390 results about "Glassy carbon" patented technology

A thermoplastic composition such as a polyester composition including polyethylene terephthalate polymers containing glassy carbon, and the preforms, bottles, sheets, rods, tubes, films and other articles made from these compositions. Also, polyester compositions are provided which have a certain individual or combination of properties, including low coefficient of static friction, low coefficient of static friction and low haze or high L* or low positive b* or a combination thereof, and those having low L* and low positive b* at given reheat rates.

A power cell (100A) has an electrolyte that includes a reodox pair comprising cerium. The electrolyte in preferred cells is an acid electrolyte that comprises a element ion complexed by an organic acid or a chelating agent, and contemplated electrolytes may further include a compound that reduces the hydrogen overpotential. Where the power cell comprises a plurality of cells (100B), preferred configurations may include glassy carbon as bipolar electrolytes.

Disclosed is an induction heating type pure water heating apparatus capable of heating pure water with efficiency and without contaminating pure water. The apparatus is characterized by including a susceptor formed of glassy carbon with a water absorption coefficient of 0.5 mass % or less, and capable of contacting with pure water, a container made of a magnetic flux transmissive material, and formed so as to accommodate the susceptor and so as to allow pure water to pass therethrough, and an induction coil disposed in such a state as to surround the container or as to be adjacent to the container.

A biphasic nanoporous vitreous carbon material with a cementitious morphology characterized by presence of non-round porosity, having superior hardness and tribological properties, as useful for high wear-force applications. The biphasic nanoporous vitreous carbon material is produced by firing, under inert atmosphere, of particulate vitrified carbon in a composition containing (i) a precursor resin that is curable and pyrolyzable to form vitreous carbon and, optionally, (ii) addition of one or more of the following: solid lubricant, such as graphite, boron nitride, or molybdenum disulfide; a heat-resistant fiber reinforcement, such as copper, bronze, iron alloy, graphite, alumina, silica, or silicon carbide; or one or more substances to improve electrical conductivity, such as dendritic copper powder, copper “felt” or graphite flake, to produce a superior vitreous carbon that is useful alone or as a continuous phase in reinforced composites, in relation to conventional glassy carbon materials.

A continuous casting mold for a Cu alloy, using any one member selected from a glassy carbon, a metal-based self-lubricating composite or a graphite with a bulk density exceeding 1.92, at least for the mold member including the solidification starting position of the Cu alloy melt. A continuous casting mold for a Cu alloy, composed of any one member selected from a graphite, a ceramic and a metal member or of a combination of two or more parts of members thereof, in which at least the inner wall in the solidification starting position of the Cu alloy melt is coated with a self-lubricant or a metal-based self-lubricating composite material. A continuous casting method of a Cu alloy, comprised of giving, at the time of continuously casting the Cu alloy by an intermittent pulling out method, a vibration that has a frequency larger than the slab intermittent pulling out frequency by two orders or more and that has a component vertical to the pulling out direction of the slab, or continuously supplying a lubricant or an anti-sticking material between the inner wall of the mold and the slab.

An electric device has a plurality of cells in which in an acid electrolyte a lanthanide and zinc form a redox couple that provide a current, and in which at least two of the cells are separated by a bipolar electrode that comprises a glassy carbon or a Magneli phase titanium suboxide.

The invention discloses a method for quickly detecting lead and cadmium by adopting scanning anodic stripping voltammetry. The method comprises the following steps: a sample to be tested is prepared; lead or cadmium standard liquid is prepared; a three-electrode system consisting of glassy carbon electrodes plated with mercury films, platinum wire counter electrodes and Ag/AgCl reference electrodes is assembled; parameters are set and the scanning anodic stripping voltammetry is adopted to respectively implement parallel determination for current values between working electrodes and reference electrodes of each standard liquid solution until the relative standard deviation of readings is not more than 5%; lead and cadmium heavy metals of the sample are measured through detecting the current values between the working electrodes and the reference electrodes; a working station automatically calculates to obtain detecting results through automatically searching peaks to determine each curve peak area. The detecting method has the advantages of high sensitivity, good accuracy, reduction of mercury pollution, high electrode stability and good reproducibility, and can be applied to the detection of the heavy metals of lead and cadmium with conventional trace and ultratrace.

