44results about How to "Effective anchoring" patented technology

The invention provides a supported catalyst as well as a preparation method and application thereof. The preparation method of the supported catalyst comprises the following steps: S1, carrying out precipitation reaction on vanadate and first ammonium salt in a first solvent to obtain a first product system containing a carrier precursor; s2, enabling the carrier precursor, a second ammonium salt, a noble metal-containing compound, a chelating agent and a first reducing agent to react in a second solvent to obtain a second product system containing a catalyst precursor; and S3, carrying out annealing treatment on the catalyst precursor and a second reducing agent in protective gas to obtain the supported catalyst. The noble metal in the supported catalyst prepared by the method is not easy to migrate and aggregate, and the stability is better. In addition, the dosage of precious metal needed by the preparation method is smaller, and the atom utilization rate is higher.

The invention relates to a full-temperature-range polymer-based solid electrolyte, a solid-state battery and a preparation method. Mixing alkali metal salt, a polymer monomer and a plasticizer to obtain an electrolyte precursor; the polymer monomer comprises a fluorinated acrylate compound; the plasticizer comprises a fluorinated carboxylic ester compound, a fluorinated carbonic ester compound or a fluorinated amide compound; and adding an initiator into the electrolyte precursor, heating and polymerizing to obtain the polymer-based solid electrolyte with the polar functional group forming the dipole group, namely the full-temperature-range polymer-based solid electrolyte. A polymer monomer with a soft long side chain is used, and plasticizer molecules are anchored between polymer chains, so that leakage of the plasticizer molecules and parasitic reaction between the plasticizer molecules and an electrode are reduced, and the interface stability of the electrolyte in a high-temperature environment is improved; a polar functional group in the solid electrolyte has relatively high electronegativity, and the formed dipole interacts with alkali metal ions, so that the ions are quickly decoupled from a polymer matrix, and the low-temperature conductivity is favorably improved.

The invention belongs to the technical field of electrochemical energy storage, and relates to a nitrogen-doped MXene loaded VCo double-monatomic catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a nitrogen-containing precursor into at least one layer of MXene suspension, and uniformly stirring to obtain a suspension; respectively dissolving a cobalt-containing compound and a vanadium-containing compound in water to prepare a cobalt-containing compound solution and a vanadium-containing compound solution, adding the cobalt-containing compound solution and the vanadium-containing compound solution into the suspension, and performing stirring, ultrasonic treatment and crushing to obtain a mixed solution; freeze-drying the mixed solution to obtain a precursor; and carrying out heat treatment on the precursor, and washing, centrifuging and drying the obtained powder to obtain the nitrogen-doped MXene loaded VCo double-monatomic catalyst. According to the invention, VCo double monatomic atoms are anchored on the surface of the few-layer MXene, so that the MXene serving as a sulfur carrier of the room-temperature sodium-sulfur battery can effectively adsorb and catalyze conversion of sodium polysulfide, and the room-temperature sodium-sulfur battery with excellent cycle life and capacity is obtained.

The invention discloses a nano-carbon supported ruthenium cluster nano-catalyst as well as a preparation method and application thereof. According to the present invention, the synthesis process of the catalyst is simple and easy to perform, the reaction process is controllable, the nanocarbon with characteristics of rich defects and large specific surface area is adopted as the carrier, the ruthenium cluster is loaded on the surface of the nanocarbon, and the nanometer catalyst with characteristics of high specific surface area and high atom utilization rate is synthesized. The catalyst can catalyze persulfate (PDS) to generate products with strong oxidation activity, namely sulfate free radicals (SO4.-), hydroxyl free radicals (. OH) and singlet oxygen (1O2), so that effective inactivation of bacteria is realized. In the invention, the reaction of activating the persulfate to disinfect by the catalyst is carried out at room temperature under neutral conditions, and in a mild reaction environment, the nanocarbon-loaded ruthenium cluster nanocatalyst shows good capability of catalyzing the persulfate to inactivate bacteria, and has huge potential in practical application of water disinfection.

