174results about How to "Catalytically active" patented technology

The invention discloses a start-up method for an ex-situ prevulcanization secondary activity center hydrogenation catalyst. After resistance to air loss of a device is qualified, circulating hydrogen compressor working load is adjusted to 0-20% of a maximum load, the catalyst reacts at a low temperature to release heat; when the bed layer temperature rise to 60-150 DEG C, start-up activation oil is introduced, the circulating hydrogen compressor working load is adjusted to 60-100% of the maximum load for wetting of the catalyst; the start-up activation oil is cycled in a reaction system closed path, the catalyst bed temperature is risen to 180 to 230 DEG C by heat exchange; a proper amount of olefin-enriched naphtha is added into the start-up activation oil, the catalyst bed temperature is risen to 300-380 DEG C to complete start-up activation. The start-up method, in the premise of no influence on the use properties of the secondary activity center hydrogenation catalyst, can better use the catalyst characteristics, reduce the device energy consumption, and reduce the device investment cost, and the start-up process can be simplified.

The invention discloses a macromolecular composite membrane material with photocatalysis activity and a preparation method thereof.The preparation method includes: (1), mixing oxidized graphene, deionized water and anhydrous alcohol, dropwise adding titanic acid after ultrasonic dispersion, heating for reaction, cooling reaction liquid, and filtering and washing to obtain a suspension system containing a TiO2-oxidized graphene nano material; (2), transferring the suspension system into a high-pressure kettle, adding a reductant, performing thermal treatment after sealing, cooling before separating, and washing and drying to obtain a TiO2-oxidized graphene nano powder material; (3), suspending the TiO2-oxidized graphene nano powder material in methyl methacrylate, adding initiator after ultrasonic dispersion, stirring in water bath for reaction to obtain membrane casting liquid, uniformly knife-coating the membrane casting liquid on a substrate, and drying to obtain the macromolecular composite membrane material.The preparation method is simple in synthesis process, obtained inorganic nano TiO2 particles are closely combined with graphene, and a graphene-TiO2 composite material is uniformly dispersed in a polymethacrylate macromolecular membrane.

The invention relates to a nitrogen-doped porous carbon material used for anode of a lithium-air cell, which has a mutually communicated graded pore structure, N is uniformly doped in a C frame, wherein N accounts for 0.2-15% of carbon material, the graded pore comprises a mass transfer pore and a deposition pore, the pore volume of the deposition pore accounts for 40-95% of total pore volume, and the pore volume of the mass transfer pore accounts for 4-55% of total pore volume. The carbon material as the lithium-air cell material can greatly increase the space utilization rate of the carbon material during a charge and discharge process at maximum limit, so that lithium-air cell energy density and power density can be effectively increased. The nitrogen-doped porous carbon material used for anode of lithium-air cell has the advantages that the preparation technology is simple, the material source is wide, the pore structure of the graded aperture carbon material enables regulation and control, and the regulation and control modes are various, and the nitrogen doping mode is easy to realize.

The present invention relates to a nitrogen-doped porous carbon material for a lithium-air battery positive electrode. The nitrogen-doped porous carbon material is characterized in that the nitrogen-doped porous carbon material has an interconnected graded pore structure, N is uniformly doped in the C skeleton, N accounts for 0.2-15% of the carbon material atomic ratio, the graded pores comprise mass transfer pores and deposition holes, the deposition holes account for 40-95% of the total pore volume, and the mass transfer pores account for 4-55% of the total pore volume. According to the present invention, with application of the carbon material as the lithium-air battery electrode material, the space utilization rate of the carbon material during the charge-discharge process can be increased at a maximum, and the energy density and the power density of the lithium-air battery can be effectively increased; and the preparation process is simple, the material source is wide, the pore structure of the graded pore carbon material can be regulated, the regulation manner is diverse, and the nitrogen doping manner is easily achieved.

