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67results about How to "Suppress stacking" patented technology
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Composite nanostructure based on three-dimensional porous transition metal carbide Ti3C2MXene and general preparation method thereof
InactiveCN110589786AFix production issuesSolve application problemsTitanium carbideNickel oxides/hydroxidesChemical reactionMetal-organic framework
The invention discloses a composite nanostructure based on a three-dimensional porous transition metal carbide Ti3C2MXene and a general preparation method thereof, and belongs to the field of nanomaterials. The three-dimensional composite structure is composed of a three-dimensional porous Mxene-supported inorganic nanostructure, and has a honeycomb hierarchical porous structure. A precursor of atwo-dimensional transition metal carbide and a metal-organic framework compound is subjected to high-temperature pyrolysis or a chemical reaction in an inert or reactive atmosphere to prepare the composite nanostructure with a controllable size. According to the composite nanostructure, stacking of MXene itself is inhibited, an active surface area, porosity, and ion permeability of MXene are increased, and thereby a surface interface of MXene is efficiently used. At the same time, introduction of the metal-organic framework compound realizes uniform and stable compounding of the three-dimensional porous MXene and an inorganic nanomaterial, the fundamental difficult problem that plagues exerting and application of inorganic nanomaterial performance is solved, and the composite nanostructurehas wide application prospects in the fields such as catalysis, energy, photo-electricity, space technology, and military industry.
Owner:DALIAN UNIV OF TECH
Graphene-polypyrrole composite aerogel and preparation method and application thereof
ActiveCN105368045AImprove mechanical propertiesSuppress stackingHybrid capacitor electrodesOrganic dyePolypyrrole
The invention discloses graphene-polypyrrole composite aerogel and a preparation method and application thereof. The aerogel is mainly formed by compositing graphene and polypyrrole and has the advantages of being appropriate in pore diameter, large in porosity, high in specific surface area, low in density, good in electric conductivity of 0.1-100 S / m, high in energy storage modulus and the like. The preparation method of the aerogel comprises the steps that oxidized graphene and pyrrole monomers are taken as raw materials, the oxidized graphene is dispersed into uniform and stable dispersion liquid in an acidic or neutral environment, the oxidized graphene and the pyrrole are mixed evenly through mechanical stirring and ultrasound, standing is performed on gel at room temperature, and then drying is performed to obtain the graphene-polypyrrole composite aerogel. The aerogel obtained through the method is excellent in comprehensive performance, can serve as an electrode material of a supercapacitor, an adsorbing agent for aromatic organic dye and the like and is simple in preparation technology, low in energy consumption, green, environmentally friendly and suitable for mass production.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Preparation method of ultrathin graphite phase carbon nitride
ActiveCN106477539AUniform thicknessGood dispersionNitrogen and non-metal compoundsOrganic solventCarbon nitride
The invention provides a preparation method of ultrathin graphite phase carbon nitride. The preparation method comprises steps as follows: melamine is calcined firstly, and blocky g-C3N4 is obtained; blocky g-C3N4 is uniformly dispersed in deionized water and subjected to ultrasonication; a product obtained after ultrasonication is subjected to centrifugal separation, and solids are collected and dried; finally, a dried product is calcined again, and a target product is obtained. According to the preparation method of ultrathin graphite phase carbon nitride, mass preparation and thickness regulation of ultrathin g-C3N4 with the thickness of 0.8-1.2 nm equal to the thickness of 3-4 atom layers are realized, no organic solvent or toxic chemical reagent participates in a reaction process, so that the problems of structure defects and environmental pollution which are caused by introduction of impurities can be effectively solved, and on the basis of the non-toxic characteristic of prepared g-C3N4, the preparation method can be widely applied to photocatalysis, electro-catalysis, biosensing, bioimaging and spintronics. The whole preparation process is simple to operate, high in controllability, good in repeatability, green, environment-friendly and suitable for large-scale production.