The invention discloses PVA (polyvinyl alcohol) and alkali lignin-based carbon aerogel and a preparation method and application thereof.Soluble nickel salt is added in the aerogel preparation process, Ni < 2 + > and hydroxyl groups of PVA and AL (alkali lignin) form a chelation effect, the pore structure of the carbon aerogel is adjusted by adjusting the adding amount of the soluble nickel salt, and the porosity of the carbon aerogel is adjusted by adjusting the adding amount of the soluble nickel salt; the prepared carbon aerogel has a more developed and richer pore structure, so that the electromagnetic shielding effectiveness of the carbon aerogel reaches an optimal state, in addition, soluble nickel salt is converted into nickel nanoparticles after high-temperature carbonization, and the nickel nanoparticles are uniformly dispersed in the carbon aerogel, so that the conductivity and magnetic conductivity of the carbon aerogel are also favorably improved, and the electromagnetic shielding performance of the carbon aerogel is improved. Therefore, the electromagnetic shielding effectiveness of the carbon aerogel is further improved.

The invention discloses a method for improving the bending and shearing resistance of a height difference beam through CFRP cloth. The method comprises the steps that a to-be-reinforced position is determined; performing surface treatment; repairing and leveling; pasting the carbon fiber cloth; the surface of the to-be-reinforced area is coated with an interface agent; the method comprises the following steps: uniformly smearing a structural adhesive in a to-be-reinforced area at the top of a structural beam, and adhering carbon fiber cloth to the surface of the to-be-reinforced area; inverted-cone-shaped first chemical anchor bolts and inverted-cone-shaped second chemical anchor bolts are driven into the first chemical anchor bolt holes and the second chemical anchor bolt holes correspondingly; steel plate pressing strips I and II are adhered to the surfaces of the chemical anchor bolts I and II by using structural adhesive; seventhly, the high-angle end and the low-angle end of the structural beam are reinforced; a third inverted-cone-shaped chemical anchor bolt and a fourth inverted-cone-shaped chemical anchor bolt are hit into the third chemical anchor bolt hole and the fourth chemical anchor bolt hole correspondingly; inverted-cone-shaped chemical anchor bolts V and VI are driven into the positions of the chemical anchor bolt holes V and VI respectively; the L-shaped angle steel I and the L-shaped angle steel II which are matched with each other in size are respectively adhered to the outer sides of the high-angle end and the low-angle end by using structural adhesive. According to the method, the bending resistance and the shearing resistance of the height difference beam can be improved at the same time.

The invention provides a preparation method of a copper-doped nickel hydroxide self-supporting electroreduction nitrate catalyst. The preparation method comprises the following steps: ultrasonically washing foamed nickel with ethanol, diluted hydrochloric acid and ultrapure water respectively; and then transferring the treated foamed nickel to a polytetrafluoroethylene lining containing a hydrogen peroxide aqueous solution and copper salt, assembling a reaction kettle, finally putting the reaction kettle into a drying oven for reaction, cooling to room temperature, taking out the self-supporting catalyst, cleaning with water, and drying to obtain the copper-doped nickel hydroxide material. The preparation method of the catalyst is an innovative construction method of an electro-catalysis nitrate reduction catalyst, a brand-new catalysis strategy is provided for normal-temperature and normal-pressure electro-catalysis water body nitrate reduction synthesis of ammonia, meanwhile, the preparation process route of the catalyst is simple and easy to implement, high electro-catalysis performance is achieved, and the method is suitable for industrial production. Certain potential application prospects are realized.

The invention discloses a preparation method of a sulfonation catalyst for synthesizing methacrylonitrile, which comprises the following steps: adding carrier powder with large specific surface area into a beaker, and then adding an acid solution into the beaker; after uniformly stirring, carrying out suction filtration, washing and drying to obtain a carrier subjected to acid pickling treatment; adding the carrier subjected to acid pickling treatment into a hydrothermal kettle with a polytetrafluoroethylene lining, adding a sulfonation reagent and an organic reagent A, sealing the hydrothermal kettle, putting the hydrothermal kettle into a drying oven for treatment, and then performing suction filtration, washing and drying to obtain a carrier subjected to sulfonation treatment; weighing a manganese precursor and an auxiliary agent precursor, adding the manganese precursor and the auxiliary agent precursor into a beaker, adding an organic reagent B, magnetically stirring to fully dissolve, adding the sulfonated carrier into the beaker, stirring at room temperature, filtering, washing, drying, and finally roasting in a muffle furnace to obtain the sulfonation catalyst. Carrier vacancies are obtained through acid pickling, sulfonic acid groups, active elements and auxiliary elements can be effectively anchored, and the catalyst is good in stability.

