26results about How to "More exposure" patented technology

The invention relates to a defect-rich cobalt-doped MoS2 / NiSe2 heterojunction nano array electrode as well as a preparation method and application thereof, and belongs to the field of electro-catalysis and new energy materials. The electrode is composed of a self-supporting MoS2 / NiSe2 heterojunction nano array, cobalt atom doping and abundant structure defects are introduced at the same time, and the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) or urea oxidation reaction (UOR) activity of an electrode material in alkaline electrolyte is remarkably improved. The prepared electrode material has the advantages of low cost, high activity, good stability and the like, and has wide application prospects in the fields of water electrolysis, metal-air batteries, domestic sewage treatment and the like.

The invention aims at disclosing a magnesium hydride continuous production device and process, and relates to the technical field of magnesium hydride preparation, the magnesium hydride continuous production device comprises a sealing shell, a heating inner container, a power assembly, a feeding assembly, a discharging assembly, an inert gas replacement assembly and a hydrogenation inlet; the heating inner container comprises a side wall, a feeding end and a discharging end, a plurality of gas one-way valves are arranged on the side wall, a spiral propeller, a plurality of steel balls and / or a plurality of steel bars are arranged in the heating inner container, and a filter screen is arranged at the discharging end; a conical part and a recycled material port are arranged at the bottom of the sealed shell; the feeding assembly comprises a feeding lock hopper and a feeding pipe, and the feeding pipe communicates with the feeding end. The discharging assembly comprises a discharging pipe and a discharging lock hopper, and the discharging pipe is communicated with the discharging end; the method has the technical effects that the particle size of the magnesium powder is 10-300 microns, the particle size of the produced magnesium hydride is 50-800 nm, continuous feeding, continuous reaction and continuous discharging can be realized, large-scale production of the magnesium hydride is realized, and the hydrogen storage density of the magnesium hydride is not less than 7 wt%.

The invention relates to the technical field of fuel cells, in particular to a carbon fiber base material for a fuel cell, a preparation method of the carbon fiber base material, raw carbon paper and a preparation method of the raw carbon paper. The preparation method of the carbon fiber base material comprises the following steps: S1, adopting MFC or a mixture of MFC and pre-oxidized fiber pulp as reinforcing fibers, mixing the reinforcing fibers with water, and pulping to obtain premixed slurry; s2, uniformly mixing carbon fibers, the premixed slurry and a dispersing agent to obtain mixed slurry, molding the mixed slurry by adopting a wet molding process, and drying to obtain the carbon fiber base material. The MFC or the mixture of the MFC and the pre-oxidized fiber pulp is used as the reinforcing fiber, and the reinforcing fiber is pulped and then mixed with the carbon fiber and the dispersing agent to prepare the carbon fiber base material, so that the dispersity of the carbon fiber and the mechanical strength and conductivity of the carbon fiber base material in the wet forming process can be improved; and the negative influence on the subsequent preparation of the raw carbon paper is avoided.

The invention provides a preparation method and application of a cobalt-aluminum hydrotalcite loaded noble metal catalyst rich in metal defects. The preparation method comprises the following steps: dissolving a cobalt source, an aluminum source, urea and ammonium fluoride in an aqueous solution, and carrying out hydrothermal reaction to obtain a cobalt-aluminum hydrotalcite precursor; the preparation method comprises the following steps: preparing a precursor, treating the precursor with an alkaline solution to obtain a defect-rich cobalt-aluminum hydrotalcite carrier, and dipping the defect-rich cobalt-aluminum hydrotalcite carrier in a noble metal solution to obtain the defect-rich cobalt-aluminum hydrotalcite supported noble metal catalyst. The preparation method is simple and high in operability, the noble metal can be anchored on the defect-rich cobalt-aluminum hydrotalcite carrier, and the defect-rich cobalt-aluminum hydrotalcite loaded noble metal catalyst can be used as a bifunctional catalyst through the synergistic effect of the noble metal and the cobalt-aluminum hydrotalcite carrier, has excellent electro-catalytic performance, and can be used for preparing a catalyst for preparing the cobalt-aluminum hydrotalcite loaded noble metal catalyst with the defect-rich cobalt-aluminum hydrotalcite loaded noble metal catalyst with the defect-rich cobalt-aluminum hydrotalcite loaded noble metal catalyst. And the electrolytic tank assembly process is simplified, and the production cost is reduced.

