483 results about "Carbon nanomaterials" patented technology

The invention provides a high-lightning-stroke-resistant toughness continuous carbon fiber reinforced composite material, which is obtained by paving a plurality of layers of continuous carbon fiber resin prepregs and intercalation layers to obtain a preform and curing the preform through a conventional composite material molding process, each resin-based prepreg layer used in a preset layer number range close to the anti-lightning side is a first resin prepreg layer, the other resin-based prepreg layers are second resin prepreg layers, an intercalation is arranged between every two adjacent second resin prepreg layers, and the intercalation material is a micron conductive material with the surface density of 2-20 g / m < 2 >; wherein the resin in each resin-based prepreg layer is added with 2-10wt% of carbon nanomaterial, and the compressive strength of the rest resin-based prepreg layers after impact is higher than 250MPa. The composite material provided by the invention realizes integrated compounding of high lightning stroke resistance and high impact toughness. The anti-lightning performance of the composite material can meet the requirements of no internal layering and low fiber damage on the surface, and meanwhile, the compression strength CAI after impact can reach more than 200MPa.

The invention discloses a cement-based structure supercapacitor and a wall energy storage system, and relates to the technical field of energy storage. Wherein the cement-based structure super capacitor comprises a capacitor positive electrode, a capacitor negative electrode and a cement-based solid electrolyte; the capacitor positive electrode and the capacitor negative electrode are made of carbon nanomaterials; the cement-based solid electrolyte comprises cement, a conductive additive and a transition metal oxide; the cement-based solid electrolyte is arranged between the capacitor positive electrode and the capacitor negative electrode. According to the technical scheme, the energy storage performance of the super capacitor with the cement-based structure can be improved.

The invention provides a nitrogen-doped biomass-based fluorescent carbon quantum dot, a preparation method and application, and relates to the technical field of carbon nanomaterials, the method comprises the following steps: mixing a biomass material and deionized water under an ultrasonic condition, adding a nitrogen source, and carrying out ultrasonic dispersion to obtain a uniformly dispersed to-be-reacted solution; reacting the to-be-reacted solution at a preset temperature for a preset time to obtain a mixed product solution; and filtering and dialyzing the mixed product solution to obtain the nitrogen-doped biomass-based fluorescent carbon quantum dot solution. The nitrogen-doped biomass-based fluorescent carbon quantum dot prepared by the method shows a stable fluorescent effect and good water solubility, the free radical clearance rate can reach 90% or above, and the antibacterial rate can reach 99% or above. The method can be used in the fields of drug sustained release, bioimaging and the like.

The invention relates to a preparation method and application of polysaccharide-based fluorescent carbon quantum dots with adjustable emission wavelength, and belongs to the technical field of preparation of fluorescent carbon nanomaterials. Polysaccharide is respectively mixed with different nitrogen dopants o-phenylenediamine, m-phenylenediamine and p-phenylenediamine, then the mixture is subjected to a hydrothermal reaction to respectively prepare blue, green and yellow green fluorescent carbon quantum dots, and then the blue, green and yellow green fluorescent carbon quantum dots are applied to nitrite detection. The carbon quantum dots with different emission wavelengths and different colors are obtained by adjusting the types of the nitrogen doping agents, the problems that the emission wavelengths of the carbon quantum dots cannot be adjusted and the range is narrow are solved, and reference is provided for subsequent design and opening of the generator-based multicolor fluorescent carbon quantum dots. Meanwhile, the biological polysaccharide is used as a raw material, deionized water is used as a solvent, the whole technological process is easy to operate and low in cost, and the method has far-reaching significance on further high-value utilization of biomass resources and promotion of sustainable utilization of the biomass resources.