Owner:XI AN JIAOTONG UNIV
Method for preparing functionalized graphene through Mannich reaction
The invention discloses a method for preparing functionalized graphene through Mannich reaction. The method comprises the following steps of: reducing oxidized graphene by taking plant polyphenols and derivatives of the plant polyphenols as reducing agents to obtain the polyphenol modified graphene; and then preparing the functional graphene with amphipathy through Mannich reaction between polyphenol groups on the surface of the graphene and polyether amine. The method disclosed by the method has the advantages of mild preparation conditions, simple and efficient purification process and no-purification of intermediate products. Simultaneously, raw materials for preparation of the functionalized graphene comprise the reducing agents and a modifier and have the characteristics of rich sources and low cost, and therefore, the functionalized graphene and colloids thereof can be efficiently prepared on a large scale. The functionalized graphene can be used for directly preparing a graphene hybrid material with excellent electric conductivity and toughness, has very good solvent dispersivity and excellent storage stability, and is suitable for compounding with various polymers to prepare a polymer / graphene composite material with high performance.
Owner:SOUTH CHINA UNIV OF TECH
Composite lithium metal negative electrode based on MXene aerogel and synthesis method thereof
InactiveCN110429242AReduce local current densityInhibition of volume expansionElectrochemical processing of electrodesNegative electrodesSynthesis methodsNucleation
The invention discloses a composite lithium metal negative electrode based on an MXene aerogel and a synthesis method thereof, which belong to the field of lithium batteries. The composite lithium metal negative electrode comprises metal lithium and the MXene aerogel, wherein the MXene aerogel is assembled by cross-linking of two-dimensional MXene sheets and has a three-dimensional hierarchical porous structure; the MXene aerogel pores are filled with the metal lithium; and the thickness of the MXene aerogel is 300 mum to 800 mum. According to the composite lithium metal negative electrode prepared in the invention, rich pro-lithium functional groups on the surface of the MXene aerogel can be specifically combined with the lithium ions, uniform nucleation of lithium is thus realized, formation of lithium dendrites is suppressed, and the coulombic efficiency, the safety and the cycle life of the lithium metal negative electrode are effectively improved.
Owner:DALIAN UNIV OF TECH
Fixed carrier membrane with slice screening channel and preparation method and application thereof
The invention discloses a fixed carrier membrane with a slice screening channel and a preparation method and application thereof. The method comprises the following steps: in-situ synthesizing a zeolite imidazate framework material ZIF-8 in a graphene oxide dispersing solution; chemically acting through ethylenediamine molecule and carboxyl and epoxy group in graphene oxide to realize amination modification of graphene oxide; in-situ loading the zeolite imidazate framework material on the surface of aminated graphene oxide to obtain a product A; adding the product A to a polyvinylamine solution to obtain a uniform membrane casting solution; and then coating the surface of a microfiltration membrane with a layer of functional membrane which is 1-100 microns in thickness. According to the preparation method, the zeolite imidazate framework material ZIF-8 is among the slices of graphene oxide, so that the channel between the graphene oxide slices can be regulated; and a quick transferring channel is provided for the transmission of CO2 during the separating and purifying of the CO2 in mixed gas, so that the CO2 permeation rate is high, and more separating factors are provided.
Owner:山西兴源盛科技有限公司
Method for synchronously reducing and modifying graphene oxide
InactiveCN103641109AAbundant resourcesGood dispersionMaterial nanotechnologyGrapheneCarbon chainDouble bond
The invention discloses a method for synchronously reducing and modifying graphene oxide, and particularly relates to a method for preparing graphene containing a large number of long carbon chains on the surface as well as polymerizable carbon-carbon double bonds and showing good dispersibility in an organic solvent through chemical reduction by taking the extraction liquid urushiol of the Chinese lacquer tree or the extraction liquid cardanol of cashew nut shell as a reducing agent and a modifying agent without adding any stabilizer or dispersant, which provides convenience to the follow-up preparation of a graphene-based polymer composite. The method disclosed by the invention is green and environment-friendly, simple in process, low in production cost and easy to popularize and use; the reaction process is easy to control; and particularly, the surface-modified unsaturated urushiol or cardanol with a long side carbon chain can be crosslinked or blended with most polymers, thereby being favorable for applying the modified graphene to the field of new materials such as high-molecular composites.
