78results about How to "Catalytic strong" patented technology

The invention relates to a manganese oxide-graphite phase carbon nitride composite photocatalytic material and a preparation method thereof. The manganese oxide-graphite phase carbon nitride composite photocatalytic material is prepared by depositing manganese oxide nanoparticles on the surface of layered graphite phase carbon nitride, and the manganese element loading capacity of manganese oxide in the composite photocatalytic material is 0.3-1.2 mol%; manganese dioxide or trimanganese tetroxide or dimanganese trioxide or a mixed oxide of manganese dioxide, trimanganese tetroxide and dimanganese trioxide is adopted as manganese oxide. Manganese oxide in the composite photocatalytic material is uniformly loaded on graphite phase carbon nitride, the loading capacity is controllable, the good catalytic capacity is achieved, a manganese oxide cocatalyst is closely combined with graphite phase carbon nitride, therefore, the defects that a single photocatalyst is high in photoproduced electron hole pair composite ratio and low in photocatalytic efficiency are effectively overcome, the solar utilization efficiency is greatly improved, and the excellent catalytic activity is achieved when the composite photocatalytic material is used for photocatalytic hydrogen production. The composite photocatalytic material has the wide application prospect in the fields of photocatalysis, electrochemistry, energy, environments and the like.

The invention relates to a preparation method of a thermometal methanation catalyst with high-temperature resistance, which comprises the following steps of: taking alumina as a vector, taking nickel oxide as a main active component, taking cobalt oxide as a second active component, taking lanthanum oxide as an adjuvant and mixing the above oxides evenly by adopting a double-hydrolyzing homogeneous-phase coprecipitation method of inorganic salt so as to prepare the methanation catalyst by filtering, washing, drying and calcining. The dispersion of each component in the catalyst is uniform, the stability and the coagulating resistance are good, the quick methanation of the catalyst can be realized by mixing with raw gas, and the catalyst can have the function of effectively resisting coagulation and accumulation in a high-temperature environment generated in the quick reaction process and has favorable catalytic capability at the temperature of 500 to 700 DEG C. The preparation method has short technological process, reasonable mixture ratio of materials and full and accurate data, is easy to operate and is a very ideal preparation method of the thermometal methanation catalyst with high-temperature resistance.

The invention provides a Ni / Au composite nanowire array enzyme-free glucose sensor electrode and a preparation method thereof. The preparation method comprises the following steps: carrying out conductive treatment on an anodic aluminum oxide template; carrying out the Au deposition in an anodic aluminum oxide conductive template, and then carrying out the Ni deposition; removing the anodic aluminum oxide conductive template deposited with Au and Ni to obtain a Ni / Au composite nanowire array; adhering one end of the Ni / Au composite nanowire array to the modified electrode, and carrying out potential ring scanning until a cyclic voltammogram is stable, thereby obtaining the enzyme-free glucose sensor electrode. According to the enzyme-free glucose sensor electrode, noble metal elements andnon-noble metal elements with different electronegativity are constructed into a double-layer nanowire structure by adopting an electro-deposition method, so the electrode current is obviously improved, the sensitivity of an enzyme-free glucose sensor is improved, and the problem of restricting the application limitation of the enzyme-free glucose sensor is solved.

The invention provides an ordered mesoporous gamma-MnO2 catalyst and a preparation method and application thereof. The preparation method comprises the following steps: S1. using mesoporous silica asa template, immersing the mesoporous silica in a manganese salt solution and drying , after preliminary calcination, repeatedly immersing and drying the mesoporous silica for 1 to 3 times, after finalcalcination, soaking the template in an alkali solution to obtain a mesoporous Mn2O3 precursor; and S2. adding the mesoporous Mn2O3 precursor to a mineral acid solution, and stirring under heating toobtain the ordered mesoporous gamma-MnO2 catalyst. The gamma-MnO2 catalyst with high low temperature activity is developed, the preparation process is simple and controllable, the energy consumptionis low, and the repeatability is good; the obtained gamma-MnO2 has an ordered mesoporous structure, a large specific surface area and a uniform mesoporous pore diameter, has good catalytic activity for catalytic combustion of toluene, can be applied to the catalytic elimination of volatile organic gases in air, and has important significance for atmospheric environmental protection.

