30results about How to "Stable preparation performance" patented technology

The invention relates to a carbon coated lithium iron phosphate microwave-synthesizing method, relating to the preparation of anode material of a Li-ion battery. The invention weighs lithium carbonate, iron oxalate and ammonium diacid phosphate, proper amount of heat conduction agent and organic matter in chemical gauging ratio, using anhydrous alcohol as dispersant to fully grind and mix them, drying and pressing the mixture into blocks, placing the blocks in a pot holding activated carbon, and placing the pot in microwave field for irradiative heating so as to be able to make uniform- phase carbon coated lithium iron phosphate. The invention can realize carbon coating of lithium iron phosphate and more rapidly and uniformly heat the raw materials, beneficial to uniform and rapid reaction of massive raw materials. The method can shorten production cycle and reduce energy consumption.

The invention provides a microwave synthesis method of nano-lithium iron phosphate. The method mainly makes the primary particles nanometerized, the secondary particles micronized, and then performs rapid sintering and synthesis through microwaves to obtain nanometer lithium iron phosphate with uniform phase. On the one hand, it solves the disadvantages of the uneven particle size of the solid-phase method, and can achieve molecular-level mixing to obtain products with uniform particle size, achieve nanometerization of primary particles, micronization of secondary particles, and improve ion transmission rate, thereby improving its electrical conductivity. . On the other hand, through microwave sintering, the raw materials are evenly heated to obtain nano-lithium iron phosphate with uniform phase, and the sintering time is greatly reduced, saving a lot of resources and achieving the purpose of energy saving and emission reduction.

The invention discloses a carbon-loaded silica nano-particle structure as well as a preparation method and an application thereof. The carbon-loaded silica nano-particle structure is characterized in that partial silicon atoms in the silica nano-particle form silicon-carbon chemical bonds on an interface with carbon; more than 50 percent of silica nano-particles are anchored onto an a-b base plane of the carbon through the silicon-carbon chemical bonds. The preparation method comprises following steps: mixing nano SiO2 (silicon dioxide), metal magnesium powder and carbon carriers, wherein the mixing method includes a direct mixing method or a method of loading the nano SiO2 onto the surface of the carbon carrier and then mixing the carbon carrier with magnesium powder; carrying out ball milling on the mixture through a ball mill in an inert gas atmosphere or vacuum condition so as to further uniformly mix the mixture; heating the mixture under the inert gas atmosphere to generate chemical reaction with SiO2, and reducing the SiO2 to be silicon; removing the reaction byproduct MgO (magnesium oxide), unreacted magnesium and insoluble impurities in an acid pickling manner; heating the mixture under the inert gas or vacuum condition, so that the silicon nano-particles react with the carbon on the interface, and the silica nano-particles are fixed on the surface of the carbon through the chemical bonds. The carbon-loaded silica nano-particle structure, the preparation method and the application are simple, feasible, low in cost and applicable to industrialized production.

The invention discloses a treatment agent specially used for treating domestic waste leachate. The treatment agent is a chemical treatment agent. The invention aims at providing the treatment agent specially used for treating domestic waste leachate. The invention adopts a technical scheme 1 comprising the key points that: the agent is a product compounded by using main materials of polyaluminum ferric chloride (PAFC) and poly dimethyl diallyl ammonium chloride (PDMDAAC), and an auxiliary material of tap water. The agent is specially placed in an aeration tank, and is used for carrying out decolorization, flocculation and disinfection upon causticized liquid, such that subsequent treatment sections such as deposition are facilitated, and water quality after reverse osmosis membrane treatment can reach national first or second grade discharge standard. When polyquaternium salt is added into the raw materials in the technical scheme 1, a technical scheme 2 is formed. When the product is added into a causticization tank and is used in disinfection, decolorization, and flocculation upon raw leachate liquid, substantial effect is provided. The two products are used in cooperation, and cannot be used for replacing each other. The treatment agent provided by the invention has a simple structure.