The invention discloses a preparation method of 3, 4-dihydroxy benzaldehyde / gelatin carbon nanomaterial-based adhesive hydrogel, and belongs to the technical field of hydrogel. According to the invention, 3, 4-dihydroxy benzaldehyde and gelatin are adopted as carbon sources, the synthesized nano-filler has amphiphilic surface characteristics, uniform dispersion of the nano-filler in a hydrogel network can be promoted, meanwhile, a mechanically firm and deformable nano-composite structure is established by utilizing the interaction of multivalent interfaces, and 3, 4-dihydroxy benzaldehyde and gelatin are added into the hydrogel network. The surface chemical property of the 1, 4-dihydroxybenzaldehyde / gelatin nano-filler not only can relieve phase separation, but also can promote synergistic energy dissipation through hydrogen bond reconstruction under the action of stress. According to the design, the inherent flexibility of the hydrogel is reserved, meanwhile, the electromechanical response capacity of the hydrogel is greatly improved, and the obtained hydrogel material has the dual functions of structural supporting and active sensing media and can be seamlessly integrated with biological tissue without sacrificing the fidelity of interface signals.

The invention provides a preparation method of a small-diameter single-walled carbon nanotube, and relates to the technical field of carbon nanomaterials. The preparation method comprises the following steps: mixing a nanoscale catalyst, high-purity graphite powder and a liquid carbon source binder, and sequentially molding and sintering to obtain a mixed graphite rod; the nanoscale catalyst contains metal elements, and the metal elements are transition metal elements and / or aluminum elements; and carrying out plasma catalytic pyrolysis by taking the mixed graphite rod as an anode and a pure graphite rod as a cathode to obtain the small-diameter single-wall carbon nanotube. The preparation method provided by the invention is high in yield (the mass ratio of the single-walled carbon nanotubes in a crude product is high), and the single-walled carbon nanotubes with smaller tube diameters can be prepared. Results of the embodiment show that when the preparation method provided by the invention is adopted to prepare the single-walled carbon nanotube, the mass ratio of the single-walled carbon nanotube in a crude product can reach 79%, and the diameter of the single-walled carbon nanotube can be as low as 1.2 nm.

The invention belongs to the field of carbon nanomaterials, and provides a method for preparing a carbon quantum dot material doped with elements such as silicon and aluminum by oxidative depolymerization and stripping of coal gangue. Comprising the steps of screening and matching of coal gangue, oxidative depolymerization stripping, centrifugal dialysis membrane filtration and modification, drying and the like, raw materials and all the steps are specifically set, and the particle size or fluorescence performance of fluorescent carbon dots can be specifically selected and set according to selective oxidative depolymerization stripping conditions. The main particle size of the prepared multi-inorganic-element doped carbon quantum dot material is kept within the range of 1.5-2.0 nm, the structure is stable, the optical performance also meets the requirements, and the material can be further modified and is expected to be applied to the fields of photovoltaic equipment, biological imaging, photocatalytic degradation of organic pollutants or sensing and the like.

The invention discloses a thiazole-linked covalent organic framework carbon nanomaterial compound as well as a preparation method and application thereof. The preparation method comprises the following steps: adding 4, 4 ', 4'-tetramethyl-4, 4 ', 4'-tetramethyl-4, 4 '-tetramethyl-4, 4'-tetramethyl-4, 4 '- The preparation method comprises the following steps: dissolving 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) triphenylamine, 4, 4', 4 ''-(1, 3, 5-triazine-2, 4, 6-triyl) tribenzaldehyde, elemental sulfur and an amino-modified carbon nanomaterial in a solvent, reacting under the action of a catalyst, and purifying after the reaction to obtain the compound. The compound has high chemical stability, high crystallinity and excellent conductivity, and shows excellent rate capability and long cycle stability in a lithium ion battery. The invention provides a new thought for design and preparation of a high-performance energy storage electrode material.

The invention relates to a positive pole piece which comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, and the positive active material layer comprises a positive active material, sulfide solid electrolyte and a core-shell flame retardant, the core-shell type flame retardant comprises a core, a first shell layer coating the core, a second shell layer coating the first shell layer and a third shell layer coating the second shell layer, the core comprises an organic flame retardant, the first shell layer comprises a thermal response polymer, the melting point of the thermal response polymer is 125-275 DEG C, the second shell layer comprises an inorganic flame retardant, and the third shell layer comprises an inorganic flame retardant. And the third shell layer comprises a conductive polymer and a carbon nanomaterial. The positive pole piece provided by the invention has improved safety, and also has enhanced compression resistance and conductivity.