The invention discloses a functional compound protein composition and a preparation method thereof. According to the functional compound protein composition and the preparation method thereof, soybean protein isolate, whey protein concentrate and phospholipids are utilized as main raw materials; low-temperature processing is performed on stevia rebaudiana so as to prepare a stevia rebaudiana extract to preserve active ingredients and biologically active ingredients of the stevia rebaudiana to the maximum extents; the prepared stevia rebaudiana extract is high in extraction rate, pure in flavor, natural in color and luster, and free of liquorice smell; the stevia rebaudiana extract and the main raw materials are scientifically compounded, and antifreeze polypeptides, dietary fiber powder, bee pupae enzymatic hydrolysate and wheat malt flour are added, so that the functional compound protein composition is prepared; and the prepared functional compound protein composition is appropriate in taste, good in solubility, whole in nutrition, good in biological activities and suitable for a wide range of people. The preparation method adopts a non-thermal processing technology, so that the preparation method is high in work efficiency, small in energy consumption, friendly to the environment and free of pollution; moreover, the preparation method reduces introductions of food additives and chemical additives, so that safety of the foods is effectively improved, qualities of the foods are improved and production costs are reduced. The preparation method of the functional compound protein composition realizes low-carbon production target, and is capable of realizing scale development and industrialized development.

The invention relates to a preparation method for a nano-alloy catalyst. The preparation method comprises the following steps of dissolving a guiding agent into an alkali solution, then adding a noble metal salt, noble metal acid and water to be stirred to obtain a mixed solution; adding a reducing agent to the mixed solution, continuing to stir to carry out a reduction action, and obtaining a turbid liquid after the reaction is completed; adding water to the turbid liquid, centrifuging, and washing precipitates, and adding alcohol to the precipitates, centrifuging and washing to obtain a black solid body; and collecting and drying the black solid body to obtain the nano-alloy catalyst. The preparation method for the nano-alloy catalyst provided by the invention is simple, convenient, rapid, safe and environment-friendly; and in addition, the prepared catalyst is high in activity, high in stability, and high in the catalysis capability for a fuel cell.

The invention relates to a preparation method of a ZIF-8 / enzyme composite material. The preparation method comprises the steps of regulating the concentration of a precursor to enable a ZIF-8 crystalto grow on the surface of an enzyme in a lamellar structure, mixing a metal salt water solution with a mixed solution of a ligand water solution and the enzyme, performing stirring at room temperaturefor a period of time, and separating out a solid product, and thereby obtaining the ZIF-8 / enzyme composite material. Different from a composite material obtained through a traditional method, the method does not depend on ducts of ZIF-8 to diffuse substrate molecules, and a large-size substrate makes contact with the active center of the enzyme through gaps between ZIF-8 lamellar structures, so that a catalytic reaction is completed. ZIF-8 nanoflowers growing on the surface of the enzyme can well protect the enzyme from reacting under harsh conditions, and meanwhile, the ZIF-8 / enzyme nanoflower composite material also has good circularity and storage capacity.

The invention discloses a two-dimensional metal organic framework nanosheet and a preparation method thereof. The preparation method comprises the following steps: adding a layered metal organic framework bulk material into a solvent, carrying out stripping under stirring, then carrying out standing to obtain a supernatant, and centrifuging the supernatant so as to obtain a precipitate, i.e., thetwo-dimensional metal organic framework nanosheet. The method provided by the invention can realize large-scale preparation of the two-dimensional metal organic framework nanosheet, and is convenientand practicable in operation. The two-dimensional metal organic framework nanosheet has a thickness of only 1 to 10 nm. The invention also discloses an application of the two-dimensional metal organicframework nanosheet in electrochemical detection of superoxide ions. Specifically, the two-dimensional metal organic framework nanosheet is made into a dispersion which is then subjected to drip-coating of an electrode, and then the superoxide ions are detected through a cyclic voltammetric method or / and an amperometric method. The two-dimensional metal organic framework provided by the inventionhas excellent electrocatalytic performance to the superoxide ions and is capable of converting the superoxide ions into water.

The invention discloses a construction method and application of a carbon nanotube-fullerene complex-based non-enzymatic electrochemical sensor. The manufacturing method of the sensor comprises the following steps of (1) pre-activating multi-walled carbon nanotubes (MWCNTs); (2) preparing a composite material (MWCNTs-ZnP-C60) of the multi-walled carbon nanotubes and zinc porphyrin fullerene (ZnP-C60); and (3) rousing the electrochemical activity of the MWCNTs-ZnP-C60 by virtue of tetraoctyl ammonium bromide (TOAB), modifying the MWCNTs-ZnP-C60 on the surface of a glassy carbon electrode (GCE) and constructing the non-enzymatic electrochemical sensor (TOAB / MWCNTs-ZnP-C60 / GCE). The ZnP-C60 is utilized as an electron intermediate, the MWCNTs are taken as an electron transfer promoter, and the TOAB is taken as an electronic wake-up agent of the intermediate ZnP-C60, and the ZnP-C60, the MWCNTs and the TOAB work together to prepare an MWCNTs-ZnP-C60 nano-complex with good electrochemical activity; and the non-enzymatic electrochemical sensor with good electro-catalytic property is constructed in an TOAB membrane and is applied to detection of nitrite.