Owner:FUJIAN NORMAL UNIV
Graphene/MXene composite fiber flexible electrode material based on solid electrolyte and preparation method of knittable supercapacitor
PendingCN111799097AGood biocompatibilityImprove electrochemical performanceHybrid capacitor electrodesHybrid/EDL manufactureSolid state electrolyteFiber
The invention relates to a graphene / MXene composite fiber flexible electrode material based on a solid electrolyte and a preparation method of a knittable supercapacitor. High-performance graphene oxide and MXene nanosheets are prepared through an improved Hummers method and an etching method, a macroscopic graphene / MXene composite fiber electrode material is prepared through wet spinning by meansof the liquid crystal self-assembly behavior of the graphene oxide and the MXene nanosheets, and the macroscopic graphene / MXene composite fiber electrode material is assembled into the supercapacitor. The preparation method is simple in process and low in equipment requirement, and the prepared flexible knittable supercapacitor is good in biocompatibility, has excellent electrochemical performance and good flexibility and stretchability, and can be widely applied to the fields of portable and wearable electronic equipment and the like.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Titanium carbide nanosheet/layered indium sulfide heterojunction and application of the same in degrading and removing water pollutant
ActiveCN110038607ASmall sizeImprove securityWater/sewage treatment by irradiationWater treatment compoundsHeterojunctionIndium
Owner:SUZHOU UNIV
Preparation and application of graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents
ActiveCN111188196AIncrease temperatureImprove catalytic degradation efficiencyCarbon fibresOrganic-compounds/hydrides/coordination-complexes catalystsFiltrationHalf-life
The invention discloses preparation and application of a graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents, and belongs to the field of chemicalprevention. MOFs (Metal Organic Frameworks) nanoparticles are synthesized on the surface of fibers by a solvothermal method by using graphene fibers as carriers, wherein the diameter of the graphene fibers is 20 to 100 [mu]m; an MOFs catalyst is UiO-66-NH2; the particle dimension is 50 to 400 nm; and the composite fiber nonwoven fabric is graphene@UiO-66-NH2, and the thickness is 50 to 300 [mu]m.The graphene composite fiber nonwoven fabric is prepared through wet spinning and subsequent vacuum suction filtration, and has an efficient photothermal conversion effect. Under the condition of simulated sunlight, the catalytic degradation half-life period of the graphene@UiO-66-NH2 on an optimum analog of methyl paraoxon of a nerve poison of GD is 1.6 min; complete degradation can be almost realized within 20 min; and excellent capability of fast and catalytically degrading the neuropathic chemical warfare agents is shown.
Owner:BEIJING UNIV OF CHEM TECH
Hollow MXenes-based metal oxide composite material and preparation method and application thereof
ActiveCN111799095ASuppress stackingLarge specific surface areaHybrid capacitor electrodesGrapheneCapacitanceInter layer
The invention discloses a hollow MXenes-based metal oxide composite material. The hollow MXenes-based metal oxide composite material comprises the following components: V2CTx MXenes, reduced grapheneoxide and metal oxide. The V2CTx MXenes are obtained by treating a substrate material with an etching agent, a layer expanding agent and an ionic liquid. The reduced graphene oxide is used as an intermediate layer material and has the effects of connecting, inhibiting stacking and inducing growth. The morphology of the metal oxide NiMoO4 is of a petal wrinkle-shaped structure, and pseudocapacitance is provided. The microstructure of the composite material has a carbon shell 'embedded' hollow structure. The key technology of the preparation method is as follows: the microstructure is regulatedand controlled by adopting a non-constant centrifugal condition and an ionic liquid. When the material is used as a supercapacitor, the supercapacitor is charged and discharged in a range of-0.2 V to0.35 V, and when the discharge current density is 1 A / g, the specific capacitance is 1000-1100 F / g. The specific capacitance performance can still reach 88-89% of the original specific capacitance performance after 3000 cycles under the current density of 10 A / g. And excellent electrochemical characteristics and chemical stability are achieved.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Method for preparing RGO/MXene-sulfuric acid supercapacitor flexible electrode with compact structure in one step and application of RGO/MXene-sulfuric acid supercapacitor flexible electrode
ActiveCN110993375ASuppress stackingInhibition of agglomerationHybrid capacitor electrodesHybrid/EDL manufactureElectrolytic agentSupercapacitor
The invention belongs to the field of electrochemistry, and particularly relates to a method for preparing a graphene / MXene-sulfuric acid supercapacitor flexible electrode with a compact structure inone step and an application of the graphene / MXene-sulfuric acid supercapacitor flexible electrode. The preparation method comprises the following steps of mixing a graphene oxide aqueous dispersion with an MXene aqueous dispersion, adding sulfuric acid, and uniformly mixing; and soaking a metal zinc sheet into the uniformly mixed solution, standing to obtain a composite film on the surface of themetal zinc sheet, and stripping to obtain the RGO / MXene-H2SO4 composite film. According to the invention, the RGO / MXene-H2SO4 composite film with an orderly arranged compact structure is prepared by adopting a layer-by-layer assembly method, and the non-volatile liquid electrolyte molecules are synchronously and horizontally distributed on the surface of an electrode material in the self-assemblyprocess of the film, so that the full contact between the electrode material and the electrolyte is realized. The method has the advantages of being simple, high in designability, wide in applicability, good in electrochemical performance and the like, and has the wide application prospects in the fields of electrochemical materials and the like.
