86results about How to "Improve electrical activity" patented technology

Methods can include using a doorbell to wirelessly communicate with a remotely located computing device. Doorbells can include a speaker, a microphone, a camera, and a button to sound a chime. A doorbell shipping mode can detect whether the doorbell is electrically coupled to an external power source. Methods can include entering a setup mode or a standby mode in response to detecting electricity from the external power source.

Methods can include using a doorbell to wirelessly communicate with a remotely located computing device. Doorbells can include a speaker, a microphone, a camera, and a button to sound a chime. Some embodiments include using a doorbell to close an electrical circuit that has a sound output device in a way that precludes the sound output device from inappropriately emitting a notification sound.

The invention discloses a carbon nanosphere / sulfur composite and a preparation method and application thereof. The carbon nanosphere / sulfur composite comprises a carbon nanosphere and elemental sulfur; the carbon nanosphere is composed of petal-shaped carbon plates which are combined into a sphere shape, gaps exist between the carbon plates, and the carbon plates are arranged in a wrinkled form and provided with through holes; the elemental sulfur and the carbon nanosphere are combined through a fusion permeation method to form the carbon nanosphere / sulfur composite, wherein sulfur accounts for 75-84 wt% of the composite. The gaps and through holes in the carbon nanosphere facilitate fusion loading of sulfur and dispersion and transportation of electrolyte ions, and the carbon nanosphere with a large specific surface area can load more sulfur active substances and effectively inhibit dissolution of polysulfide; the nitrogen element is doped on the carbon nanosphere to improve the electroactivity of a carbon material and enhance physisorption on sulfur; the carbon nanosphere / sulfur composite can serve as a positive electrode of a lithium-sulfur battery to improve the capacity, rate capability, cycling stability and coulombic efficiency of the lithium-sulfur battery.

The invention discloses a cellulose / carbon nano tube composite nanofiber membrane preparation method, and belongs to an electroactive material preparation technology. The method comprises the following processes of: firstly, acidizing carbon nano tubes so as to enable CNT-COOH to be generated on the surfaces of the carbon nano tubes, and dispersing the carbon nano tubes into deionized water to prepare a carbon nano tube solution; dissolving bacterial cellulose into trifluoroacetic acid so as to obtain a transparent light-yellow bacterial cellulose trifluoroacetic acid solution; and mixing the carbon nano tube solution with the bacterial cellulose trifluoroacetic acid solution and electrospinning, wherein the high-voltage electrostatic regulation scope is 10-30kV, the flow rate of an injection pump is 0.05-0.3mL / h, and the receiving distance is 10-20cm. The preparation method is simple in process, and an obtained cellulose / carbon nano tube composite nanofiber membrane has the advantages of high electric conductivity and good electroactivity.

The invention discloses a preparation method of nano-fiber poly-aniline. In the method, an aniline monomer and inorganic acid are used as raw materials to prepare the nano-fiber poly-aniline through oxidative polymerization by using an electrochemical unipolar pulse method under a room temperature condition. The preparation method is simple to operate, needs no oxidant and gets rid of secondary pollution caused by the oxidant. A product prepared by the method has high electrochemical stability and super capacitive performance.

The invention relates to a process for preparing a power type lithium-ion battery anode material by using a supercritical / subcritcal water thermal process. The process comprises the following steps of: (1) continuously injecting two fluids of a raw material lithium source and a mixed liquid consisting of an iron source / manganese source and a phosphoric acid source into a mixer for mixing; (2) preheating a third fluid formed by deionized water, and adding the third fluid into the mixer to be mixed with the two fluids in the step (1); (3) leading the mixed liquid of the three fluids discharging from the mixer in the step (2) to enter a high temperature and high pressure reaction kettle for carrying out hydrothermal crystallization reaction; (4) cooling a product liquid obtained from the hydrothermal crystallization reaction through a heat exchanger, filtering by a filter to remove large-grain particles and impurities, and leading the filtrate into a solid-liquid separator; (5) continuously collecting particles precipitated in the solid-liquid separator, and drying to obtain dry powder of the battery anode material. The process can be carried out continuously and is beneficial to improving the operation efficiency and reducing the energy consumption.