Disclosed is a microparticle-supported carbon particle which can be used as an alternative to a platinum-supported carbon particle or a metal platinum particle which is currently used as a catalyst for a fuel cell electrode or the like and in which the amount of platinum used is largely reduced compared to that in a conventional platinum-supported carbon particle or the like. Also disclosed is an electrode for a fuel cell, which is manufactured using the microparticle-supported carbon particle. The microparticle-supported carbon particle comprises a carbon particle having an average particle diameter of 20 to 70 nm and a metal oxide microparticle supported on the carbon particle, wherein the metal oxide microparticle has an average crystallite diameter ranging from 1 to 20 nm and contains a noble metal element such as platinum element (the metal oxide microparticle is represented by the general formula: MOx, and the metal element (M) in the metal oxide microparticle is partly substituted by a noble metal element). The microparticle-supported carbon particle can be produced by a method comprising the steps of preparing a solution containing a complex ion of a metal constituting the metal oxide microparticle, dispersing a carbon particle in the solution to cause the adsorption of the complex ion onto the carbon particle, and performing hydrothermal treatment.

A phase change heat storage type solar heater consists of a phase change heat storage heater, a solar heat collector and a bracket for supporting the phase change heat storage heater and the solar heat collector, wherein the phase change heat storage heater comprises a heat-preserving box, a heat-conducting pipe, a heat exchange coiled pipe and a phase change heat storage material. A system for producing biodiesel by utilizing solar energy comprises the phase change heat storage type solar heater, an oil storage container, biodiesel equipment, a circulating pump, a control device and a solar power supply. A method for producing the biodiesel by utilizing the solar energy comprises the step of reacting by using the system for producing the biodiesel by utilizing the solar energy under normal pressure and at the temperature of between 50 and 70 DEG C, wherein methanol is added according to the molar ratio of the methanol to a grease raw material of 6:1; and the adding amount of calcium oxide is 2 to 6 percent of the mass of the grease raw material.

The invention relates to a method for preparing activated carbon through walnut shells and application of activated carbon to degradation of substituted ureas herbicides isoproturon through specific adsorption-catalysis. Firstly, the clean walnut shells are smashed and then placed in an H3PO4 solution to be steeped and dried, and H3PO4 steeped materials are obtained; the H3PO4 steeped materials are subjected to heat-preservation carbonization, then activation is performed, after activation is completed, cooling is performed under N2 protection till room temperature is achieved, and activated materials are obtained; the activated materials are subjected to acid pricking and then are washed in water to be neutral, and the activated carbon is obtained after drying. The preparation method of the activated carbon is simple in process, raw materials are easy to obtain, cost is low, the prepared activated carbon material has a large specific surface area and high adsorption performance, the porous structure is developed, chemical properties are stable, efficient catalytic degradation capacity can be achieved through cooperation with hydrogen peroxide, the activated carbon has efficient catalytic degradation capacity for substituted ureas herbicides isoproturon, the degradation rate is high, and the prepared activated carbon is convenient to recycle, capable of being reused and suitable for industrial application.

The invention discloses a novel ceramic catalytic electrode and a preparation method thereof. The novel ceramic catalytic electrode comprises a catalytic electrode ceramic matrix and precious metals arranged in the catalytic electrode ceramic matrix and on the surface of the catalytic electrode ceramic matrix, the catalytic electrode ceramic matrix is porous ceramic with tiny three-dimensional pore channels in the interior and on the surface, and the precious metals are distributed in the porous ceramic in a three-dimensional net shape. One purpose of the invention is to provide a novel ceramic catalytic electrode with low cost and high performance. The number of three-phase interfaces among precious metal, porous solid electrolyte ceramic and oxygen is greatly increased due to the structure, so that the novel ceramic catalytic electrode also has excellent catalytic capability under the condition of using a small amount of precious metal, and the production cost is greatly reduced. Another purpose of the invention is to provide a preparation method of the novel ceramic catalytic electrode, and the ceramic electrode prepared by the method is simple in process operation, good in combinability of the electrode material and the ceramic substrate, and less in precious metal consumption.