Disclosed is a lithium-ion secondary battery which includes a carbonaceous material in an anodic active material mix, and a cyclic carbonate and a chain carbonate both in an electrolytic solution. The solvent contains an additive which is a substance having a LUMO energy determined through molecular orbital calculation of lower than the LUMO energy of ethylene carbonate determined through molecular orbital calculation and having a HOMO energy lower than the HOMO energy of vinylene carbonate determined through molecular orbital calculation, the electrolytic solution contains LiPF₆ or LiBF₄ as an electrolyte, and the electrolytic solution shows a reduction-reaction current of −0.05 mA/cm² (provided that a reaction current on the reducing side be negative) or less at a potential lower than 1 V and shows an oxidation-reaction current of 0.5 mA/cm² (provided that a reaction current on the oxidizing side be positive) or more at a potential higher than 5.7 V in an LSV measurement at a potential sweep rate of 1 mV/s using a glassy-carbon disk electrode as a working electrode, a platinum electrode as a counter electrode, and a lithium electrode as a reference electrode.

The invention relates to a catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2, application and a method for preparing formic acid by electrocatalytic reduction on CO2. The catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2 comprises a glassy carbon sheet and a coating covering the glassy carbon sheet, wherein the material of the coating is stannic oxide containing oxygen vacancies, and the stannic oxide containing oxygen vacancies is obtained by performing vacuum thermal process on stannic oxide at 200-400 DEG C for 2-4 h. The catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2 is applied to electrocatalytic reduction of CO2, and is capable of improving the rate and the current efficiency of preparing formic acid by electrocatalytic reduction of CO2. At the same electric potential, the rate of preparing formic acid by reducing CO2 by employing the catalysis electrode is increased by nearly 3 times compared with that by employing unprocessed catalysis electrodes, and the current efficiency is improved by nearly one time.

The invention relates to a porous structure, characterized in that it comprises a porous matrix (15) made of carbon fabric, said porous matrix being bounded on at least one of its faces (17, 21) by an impermeable layer (19, 23) made of an element chosen from carbon fibres, carbon nanotubes and glassy carbon, said impermeable layer being linked to the porous matrix via carbon-carbon bonds. The invention also relates to a process for manufacturing such porous structures. Application to the fields of fuel cells and heat exchangers.

A method of recovering carbon black includes the step of providing a carbonaceous source material containing carbon black. The carbonaceous source material is contacted with a sulfonation bath to produce a sulfonated material. The sulfonated material is pyrolyzed to produce a carbon black containing product comprising a glassy carbon matrix phase having carbon black dispersed therein. A method of making a battery electrode is also disclosed.

The invention relates to a preparation method and application of a core-shell type ultra-micro electrode. The core-shell structure ultra-micro electrode is obtained by preparing ultra-micro electrode fibers of a coaxial structure in a one-step mode through a coaxial electrostatic spinning method and then performing packaging. The coaxial structure comprises a core electrode base layer and one or two surface sensing layers. By the adoption of the one-step forming technology, the complex surface modification process of traditional ultra-micro electrodes (such as glassy carbon electrodes obtained after ablation treatment) is omitted, and the ultra-micro electrode with the diameter ranging from 40 nm to 6 micrometers can be prepared; due to the subsequent treatment temperature ranging from 70 DEG C to 150 DEG C, the structures and functions of organic functional components (such as biological protein and enzymes) in a modification layer of the ultra-micro electrode can be easily maintained, which is of great significance for the pluralistic design of the ultra-micro electrode. The ultra-micro electrode is used for detecting adenosine triphosphate (ATP), dopamine and adrenal hormones and is high in response speed and sensitivity, strong in anti-jamming capability and especially suitable for on-line rapid determination, particularly, real-time non-destructive determination of living cells.

A method for manufacturing a carbon composite is provided. The method includes providing a carbon-containing resin material having an appropriate concentration of catalyst particles. Thereafter, the resin material may be extruded through an aperture while being exposed to a high temperature range to permit polymerization of the extruded resin material. A subsequent exposure of the extruded resin material to another elevated temperature range causes carbon in the resin material to couple to the catalyst particles to promote carbon nanotube growth and transformation of the resin material to a reinforced composite material. Reinforced composite materials are also provided.

The invention relates to a nucleic acid aptamer electrochemical sensor based on metal organic framework materials (MOFs) as signal probes. The senor is used for detection of beta-amyloid (A beta) oligomers and belongs to the technical field of functional nanocomposite materials and biosensor detection. AuNFs-modified glassy carbon electrodes immobilize a first layer of aptamers, the A beta oligomer is further identified and through combination with second layer aptamer-modified gold nanoparticle-loaded Cu-MOFs (AuNPs/Cu-MOFs), the sandwich electrochemical sensor for detection of the A beta oligomer is formed. AuNPs/Cu-MOFs as a redox medium can directly detect a Cu<2+> signal and electrochemically active molecule labeling is avoided so that the detection processes are greatly simplified and the sensitivity of detection is improved.