Owner:SHANDONG UNIV OF TECH
Preparation methods of pyridine nitrogen enriched ultrathin carbon nanosheet material and metal composite of pyridine nitrogen enriched ultrathin carbon nanosheet material
ActiveCN109052367AEnhancementImprove electrochemical performanceMaterial nanotechnologyHybrid capacitor electrodesCapacitanceNitrogen doped
The invention discloses preparation methods and applications of a pyridine nitrogen enriched ultrathin carbon nanosheet material and metal composite of the pyridine nitrogen enriched ultrathin carbonnanosheet material. Specifically, a nitrogen source and a carbon source are mixed, the mixture reacts under a high-temperature condition, and solid phase mixing is adopted. The nitrogen source can bemelamine, dicyandiamide, cyanamide or urea and the like, and the carbon source can be D-GAH (glucosamine hydrochloride), glucose or 2-methylimidazole and the like. The obtained nitrogen-doped carbon nanosheet material and the metal composite thereof have the characteristics of high nitrogen doping levels and size graded porous combined structures in composition and structure, have higher specificcapacitance, better chemical stability and thermal stability, higher cycle stability and more ideal conductivity and the like. The composite electrode is tested as a working electrode material of a supercapacitor and still has higher specific capacitance, better rate performance and cycle stability under the condition of large current density.
Owner:HUAZHONG UNIV OF SCI & TECH
Graphene/graphene analogue WS2/bismaleimide composite material modified by cyclotriphosphazene polymer and preparation method thereof
InactiveCN108641356AGood dispersionImprove the bonding strength of the interfacePolymer scienceHigh pressure
The invention relates to a graphene / graphene analogue WS2 / bismaleimide composite material modified by cyclotriphosphazene polymer and a preparation method thereof. Firstly, WS2 is stripped into grapheme analogue WS2 by using methods of low-energy ball milling and ultrasonic, then, the grapheme analogue WS2 is added into a high-temperature high-pressure reaction kettle together with an oxidized graphite, a proper amount of hydrazine hydrate is added and a pot hydrothermal method is used to prepare the graphene / graphene analogue WS2. Then, the graphene / graphene analogue WS2, phosphonitrilic chloride trimer, and branched polyethyleneimine are used as a raw materials, triethylamine is used as an acid-binding agent, and the graphene / graphene WS2 modified by cyclotriphosphazene polymer is prepared by using an in-situ template method. Finally, the composite material is prepared by mixing the graphene / graphene WS2 modified by cyclotriphosphazene polymer, diphenylethane dimaleimide and diallylbisphenol A in a certain proportion. The prepared composite material has good interface bonding strength, and excellent mechanical property and tribology performance.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
MXene/graphene/carbon nanotube gel with high magnification and long service life as well as preparation method and application of MXene/graphene/carbon nanotube gel
ActiveCN113628893ASolve easy oxidationPrevent oxidationHybrid capacitor electrodesHybrid/EDL manufactureElectrolytic agentVitamin C
The invention discloses MXene / graphene / carbon nanotube gel with high magnification and long service life as well as a preparation method and application of the MXene / graphene / carbon nanotube gel. The invention belongs to the field of supercapacitor electrode materials and preparation thereof. The invention aims to solve the technical problem that the existing supercapacitor electrode material MXene is easy to oxidize, stack and agglomerate. The MXene / graphene / carbon nanotube gel provided by the invention is formed by mutual crosslinking of a two-dimensional MXene sheet layer, a graphene nanosheet and a carbon nanotube, and the MXene / graphene / carbon nanotube gel has a three-dimensional hierarchical porous structure. The three-dimensional porous open structure effectively inhibits serious stacking and agglomeration of two-dimensional MXene sheet layers, improves the surface utilization rate of the MXene material, increases the number of active sites, and increases the specific capacity of the material; meanwhile, due to the addition of graphene and vitamin C, the oxidation of MXene can be inhibited, so that the gel has relatively good oxidation resistance; in addition, the porous structure can be used as a reservoir to shorten the diffusion path of electrolyte ions and improve the rate characteristic of the electrode.