The invention provides a ruthenium-containing catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts. According to the invention, 3, 3 '-dibromo-4, 4'-biphenol, 1, 3, 5-tri (p-vinylphenyl) benzene and ruthenium salt are used as main raw materials to carry out polymerization reaction so as to prepare a ruthenium-containing catalyst in which nano-scale pore channels are formed; the obtained ruthenium-containing catalyst is good in catalytic performance, thermal stability and chemical stability; the ruthenium-containing catalyst is used for catalyzing hydrogenation of diisononyl phthalate to prepare the cyclohexane-1, 2-diisononyl phthalate, the catalytic effect of the ruthenium-containing catalyst is good, and the yield of the cyclohexane-1, 2-diisononyl phthalate is high.

The invention belongs to the field of application of electro-catalytic materials, and particularly relates to a multi-element metal oxide integrated electrode and a preparation method thereof. The electrode is prepared by a one-step Joule thermal method and comprises the following steps: step 1, pretreating the surface of a carbon-based substrate by using a polyethyleneimine aqueous solution and drying; 2, dissolving the transition metal salt and precious metal salt hydrate in ethanol to obtain a precursor solution; 3, uniformly dripping the precursor solution on the surface of a carbon-based substrate for dipping, and carrying out vacuum drying; and 4, rapidly heating the carbon-based substrate by using electric Joule thermal equipment to prepare the catalytic electrode. The method is simple, the multi-metal oxide integrated electrode which is high in activity, low in cost and uniform in dispersion is rapidly synthesized in a short time, and the catalyst can effectively support efficient oxygen evolution reaction under acidic and alkaline conditions; the preparation method is suitable for large-scale industrial production of the electrolyzed water OER catalytic electrode, and can be widely applied to the application fields of electrolytic cells and fuel cells.

The invention relates to the technical field of cement preparation, and discloses a multi-component cement preparation method, which comprises the following steps: selecting 60% + / -5% of limestone, 15% + / -5% of clay and 15% + / -5% of sandstone as main raw materials according to a corresponding ratio, conveying the cement raw materials into a pulverizer through a belt conveyor, and pulverizing to obtain the multi-component cement. According to the preparation method of the multi-component cement, a driving motor is started, the driving motor drives a bevel gear disc to drive a first fan blade and a bevel gear ring to rotate synchronously, the first fan blade performs dust removal operation in the rotating process, the bevel gear ring drives a rotating rod to rotate synchronously, and the first fan blade and the bevel gear ring rotate synchronously. And the rotating rod drives the stirring rod to pre-crush and mix the cement raw materials at the top of the long-range conveying belt, so that the pressure of conveying the cement raw materials at the top of the long-range conveying belt is more uniform, and the workload of grinding the raw materials in the subsequent preparation process is also reduced.

The invention relates to a high-performance graphite-phase carbon nitride photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: taking a nitrogen-rich compound as a precursor, directly preparing the graphite-phase carbon nitride material through pyrolytic polycondensation under the water-assisted condition, the pyrolysis temperature is 450-600 DEG C, and the heat preservation time is 2-12 hours. The preparation process is carried out in air, the normal pressure is kept, water mist is introduced into the furnace through an atomization device, and the introduction rate of the water mist is 5-20 mL / h. The prepared graphite-phase carbon nitride material has a nano-porous layered structure, has a large specific surface area, has good dispersibility in water, and has high performance of photocatalytic decomposition of water for hydrogen production and degradation of organic pollutants. The preparation method provided by the invention is simple in process and easy to operate, does not need to introduce any external gas, and has a wide application prospect.