The invention belongs to the technical field of petroleum and natural gas resource development, and particularly relates to an expansion metal abandoned layer isolation tool. The device comprises a central pipe, an open hole anchoring sealing assembly, a valve hoop and a feeding separation assembly. The open hole anchoring sealing assembly comprises an expansion metal anchoring sealing shell. A sealing cavity is formed between the expansion metal anchoring sealing shell and the central pipe; the upper end and the lower end of the expansion metal anchoring sealing shell are each sleeved with a set of expandable barrel type slips, and the center pipe is sleeved with the expandable barrel type slips. Through type slits are evenly distributed in the expandable barrel type slip. The valve hoop sleeves the central pipe and is in threaded connection with the central pipe; the valve hoop is provided with a channel which is communicated with the central pipe and is communicated with a sealing cavity between the central pipes of the expansion metal anchoring sealing shell; the expansion metal abandoned layer isolation tool is made of metal. The soft metal framework is expanded through hydraulic driving, meanwhile, other anchoring and sealing assemblies installed on the soft metal framework are linked to be expanded together to be attached to the stratum, and the anchoring and sealing functions are achieved.

The invention discloses a methane reforming catalyst capable of improving hydrothermal resistance as well as a preparation method and application of the methane reforming catalyst, and belongs to the technical field of catalyst preparation. According to the catalyst, a modified HAP-Ce composite carrier is prepared through coprecipitation, hydrothermal treatment and calcination, metal precursor salt serves as a modification component, Ni is impregnated and loaded, calcination is conducted, and then water vapor / nitrogen high-temperature hydrothermal treatment and hydrogen reduction are conducted to obtain the target catalyst. According to the catalyst, a heterogeneous metal oxide composite interface is constructed in situ, stable pinning of Ce species is achieved, and the Ni anchoring effect is enhanced, so that Ce migration and Ni sintering under the hydrothermal condition are inhibited, and high reaction activity, excellent carbon deposition resistance and good hydrothermal stability are shown; the preparation method has the advantages of controllable conditions and simple steps, and is easy for large-scale production and application.

The invention relates to a preparation method and application of a supported cobaltosic oxide catalyst, and the preparation method comprises the following steps: 1) dissolving a cobalt source and a carrier precursor in ethanol and water, adding 2-methylimidazole, stirring, standing, aging, and drying to obtain ZIF-67-based precipitate; and 2) carrying out primary roasting on the ZIF-67-based precipitate in a reducing atmosphere and carrying out secondary roasting in an oxidizing atmosphere in sequence to obtain the supported cobaltosic oxide catalyst, and applying the supported cobaltosic oxide catalyst to the reaction of catalyzing propane to generate carbon dioxide and water. Compared with the prior art, the method for preparing the supported cobaltosic oxide catalyst based on the ZIF-67 not only simplifies the preparation process and reduces the cost, but also remarkably improves the performance of the catalyst, and has important practical significance for improving the efficiency and economical efficiency of a VOCs catalytic oxidation technology; the preparation method provides a new and efficient solution for the development of a VOCs catalytic oxidation technology, and is expected to realize more environment-friendly and more economical VOCs treatment in industrial application.

The application discloses an environment-friendly flame-retardant master batch for crosslinked polyethylene and a preparation method thereof, and belongs to the technical field of high polymer flame-retardant materials. The flame-retardant master batch is prepared from LLDPE resin as a base material, an aluminum diethyl phosphinate, melamine polyphosphate and modified magnesium hydroxide to form a phosphorus-nitrogen-inorganic ternary synergistic flame-retardant system, the addition of sepiolite which is resistant to high temperature and flame-retardant, the modification of an interface by using a PE-g-MAH compatilizer, and the addition of compounded antioxidants, lubricants and anti-dripping agents, high-speed mixing, three-screw mixing, single-screw extrusion, surface grinding and cutting, magnetic selection and vacuum packaging. The flame-retardant master batch can make the crosslinked polyethylene material reach UL94V-0 grade with 10% of the addition amount, and has the characteristics of low smoke, environmental protection, low release, high mechanical property retention rate and the like, and is suitable for the field of electric wires and cables.

