of 400 to 600 DEG C; the coating and sintering steps are repeated till the required electrode coating thickness is reached; and finally the substrate is sintered for 50 to 150min at the temperature of 400 to 600 DEG C. As the coating solution velocity of the carbon nano tube is increased, the smoothness of the solution is improved, and the thickness and leveling property of the single-walled electrode coating are improved, the invention shortens the preparation time of electrode coatings with the same thickness, and leads the yield and production stability to be improved.

The invention particularly relates to a method for fixing terpyridyl ruthenium on the surface of an electrochemical electrode, which belongs to the field of materials and electrochemical luminescence detection. The method includes: reducing graphene oxide into a graphene film with excellent conductivity on the surface of the electrochemical electrode by means of chemical reduction reaction; firmly attaching the generated graphene film on the surface of the electrode; and stably fixing the terpyridyl ruthenium to the surface of the electrode by means of pi-pi interaction. Compared with other methods, the method has the advantage that an electrochemical luminescence sensor manufactured by the method has fine electrochemical luminescence performance and excellent stability, and is simple in operation and low in cost. In addition, the graphene film is used for fixing the terpyridyl ruthenium and also serves as a substrate for loading enzyme or nanoparticles on the electrochemical luminescence sensor, so that the electrochemical luminescence sensor manufactured by the method is wide in application prospect.

The invention discloses a folded paper-structured body surface sweat electrochemical sensor and a monitoring method, and relates to the electrochemical field. A paper substrate in the sensor is foldedto form 5 layers of paper structures; each layer of the paper structure is composed of a drainage layer and a hydrophilic layer; in the folding state, a first hydrophilic layer on a sweat collectinglayer, a second hydrophilic layer on a sweat diversion layer, a third hydrophilic layer on a sweat analyzing layer, a fourth hydrophilic layer on an electrode bearing layer, and a fifth hydrophilic layer on a sweat evaporating layer are contacted layer by layer to form a vertical channel, in which the sweat is diffused from the bottom of the sweat collecting layer to the top of the sweat evaporating layer; an electrochemical electrode system is set on one side of the electrode bearing layer folded towards the sweat analyzing layer; and an electrode detection end is contacted with the third hydrophilic layer on the sweat analyzing layer. The sensor and the monitoring method provided by the invention can separately collect, detect and evaporate the sweat, and reduce the mutual interference;the sweat is capable of flowing; the timeliness and the accuracy of the detection are improved; and at the same time, the discomfort of the user is reduced.