Owner:HARBIN ENG UNIV
Lanthanum cobaltate/attapulgite/reduced graphene oxide nano-structure composite material, preparation method, and application thereof
ActiveCN107159223AEvenly dispersedImprove composite effectDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsWater bathsNano structuring
The invention belongs to the field of novel chemical materials and especially relates to a lanthanum cobaltate / attapulgite / reduced graphene oxide nano-structure composite material, a preparation method, and an application thereof. The preparation method includes the steps of: 1) preparing lanthanum cobaltate / attapulgite through a sol-gel process, adding the lanthanum cobaltate / attapulgite to deionized water and acidifying the liquid and regulating pH value to obtain a lanthanum cobaltate / attapulgite water solution carrying positive charges; 2) reducing graphite oxide with hydrazine hydrate to produce reduced graphene oxide carrying negative charges, and mixing the reduced graphene oxide with the lanthanum cobaltate / attapulgite water solution, stirring the mixture in water bath, performing a reaction, and drying a reaction product to obtain a perovskite / attapulgite / reduced graphene oxide composite material. With the composite material as a catalyst for performing photo-SCR denitration, conversion rate on NOx in a low-temperature zone (100-200 DEG C) can reach more than 95%.
Owner:CHANGZHOU UNIV
Aperture-controllable honeycomb three-dimensional porous MXene and general synthesis method thereof
InactiveCN110606487ASuppress stackingInhibition of agglomerationCarbon compoundsNitrogen-metal/silicon/boron binary compoundsSynthesis methodsHierarchical porous
The invention discloses an aperture-controllable honeycomb three-dimensional porous MXene and a general synthesis method thereof, and belongs to the field of nano materials. According to the method, two-dimensional transition metal carbide MXene and a corresponding polymer template are used as precursors, and the honeycomb three-dimensional porous transition metal carbide with the controllable internal pore size is prepared through a spray pyrolysis technology. The honeycomb three-dimensional porous transition metal carbide prepared by the method is of a hierarchical porous three-dimensional structure formed by three-dimensional tight crosslinking of the two-dimensional MXene, the pore size is 260-800 nm, the pyrolysis time is extremely short, and the honeycomb three-dimensional porous transition metal carbide has excellent conductivity and has the specific surface area and pore volume far exceeding those of the two-dimensional MXene; the porosity and the ion permeability are greatly improved, so that an MXene surface interface is efficiently utilized, the application and processing properties of the MXene surface interface are improved, and the disclosed MXene has a wide application prospect in the fields of catalysis, energy, photoelectricity, space technology, war industry and the like.
Owner:DALIAN UNIV OF TECH
Preparation method of MXene-based composite aerogel
ActiveCN113101877AWith superelastic mechanical propertiesImprove electrochemical performanceCarbon compoundsNitrogen-metal/silicon/boron binary compoundsFreeze-dryingElectrochemistry
The invention discloses a preparation method of MXene-based composite aerogel. The preparation method comprises the following steps: adding MXene into deionized water, and carrying out ultrasonic treatment and stirring to obtain MXene dispersion liquid; adding functionalized nano cellulose crystals into the MXene dispersion liquid, performing stirring, carrying out molecular self-assembly, adding polyurethane, continuously stirring and carrying out chemical crosslinking; and after the reaction is finished, carrying out liquid nitrogen freezing and ice crystal volatilization to obtain the MXene-based composite aerogel. The preparation method is characterized by taking the functionalized nano cellulose crystals as an assembling agent and a template, carrying out phase separation and self-assembly on the functionalized nano cellulose crystals and MXene two-dimensional nanosheets, then carrying out chemical crosslinking reaction with waterborne polyurethane, and then carrying out directional freeze-drying operation to obtain the MXene-based composite aerogel material with a three-dimensional directional internal pore channel structure. The MXene-based composite aerogel material not only has a super-elastic mechanical property, but also has an excellent electrochemical property.