The invention provides conductive carbon paste as well as a preparation method and application thereof, and belongs to the technical field of conductive materials. The carbon black, the graphene and the carbon nanotubes are utilized to form a self-supported three-dimensional conductive network, so that the graphene / carbon nanotube composite material has excellent conductivity. In addition, both the graphene and the carbon nanotubes have excellent mechanical properties, flexibility and chemical stability, so that the mechanical stability of a conductive layer after the conductive carbon paste is cured can be improved. And the high-temperature-resistant binder can improve the stability of the conductive layer after the conductive carbon paste is cured. The flexibility reinforcing agent can improve the flexibility of the conductive carbon paste. The silane coupling agent can play a bridge role between the carbon material and the high-temperature-resistant binder, so that the interface affinity between the carbon nanomaterial and the high-temperature-resistant binder is enhanced; the silane coupling agent effectively inhibits agglomeration of the graphene and the carbon nanotubes in a chemical adsorption or physical coating mode. The result of the embodiment shows that the conductive layer formed by curing the conductive carbon paste provided by the invention has excellent conductive stability and mechanical stability.

The invention belongs to the field of carbon nanomaterials, and relates to a cobalt molybdenum / magnesium aluminum metal catalyst, a preparation method and application thereof, and a preparation method of a carbon nanotube. The preparation method of the cobalt molybdenum / magnesium aluminum metal catalyst comprises the following steps: S1, carrying out chelation reaction on metal salt and small molecular organic acid in a solvent, adjusting the pH value of the obtained chelation product to 3-7.5, and mixing the chelation product with a modifier to form gel; and S2, roasting the gel to obtain the cobalt molybdenum / magnesium aluminum metal catalyst. The preparation method is characterized in that in the preparation process of the cobalt-molybdenum / magnesium-aluminum metal catalyst, small-molecular organic acid is used as a chelating agent, and a specific modifier is used as an accelerant and a stabilizer, so that the prepared cobalt-molybdenum / magnesium-aluminum metal oxide has good structural stability and catalytic performance, and when the cobalt-molybdenum / magnesium-aluminum metal oxide is used as a carbon nanotube synthesis catalyst, the catalytic performance of the catalyst is greatly improved. Not only can the carbon yield be improved, but also the few-walled carbon nanotube with small tube diameter and high length-diameter ratio can be obtained.

The invention belongs to the technical field of carbon nanomaterials, and particularly relates to a highly graphitized carbon tube grid of a scaffold-like structure and a preparation method and application of the highly graphitized carbon tube grid. The preparation method comprises the following steps: taking aluminum oxide with interconnected pore channels inside as a template, and obtaining a three-dimensional interconnected nickel nanorod grid film through an electro-deposition method; by utilizing the catalytic graphitization property of metal nickel and regulating and controlling parameters of acetylene when the acetylene is decomposed on the surface of the metal nickel, the problem that three-dimensional highly-graphitized carbon with controllable morphology and size cannot be synthesized due to nickel deformation caused by a catalytic mechanism is solved, and the highly-graphitized carbon tube grid with a scaffold-like structure is obtained; and the crystallinity of the carbon tube grid film is effectively improved at a relatively low temperature. The preparation process is simple, feasible and environment-friendly, and equipment is low in cost and common. A smooth ion transport channel provided by the vertical carbon tube array and a rapid electron conduction network provided by the highly graphitized interconnected carbon tube structure are expected to be used in the fields of alternating current filtering, high power output and the like.

The invention belongs to the technical field of electrocatalysts, and discloses a method for preparing a heterogeneous monomolecular electrocatalyst by using water-soluble metalloporphyrin / phthalocyanine and a carbon carrier and application of the heterogeneous monomolecular electrocatalyst. The method comprises the following steps: 1) dissolving water-soluble metalloporphyrin / phthalocyanine in water to obtain a water-soluble metalloporphyrin / phthalocyanine solution; 2) soaking the electrode coated with the nanoscale carbon material in a water-soluble metalloporphyrin / phthalocyanine solution; or uniformly mixing the carbon nanomaterial organic solvent dispersion liquid with a water-soluble metalloporphyrin / phthalocyanine solution to obtain a composite catalyst; and dispersing the composite catalyst in an organic solvent, uniformly mixing with a binder solution, coating an electrode with the mixture, and drying to obtain the heterogeneous monomolecular electrocatalyst. The method disclosed by the invention is simple, catalyst molecules can be completely dispersed and adsorbed on a nanoscale carbon material in a single molecule form, and active sites are improved; the prepared monomolecular electrocatalyst is used for electrocatalysis of carbon dioxide reduction reaction, and high product selectivity and stability of carbon dioxide reduction can be realized.