The invention discloses an electrochemical detection method for a pesticide imidacloprid based on a polypyrrole / reduced graphene oxide (PPy / RGO) modified glassy carbon electrode. The method comprises the following steps: firstly, carrying out electrochemical reduction to prepare the polypyrrole / reduced graphene oxide (PPy / RGO) modified glassy carbon electrode; and secondly, utilizing the prepared PPy / RGO modified glassy carbon electrode to the electrochemical detection of the pesticide imidacloprid. The PPy / RGO modified glassy carbon electrode provided by the invention has high sensitivity, good stability, wide linear range and low detection limit on the detection of the imidacloprid.

An electrochemical method and system for removing nitrate and ammonia in effluents, using an undivided flow-through electrolyzer, said electrolyzer comprising at least one cell, each cell comprising at least one anode and one cathode, the cathode being in a copper / nickel based alloy of a high corrosion resistance and a high electroactivity for nitrate reduction to ammonia and the anode being a DSA electrode of a high corrosion resistance and a high electroactivity for ammonia oxidation to nitrogen in presence of chloride.

The invention discloses an immuno-electrochemical paper chip. The immuno-electrochemical paper chip comprises a bottom plate, a reference electrode layer and a working electrode layer, wherein the working electrode layer comprises a plurality of central shunting regions, a plurality of micro-channels, a detection region and a plurality of working electrodes; each micro-channel is used for leading a sample to be detected from the detection region to the corresponding central shunting region; each working electrode is positioned in the corresponding central shunting region; different antibodies are fixed onto the surfaces of the working electrodes and are used for performing multi-parameter joint detection on FSH, LH and E2 respectively. The immuno-electrochemical paper chip is in a multi-layer combined design, functions of sampling, separating, immuno-detection and the like are achieved on a single paper chip, the operation is simple, and the detection is rapid; meanwhile, an electrochemical immuno-detection method is directly adopted, secondary antibodies do not need to be added, needed reagents are few, and manual operation errors can be reduced.

A Fe / Co / N / MWCNTs catalyst is obtained as follows: an iron-ion-doped polyaniline (PANI) and carbon nanotube (MWCNT) compound is heated at 900DEG C to obtain an iron-containing catalyst FeNC; and the FeNC containing a cobalt salt is calcined at different temperatures to obtain the composite catalyst FeCoNC. With the increase of calcination temperature, the surface structure of the catalyst tends tobe uniform. The surface structure of the catalyst with the calcination temperature of 500DEG C is most even and smooth, and sintering occurs when the temperature is above 500DEG C. A higher nitrogen content can improve the ORR electroactivity of the catalyst. The catalyst with the calcination temperature of 500 DEG C has highest ORR electrocatalytic activity. ORR initial potentials in acidic and alkaline solutions are 0.63 and-0.12V (vsSCE), respectively, current densities are 11.67 and 9. 83mAmg-1@-0.3V(vsSCE) respectively, and the catalyst has good thermal stability and catalytic activity stability. The catalyst obtained by stepwise adding Fe and Co and calcining at 500 DEG C after addition of the Co has excellent ORR electrocatalytic activity.

The invention discloses a nano-composite material used for tissue repair, which comprises segmented copolymer with electrical activity, nano-hydroxyapatite and normal tissue repair materials; wherein the segmented copolymer comprises aliphatic polyester and ailine pentamer, and the normal tissue repair materials comprises poly (lactide-co-glycolide), polylactide or polycaprolactone. The invention also discloses a preparation method of the nano-composite materials used for tissue repair, which comprises the following steps of: (a) dissolving the normal tissue repair material in a solvent, then adding the nano-hydroxyapatite into the solvent, and uniformly stirring to obtain a substrate material; and (b) dissolving the segmented copolymer into the solvent, then adding to the substrate material and mixing uniformly, and then precipitating and removing the solvent. The nano-composite material used for the tissue repair has the advantages of nontoxicity, biodegradability, processibility, sufficient mechanical strength, favorable electrical activity, and biocompatibility.

The present invention provides a conducting polymer, a synthesis method thereof, and an electroactive electrode covered with the said conducting polymer. The conducting polymer is synthesized as follows: use the polybasic acid as dopant and crosslinking agent, and polymerize monomers into conducting polymer hydrogel. The monomers are selected one or more from pyrrole or its derivatives, thiophene or its derivatives, aniline or its derivatives. The acid group of the polybasic acid contains phosphate or polybasic acid which contains at least two substituents per molecule selected from sulfate, nitrate or carboxylic in which the molecular weight of at least one acid group is no more than 800. The mole ratio of the acid group in polybasic acid to monomers of the conducting polymer is 1:12-12:1. The preparation applied in the invention is simple, and need not to import any impurity. The conducting polymer hydrogel has high ionic conductivity, super hydrophilicity, and good biocompatibility.