Owner:NANJING FORESTRY UNIV
Three-dimensional fold structure Ti3C2 Mxene as well as preparation method and application thereof
PendingCN114709379ASuppress stackingInhibition of agglomerationCell electrodesActive agentPhysical chemistry
The invention discloses Ti3C2Mxene with a three-dimensional fold structure as well as a preparation method and application of the Ti3C2Mxene. The preparation method comprises the following steps: (S1) obtaining dispersion liquid of the Ti3C2Mxene; and (S2) mixing a cationic surface active agent with the dispersion liquid of the Ti3C2MXene, and carrying out a reaction, so as to obtain the Ti3C2MXene with the three-dimensional fold structure. Aiming at the problems of poor conductivity, volume change and the like of 2H-MoS2, 1T-MoS2 is compounded with three-dimensional fold structure Ti3C2Mxene, so that the conductivity of the material is improved, and the stacking and agglomeration of the material are inhibited.
Owner:NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
Lithium titanate composite negative electrode material, preparation method thereof and lithium-ion battery
ActiveCN110416537AImprove hydrophilicitySuppress stackingMaterial nanotechnologySecondary cellsCarbon compositesNanoparticle
The invention discloses a lithium titanate composite negative electrode material, a preparation method thereof and a lithium-ion battery. The technical problem to be solved is to improve the electrochemical performance of the lithium titanate composite negative electrode material. The preparation method of the lithium titanate composite negative electrode material comprises the steps of preparinga transition group metal salt solution, preparing MXene particles loaded with transition metal salt, preparing a MXene and nano carbon composite material, performing acid purification on the MXene andnano carbon composite material, preparing a precursor, and calcining to obtain the lithium titanate composite negative electrode material. In the lithium-ion battery of the present invention, a negative electrode is made of the lithium titanate composite negative electrode material of the invention, compared with the prior art, lithium titanate nanoparticles are jointed with a flexible frame woven by MXene and nano carbon, the composite material with three-dimensional self-supporting properties of lithium titanate, the MXene and the nano carbon is obtained, the composite material has the advantages of good conductive performance and good cycle stability, and the electrochemical performance and safety of the lithium-ion battery are effectively improved.
Owner:GUANGDONG DONGDAO NEW ENERGY
Modification method of easily-to-grab anti-skid swim ring
InactiveCN110791191AGood wear resistanceEvenly dispersedLiquid surface applicatorsPolyurea/polyurethane coatingsCalcium carbonateGlycerol
The invention discloses a modification method of an easily-to-grab anti-skid swim ring. The modification method comprises the following steps: mixing graphene oxide and modified molybdenum disulfide,adding deionized water, sealing, carrying out ultrasonic stirring, adding ammonia water to adjust the pH value to be neutral, adding waterborne polyurethane, and uniformly mixing to obtain pretreatedwaterborne polyurethane; adding modified nano calcium carbonate and modified silicon dioxide into the obtained pretreated waterborne polyurethane, heating and magnetically stirring, adding plasticizerglycerol, continuously stirring, standing and degassing to obtain an antiskid wear-resistant coating; and uniformly coating the surface of a swim ring with the obtained antiskid wear-resistant coating by using a coating rod, naturally drying, and carrying out rewetting treatment in a constant-temperature and constant-humidity box to obtain the antiskid wear-resistant swim ring.
Owner:界首市睿阳塑胶科技有限公司
Boron-doped graphene aerogel and preparation method and application thereof
PendingCN112390249AImprove thermal stabilityShape is easy to controlGrapheneDoped grapheneGraphene flake
The invention provides boron-doped graphene aerogel and a preparation method and application thereof. The preparation method includes the steps that graphene oxide serves as a carbon source, boric acid serves as a boron source, and graphene dispersion liquid with different concentrations is prepared, and the stable and high-performance boron-doped graphene aerogel is prepared by using a simple one-step hydrothermal synthesis method. The product obtained by hydrothermal reaction has a special three-dimensional porous structure, and the communicated mesopores on the surface of the boron-doped graphene aerogel inhibit the agglomeration phenomenon of the graphene sheet layer, thereby greatly enhancing the specific surface area of the macroscopic graphene material. Meanwhile, the clearly-layered three-dimensional porous structure can improve the ion transmission efficiency, so that the performance of the boron-doped graphene aerogel as a supercapacitor electrode is improved.