The invention provides an amphiphilic nitrogen-doped coal-based carbon dot and a preparation method thereof, and belongs to the technical field of carbon nanomaterials. The method comprises the following steps: performing oxidation-depolymerization treatment on coal by using a mixed solution of formic acid and hydrogen peroxide to obtain coal-based carbon dots; uniformly dispersing the coal-based carbon dots and polyamine in a solvent 1, and then carrying out hydrothermal reaction 1 to obtain nitrogen-doped coal-based carbon dots; dissolving the nitrogen-doped coal-based carbon dots in a solvent 2, and then adding halogenated alkane for reaction 2 to obtain an intermediate product; the intermediate product is dissolved in a solvent 3, then a catalyst and a sulfonating agent are added for a reaction 3, and the amphiphilic nitrogen-doped coal-based carbon dots are obtained. The coal-based carbon dots have controllable hydrophilic and hydrophobic structures, excellent surface activity and interfacial activity, excellent dispersion stability and ultralow interfacial tension in a high-salinity oil-water system, and can meet the actual application requirements in the fields of oil-water interface regulation and control, solid-liquid interface wetting regulation and control and the like.

The invention relates to the technical field of glucose sensors, in particular to a direct electron transfer type sensor electrode mediated by a carbon nanomaterial, a preparation method of the direct electron transfer type sensor electrode and a glucose biosensor with the sensor electrode. The sensor electrode comprises: a base electrode having an electrode working area; the nanometer conducting layer is arranged on the electrode working area, and the nanometer conducting layer comprises a carbon nanometer material; and the analyte detection layer is arranged on the nano conductive layer, and the analyte detection layer comprises glucose dehydrogenase.

The invention discloses a preparation method of bamboo cellulose derived carbon nanomaterial-based super-strong and super-tough hydrogel, and belongs to the technical field of hydrogel materials. The preparation method of the bamboo cellulose-derived carbon nanomaterial-based super-strong and super-tough hydrogel comprises the following steps: mixing phthalic anhydride functionalized bamboo fibers, organic carboxylic acid, a nitrogen source and water, and carrying out hydrothermal reaction to obtain a bamboo cellulose-derived carbon nanomaterial solution; the method comprises the following steps: mixing a bamboo cellulose derived carbon nanomaterial solution, a hydrogel monomer, a cross-linking agent, a photoinitiator and water, and carrying out a free radical polymerization reaction under an illumination condition to obtain the bamboo cellulose derived carbon nanomaterial-based super-strong and super-tough hydrogel. The hydrogel prepared by the invention has excellent breaking strength, superior breaking energy and toughness and good adhesive force and electrical conductivity, and the problem that the existing hydrogel with excellent performance needs to adopt a complex preparation method is solved.

The invention belongs to a sodium-ion battery negative electrode material, and particularly relates to a sodium-ion battery negative electrode material as well as a preparation method and application thereof. The invention provides a sodium ion battery negative electrode material, which adopts a mode of coating a carbon nanomaterial on the surface of hard carbon to prepare an artificial SEI film so as to solve the reaction between groups on the surface of the hard carbon and an electrolyte. The adopted polymer has a high pi-pi conjugated polymer chain, belongs to a conductive polymer and is good in electronic conductivity; the electrochemical stability is high, and degradation is almost avoided in the battery circulation process; the structure is compact, the integrity of the hard carbon closed pore structure can be maintained from the perspective of physical limitation, and the cycle stability of the hard carbon material can be maintained. The prepared negative electrode material has higher first efficiency, larger specific capacity and excellent cycle performance, and meanwhile, the process steps are simple and efficient.