This invention discloses a CuBDC nanosheet, its preparation method, and its applications. The CuBDC nanosheet is a single-layer two-dimensional CuBDC nanosheet material; the aspect ratio of the CuBDC nanosheet is 80–400. The CuBDC nanosheet is single-layered, possessing a high aspect ratio and a large specific surface area. The preparation method is simple, the material is inexpensive and readily available, resulting in low cost and ease of mass production. The CuBDC nanosheet is suitable for gas storage, adsorption separation, heterogeneous catalysis, electrochemistry, and analytical applications.

The invention provides a melamine-mediated POMOF-derived molybdenum carbide-loaded copper nanoparticle catalyst as well as a preparation method and application thereof, and belongs to the field of photoelectrocatalysis environmental pollution treatment and new energy (hydrogen production) synergism. The preparation method of the catalyst comprises the following steps: sequentially mixing, stirring, standing, centrifuging, washing, drying and dehydrating a trimesic acid methanol solution, a methanol mixed solution of copper acetate monohydrate and phosphomolybdic acid hydrate and melamine to obtain a POMOF / melamine catalyst precursor; the POMOF / melamine catalyst precursor is subjected to pyrolysis, and a melamine mediated POMOF derived molybdenum carbide loaded copper nanoparticle catalyst is obtained; the preparation method is simple, raw materials are easy to obtain, the antibiotic removal efficiency is high, the H2 yield is excellent, the alkaline pH application range is wide, the electrode stability is high, the electrode is not prone to being influenced by water quality characteristics, the preparation method is suitable for treatment of degradation-resistant organic pollutants under the complex water quality condition, and the preparation method is simple, convenient and suitable for industrial production.

The invention relates to an electrolyte for activating an oxygen evolution catalyst, an activation method, an activated oxygen evolution catalyst and application of the activated oxygen evolution catalyst. The electrolyte for activating the oxygen evolution catalyst comprises an alkaline solvent and an additive, the additive includes a mixture of potassium and sodium salts containing the same anion. According to the invention, the transition metal-based oxygen evolution catalyst is activated in the activation electrode solution of the mixture of sylvite and sodium salt containing the same anion, and the structure of the activated oxygen evolution catalyst activated by the activation electrode solution is reconstructed, so that more active sites can be exposed, and an optimized electronic structure in a favorable form is formed; furthermore, the activity of the oxygen evolution catalyst is enhanced, the overpotential of the transition metal-based oxygen evolution catalyst is reduced, the catalytic efficiency is improved, and excellent catalytic performance is realized.

The invention discloses a CuFeS2 and FeS2 composite Fenton-like catalyst as well as a preparation method and application of the CuFeS2 and FeS2 composite Fenton-like catalyst. According to the preparation method disclosed by the invention, the natural pyrite does not need a further forming process and has good adsorbability on copper ions, and a Cu element is embedded into a pyrite crystal lattice through a citrate dipping-anaerobic calcining process, so that the CuFeS2-FeS2 composite Fenton-like catalyst with a heterostructure is formed. The catalyst disclosed by the invention can activate peroxymonosulfate and hydrogen peroxide to generate active oxygen species, so that different types of organic pollutants such as sodium dodecyl benzene sulfonate, tetracycline hydrochloride, rhodamine B and the like which are common in water, such as surfactants, antibiotics, dyes and the like can be quickly degraded and mineralized. The granular catalyst with good catalytic performance is prepared from the pyrite with huge reserves in nature as a raw material through a simple dipping-calcining process, and the method has the advantages of high feasibility, low cost, easiness in industrial preparation and the like.