The invention relates to an immunoassay kit for detecting ethopabate, and a preparation method and application thereof, belonging to the field of immunological detection. The kit comprises an ELISA plate coated with an ethopabate antigen, an ethopabate monoclonal antibody solution, an enzyme-labeled or fluorescently-labeled goat anti-mouse secondary antibody, a standard ethopabate solution, a washing solution and a diluent, wherein the ethopabate antigen is a conjugate of ethopabate semiantigen and a vector, and the vector is one or two selected from a group consisting of ovalbumin, bovine serum albumin, thyroid protein, hemocyanin, human serum albumin and polylysine. When applied to detection of ethopabate residues in animal food, the kit has the advantages of high sensitivity, precision and accuracy, good specificity, low cross-reaction rate, good stability, long storage time, easy operation, quickness and suitability for on-site primary screening of large quantities of samples, and is beneficial for simplifying residue analysis of ethopabate.

The invention discloses a two-dimensional conjugated BDF organic micro-molecular photovoltaic material, and a preparation method and an application thereof. Two-dimensional conjugated BDF organic micro-molecules with the structure represented by formula (I) are obtained by connecting a thiophene conjugate side chain-containing benzo[1,2-b;3,4-b]difuran (BDF) unit with another aryl heterocycle through a Stille coupling technology. The organic micro-molecular photovoltaic material has wide visible region absorption, suitable HOMO and LUMO energy levels and narrow band gap. Organic solar cells are produced by using the organic molecules as an electron donor and PC61BM as an electron receptor, the maximum energy conversion efficiency of the organic solar cells reaches up to 3.7%, and the organic solar cells have a good photoelectric conversion efficiency.

The invention relates to a method for preparing lithium battery anode material, in particular to a method for preparing lithium manganate anode material. The method is characterized by comprising the following steps of: (1) adding soluble lithium salt, manganic compound and doping agent into deionized water for stirring according to a mol ratio of (0.5-0.65):(1-1.2):(0.01-0.02); (2) spraying pyrolyzing the obtained mixed liquid according to a spraying dryer; (3) placing the mixed liquid into a microwave sintering furnace, heating for 6-8 hours under 2-4kW, and keeping for 5-8 hours under 800-1000W so as to obtain lithium manganate; and (4) washing by pure water and filtering for at least three times, drying under 130-150 DEG C, and screening by a 200-mesh sieve so as to obtain the lithium manganate anode material. According to the method, the material is directly heated through microwave sintering, so that the material is evenly heated, and the particles are uniform; the crystallinity is better; the product quality is improved; and the method is good for preparing lithium manganate with stable performance.

The invention relates to an efficient preparation method for a skutterudite thermoelectric material through laser. The efficient preparation method comprises the steps that 1, according to the chemical formula of the skutterudite thermoelectric material, pure metal powder is weighed to serve as raw material powder and is put into a graphite matrix after being uniformly mixed; 2, the graphite matrix loaded with the raw material powder is put into an inert atmosphere, and the raw material powder is heated through the laser melting technology, melted along with movement of laser spots and then condensed, so that a cast ingot is obtained; and 3, the cast ingot prepared in the step 2 is ground into powder, the cast ingot powder is sintered through spark plasmas, and thus the skutterudite thermoelectric material is obtained. According to the efficient preparation method for the skutterudite thermoelectric material through the laser, the local powder is heated through the high-energy laser, rapid melting is achieved, and the loss of Sb phases is reduced; then, small-capacity melt is rapidly condensed, and the segregation size is decreased; and subsequently, the SPS short-time heat treatment process is combined, so that efficient preparation of the skutterudite thermoelectric material is achieved.