A nuclear fuel cell cladding that includes a zirconium-carbon covetic material. The zirconium-carbon covetic material has a carbon component associated with the surface of zirconium particles. The amount of carbon present in the zirconium-carbon covetic material is in a range of greater than 0.1 wt % to about 25 wt % of the zirconium-carbon covetic material. The carbon component may include carbon nanotubes, carbon nanomaterials, graphene, or graphene nanoplatelets. The carbon component may be uniformly distributed within the zirconium matrix. The zirconium-carbon covetic material may be formed from a zirconium alloy. The zirconium-carbon covetic material may be configured for use in various types of nuclear reactors. The synthesis of the cladding involves a process of plasma-enhanced chemical vapor deposition. The resulting nuclear fuel cell cladding offers improved performance and reliability for nuclear reactor applications.

The invention relates to a flexible spacing bar for hollow glass and a preparation method thereof, and the spacing bar comprises 100 parts of silicone rubber, 30-50 parts of a molecular sieve, 40-60 parts of a filler, 10-20 parts of modified polytetrafluoroethylene, 3-7 parts of a microsphere foaming agent, 1-2 parts of a silane coupling agent and 3-5 parts of a vulcanizing agent. The modified polytetrafluoroethylene is a polytetrafluoroethylene / carbon nanotube composite material or a polytetrafluoroethylene / graphene composite material, and the filler is carbon nanomaterial composite polytetrafluoroethylene aerogel and silicon dioxide aerogel. According to the flexible spacing bar disclosed by the invention, carbon nanomaterial composite polytetrafluoroethylene aerogel and silicon dioxide aerogel with a porous structure are added into a silicone rubber base material to serve as fillers, so that the heat insulation performance and the physical and mechanical properties of the flexible spacing bar are improved, and the mechanical properties of the spacing bar are enhanced by adding modified polytetrafluoroethylene; and the spacing bars are correspondingly deformed along with the expansion and contraction movement of the hollow glass, so that the stress generated by thermal expansion difference can be effectively buffered and dissipated.

The invention belongs to the technical field of preparation of structure and function integrated composite materials, and particularly discloses a polyimide precursor, a carbon nanotube resistance stabilizer and a preparation method and application of the polyimide precursor and the carbon nanotube resistance stabilizer. The invention provides a carbon nanotube resistance stabilizer prepared from a polyimide precursor (namely phenolic hydroxyl group-containing polyamide acid), and the resistance stabilizer has good water solubility and is environment-friendly; meanwhile, the carbon nano tube film or coating treated by the resistance stabilizer has the characteristics of high temperature resistance and water resistance and can be matched with the co-curing condition of high-temperature curing resin prepreg, and the cured carbon nano material has good resistance stability and has an excellent interface with a composite material. The carbon nanotube resistance stabilizer provided by the invention has a good application prospect and a relatively high economic value.

The invention provides a Fe-Fe3C-coated rGO carbon nanoelectrode material as well as a preparation method and application thereof, and belongs to the technical field of electrode materials. Aiming at the problem that an existing electrode material is difficult to be used as a CDI electrode material for removing heavy metals, the CDI electrode material is prepared by utilizing the characteristic that multivalent metal iron ions can be subjected to cross-linking reaction with a sodium alginate solution, and the preparation method comprises the following steps: obtaining a graphene oxide dispersion liquid; under a water bath condition, adding sodium alginate into the graphene oxide dispersion liquid, dropwise adding the obtained gel liquid into a ferric salt solution, stirring, and freeze-drying to obtain aerogel microspheres; and carrying out high-temperature carbonization on the aerogel microspheres to obtain the Fe-Fe3C-coated rGO carbon nanomaterial. When the material is used as a CDI electrode material, aggregation of an iron compound on the surface of graphene can be effectively reduced, the specific capacitance, the conductivity and the cycling stability of the electrode material are improved, and a good Cr (VI) removal effect is achieved.