The present invention relates to a cobalt oxide carbon nitride composite material containing cation vacancies and a preparation method and application thereof. The present invention selects an ultrathin carbon nitride nanosheet with a large specific surface area as a carrier, and uses glycerol cobalt with Co-O-Co-O as a periodic skeleton unit as a precursor, combines it with the carbon nitride nanosheet, and then undergoes thermal oxidation treatment to form a Co with cobalt cation vacancies. 3‑x O4 / CN composite catalyst. During the preparation process, the strong metal-support interaction can induce the formation of abundant cobalt ion vacancies and inhibit the agglomeration of oxide nanoparticles, thus achieving Co 3‑x High dispersion of O4. 3‑x The O4 / CN composite catalyst exhibits good PMS activation and utilization efficiency and p-nitrophenol degradation performance. The degradation process does not require light addition. At the same time, the catalyst exhibits good universality and anti-interference for different pollutants and different water environments, and has good reusability. It can be used for PMS activation and degradation of organic pollutants.

The application discloses a vanadium pentoxide-based magnesium battery positive electrode material and a preparation method thereof. The application obtains flower-spherical vanadium pentoxide through a hydrothermal reaction of an ammonium metavanadate and a mixed solution of reactants and subsequent calcination; the method has high production efficiency, is convenient to produce, has short preparation time, is low in cost and has good repeatability. The flower-spherical vanadium pentoxide nanomaterial is used as a magnesium battery positive electrode material, more surface active sites can be exposed, ion transmission channels are increased, the problem of stacking and agglomeration of vanadium pentoxide nanosheets in a cycle process is solved, the exposed (001) crystal face reduces the interface side reaction of an electrode and an electrolyte surface, the storage capacity of vanadium pentoxide is greatly improved, the vanadium pentoxide has good cycle stability and is an excellent magnesium battery positive electrode material.

The invention discloses a koelreuteria paniculata leaf-shaped nickel selenide / vanadium selenide self-supporting composite electrode and a preparation method and application thereof.The preparation method comprises the steps that selenium powder serves as a selenium source, lauryl sodium sulfate and polyvinylpyrrolidone serve as morphology regulating agents, and a vanadium source and an alkali source are mixed to be uniform; a nickel-vanadium-based hydroxide precursor is synthesized on foamed nickel in situ by adopting a hydrothermal reaction method, then selenium powder is added into the precursor, and the integrated Ni3Se2 / V5Se8 / NF self-supporting composite electrode is prepared by adopting a pyrolysis method. On one hand, the oxidation-reduction process in the electrochemical reaction process is accelerated, and the adsorption energy barrier of a reaction intermediate is reduced, so that the catalytic performance of the material is improved; on the other hand, electron transfer in the electro-catalytic reaction process is improved, the catalytic activity is promoted to be improved, it is effectively guaranteed that strong interaction can be formed between the active material and the NF substrate, and the NF substrate shows good mechanical stability and deformation resistance in electrochemical application.

The invention discloses an oxide-type catalyst for preparing aliphatic isocyanate by catalytic pyrolysis. The catalyst uses Zn(NO3)2·6H2O and 2-methylimidazole as raw materials to prepare a ZIF-8 imidazole zeolite framework; and then uses a metal nitrate M(NO3)2 as raw materials to prepare aliphatic isocyanate by an impregnation method. x ·yH2O makes metal ions M x+ Replacement of part of Zn in the ZIF‑8 imidazole zeolite framework 2+ , and obtain an M‑ZIF‑8 precursor; the M‑ZIF‑8 precursor is calcined at 400-600°C for 1-10h in an air atmosphere to obtain MO z / ZnO oxide type nanocatalyst. The catalyst of the present invention inherits the nano morphology and porous structure of the organic metal framework precursor, has a rich oxygen vacancy concentration, is conducive to mass transfer and heat transfer, and increases the utilization rate of active sites. The catalyst of the present invention has high catalytic activity, has a significant promoting effect on the catalytic pyrolysis of ADU to prepare ADI, and has high reaction activity and selectivity.