Owner:SHAANXI SCI TECH UNIV
A kind of molybdenum sulfoselenide/carbon nanotube composite material and its preparation and application
InactiveCN105932252BImprove electrochemical performanceInhibition of agglomerationHybrid capacitor electrodesCell electrodesDecompositionCarbon nanotube
Owner:DONGHUA UNIV
Hollow LDH/MnO2 nanocage composite material as well as preparation method and application thereof
ActiveCN112054214ASuppress stackingImprove cycle stabilityMaterial nanotechnologyFuel and secondary cellsEtchingLithium–air battery
The invention provides a hollow LDH / MnO2 nanocage composite material as well as a preparation method and application thereof, and the preparation method comprises the following steps: by taking ZIF-67as a self-template, forming a hollow LDH nanocage in situ by adopting simple etching and hydrothermal reaction, and growing ultrathin MnO2 nanosheets on the hollow LDH nanocage to obtain the LDH / MnO2nanocage composite material with a hollow dodecahedron structure. The preparation method disclosed by the invention is simple and easy to control in preparation process, environment-friendly and suitable for large-scale industrial production. The hollow structure and synergistic effect of the composite material can fully expose active sites and accelerate the mass transfer process, and when the composite material is used as a positive electrode material for a lithium-air battery, the reaction kinetics can be accelerated, the charging overpotential can be reduced, and the cycling stability ofthe battery can be improved.
Owner:SHANDONG UNIV
Functionalized graphene oxide, preparation method and application thereof
ActiveCN109535770ASuppress stackingImprove aging resistancePigment treatment with non-polymer organic compoundsIce waterPolyphenol
The invention discloses a preparation method of functionalized graphene oxide. The method includes: under an ice-water bath condition, adding cyanuric chloride into a mixed solution of acetone and water, stirring the substances evenly, adding ammonia water, carrying out reaction at 1-5DEG C for 30-50min, and then conducting filtering, washing and drying to obtain a material A; adding the materialA into 1, 4-dioxane, mixing the substances evenly, adding a 1, 4-dioxane solution of p-aminodiphenyl amine and sodium carbonate, conducting stirring at room temperature for 30-100min, and performing filtering, washing and drying to obtain a material B; adding the material B into 1, 4-dioxane, adding 1H, 1H-perfluorooctylamine, adjusting the pH to 7, carrying out reaction at 80-90DEG C for 3-4h, and conducting standing, filtering and drying to obtain a material C; subjecting graphene oxide to acylating chlorination, then adding the product into dimethylformamide, adding a material C, carrying out reaction at 80-90DEG C for 20-30h, conducting filtering and drying, mixing the obtained material with plant polyphenol and water evenly, carrying out reaction at 35-60DEG C for 30-48h, and performing drying.
Owner:JILIN NORMAL UNIV
Phosphine-containing fused heterocyclic compound as well as preparation method and application thereof
ActiveCN110483576AStrong electron-withdrawingLower LUMO levelGroup 5/15 element organic compoundsSolid-state devicesHigh electronOxygen
The invention provides a phosphine-containing fused heterocyclic compound as well as a preparation method and an application thereof. The phosphine-containing fused heterocyclic compound has a structure as shown in a formula I, a formula II, a formula III, a formula IV or a formula V. The phosphine-containing fused heterocyclic compound provided by the invention has double phosphorus-oxygen bonds,and an electron-withdrawing or large-volume Ar3 group and an Ar4 group are introduced; therefore, the material has a low LUMO energy level, a high electron transport capability and a high thermal decomposition temperature, can be used as an electron transport material of a photoelectric device, reduces the driving voltage of the device, improves the current efficiency, maintains thermal stabilityin the preparation and use processes of the device, and prolongs the service life of the device.