The invention provides a preparation method of a long-life DSA (Dimension Stable Anode) electrode. The preparation method comprises the steps of: by taking metallic titanium or titanium alloy as a matrix, carrying out certain surface treatment on the matrix; by taking the matrix as the negative pole, carrying out constant-current electroplating for a certain time in a solution containing Sn<4+> and Sb<3+> to obtain a compact electroplating intermediate layer; and finally uniformly coating an active layer on the surface of the intermediate layer. The preparation method provided by the invention is simple in process and convenient for operation and has the advantages that the large-scale production can be easily realized; the prepared DSA electrode is capable of effectively preventing dissolved oxygen from spreading into the matrix and passivating the matrix; and the service life of the electrode is greatly prolonged.

The invention discloses a preparation method for a nitrogen-doped carbon nanotube array/carbon fiber material air electrode. According to the method, a conductive carbon layer which is coated on one side surface of a carbon fiber material and contains thermocatalytic vapor deposition catalyst precursor is taken as a substrate, and the nitrogen-doped carbon nanotube array with high distribution density is deposited on the substrate, thereby forming a three-dimensional porous air electrode which has catalytic activity for two pieces of reaction: oxygen electro-reduction and oxygen negative ion electro-oxidization. The air electrode prepared by the method has a structure approximate to a linear pore, relatively high specific surface area, relatively high oxygen electro-reduction and oxygen negative ion electro-oxidization catalytic activity and excellent electronic conductivity and mechanical strength, is an ideal air electrode material for preparing a high-capacity new-type metal air battery and is a catalytic active matter carrier material for preparing a fuel battery cathode and anode.

The invention discloses a long-chain alkyl imidazole phosphate ionic liquid, i.e. 1-tetradecyl-3-(2-ethylhexyl)-imidazole diisooctyl phosphate. The invention also discloses a preparation method and application of the ionic liquid. The ionic liquid involved in the invention has certain catalytic activity, and is also soluble in the reaction product trimethylolpropane oleate, so that catalyst separation is omitted after esterification reaction, and the industrial production cost is greatly reduced. More importantly, the ionic liquid soluble in trimethylolpropane trioleate has excellent friction reduction and antiwear effects, and can significantly improve the tribological properties of base oil.

The invention relates to a series of human-derived urate oxidases with catalytic activity, DNA sequences encoding them, expression vectors containing the DNA sequences, as well as host cells containing the expression vectors. The human-derived urate oxidases have recombinant amino acid residue sequences obtained by specific locus amino acid residue replacement or exon locus amino acid residue replacement on the basis of SEQ ID NO:17. According to the invention, human urate oxidase pseudogene is successfully revived, and human-derived urate oxidases with catalytic activity can be expressed. Thus, the human-derived urate oxidases with catalytic activity have good prospects in preparation of low immunogenicity and even low immunogenicity uric acid lowering drugs.

The invention relates to a preparation method of a MnOx-CeO2 composite semiconductor catalyst which has the function of low-temperature photo-thermal concerted catalytic purification of VOCs and the light-assisted self repairing function. The chemical formula of the MnOx-CeO2 composite semiconductor catalyst is Ce<1-a>MnaO<2-Delta>, wherein a is larger than 0 and smaller than 0.7; the method comprises the following steps: (1) weighing Ce salt and KMnO4, and dissolving in an alkaline solution to obtain a mixed suspension solution; (2) sealing the mixed suspension solution to have a hydrothermal reaction to obtain a precipitate; (3) separating the prepared precipitate, washing, drying and then grinding to obtain the MnOx-CeO2 composite semiconductor catalyst.