According to the preparation method, ZIF-67 is taken as a template, nickel nitrate and copper porphyrin are added at the same time, and the metalloporphyrin intercalated double-metal hydroxide material is successfully prepared through acid etching. The material is composed of copper porphyrin Cu-TCPP and hollow NiCo-LDH, and has a hollow porous structure and a large specific surface area. Benefited from the synergistic effect of Cu-TCPP and NiCo-LDH, only 204mv overpotential is needed when the material reaches the current density of 10mA. Cm <-2 >, the material is superior to transition metal-based OER electrocatalysts reported in most literatures, the performance is almost unchanged after a stable test for 12 hours, and the material has a relatively good application prospect.

The application belongs to the field of catalytic materials, and specifically discloses a preparation method of a nano high-entropy alloy material and application of the material in oxygen electrocatalysis. The preparation method is as follows: a multi-metal organic complex, a reactive metal and a molten salt are mixed and calcined, and then subjected to simple water washing treatment and alkali washing modification treatment to obtain the nano high-entropy alloy material; the multi-metal organic complex is a complex formed by a metal M source and an organic complexing agent, and the metal M contains five or more than five kinds of Fe, Co, Ni, Cr, Mn, Cu, V, Mo, Ti, Au, Ag, Pt, Pd, Ru, Ir and Rh. The application also includes the material prepared by the preparation method and application of the material in OER / ORR catalysis. The material prepared by the method has excellent OER / ORR catalytic activity and stability.

The invention relates to an Ag-Pt three-way catalyst with high performance and low cost and a preparation method thereof, and the method comprises the following steps: loading Pt colloid coated with a cerium-zirconium solid solution on an Ag modified molecular sieve, and then spraying on a cordierite carrier to obtain the catalyst. Wherein the cerium-zirconium solid solution coated Pt can effectively avoid sintering agglomeration of noble metal Pt at high temperature, and the high specific surface area of the molecular sieve promotes high dispersion of Ag and exposes more active centers, so that the use amount of the noble metal is reduced, and the performance of the catalyst is improved at the same time; the catalyst prepared by coating the catalyst on the carrier has the excellent characteristics of high performance and low cost, and has a wide market application prospect.

The invention discloses an A-site reconstruction perovskite oxide and a preparation method and application thereof, and relates to the technical field of catalysts, the perovskite oxide is a LaCoO3 / La (OH) 3 compound, and La (OH) 3 nanoparticles are uniformly embedded into the surface of LaCoO3. The A site of the perovskite oxide is reconstructed through alkoxide hydrolysis, and the inactive A site of the perovskite oxide is converted into an active center, so that the catalytic activity is remarkably improved, and a new thought is provided for future material design and heterogeneous AOPs research.

The application discloses a TiO2-ZnIn2S4 core-shell structure S-type heterojunction photocatalyst and a preparation method and application thereof, and relates to the field of photocatalytic materials. The TiO2-ZnIn2S4 core-shell structure S-type heterojunction photocatalyst comprises a TiO2 inner core, and a ZnIn2S4 outer shell coated outside the TiO2 inner core; the ZnIn2S4 outer shell is formed by in-situ growth of ZnIn2S4 nanosheets on the surface of the TiO2 inner core to form a three-dimensional hierarchical nanoflower structure; wherein, an S-type heterojunction is formed between the TiO2 and the ZnIn2S4. The photocatalyst realizes efficient spatial separation of photo-generated carriers through a close heterojunction interface of the core-shell structure, and meanwhile, the S-type heterojunction retains the carriers with strong oxidation-reduction capacity, so that the performance of water decomposition for hydrogen production by photocatalysis and the cycle stability are improved.

The invention relates to multi-drive antibacterial hydrogel and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing functional particles, AM and BIS to obtain a first layer of precursor solution; uniformly mixing NIPAM, polyethylene glycol and BIS to obtain a second layer of precursor solution; adding tetramethylethylenediamine and potassium persulfate into the first-layer precursor solution to obtain a first solution, and reacting the first solution to form a first layer of antibacterial hydrogel; adding tetramethylethylenediamine and potassium persulfate into the second layer precursor solution to obtain a second solution, reacting the second solution to form a second layer of the antibacterial hydrogel, and connecting the second layer with the first layer. The antibacterial hydrogel disclosed by the invention can deform in response to light and heat, so that a specific function is completed in a specific application scene, and meanwhile, in a deformation driving process, the contact surface of the antibacterial hydrogel and pollutants can be expanded, so that functional particles can be better dispersed in the first layer, more reaction sites are exposed, and the antibacterial hydrogel has a good application prospect. The antibacterial performance is greatly improved.