The invention discloses an integrated system for solar-driven microbial electrolysis cell strengthening treatment on rural domestic sewage. In the system, the integrated device comprises an anaerobic tank, a facultative tank, an aerobic tank and a secondary sedimentation tank. Each two zones are separated by a stainless steel plate and the stainless steel plates are communicated at intervals from top to bottom. The bottom of the anaerobic tank is provided with a water inlet. The top of the sedimentation tank is provided with a water outlet. An aeration head is arranged in the aerobic tank and is connected to an air pump. A guide plate and a mud guard are arranged in the secondary sedimentation tank. A sludge outlet of the secondary sedimentation tank is connected to a sludge flowing direction inlet of the aerobic tank by a sludge reflux pump. An anode carbon felt is arranged in the anaerobic tank. A cathode carbon felt is arranged in the aerobic tank. An anode and a cathode are connected to a storage battery by stainless steel wires. A solar cell panel provides powder for the storage battery. The integrated system greatly improves the original biological treatment technology, reduces an operation cost by natural solar energy and provides a novel rural domestic sewage treatment technology.

The invention provides an amide polymer derived one-dimensional nitrogen-doped nano-carbon electrode material and a preparation method. The one-dimensional nitrogen-doped nano-carbon electrode material, which can be used as an electrode material of a lithium / sodium ion battery and a super capacitor, is prepared, so that the original amide engineering plastic with a low added value can be used in the field of green energy, the cost is effectively reduced, and the electrochemical performance is improved. The one-dimensional nitrogen-doped nano-carbon electrode material is characterized in that the one-dimensional nitrogen-doped nano-carbon electrode material is prepared by the raw material of an amide polymer or an amide polymer composite material through high-temperature carbonization underthe protection of an inert gas, wherein the amide polymer is an amide polymer with a one-dimensional nano structure, which is obtained by carrying out low-temperature salification on anhydride and amine monomers and then carrying out solvothermal reaction; the amide polymer composite material is an amide polymer composite material with a one-dimensional nano structure obtained by carrying out low-temperature salification on anhydride and amine monomers, mixing salt with a one-dimensional carbon nano material and carrying out solvothermal reaction.

The invention provides a soluble electroactive polymer prepared from aniline pentamer crosslinked chitosan with two terminated carboxyl groups, and a preparation method. The invention provides a series of crosslinked polymer containing electroactive aniline pentamer, which are synthesized from aniline pentamer with two terminated carboxyl groups via two synthesis methods, wherein the first synthesis method condensates activated carboxyl group of aniline pentamer with amido of chitosan in the mixture solvent of acetate water solution and organic solvent to obtain product, and the second method condensates protected chitosan and aniline pentamer in organic solvent to obtain product. The crosslinked chitosan has the advantages of aniline pentamer and natural macromolecule, has electric activity and biological activity, which can be dissolved in acid water solution, be degraded biologically, while the degraded product can be discharged externally. The inventive product is mainly used as biological medical material, particularly as tissue engineering scaffold material of nerve and heart.

The invention provides grafted copolymer which is provided with a structure represented by the formula (1) or the formula (II). The grafted copolymer has good water solubility and good electrochemistry response characteristics due to the fact that the grafted copolymer is provided with electroactive aniline oligomer segments. Prepared grafted copolymer is adsorbed to the surfaces of materials which are subjected to preprocessing layer by layer so as to obtain the layer-by-layer decorative materials which have an adjustable composite layer number and good electroactivity. The layer-by-layer decorative materials, used as biomedical polymer materials, can be better applied to the field of tissue engineering like artificial organs or tissue repair representing by the formula (1) or the formula (II).