The invention discloses a porous silver nanoparticle catalyst for reducing 4-nitrophenol and its preparation and application. The preparation comprises the following steps: S1. using DVB as a raw material and AIBN as an initiator to obtain Porous PDVB; S2. adding Porous PDVB into a nitric acid mixture to obtain Porous PDVB-NO 2 ; S3. The product of S2 is reacted with SnCl 2 Add to concentrated hydrochloric acid to obtain Porous PDVB‑NH 2 ; S4. Mix the product of S3 with 2-formylpyridine and heat under reflux to obtain Porous PDVB-PA; S5. Heat the alcohol solution of Porous PDVB-PA and add AgNO 3 , rotary evaporation, washing, obtaining a precipitate, mixing the precipitate with a reducing agent, stirring, and removing impurities to obtain the product; the problem of AgNPs self-aggregation and low Ag loading is solved, and the efficiency of catalyzing sodium borohydride reduction of 4-NP is high.

The application discloses an inorganic silicon modified water-based corrosion and rust prevention paint containing functional polysiloxane as well as a preparation method and application thereof. The paint contains, in parts by weight, 30-60 parts of a water-based hybrid acrylic emulsion, 1-15 parts of functional polysiloxane, 5-25 parts of inorganic silicon-based corrosion inhibitor filler, 10-40 parts of pigment and filler, 1-5 parts of water-based additive, and the balance of water. The functional polysiloxane is amino or silanol / alkoxy functionalized polysiloxane emulsion; and the inorganic silicon-based corrosion inhibitor filler is a combination of calcium ion exchange type silica gel pigment and calcium silicate. The inorganic hybrid emulsion, the functional polysiloxane and the inorganic silicon corrosion inhibitor pigment are compounded to endow the coating with excellent physical shielding property, active corrosion inhibition and surface hydrophobicity, realize fast drying, high hardness, excellent water and salt fog resistance and long-acting corrosion prevention performance, and especially can adapt to the harsh requirements of marine environment for the water-based corrosion prevention paint, which has important significance for the development of the shipbuilding industry.

The invention discloses a residual oil hydrotreating catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: S1, mixing dolomite, cerous carbonate, a zirconium oxide precursor and a silicon dioxide precursor, drying and calcining to obtain a composite carrier, and performing in-situ pore forming by utilizing gas generated by decomposition of the dolomite and the cerous carbonate to form a mesoporous structure; s2, dipping the composite carrier in a modification liquid containing chitosan and mannuronic acid, and constructing a cross-linked network coating on the surface of the composite carrier through a Schiff base reaction to obtain a modified carrier; s3, dipping the modified carrier in a precursor solution containing a nickel source, a molybdenum source and a sulfur source, and performing adsorption, drying and roasting to obtain the catalyst. Through the synergistic effect of pore structure regulation and surface modification, the carrier with high porosity and suitable pore distribution is obtained, and meanwhile, high dispersion and stable loading of active metal components are realized. The catalyst shows excellent hydrodesulfurization, denitrification and demetallization performance in residual oil hydrotreatment.

The invention relates to the technical field of rail transit, in particular to a column-free subway station floor punching composite structure frame system and a construction method. The structural frame system comprises a concrete composite beam and concrete composite columns located at the two ends of the concrete composite beam. The concrete combination column comprises a profile steel stand column, and an end plate is arranged at the upper end of the profile steel stand column. The concrete composite beam comprises a main body beam and connecting beams, the connecting beams are located at the two ends of the main body beam, the connecting beams are connected with the profile steel stand columns and are aligned with the end plates, upper steel bars and lower steel bars are further arranged on the upper side and the lower side of the concrete composite beam respectively, the upper steel bars are connected with the soil-back sides of the profile steel stand columns, and the lower steel bars are connected with the soil-back sides of the profile steel stand columns. The lower steel bar penetrates through the profile steel stand column and then is bent. According to the invention, the overall rigidity of the perforated floor is improved, the vertical deformation of the floor is reduced, and the safety during operation is ensured.

The invention relates to the technical field of battery negative electrode materials, and provides a silicon-carbon negative electrode material, a negative electrode and a preparation method and application thereof. The method comprises the following steps: S1, preparing a silicon material A coated with elemental sulfur; s2, preparing a graphite oxide material B; s3, stirring and dispersing the elemental sulfur coated silicon material A and the graphite oxide material B in a polar solvent and a nonionic dispersant to obtain a mixed solution C; s4, adding a catalyst and a polymerization precursor into the suspension C; and S5, after filtering, washing with a polar solvent and deionized water, and drying to obtain the polymer-coated silicon carbon material negative electrode material. The surface of the nano silicon is coated with elemental sulfur, so that the cycle performance of the silicon negative electrode is improved; a polyamide coating layer formed on the surface of the graphite oxide material B through a catalyst and a polymerization precursor can effectively anchor the silicon nanoparticles on the surface of the graphite material, so that the volume expansion of the silicon nanoparticles in circulation is further reduced, and the circulation stability of the silicon-carbon negative electrode material is improved.