The invention relates to the technical filed of preparation of composite coatings and discloses a preparation system and method for a multi-element composite coating. The preparation system comprises a plurality of arc sources, a magnetic field pipeline and a vacuum cavity, wherein the multiple arc sources are used for arcing various target materials respectively to generate various kinds of plasma correspondingly and making the various kinds of plasma move; the magnetic field pipeline is used for evenly mixing the various kinds of plasma through magnetic field constraint and making the various kinds of plasma reach the surface of a base body to be machined at the same time, and one end of the magnetic field pipeline is communicated with the corresponding arc source; the vacuum cavity is communicated with the other end of the magnetic field pipeline, the base body to be machined is placed in the vacuum cavity, and the various kinds of plasma enters the vacuum chamber and impacts the surface of the base body to be machined under the action of bias voltage, so that the multi-element coating is formed. According to the preparation system and method for the multi-element composite coating, the plasma generated by the multiple pure metal target materials is evenly mixed through the magnetic field mixing technique, and the surface of the base body to be machined is impacted at an accelerated speed through the plasma, so that the multi-element alloy coating is formed, and the purpose of preparing the coating which is stable in performance and uniform in element at a low cost is achieved.

The invention discloses a two-dimensional conjugated benzodithiophene and furan and pyrazine copolymer, a preparation method and application thereof. The structural formula of the copolymer is as shown in the description, wherein R is alkyl. The two-dimensional conjugated benzodithiophene and furan and pyrazine copolymer is an electron donor material, is applied to a polymer solar cell, and has wide visible light region absorption, lower HOMO energy level, relatively narrower band gap and higher photoelectric conversion efficiency.

The invention relates to the technical field of polymer photovoltaic materials, in particular to a fluorine-containing two-dimensional conjugate benzo-difuran and pyrazine copolymer photovoltaic material, and a preparation method and application thereof. The structural formula of the fluorine-containing two-dimensional conjugate benzo-difuran and pyrazine copolymer photovoltaic material is shown as follows (please see the specifications for the formula), wherein R is an alkyl group. A copolymer is an electronic donor material, and the fluorine-containing two-dimensional conjugate benzo-difuranand pyrazine copolymer photovoltaic material is applied to a polymer solar cell, has wide visible region absorption, the low HOMO energy level, the relative narrow band gap and the high photovoltaicconversion efficiency.

The invention discloses a carbon-loaded silica nano-particle structure as well as a preparation method and an application thereof. The carbon-loaded silica nano-particle structure is characterized in that partial silicon atoms in the silica nano-particle form silicon-carbon chemical bonds on an interface with carbon; more than 50 percent of silica nano-particles are anchored onto an a-b base plane of the carbon through the silicon-carbon chemical bonds. The preparation method comprises following steps: mixing nano SiO2 (silicon dioxide), metal magnesium powder and carbon carriers, wherein the mixing method includes a direct mixing method or a method of loading the nano SiO2 onto the surface of the carbon carrier and then mixing the carbon carrier with magnesium powder; carrying out ball milling on the mixture through a ball mill in an inert gas atmosphere or vacuum condition so as to further uniformly mix the mixture; heating the mixture under the inert gas atmosphere to generate chemical reaction with SiO2, and reducing the SiO2 to be silicon; removing the reaction byproduct MgO (magnesium oxide), unreacted magnesium and insoluble impurities in an acid pickling manner; heating the mixture under the inert gas or vacuum condition, so that the silicon nano-particles react with the carbon on the interface, and the silica nano-particles are fixed on the surface of the carbon through the chemical bonds. The carbon-loaded silica nano-particle structure, the preparation method and the application are simple, feasible, low in cost and applicable to industrialized production.

The invention discloses a method for preparing a single-walled carbon nanotube and an all-carbon heterojunction by taking graphene as a catalyst, which comprises the following steps: step 1, processing a growth substrate: s1, ultrasonically cleaning a growth substrate in ultra-pure water, acetone, ethanol and ultra-pure water in sequence; s2, blowing the growth substrate by high-purity nitrogen to dry the growth substrate; and s3, putting the cleaned substrate into a muffle furnace, performing high-temperature annealing in air, heating to 900 DEG C within 2 hours, keeping the temperature at 900 DEG C for 8 hours, cooling to 300 DEG C within 10 hours, and naturally cooling; step 2, mechanically stripping graphene on the treated growth substrate, wherein the number of layers is 1-10; step 3, growing a carbon nanotube on the substrate deposited with the graphene, and introducing hydrogen and a carbon source into a chemical vapor deposition system to grow a single-walled carbon nanotube; and 4, making the all-carbon heterojunction provided by the invention into a field effect transistor device according to the following preparation process. The single-walled carbon nanotube does not contain metal in the preparation process, and can be used for preparing a field effect transistor device with stable performance.