The present invention relates to a shell core type Poly(3,4-ethylenedioxythiophene) / polyethelene alcohol fiber composite film, and a preparing method thereof. The preparing method comprises the following steps: preparing a polyvinyl alcohol water solution, adding sodium lauryl sulfate into the solution, finally adding ethylenedioxythiophene monomer, ultrasonic dispersing and then mixing for forming the homogeneous emulsion. The emulsion is executed with electrostatic spinning for obtaining the fiber with the uncontinuous shell core type spindle-shaped structure, wherein the ethylenedioxythiophene monomer is positioned at the core layer. The spinning film is placed into the chlorine for sealed-placing for 24h for polymerizing the ethylenedioxythiophene monomer of the core layer and obtaining the pale-blue film. The invention has the advantages of: simple and feasible method, realized polymerization in the nanometer reactor composed of spinning fiber shell layer, high concentration of PEDOT in the final film up to 45% (w / w PVA), and better electroactivity. Furthermore the shell core type Poly(3,4-ethylenedioxythiophene) / polyethelene alcohol fiber composite film of the invention is synthesized with the bioavailability of the PVA and is likely used for the field of biological sensor.

This invention relates to a new process for the extraction and elimination of deleterious material present in natural manganese dioxide (NMD), as well as in natural manganese dioxide obtained by such process. The process involves treating NMD with a HCl and water mixture in a reactor while stirring and heating the mixture. The heating temperature of the reactor is maintained in a predetermined range. The reactor is then fed with an amount of crushed NMD ore. A leaching reaction of said NMD ore with the HCl is produced by leaching for a period of time. Subsequently, the contents of the tank are filtered, washed and dried to recovery the concentrate of manganese dioxide substantially free of deleterious material.

The invention provides a synthetic method of electrode material polyaniline. The synthetic method comprises the following steps of: (a) dissolving aniline into a perchloric acid solution, and reacting at below 10 DEG C in the presence of ferric sulfate or manganese dioxide, thereby obtaining reaction liquid; and (b) dropping a perchloric acid solution with dissolved ammonium persulfate in batches in the reaction liquid obtained from the step (a), and reacting continuously at below 10 DEG C, thereby obtaining the electrode material polyaniline. According to the invention, ferric sulfate or manganese dioxide as well as ammonium persulfate are taken as oxidizing agents for complex use; perchloric acid is taken as a reaction medium, and the reaction temperature is controlled to be below 10 DEG C; the synthetic technology enables the productivity and capacity of polyaniline during the whole synthetic process to be much high, solves the problems of low productivity and poor capacity of a traditional method, and is suitable for industrial production; and further, according to the invention, activated carbon with excellent conductivity and adsorption is added during the synthetic process, so that a traditional chemical oxidation method is changed into an electrochemical oxidation method, and meanwhile, the utilization ratio of the electrode material is improved.

The invention discloses a preparation method of nano-fiber poly-aniline. In the method, an aniline monomer and inorganic acid are used as raw materials to prepare the nano-fiber poly-aniline through oxidative polymerization by using an electrochemical unipolar pulse method under a room temperature condition. The preparation method is simple to operate, needs no oxidant and gets rid of secondary pollution caused by the oxidant. A product prepared by the method has high electrochemical stability and super capacitive performance.

The present invention relates to a composite (13), characterized in that it comprises:at least one ferroelectric organic polymer with relaxation properties, andat least one phthalate-based plasticizer.

An electrode plate for a battery comprising a plurality of electrodes in a grid where the grid defines a plurality of spaces. A paste disposed in the spaces has a top surface and a bottom surface. The paste is narrowed in the space, defining a distance between the top surface of the paste and the bottom surface of the paste that is less than the thickness of the plate over the electrodes. A retention layer of porous fabric is impressed on the top and / or bottom surface of the paste. Electrolyte disposed in electric communication with the electrodes.

Ferromanganese phosphate intermediates, lithium ferromanganese phosphate, and methods of making the same are disclosed. The intermediate has a chemical formula of (NH4)Mn(1-x-y)FexMyPO4.H2O, wherein the x is equal to 0.05 to 0.5 and y is equal to 0 to 0.2; the M is a divalent metal and is selected from one or more of Mg, Ca, Co, Mn and Zn. The intermediate has a crystal structure with an orthogonal structure, belongs to a Pmnm (59) space group, and has a two-dimensional nanosheet structure in product morphology.