The present invention relates to the technical field of mercury removal in water bodies, and in particular to the preparation of a gel ball-loaded sulfur cluster multi-level pore MOFs composite material and its application in removing Hg(II) from water. The present invention provides a gel ball-loaded sulfur cluster multi-level pore MOFs composite material, comprising a framework material of sulfur cluster-modified multi-level pore UiO‑66, and a guar gum gel layer wrapped on the framework material; wherein the sulfur cluster-modified multi-level pore UiO‑66 comprises multi-level pore UiO‑66 with micropores and mesopores and sulfur active sites anchored on the multi-level pore UiO‑66. The provided gel ball-loaded sulfur cluster multi-level pore MOFs composite material has high mass transfer efficiency and high structural stability, and can realize efficient adsorption of Hg(II) in a complex water environment.

This invention provides an antistatic fabric based on modified acrylic fiber and its preparation process, belonging to the field of textile fabric technology. The process includes the following steps: first, preparing modified acrylic fiber and organosilicon quaternary ammonium salt modified CNW; then, mixing and stirring the modified acrylic fiber, DMF, and organosilicon quaternary ammonium salt modified CNW to obtain a spinning solution; mixing anhydrous ethanol and organosilicon quaternary ammonium salt modified CNW, and ultrasonically treating to obtain a dispersion; in a conjugate electrospinning device, feeding the spinning solution and dispersion into two sets of needles respectively, and electrospinning the spinning solution to form nanofibers under the action of a high-voltage electric field; feeding cotton yarn into the electric field region, causing the nanofibers to spirally wind around the surface of the cotton yarn and form a coating shell; and electrostatically spraying the dispersion to deposit the organosilicon quaternary ammonium salt modified CNW onto the surface of the coating shell; collecting and winding to obtain a fiber core-spun yarn, and weaving the fiber core-spun yarn to obtain the antistatic fabric. This invention can improve the antistatic performance of the fabric while also possessing certain antibacterial properties.

The invention discloses an organic silicon luminescent elastomer based on perovskite quantum dots as well as a preparation method and application thereof, and belongs to the technical field of preparation of photoluminescent elastomers. The organic silicon luminescent elastomer based on the perovskite quantum dots is prepared from the following components in parts by weight: 100 parts of base glue, 1 to 20 parts of modified ABX3 perovskite quantum dots, 10 to 60 parts of filler, 1 to 15 parts of cross-linking agent and 0.1 to 6 parts of catalyst, in the modified ABX3 perovskite quantum dot, A is Cs < + >, B is Pb < 2 + >, and X is Cl <->, Br <-> or I <->. The organic silicon luminescent elastomer based on the perovskite quantum dots, which has good mechanical properties and fluorescence properties, is obtained by making specific limits on all the components and the proportion of all the components; the modified ABX3 perovskite quantum dots are added, so that the modified ABX3 perovskite quantum dots can participate in a cross-linking system, are effectively anchored in a cross-linking network and have good dispersity and stability, agglomeration and intersystem streaming of the perovskite quantum dots are reduced, and good luminous intensity, luminous uniformity and continuity are achieved.

The invention discloses a catalyst for preparing C4 hydrocarbon from synthesis gas and a preparation method of the catalyst, and relates to the field of heterogeneous catalysis. The catalyst provided by the invention comprises an active component, a first metal additive, a second metal additive and a carrier, wherein the active component exists in a pore channel and on the outer surface of the carrier in a cluster form. The invention also provides at least three preparation methods of the catalyst, and provides application and application conditions of the catalyst in preparation of C4 hydrocarbon from synthesis gas. The catalyst is prepared through an in-situ packaging synthesis method, the carrier in the catalyst has a specific pore channel structure easy to diffuse and shape-selective catalytic characteristics, composite metal oxide clusters can be effectively limited, migration and agglomeration of the composite metal oxide clusters can be inhibited, and the selectivity of the packaging structure catalyst to low-carbon hydrocarbons, especially C4 hydrocarbons is improved; in addition, the stability of the packaging structure catalyst at high temperature can be improved, and the packaging structure catalyst has important industrial application potential.