The invention relates to a preparation method of a microcapsule fire retardant, and belongs to the technical field of fire retardant. According to the preparation method, magnesium hydroxide, ammoniumpolyphosphate, and melamine phosphate are mixed for coating of zeolite molecular sieve, wherein melamine phosphate is capable of achieving flame resistance at a condensed phase and a gas phase, a large amount of latent heat is absorbed through sublimation, volatilization, and evaporation, inert gas is generated, and gas state substances such as MA steam, water vapor, N2, CO2, and NH4 are generated, the concentrations of oxygen and combustible gas at a combustion zone are reduced through dilution, and at the same time, coating of material surface is realized; charing is promoted, formation ofmolten drops from some polymers is promoted, so that a part heat energy is taken away, and combustion reaction is terminated; the zeolite molecular sieve is a crystal aluminosilicate formed by SiO4 and Al2O3 tetrahedrons through oxygen bridges; not only uniform pore structures, and large specific surface area, but also extremely high surface polarity is achieved. The zeolite molecular sieve possesses excellent absorption effect and certain catalyst effect, and flame resistance of the microcapsule fire retardant is improved.

The invention relates to a method for preparing reduced graphene oxide load ReS2 for a cathode material of a lithium sulfur battery. The method comprises steps that 1), graphene oxide dispersion is prepared through utilizing single-layer graphene oxide powder; preparation of reduced graphene oxide-loaded ReS2 nanosheet, according to the mass ratio of ammonium perrhenate and thiourea and the single-layer graphene oxide powder (0.3-0.7) ): (0.8-1.2): 1, the ammonium perrhenate and thiourea are weighed and added to the graphene oxide dispersion to obtain uniform mixture solution, the mixture solution is transferred to a reaction vessel and then heated to 150-240 DEG C for 10-24 hours, and a reaction product is obtained; the reduced graphene oxide load ReS 2 nanosheet is calcined to improve the crystallinity of the material, and the final product rGO/ReS2 is obtained.

The invention relates to a method for measuring hydrogen pressure in solid steel and a device; the device is composed of a ceramic solid electrolyte pipe, an alundum tube, an air inlet pipe, an electrode lead wire, an air exhaust pipe and a high-resistance digital voltmeter; a sample to be measured is contacted with the close end of the ceramic solid electrolyte pipe, one end of the electrode leadwire is contacted with the sample to be measured, the other end thereof is stretched in the air inlet pipe and is contacted with the inner wall of the ceramic solid electrolyte pipe, the temperatureof the sample to be measured can be controlled at 0-50 DEG C or 200-800 DEG C, standard hydrogen passes through the air inlet pipe, the measuring time is controlled for 5-30 minutes, electrodynamic force value is read by the high-resistance digital voltmeter, and then the pressure of the hydrogen to be measured is calculated. The method realizes to measure hydrogen pressure in solid steel at a range of from 0 to 50 DEG C or from 200 to 800 DEG C in an on-line way, so as to find defect sites of solid steel and aluminium alloy in a real-time manner and carry out dehydrogenation in advance.

The invention which relates to the field of denitration in a coal fired power plant discloses a method for preparing a Y zeolite catalyst used for denitration of the coal fired power plant from coal ash. The method comprises the following steps: calcining a solid waste coal ash of the coal fired power plant in a muffle furnace, and fusing with sodium hydroxide at a high temperature; and stirring with heating in a water bath, carrying out hydrothermal crystallization on the obtained mixed solution, washing with water to neutrality, drying, and roasting to obtain zeolite raw powder. The zeolite catalyst with a certain catalytic activity is obtained through combining the special tunnel structure of the zeolite material and carrying out ion loading, and is applied to the denitration of the coal fired power plant. The method allows the catalyst for the denitration of the power plant to be obtained through using the waste coal ash as a raw material, and synthesizing and modifying the zeolite, so the utilization prospect of the coal ash is broadened, and the resource utilization of the coal ash is realized, thereby the method is a new green production method which can satisfy sustainable development requirements.