The invention relates to an epoxy resin composite coating based on ZIF-L, a preparation method and a coating product, and relates to the technical field of coatings and surface coatings. According to the main technical scheme, the ZIF-L-based epoxy resin composite coating is prepared from two-dimensional metal organic framework material ZIF-L nanoparticles, 8-hydroxyquinoline terminated aniline tripolymer and an epoxy resin coating body. In the ZIF-L-based epoxy resin composite coating, the mass fraction of the two-dimensional metal organic framework material ZIF-L nanoparticles is 0.1-10 wt%, and the mass fraction of the two-dimensional metal organic framework material ZIF-L nanoparticles is 0.1-10 wt%. The mass of the 8-hydroxyquinoline terminated aniline tripolymer is 5 to 50 percent of the mass of the two-dimensional metal organic framework material ZIF-L nano-particles. The invention is mainly used for providing and preparing the ZIF-L-based epoxy resin composite coating with excellent antibacterial, antifouling and anticorrosive properties and a coating product, can prevent gram-negative bacteria and gram-positive bacteria, and has good poisoning and anti-adhesion effects on chlorella, phaeodactylum tricornutum and navicula.

A method for co-integrating wimpy and nominal devices includes growing source / drain regions on semiconductor material adjacent to a gate structure to form device structures with a non-electrically active material. Selected device structures are masked with a block mask. Unmasked device structures are selectively annealed to increase electrical activity of the non-electrically active material to adjust a threshold voltage between the selected device structures and the unmasked device structures.

The invention discloses a nitrogen-doped barbed carbon nanosphere / sulfur composite material and a preparation method and application thereof. The composite material comprises sulfur and nitrogen-dopedbarbed carbon nanospheres serving as a sulfur host material, wherein the carbon nanosphere is formed by combining a plurality of nitrogen-doped needle-like carbon fibers according to a spherical shape, the lengths of the carbon fibers are different, all the carbon fibers are shot from the spherical edge to the spherical center to form barbed distribution, gaps exist between the carbon fibers, andthe carbon fibers are gathered to the center to form a cavity. Furthermore, 60-75wt% of sulfur supported by the nitrogen-doped barbed carbon nanospheres is applied to a lithium-sulfur battery as a positive electrode. Sufficient space is provided for sulfur volume expansion in the charging and discharging process by utilizing the internal cavity and the carbon fiber gaps; the carbon fibers with different lengths in the spheres can well disperse sulfur and adsorb polysulfide, so that the sulfur utilization rate is increased, and the polysulfide loss is inhibited; and the loss of polysulfide ions can be more effectively inhibited by doping carbon in the outer layer of nitrogen atoms, thereby effectively prolonging the cycle life of the lithium-sulfur battery and improving the capacity of thelithium-sulfur battery.

The invention belongs to the technical field of high polymer materials. The invention provides supramolecular hydrogel as well as a preparation method and application thereof. The preparation method of the supramolecular hydrogel comprises the following steps: mixing gelatin and pyrrole, and then adding an oxidizing agent for polymerization to obtain a mixed solution; and adding tannic acid to the mixed solution for crosslinking, and the supramolecular hydrogel is obtained. Pyrrole is polymerized under the action of an oxidizing agent to obtain polypyrrole, and tannic acid contains rich phenolic hydroxyl groups. The preparation method is easy to operate and short in gelling time, and the prepared supramolecular hydrogel has good plasticity and electroactivity and can be self-healed at room temperature without being stimulated by external conditions. The supramolecular hydrogel has a three-dimensional porous structure, is beneficial to transmission of nutrient substances and electrons, has mechanical properties matched with nervous tissues, can be clinically applied to tissue engineering nerve conduits and damaged nerve repair, and has a great application prospect in the aspect of nerve injury repair.

The invention discloses a preparation method of a trace palladium-located catalyst. Meanwhile, the trace palladium-located catalyst has excellent catalytic activity for oxidation of ethanol. The preparation method comprises the following steps: firstly, loading nickel nanoparticles (nano-Ni / GP) with a certain size on the surface of graphene by using a two-dimensional film structure of the graphene; then making the nano-Ni / GP formed in this way react with a palladium chloride solution with a certain concentration, reducing Pd<2+> ions into palladium nanoparticles, oxidizing nickel into Ni<2+> and leaving from the surfaces of the nanoparticles to enter a solution; and performing in-situ uniform deposition on the formed palladium nanoparticles on the surfaces of unreacted nickel nanoparticles so as to form nickel nanoparticle-loaded palladium nanoparticles. Because the palladium nanoparticles are uniformly dispersed on the surfaces of the nickel nanoparticles, the dispersing degree of the palladium is extremely high; however, the palladium loading amount is very small; meanwhile, because the palladium nanoparticles are in mutual contact with the nickel nanoparticles, so-called 'dual-function effect' is formed, so that the electroactivity of the catalyst for the oxidation of ethanol is greatly enhanced.