The present invention provides a homocysteine ​​electrochemical sensor, and its preparation method and application. The preparation method of the homocysteine ​​electrochemical sensor of the present invention comprises the following steps: adding a dispersion containing carbon nanomaterials to the surface of a glassy carbon electrode, baking and drying, to obtain a carbon nanomaterial-modified electrode; then placing the carbon nanomaterial-modified electrode in a gold salt aqueous solution, and using an electroplating method to deposit nanogold on the surface of the carbon nanomaterial-modified electrode, to obtain a homocysteine ​​electrochemical sensor; the high conductivity of gold nanoparticles is of great significance for improving the electrocatalytic performance of the composite material for homocysteine. The homocysteine ​​electrochemical sensor prepared by the present application has low cost, low detection limit, and good stability. In addition, the spiked recovery rate of homocysteine ​​in serum samples is good, which provides potential application value for the reliable determination of homocysteine ​​in biological systems and the study of homocysteine-related diseases.

The invention belongs to the technical field of asphalt mixtures, and particularly relates to conductive aggregate and a preparation method thereof, an asphalt mixture and a preparation method and application of the asphalt mixture. The conductive aggregate comprises an aggregate matrix and a conductive film, wherein the conductive film is coated on the surface of the aggregate matrix; the conductive thin film comprises an adhesive and a carbon nanomaterial which forms a three-dimensional conductive network on the surface of the aggregate matrix; the thickness of the conductive film is 20 [mu] m-70 [mu] m. The conductive thin film is coated on the surface of the aggregate matrix, and the thickness of the conductive thin film is only 20-70 [mu] m, so that the particle size of the conductive aggregate is not greatly different from that of the aggregate collective, and the asphalt mixture obtained by mixing the conductive aggregate with the asphalt matrix can improve the conductivity of the conductive aggregate on the premise of keeping the physical and chemical properties of the asphalt matrix. And the phenomenon that the carbon nanomaterial is easily agglomerated when being directly mixed with the asphalt matrix as a conductive phase is effectively prevented.

The invention relates to the technical field of heat exchange, and particularly discloses a gallium-based alloy composite working medium and a preparation method thereof.The gallium-based alloy composite working medium comprises a main heat transfer fluid and nano particles dispersed in the main heat transfer fluid, and the main heat transfer fluid is liquid gallium-based alloy; the nano particle comprises a metal core, a non-metal shell layer coated outside the metal core and a carbon nano material layer coated outside the non-metal shell layer. The carbon nanomaterial is modified on the surface of the non-metal shell layer, the dispersion condition of nanoparticles in liquid metal is effectively improved, and meanwhile, the carbon nanomaterial can effectively mask silicon hydroxyl on the surface of the non-metal shell layer and prevent self-polymerization tendency between the non-metal shell layers by modifying the surface of the non-metal shell layer.

The invention relates to the technical field of carbon nanomaterials, and discloses a water-based high-dispersion carbon nanotube-graphene composite conductive liquid and a low-temperature curing process thereof, the process comprises pre-dispersion, fine dispersion, conductive liquid preparation, curing treatment, low-temperature curing and post-treatment, and by optimizing the composite dispersion process and a surface modification method, the conductive liquid is prepared. The agglomeration phenomenon of nano materials is inhibited, uniform and stable dispersion of the carbon nanotubes and graphene in a high-water-based medium is realized, and the storage stability and applicability of the conductive liquid are improved; by designing a multi-stage low-temperature cross-linking mechanism, the curing temperature is reduced, the process time is shortened, and damage of high temperature to a heat-sensitive base material is avoided; through the synergistic effect of the graphene and the carbon nanotubes and the application of an interface enhancement technology, a continuous and stable three-dimensional conductive path is formed in a low-temperature film forming process, and the conductivity, the mechanical strength and the environmental stability of the conductive film are improved.

The invention relates to the technical field of metal oxide coating electrodes, in particular to a carbon nano hybrid material loaded metal oxide coating electrode and a preparation method of the carbon nano hybrid material loaded metal oxide coating electrode. And dissolving metal ions by using the metal ions as a solvent, uniformly coating the metal ions on the surface of titanium or titanium alloy subjected to certain surface treatment, and carrying out heat treatment to obtain a target electrode. The preparation method is simple in process and convenient to operate, the prepared electrode can effectively prevent a corrosion medium from permeating into the coating due to the existence of the nano hybrid material, the service life of the electrode is greatly prolonged, and the electrocatalytic activity of the electrode can be improved by optimizing electron transmission.