This utility model relates to the field of interventional tumor diagnostic and treatment medical device technology, and discloses an umbrella-shaped anchored tumor marker and its implantation system. The umbrella-shaped anchored tumor marker includes an umbrella-shaped anchoring system composed of multiple umbrella ribs with shape memory properties. The proximal ends of the ribs converge to form an axial central tube. The surface of the ribs has micro-barb structures formed by laser etching. The umbrella-shaped anchoring system remains in a contracted state at temperatures below body temperature and autonomously unfolds into a three-dimensional umbrella-shaped anchoring form at body temperature. In this utility model, the distal end of the umbrella ribs integrates a platinum-iridium alloy imaging tip with gradient stiffness (rigid at the proximal end and flexible at the distal end). The barbs are spaced along the length of the umbrella ribs. The shape memory alloy is in one state during delivery at room temperature and can self-unfold in vivo, achieving effective anchoring and imaging, thus aiding in tumor marking.

The present invention relates to a quaternary ammonium xylan coating mercury ion detection paper-based chip and its preparation method and application. The preparation method comprises: quaternary ammonium xylan is modified to obtain quaternary ammonium xylan, and gold nanoparticles are prepared using the quaternary ammonium xylan as a reducing agent, and then Raman beacon molecules are added to the system to obtain a quaternary ammonium xylan / gold nanoparticle / Raman beacon molecule composite coating material; the composite coating material is applied to the surface of paper, and then immersed in a silver ion solution to utilize the reducing property of the quaternary ammonium xylan to in-situ reduce the silver ions to silver nanoparticles deposited on the coating surface, thereby obtaining a quaternary ammonium xylan coating mercury ion detection paper-based chip. The present invention utilizes the chloride ions loaded by the quaternary ammonium group on the quaternary ammonium xylan to react specifically with mercury ions, and proportionally interfere with the Raman signal, thereby achieving the effect of high sensitivity and quantitative detection of mercury ions, and also has the advantages of mild preparation conditions and environmentally friendly preparation raw materials.

The application discloses a kind of Ce-La composite carrier load Cu-Ni bimetallic photo-thermal catalyst and its preparation method, for the defects of existing pure carrier oxygen vacancy concentration fixed, active metal is easy high-temperature agglomeration, catalytic activity and stability are insufficient, the Ce-La composite carrier is constructed by La doping modification in the application, and Cu-Ni bimetallic is formed 8Cu2Ni / aCebLa catalyst.La exists in the form of La-Ce-O solid solution, significantly improves the carrier oxygen vacancy concentration and activation capacity, while strengthening metal-carrier interaction, anchoring bimetallic particles to inhibit sintering, improve catalyst stability.

This invention relates to a C x N y This invention relates to a Pt@C fuel cell catalyst and its preparation method, belonging to the field of fuel cell catalyst technology. First, Pt@C is synthesized via a solvothermal reaction using ethylene glycol reduction. Then, it is mixed with a nitrogen-containing polymer material and cobalt chloride hexahydrate, and subjected to reduction in a reducing atmosphere, high-temperature treatment, carbon pyrolysis, and alloying to obtain porous nitrogen-containing carbon-coated Pt@C. x N y @PtCo / C catalyst. In the prepared catalyst, the porous coating layer significantly reduces the poisoning of catalyst particles by resin during fuel cell operation, improves cell activity, and extends cell life, exhibiting excellent activity and durability.

The invention discloses a method for preparing a metal-nitrogen element co-doped carbon material by utilizing a waste artificial board and application of the metal-nitrogen element co-doped carbon material, and belongs to the technical field of artificial board waste treatment. According to the invention, the waste artificial board is used as a precursor, and metal elements and nitrogen atoms in the artificial board adhesive are introduced to be anchored in the precursor through coordination, so that the dispersibility and catalytic performance of metal active sites in a carbon skeleton are improved, and the artificial board can be used as a metal-nitrogen element co-doped carbon material. The used raw materials are waste resources, the preparation process is simple, and the obtained metal-nitrogen co-doped carbon material is large in specific surface area, excellent in catalytic activity and reusable, is a bio-based functional material with excellent performance, and can be used in the fields of pollutant adsorption in a water body environment, industrial catalysis and the like.