The invention discloses a benzodithiophene and pyrazine copolymer, a preparing method and application. The structural formula of the copolymer is shown as follows, wherein R is alkyl groups. The copolymer serves as an electron donor material, is applied to polymer solar cells, and has a wide visible region absorption range, a low HOMO level, a relatively-narrow bandgap and high photoelectric conversion efficiency.

The invention discloses a benzodifuran containing chlorine and pyrazine copolymer photovoltaic material, a preparation method and an application. A structural formula is as shown in the specification,wherein R is an alkyl group. The copolymer is an electron donor material, and is applied to a polymer solar battery, and the material has wide absorption in the visible region, a relatively low HOMOlevel, a relatively narrow band gap, and relatively high photoelectric conversion efficiency.

The invention discloses a [2.1.3] benzoselenadiazole photovoltaic material as well as a preparation method and application thereof, belonging to the technical field of photovoltaic materials. The structure of the [2.1.3] benzoselenadiazole photovoltaic material is shown in the formula (I). The invention also provides the preparation method and application of the [2.1.3] benzoselenadiazole photovoltaic material. In preparation of the photovoltaic material, a stille coupling method is mainly used for connecting a [2.1.3] benzoselenadiazole unit with another electron donor unit thiophene benzofuran through carbon-carbon single bonds, so as to obtain a [2.1.3] benzoselenadiazole organic small molecule material. The synthetic route is simple, the cost is low, and the synthetic method has universality and can be better popularized and applied to synthesis of other [2.1.3] benzoselenadiazole materials; the [2.1.3] benzoselenadiazole photovoltaic material has a larger conjugated structure and is hopeful to obtain wider ultraviolet-visible absorption spectrum and carrier mobility; and the [2.1.3] benzoselenadiazole photovoltaic material has a lower HOMO level, has high stability to oxygen, and is favorable for preparing a solar battery device with more stable performance. The structural formula is shown in the specification.

The invention discloses a benzodifuran organic small molecule photovoltaic material as well as a preparation method and application thereof. The preparation method comprises the steps of synthesizing a benzo[1,2-b;3,4-b]difuran (BDF) organic electron donor unit containing different alkoxy side chains, and linking the BDF unit with another electron donor unit diketopyrrolopyrrole (DPP) through a carbon-carbon single bond by virtue of a Stille coupling method, so as to obtain the BDF type organic small molecule photovoltaic material, wherein the structure of the BDF type organic small molecule photovoltaic material is represented by the formula (I). The organic small molecule photovoltaic material has a wide visible area absorption range, proper HOMO and LUMO energy levels and a relatively narrow band gap. An organic solar cell is prepared by taking organic molecules as an electron donor and PC61BM or taking an organic matter electron acceptor as an electron acceptor, the highest energy conversion efficiency of the organic solar cell can reach 5.0%, and the organic solar cell has good photoelectric conversion efficiency. The formula is as shown in the specification.

The invention discloses a difuronaphthalene photovoltaic material as well as a preparation method and application thereof, and belongs to the technical field of photovoltaic materials. The structure of the difuronaphthalene photovoltaic material is represented by a formula (I). The difuronaphthalene photovoltaic material is mainly prepared by linking a difuronaphthalene unit with another aromatic heterocycle or a derivative of the aromatic heterocycle through a carbon-carbon single bond by virtue of a stille coupling method. A synthetic route is simple and low in cost, and a synthetic method has universality and can be widely popularized and applied to synthesis of other difuronaphthalene materials. The prepared difuronaphthalene photovoltaic material has a big-pi-plane conjugate structure, so that a relatively wide ultraviolet-visible absorption spectrum can be obtained; the prepared difuronaphthalene photovoltaic material has a relatively low HOMO energy level and high oxygen stability and is beneficial to preparation of solar cell devices with relatively stable performance; the difuronaphthalene photovoltaic material has a good photovoltaic conversion function when being applied to solar cells. The structural formula (I) is as shown in the description.