The invention relates to the field of luminescent carbon nanomaterials, in particular to a water-soluble carbon dot-based afterglow luminescent material based on a multi-carboxyl carbon source and a preparation method of the water-soluble carbon dot-based afterglow luminescent material. The preparation method comprises the following steps: step 1, uniformly mixing a Y (CH3CO2) 3 solution, oleic acid and 1-octadecene according to a formula ratio; 2, heating to 120-160 DEG C, reacting for 20-50 minutes, then cooling to 40-60 DEG C, preserving heat, and adding a NaOH methanol solution and an NH4F methanol solution; step 3, adding organic acid, wherein the organic acid contains at least two carboxyl groups; and 4, heating to 90-120 DEG C, vacuumizing, then heating to 280-320 DEG C, reacting for 1-3 hours in a nitrogen atmosphere, naturally cooling to room temperature, and carrying out post-treatment to obtain the water-soluble CDs (at) NaYF4 composite material. According to the preparation method, the water-soluble carbon dot-based afterglow luminescent material based on the multi-carboxyl carbon source, which is stable in structure and good in dispersity, can be prepared, and the water-soluble carbon dot-based afterglow luminescent material has the advantages of long service life and wide application range.

The invention relates to the technical field of bridge and tunnel paving materials, in particular to an anti-rutting epoxy asphalt modifier and a using method thereof.The anti-rutting epoxy asphalt modifier is prepared from, by mass, 13-27 parts of a component A and 12.1-27 parts of a component B; the component A comprises the following components in parts by mass: 10-20 parts of epoxy resin; 2-4 parts of a reactive diluent; 1-3 parts of a composite bifunctional compatilizer; the component B comprises the following components in parts by mass: 10-20 parts of a curing agent; 2-4 parts of an accelerant; 0.1-3 parts of a functionalized carbon nanomaterial; a carbon nanomaterial is subjected to amino silane functional modification, so that the adaptability among epoxy, asphalt and aggregate is improved, the carbon nanomaterial and the asphalt are premixed to form an asphalt-carbon nanoskeleton structure, and the compatibility between the epoxy and the asphalt is improved by utilizing a composite bifunctional compatilizer; finally, the epoxy, the asphalt and the aggregate are tightly bonded through physical blending and chemical bonding, so that the anti-rutting performance is greatly improved.

The invention relates to the technical field of carbon nanomaterials, particularly discloses a molybdenum-nitrogen co-doped carbon quantum dot, and also discloses application of the molybdenum-nitrogen co-doped carbon quantum dot. The molybdenum-nitrogen co-doped carbon quantum dot provided by the invention is synthesized by taking L-arginine, a molybdenum source and 1-pyrenecarboxaldehyde as precursors through a one-step hydrothermal method. The molybdenum-nitrogen co-doped carbon quantum dot provided by the invention has obvious advantages in detection of Cr2O7 < 2-> and luteolin, and can also be applied to fluorescent ink.

The invention relates to the fields of green energy materials, electrochemical sensing detection, food and medicine, in particular to a preparation method, a product and application of a waste coffee residue derived in-situ monatomic iron loaded nitrogen-doped carbon nanomaterial. The preparation method of the waste coffee residue derived in-situ monatomic iron loaded nitrogen-doped carbon nanomaterial comprises the following steps: carbonizing coffee residues in an argon atmosphere to obtain the waste coffee residue derived in-situ monatomic iron loaded nitrogen-doped carbon nanomaterial, the carbonization specifically comprises the step of heating to 800-1000 DEG C at the rate of 5 DEG C / min and carbonizing for 2 hours. The waste coffee residue derived in-situ monatomic iron loaded nitrogen-doped carbon nanomaterial prepared by the method has selectivity and high efficiency on chlorogenic acid detection, and the detection limit of chlorogenic acid is as low as 66.67 nmol / L.