The invention provides a preparing method and application of mimic enzyme with double catalysis functions based on a hemin mediation gold mineralization path. The one-pot type in-situ synthesis method is adopted, the hemin and chloroauric acid are mixed under the alkaline condition, then gold in-situ biological mineralization is achieved with the hemin as a reducing agent and a stabilizing agent, and a Hemin-AuNCs compound with Hemin peroxidase catalysis and gold catalysis activity is prepared. The function of a nano wire of the Hemin-AuNCs compound is brought into play, the electronic transmission capability of the Hemin catalysis reaction is promoted, meanwhile, the adsorption capability for a substrate is enhanced, and the catalysis activity of the Hemin-AuNCs compound is obviously higher than that of common Hemin by four or more times. Complex photoelectric instrument usage is not involved in the preparing method, and the beneficial effects that the catalysis activity is high, operation is simple, response is fast and cost is low are achieved. The cancer biomarker alpha fetoprotein immunoassay serves as the example, the Hemin-AuNCs compound is applied to marking of an AFP antibody, then, the enzyme linked immunosorbent assay is adopted, and high-sensitivity detection on the cancer biomarker alpha fetoprotein in blood is achieved through the enzymatic catalysis and gold catalysis silver deposition signal amplification path.

The invention relates to a preparation method of a titanium anode for water treatment. The preparation method specifically comprises the following steps: carrying out pretreatment on a titanium substrate; preparing an active coating solution; and performing sintering. WO3 which is good in chemical stability, has catalytic activity and is low in cost is introduced into a traditional ruthenium-titanium active component, the service life of the anode is effectively prolonged, and the manufacturing cost of the anode is reduced.

The invention discloses a preparation method of foaming stainless steel plate, and a preparation method of a heat-engine plant denitration catalyst, and belongs to the technical field of denitration catalyst. The preparation method of the denitration catalyst is capable of solving problems of existing denitration catalysts that carrier open pore area is small, and ash clogging resistance is poor. The preparation method of the foaming stainless steel plate comprises following steps: a hydride foaming agent and polyvinyl alcohol are added into aluminum alloy melt for uniform stirring; an obtained mixture is delivered into a mould, and is subjected to foaming treatment so as to obtain the foaming stainless steel plate. The foaming stainless steel plate is large in open pore area, and excellent in ash clogging resistance. The foaming stainless steel plate is taken as the carrier of the denitration catalyst, and the preparation method of the denitration catalyst comprises following steps: step 1, titanium gel is prepared; step 2, humic acid is added into the titanium gel for staling; step 3, the surface of the foaming stainless steel plate is coated with the titanium gel via spraying, and is dried and roasted; and step 4, the heat-engine plant denitration catalyst monomer is obtained via plate folding, brazing, and packaging. The denitration catalyst is wide in use temperature range, and low in use cost.

The invention discloses a method for preparing a Ru-based/Pt skin film nano-film electrode for a fuel cell. The method comprises the following steps of: chemically plating gold on a reflecting bottom surface of a semi-circle silicon column; electroplating a Ru film with the thickness of 5 to 6nm on a gold substrate by using a two-step wet method; then covering a Pt layer on the Ru film nano-electrode by an under potential deposition Cu spontaneous substitution method; and repeating the deposition/substitution for 1 to 4 times to obtain the Ru-based/Pt skin film nano-film electrode for the fuel cell. The Ru-based/Pt skin film nano-film electrode prepared by the method of the invention has the characteristics of ultrathin Pt content and controllable Pt carrying capacity; and in addition, the Ru-based/Pt skin film nano-film electrode prepared by the spontaneous substitution method has catalytic activity, can be applied to field ATB-SEIRAS research, obtains an obvious specific surface infrared spectrum signal for adsorption species and displays the synergistic effect of the Pt-Ru catalyst.

The invention relates to the technical field of photocatalytic materials, in particular to a preparation method and application of a perylene bisimide based organometallic polymer with visible-light photocatalytic performance.The preparation method includes the steps: 1, adding transition metal salt Tm and perylene bisimide derivative H2PDI in the molar ratio of 1:1.0-1.5 into a mixed solvent of N,N-dimethylformamide and water in the volume ratio of 1:2-2.5, and regulating the solution to alkalescence with NaOH; 2, putting the reaction solution prepared in the step 1 in an oven with the temperature controlled between 90 DEG C and 110 DEG C and time controlled between 60h and 80h, closing the oven, cooling to room temperature, crystallizing out, filtering and drying to obtain the target material Zn-PDI.The catalyst is simple to synthesize and easy to operate, the catalyst and the raw materials for catalytic reaction are low in cost, yield is high, visible-light photocatalysis can be realized under mild conditions, and convenience is brought to widespread popularization and application.