Owner:NINGBO LUMILAN NEW MATERIAL CO LTD
Silicon dioxide-based metal sulfide composite material as well as preparation method and application thereof
ActiveCN112490018AGood electrochemical cycle performanceReduce corrosionHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceOxide
The invention discloses a silicon dioxide-based metal sulfide composite material prepared by a two-step hydrothermal method, concretely, growing a nano flower-like structure of manganese disulfide andcobalt disulfide on the outer surface of template agent silicon dioxide by adopting a two-step hydrothermal method, and etching the silicon dioxide by hydroxyl through vulcanization reaction. Thus, part of silicon dioxide is released from hydrolysis of sulfide ions, a certain hole is etched in an internal silicon dioxide template, ion migration is facilitated, and the layered nano metal sulfide composite material based on silicon dioxide can be prepared. The preparation method comprises the following steps: 1, preparing a composite metal oxide precursor; and 2, preparing the silicon dioxide-based metal sulfide composite material. When the material is used as a supercapacitor electrode material, the material is charged / discharged within the range of 0-0.55 V, and when the discharge currentdensity is 1 A / g, the specific capacitance is 1150-1160 F / g. The material has excellent material stability and excellent ion transmission capability.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Preparation method for cerium oxide nanorod array/graphene composite material and application of cerium oxide nanorod array/graphene composite material in photocathode protection
ActiveCN111519228AEvenly dispersedCurl suppressionMaterial nanotechnologyElectrolytic inorganic material coatingElectron holePhotocathode
The invention relates to a preparation method for a cerium oxide nanorod array / graphene composite material and application of the cerium oxide nanorod array / graphene composite material in photocathodeprotection. The preparation method comprises the following steps that a conductive substrate is taken as a substrate, and a CeO2 nanorod array is grown on the substrate through an electro-depositionmethod; and then the CeO2 nanorod array is activated by using a SnCl2 ethanol solution, tin ion is deposited on the CeO2 nanorod array, the CeO2 nanorod array is immersed into a GO solution, GO is reduced into rGO through the tin ion, and meanwhile, electrostatic adsorption is carried out on the tin ion and rGO, so that the CeO2 nanorod array is connected to a graphene upper sheet, and the ceriumoxide nanorod array / graphene composite material is constructed. The cerium oxide nanorod array structure can not only improve the light absorption rate, but also can effectively promote the electron-hole separation and the directional transmission efficiency of carriers under illumination, the physical barrier of a flaky material is combined with the anticorrosion of a traditional photocathode, the synergistic effect between the flaky material and the traditional photocathode is exerted, and the anticorrosion performance is further improved.
Owner:江苏纳欧新材料有限公司
Corona-resistant polyimide based composite material and preparation method thereof
The invention provides a corona-resistant polyimide based composite material and a preparation method thereof. The preparation method provided by the invention comprises the steps that an anionic two-dimensional layered material and an organic intercalation agent are subjected to heating reaction in a solvent; then, the mixture and polyimide polymerization monomers are subjected to in-situ polymerization reaction in the solvent; a mixed solution I is obtained; inorganic nanoparticles and the polyimide polymerization monomers are subjected to in-situ polymerization reaction in the solvent; a mixed solution II is obtained; then, the solution I and the solution II are mixed; heat treatment is performed to obtain the polyimide based composite material. The composite material prepared by the preparation method provided by the invention can improve the polyimide corona-resistant performance and also obtains higher mechanical property and excellent temperature resistant performance.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Amino-modified grapheme / graphene MoSe2 / bismaleimide composite material and preparation method thereof
The invention relates to an amino-modified grapheme / graphene MoSe2 / bismaleimide composite material and a preparation method thereof, and belongs to the technical field of advanced composite materials. Firstly, the surface of the graphene oxide is modified by using a silane coupling agent KH-550 to carry an active amino group, and then is mixed with the Na2MoO4 2H2O and the selenium powder dissolved in N2H4 H2O, and the amino-modified graphene / graphene molybdenum diselenide nano composite particle is prepared by a one-pot hydrothermal method. And finally, the prepared nano composite particles are mixed with the diphenylmethane-type bismaleimide and the diallyl bisphenol A in a certain proportion to prepare the composite material. The prepared composite material has good interface bonding strength, excellent mechanical property and tribological performance.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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