The present invention discloses a carbon-based electrocatalyst and a catalyst-supported electrode and its preparation and application, belonging to the field of energy storage technology batteries. The present invention uses MOF-74 (metal ions are Fe, Co, Ni, Mn) as a precursor, and high-temperature carbonization is carried out under the protection of a polymer (polyvinyl pyrrolidone, sodium lauryl sulfate, hexadecyltrimethylammonium bromide, polyether F127), which can suppress the collapse of the pore structure of MOF, and due to the unique carbon-clad metal structure formed by the carbonization of MOF-74, the catalytic graphitization of the carbon layer by the metal can improve the conductivity of the catalyst, and then obtain a carbon-based electrocatalyst and a catalyst-supported electrode with a double-layer hollow porous structure with high specific surface area and high conductivity by pickling treatment. The preparation method of the carbon-based electrocatalyst and the catalyst-supported electrode of the present invention is simple and easy to control, and has excellent energy efficiency, electrocatalytic activity and cycle stability, and is expected to achieve large-scale commercial production.

The invention provides an ice building block grooving method and an electrically-driven planing and milling type ice building block grooving machine, and belongs to the field of ice and snow landscape construction engineering. The problem that at present, grooving operation on the ice masonry mainly depends on a manual tool and fuel oil driving equipment is solved. The method comprises the steps that the number of planing and milling blades is adjusted according to the needed grooving width; according to the needed grooving depth, the angle adjusting locking structure drives the grooving depth adjusting plate to rotate around the rotating shaft, and the height of the portion, exposed below the grooving depth adjusting plate, of the planing and milling blade is changed; the relative position of the grooving depth adjusting plate and the grooving machine shell is locked through the locking nut; the electric driving structure is started and drives the planing and milling blade to rotate; and the grooving depth adjusting plate is aligned to the to-be-grooved part of the ice block and pushed in the extending direction of the to-be-grooved part, and in the grooving process, the grooving depth adjusting plate is kept to abut against the upper surface of the ice block. The grooving machine can adjust the grooving depth and width, the cost is reduced, and the environment is protected.

A biomimetic silicification-enhanced catalyst and its preparation method are disclosed. The preparation method includes the following steps: S1: Urea, iron salt, and copper salt are added to a first solvent to obtain a mixed solution; S2: The mixed solution undergoes a hydrothermal reflux reaction to obtain particle units; S3: The particle units undergo a silicification reaction with ammonia and a silica precursor to obtain a catalyst. The catalyst prepared by this method can not only reduce its band gap by copper doping to utilize visible light as a reaction light source and reduce reaction conditions, but also inhibit the aggregation of catalyst particles by utilizing the mesoporous silica layer on the surface, expose more reaction sites, and limit the heat loss of the internal particle units, thereby increasing the reaction temperature. This can effectively improve the organic matter treatment effect of the catalyst. It adsorbs and degrades dyes in wastewater through two modes: electrostatic attraction and catalytic decomposition of hydrogen peroxide to generate strong oxidizing free radicals.

The invention discloses a CuBDC nanosheet as well as a preparation method and application thereof. The CuBDC nanosheet is made of a single-layer two-dimensional CuBDC nanosheet material; the aspect ratio of the CuBDC nanosheet is 80 to 400. The CuBDC nanosheet is a single layer and has a high aspect ratio and a large specific surface area. The preparation method is simple, materials are cheap and easy to obtain, cost is low, and large-scale preparation is easy. The CuBDC nanosheet is suitable for the fields of gas storage, adsorption separation, heterogeneous catalysis, electrochemistry and analysis.