The invention discloses a Co oxide/BaCO3 catalyst for N2O catalytic decomposition and a preparation method thereof. The catalyst uses BaCO3 or a mixture of the BaCO3 as a carrier; the Co oxide mainly exists on the surface of the BaCO3 carrier to form a Co oxide enrichment shell layer; the Ba/Co atomic ratio in the catalyst is greater than 0.5. The catalyst obtained by a preparation technology has the characteristics that (1) the specific surface of the catalyst is obviously higher than that of the BaCO3 carrier per se; (2) the high activity of the Co oxide on the N2O catalytic decomposition can be fully utilized, so that the cost of the catalyst is reduced; (3) the catalytic activity of the N2O decomposition is obviously higher than that of a catalyst, with identical composition, obtained by an impregnation method and a coprecipitation method.

The invention provides a preparation method of an intermetallic compound nano-catalyst, which comprises the following steps: S1) mixing carbon black, an iridium salt and a gallium salt in a solvent, and removing the solvent to obtain a mixture; and S2) carrying out high-temperature treatment on the mixture in a reducing atmosphere to obtain the intermetallic compound nano-catalyst. Compared with the prior art, the IrGa nano-particles in the intermetallic compound nano-catalyst prepared by the preparation method disclosed by the invention have catalytic activity; meanwhile, mesopores in a carbon carrier can improve the material transmission rate in a catalytic reaction, so that the carbon carrier has better activity and stability as a catalyst, and has better catalytic activity and application prospect in an acidic oxygen evolution reaction.

The invention discloses a preparation method for manganese dioxide composite catalyst and a synthetic method for 2-pyridylaldehyde, and belongs to the field of organic synthesis. The preparation method comprises the following steps: firstly, loading potassium permanganate to acid-modified attapulgite to obtain MnO4<->-attapulgite; secondly, loading Fe3O4 to the MnO4<->-attapulgite by a coprecipitation method, and roasting to obtain the MnO2 composite catalyst with high catalytic activity. According to the preparation method, the catalytic advantages of MnO2 are successfully combined with the quick separation advantages of the attapulgite-Fe3O4 magnetic material, so that MnO2 in the catalyst can be recycled; when the MnO2 composite catalyst is used for preparing 2-pyridylaldehyde, the reaction yield is high, the conditions are mild, and the catalyst can be separated from reaction liquid through a magnetic sedimentation method and recycled after the reaction is finished. The preparation method has the advantages of little environmental pollution, low reaction cost and the like, and is suitable for industrialized application.

The invention discloses a composite electrode and a preparation method and application thereof, and belongs to the technical field of electrochemical biosensors. A composite electrode includes: a conductive substrate; a polyaniline/graphene composite layer; a polyaniline/graphene composite layer which coats the surface of the conductive substrate; and gold-platinum bimetallic nanoparticles, wherein gold-platinum bimetallic nanoparticles are deposited on the surface of the polyaniline/graphene composite layer. According to the composite electrode provided by the invention, through the synergistic effect of all the parts, the stability of the composite electrode and the detection sensitivity to hormones are improved, and dopamine, 5-hydroxytryptamine and melatonin can be detected at the same time.

The invention relates to the technical field of sanitary protective equipment, in particular to a photocatalyst disinfection mask and a preparation method thereof. The photocatalyst disinfection maskincludes a functional layer which includes base materials, function materials are sprayed on the base materials, and the function materials include modified photocatalyst materials and an emulsifyingagent; the preparation method includes the steps that the function materials are mixed to produce suspending liquid and colloidal liquid in sequence; the colloidal liquid is sprayed on the base materials to produce the function materials; and the photocatalyst disinfection mask can be effectively sterilized during insufficient light, and has the characteristics of simple structure, lightness, portability, low production cost and suitable promotion.