The invention discloses a novel tubular sensing element and a preparation method thereof. The novel tubular sensing element comprises a tubular ceramic substrate, an outer electrode arranged on the outer surface of the ceramic substrate and an inner electrode arranged on the wall of an inner cavity. One purpose of the invention is to provide a novel tubular sensing element with low cost and high performance, and the external catalytic electrode part of the sensing element is composed of a novel ceramic catalytic electrode, so that the sensing element provided by the invention also has the characteristics of low cost and excellent catalytic performance. Another purpose of the invention is to provide a preparation method of the novel tubular sensing element. The sensing element prepared by the method is simple in process operation, good in combinability of an electrode material and a ceramic matrix, low in noble metal consumption and good in catalytic activity. The invention is especially suitable for the technical field of oxygen sensors.

The invention discloses a nutritive compound protein powder and a preparation method thereof. Using soybean protein isolate, concentrated whey protein and phospholipids as main raw materials, stevia is processed into stevia extract at low temperature, which can retain the stevia extract to the greatest extent. Active ingredients and bioactive ingredients, high extraction rate, pure flavor, natural color, no licorice flavor, scientifically compounded with main ingredients, and added antifreeze polypeptide, dietary fiber powder, bee chrysalis enzymatic hydrolyzate, wheat germ powder, prepared A compound protein powder with suitable taste, good solubility, comprehensive nutrition, strong biological activity and suitable for a wide range of people. The preparation method adopts non-thermal processing technology, which has high work efficiency, low energy consumption, environmental friendliness, no pollution, reduces the introduction of food additives and chemical additives, effectively improves food safety, improves product quality and reduces production costs , achieved the goal of low-carbon production, and can be scaled and industrialized.

The invention discloses a multi-element transition metal phosphide catalyst and a preparation method and application thereof. According to the method, transition metal cobalt, iron and nickel are prepared into a corresponding phosphide (Co2P-FeP-Ni2P). In a persulfate system, the non-steroidal anti-inflammatory drugs in the wastewater are deeply degraded through the synergistic effect of the cobalt-iron-nickel multi-element metal phosphide, and the catalyst has the advantages of high purity, uniform particle morphology, complete crystal structure and good dispersity. Meanwhile, the catalyst has good catalytic capability on pollutants and is low in preparation cost. The cobalt-iron-nickel multi-element metal phosphide prepared by the method can activate peroxymonosulfate in a potassium hydrogen persulfate system to generate sulfate free radicals (SO4 <->.) with strong oxidizing property, so that low-concentration non-steroidal anti-inflammatory drugs are effectively degraded.

The invention discloses a bee pupa worm health care wine, queen bee embryo or drone pupa is taken as an only raw material, low temperature processing technologies such as refrigeration, vacuum degassing, compound enzyme biological enzymolysis, vacuum centrifugation, bio-demulsification, ultrasonic treatment and high voltage pulse electric field treatment are adopted in the whole process, the utilization rate of the queen bee embryo or drone pupa is effectively improved, and loss of nutrition and health care substances is reduced. Ultrasonic waves and peracetic acid are organically combined to accelerate aging of base wine, the base wine is scientifically compounded with queen bee embryo or drone pupa hydrolysate, high voltage pulse aging accelerating is used again, oxidation of peracetic acid to bioactive components of the queen bee embryo hydrolysate is prevented, the aging effect of the queen bee embryo wine is improved, and the taste, the stability and the clarity of the queen bee embryo or drone pupa wine are improved. Finally the queen bee embryo or drone pupa health care wine which is free of worm fishy smell, high in stability, coordinated in taste, mellow and thick, soft, lasting, appropriate is flavor, high in appropriate and nutritive value, good in health care efficacy, clear and transparent is prepared.

The invention discloses a composite protein powder and a preparation method thereof. Using soybean protein isolate, whey protein concentrate and phospholipid as main raw materials, stevia is processed into stevia extract at low temperature, and the effective components of stevia can be retained to the maximum extent. and bioactive ingredients, high extraction rate, pure flavor, natural color, no licorice flavor, scientifically compound with main ingredients, and add antifreeze polypeptide, dietary fiber powder, bee pupa enzymolysate, wheat germ powder to prepare a It is a compound protein powder with suitable taste, good solubility, comprehensive nutrition, strong biological activity and suitable for a wide range of people. The preparation method adopts non-thermal processing technology, high working efficiency, low energy consumption, environment-friendly, non-polluting, reduces the introduction of food additives and chemical auxiliaries, effectively improves food safety, improves product quality and reduces production costs , to achieve the goal of low-carbon production, can be scaled, industrialized development.