The utility model discloses a high pressure sand prevention hydraulic anchor for fracturing relates to hydraulic anchor technical field, the utility model discloses, including the anchor body, the surface of anchor body is opened with several groups of ladder hole, and the surface of anchor body and the opposite place of ladder hole is equipped with the mounting groove, the anchor claw is movably inserted in the ladder hole, the utility model discloses, through the sand prevention filter assembly of the slot in this anchor claw surface setting, can block the sand particle and enter the clearance between anchor claw and ladder hole, and then avoid the anchor claw to appear the jamming phenomenon when moving in the ladder hole, the anchor plate of mounting groove through screw fixed, anchor claw and anchor plate are movably inserted, and the spring between both can provide elastic force, so that when anchor claw can be withdrawn when no pressure or pressure reduces, realizes the anchor, and the rubber washer can enhance the sealing between anchor claw and ladder hole, guarantee the stability and reliability of anchoring, make the hydraulic anchor can effectively anchor the pipe column under the high pressure fracturing environment, prevent its displacement.

The invention relates to an ultrathin carbon nanosheet loaded high-entropy monatomic catalyst synthesized under assistance of molten salt as well as a preparation method and application of the ultrathin carbon nanosheet loaded high-entropy monatomic catalyst. The preparation method of the ultrathin carbon nanosheet loaded high-entropy monatomic catalyst comprises the following steps: providing ZIF-67 powder; coating with a dopamine solution, so as to obtain ZIF-67 (at) PDA powder; the obtained ZIF-67 (at) PDA powder is subjected to heat treatment, and a Co organic framework hollow dodecahedron coated with dopamine is obtained; then adding soluble metal salt and fused salt, and further pyrolyzing in a nitrogen atmosphere; and finally, carrying out acid washing and water washing to obtain the high-entropy monatomic catalyst loaded on the ultrathin carbon nanosheet. The preparation method of the ultrathin carbon nanosheet loaded high-entropy monatomic catalyst is energy-saving, adopts a molten salt process, and is mild in reaction condition; the prepared ultrathin carbon nanosheet is large in specific surface area, provides a larger reaction activity surface, and is applied to a lithium-sulfur battery, so that the lithium-sulfur battery shows excellent cycle performance.

The invention belongs to the technical field of petroleum and natural gas resource development, and particularly relates to an expansion metal open hole anchoring packer. The device comprises a central pipe, an open hole anchoring sealing assembly and a valve hoop. The open hole anchoring sealing assembly comprises an expansion metal anchoring sealing shell. A sealing cavity is formed between the expansion metal anchoring sealing shell and the central pipe; the upper end and the lower end of the expansion metal anchoring sealing shell are each sleeved with a set of expandable barrel type slips, and the center pipe is sleeved with the expandable barrel type slips. Through type slits are evenly distributed in the expandable barrel type slip. The valve hoop sleeves the central pipe and is in threaded connection with the central pipe; the valve hoop is provided with a channel which is communicated with the central pipe and is communicated with a sealing cavity between the central pipes of the expansion metal anchoring sealing shell; the expansion metal open hole anchoring packer is made of metal. The soft metal framework is expanded through hydraulic driving, meanwhile, other anchoring and sealing assemblies installed on the soft metal framework are linked to be expanded together to be attached to the stratum, and the anchoring and sealing functions are achieved.

This invention provides a self-grown nitrogen-doped carbon nanotube composite material based on a MOF template. The composite material uses a cobalt salt as the metal center and an organic compound as the ligand to synthesize a metal-organic framework template, followed by the autocatalytic generation of nitrogen-doped carbon nanotubes under an inert atmosphere. The preparation method includes: first, preparing a MOF template using a cobalt salt and organic ligand; then, introducing a nickel source onto the template surface via a hydrothermal reaction to obtain a composite precursor; finally, using dicyandiamine as both a nitrogen and carbon source, stepwise calcining the composite precursor to allow in-situ growth of MOF-template-derived carbon nanotubes, simultaneously forming a Ni / Co2N alloy to obtain the composite material. The composite material of this invention possesses a stable structure and excellent catalytic activity. Using it as a cathode catalyst in lithium-air batteries can effectively reduce polarization during the charge-discharge reaction process, improve the battery's rate capability and cycle performance, and the preparation process is relatively simple, showing promising application prospects.