The invention discloses a method for preparing a high-stability microbial electrochemical sensor. The microbial electrochemical sensor consists of an organic glass or polytetrafluoroethylene container with a volume of 20 to 1,570mL, a 0.1 to 10cm<2> glassy carbon or graphite working electrode, an Ag/AgCl or saturated calomel reference electrode, a 1cm<2> platinum sheet or platinum wire counter electrode and a weak alkaline solution of dopamine hydrochloride. The prepared microbial electrochemical sensor is used for a monitoring system for rapidly acquiring water body composition information in situ, and a monitoring result of the monitoring system in an extreme environment of a high-concentration organic solvent, a strong acid, high temperature and low temperature is true and effective. The method has the beneficial effects that the defect that a conventional microbial electrochemical system cannot run in the extreme environment of the strong acid, high temperature, low temperature, a high-concentration organic solution and the like is overcome by using the microbial electrochemical sensor, and a novel microbial electrochemical system is stable in running and rapid and accurate in detection.

The invention relates to a DNA (Deoxyribonucleic Acid) electrochemical biosensor and a preparation method thereof. The preparation method comprises the following steps: (1) adding 1mg/mL Gr-WS2 composite material aqueous dispersion liquid into 1mg/mL chitosan acetic acid solution; carrying out ultrasonic dispersion for 1 hour; and taking 8 microliters of a mixed solution, dripping the solution on a pre-treated glassy carbon substrate and airing; and (2) immersing an electrode into a gold size for 12 hours; washing and airing; reacting the electrode with 1.0*10<-6>mol/L of a DNA probe at 25 DEG C for 10 hours; and washing and sealing by using 1.0*10<-3>mol/L of mercaptoethanol for 2 hours and then reacting with a target DNA at 30 DEG C for 50 minutes to prepare the DNA electrochemical biosensor. According to the DNA electrochemical biosensor provided by the invention, a Gr-WS2 nano composite material and gold nanoparticles are combined so as to be good for simultaneously expressing the advantages of the Gr-WS2 nano composite material and the gold nanoparticles; the DNA electrochemical biosensor has the advantages of good stability, high sensitivity, good selectivity, good repeatability, convenience for carrying, low cost and the like.

The invention relates to a method for preparing composite thin plate based on glass carbon and a carbon nanotube, belonging to the technical field of a composite material. The composite thin plate based on the glass carbon and the carbon nanotube is obtained through carbonizing a polyimide Precursor film at the temperature lower than 2500 DEG C. The intensity of the composite thin plate prepared by the invention can reach above 600 MPa.

An anti-reflection structure body comprises a base member which is made of glassy carbon and at a surface of which is formed an anti-reflection structure including a cluster of minute projections each having a diameter that contracts towards a tip thereof. The minute projections preferably have an average height of from 200 nm to 3000 nm and an average maximum diameter of from 50 nm to 300 nm, and an average pitch of from 50 nm to 300 nm. An anti-reflection structure body which is easily produced, capable of achieving an anti-reflection effect near to non-reflection, and capable of providing the minute structure even to a member having a high melting point such as quartz glass or the like by transfer or the like can be provided.

The invention provides a preparation method of water hyacinth-Fe biochar and application of the water hyacinth-Fe biochar. The preparation method comprises the following steps: taking water hyacinth as a raw material and cultivating the water hyacinth with plant solution for one month, so as to obtain water hyacinth enriching 4-64 mg.L<-1> of Fe; performing low pyrolysis on the Fe-enriched water hyacinth at the temperature of 500-900 DEG C in a nitrogen atmosphere, so as to prepare a series of Fe-loaded water hyacinth biochar with different concentrations. A result shows that the water hyacinth biochar is rough in surface and has a lumpy structure on the surface, and Fe in the biochar exists in forms of two oxides: Fe2O3 and Fe3O4. A glassy carbon rotating disk electrode modified by various biochar particles is utilized to explore the electrocatalytic reduction reaction of H2O2 in a neutral medium on different biochar catalysts according to a cyclic voltammetry scanning method, the exploration discovers that a water hyacinth biochar sample has the maximum reduction current value and is most excellent in electro-catalytic property on H2O2, and different scanning experiments also verifies that the water hyacinth biochar sample also has the potential property of energy storage.