231 results about "Polyactive" patented technology

The invention relates to the technical field of preparation of epoxy insulating materials, in particular to an epoxy resin material constructed by a multistage molecular chain cross-linked network and a preparation method, and the epoxy resin material realizes synergistic improvement of insulation and mechanical properties. Epoxy resin monomers with different rigid and flexible group contents and different chain lengths under the same chain structure are combined according to a certain proportion and are mixed into a homogeneous-phase resin matrix at a high temperature, and then the homogeneous-phase resin matrix and an anhydride curing agent are subjected to cross-linking curing at the high temperature to prepare the epoxy insulating material. The rigidity and flexibility of an epoxy cross-linked network are regulated and controlled by utilizing the multi-rigid group and multi-epoxy group of a short-chain resin monomer in a resin matrix and the multi-active hydroxyl and high-flexibility ether bond content of a long-chain resin monomer, and a charge barrier is constructed. Finally, the epoxy resin material with high mechanical property and high electrical insulation property is prepared, and the insulation property and the mechanical property are synergistically improved.

The invention belongs to the field of environmental protection and pollutant treatment, and relates to a method for enriching and detecting microplastics in a surface water body. The lignin is grafted with amido and carboxyl through two-step reaction, firstly, carbon quantum dot active site powder with positive charges on the surface is prepared, the carbon quantum dot active site powder is cross-linked with the modified montmorillonite, and the carbon quantum dot active site microporous adsorbent is prepared, so that the prepared adsorbent has multiple surface functional groups and multiple and uniform active sites, and the adsorption efficiency is improved. The adsorption speed of the micro-plastics in the water body can be increased, the adsorption capacity of the micro-plastics in the water body is improved, and rapid enrichment and separation of the micro-plastics in the water body are realized. Based on the enrichment and separation method, the invention further provides a method for measuring the microplastics in the water environment. According to the invention, rapid filtration, enrichment and detection of micro-plastics in water are realized, the operation is simple and convenient, and the accuracy is high.

The invention discloses an MWW molecular sieve and a preparation method thereof, and the preparation method comprises the following steps: (a) mixing an alkali source, water, an aluminum source, a template agent and a silicon source to form a mixture A; (b) adding nano cellulose into the mixture A to form a mixture B, and pretreating, crystallizing and drying the mixture B to obtain the MWW molecular sieve. The preparation method disclosed by the invention is simple and convenient, easy to industrialize and wide in application prospect, and the MWW molecular sieve with the single-layer structure is prepared. The MWW molecular sieve with a single-layer structure can expose more active sites, promotes diffusion and mass transfer, shows excellent performance in many reaction processes, and particularly shows high activity and stability in a reaction with macromolecules as a substrate.

The inorganic particle according to the present invention is composed of aggregation of crystalline and amorphous small particles and has a spherical and smooth surface. The spherical appearance, low crystallinity and narrow particle size distribution of inorganic particle are more advantageous in reducing scratch defects in the CMP process. In addition, since the small particles on the surface of the inorganic particle provide more active sites, the inorganic particle has an excellent removal rate, so it is advantageous as a next-generation CMP abrasive.

The invention relates to the field of impregnated bond paper, in particular to a preparation method and application of low-formaldehyde high-toughness high-temperature-resistant amino resin, the prepared amino resin, organic silicon modified polyvinyl alcohol and composite nano silicon dioxide are used as raw materials to prepare the impregnated bond paper, and the impregnated bond paper which is green, environmentally friendly, good in water resistance, high in flame retardance and good in wear resistance is obtained; the preparation method comprises the following steps: grafting an epoxy polymer containing double bonds and 3-glycerol propyl trimethoxy silane with polyvinyl alcohol to obtain organic silicon modified polyvinyl alcohol; the preparation method comprises the following steps: carrying out modification treatment on nano silicon dioxide by using vinyl polydimethylsiloxane to obtain hydrophobic nano silicon dioxide, and carrying out free radical polymerization on vinyl modified nano silicon dioxide, dimethylaminoethyl methacrylate and a double-bond-containing epoxy polymer serving as raw materials under the action of an initiator azodiisobutyronitrile, so as to obtain the high-temperature-resistant epoxy resin. The composite nano silicon dioxide with multiple active sites is obtained.

The invention provides an environment-friendly self-repairing single-component waterborne polyurethane waterproof coating and a preparation method thereof. The environment-friendly self-repairing single-component waterborne polyurethane waterproof coating is prepared from the following components in percentage by mass: 35 to 45 percent of waterborne hyperbranched polyurethane resin, 10 to 15 percent of titanium dioxide, 15 to 20 percent of barium sulfate, 5 to 10 percent of modified quartz powder, 0.1 to 1 percent of a thickening agent, 0.2 to 0.3 percent of a sterilizing agent, 3.5 to 6.5 percent of an auxiliary agent and the balance of water. The waterproof coating contains certain fluorine atoms, so that a paint film has relatively stable long-acting hydrophobic performance after being dried, and the paint film can be kept clean and self-cleaning for a long time; in addition, the modified quartz powder has the effect of enhancing the mechanical property and stability of the paint film; and meanwhile, the paint film forms a compact network structure in the drying process, so that the paint film has relatively good flexibility and relatively high hardness. In addition, the components contain more active groups, so that the paint film can be self-repaired.

The invention relates to an selective dry film for a circuit board and a preparation method of the selective dry film. The selective dry film for the circuit board comprises the following components: acrylic resin, an active monomer, modified boron nitride, hyperbranched polyether, an auxiliary agent and a solvent, wherein the modified boron nitride is obtained by reacting a silane coupling agent, trifluoromethacrylic acid and glycidyl methacrylate with boron nitride. The hyperbranched polyether is a polymer of glycerol and glycidyl. Materials such as acrylic resin are adopted as main components and compounded with modified boron nitride, so that compatibility and stability among the components are improved, more active groups are introduced, a firmer cross-linked structure is obtained, the strength of the dry film is further improved, and improvement of properties such as adhesive force and precision is facilitated; and the method has important significance on development and popularization of selective dry film products.

The invention belongs to the field of water-based metal ion battery electrode materials, and particularly relates to a quinoneazine organic electrode material with multiple active sites and a preparation method and application of the quinoneazine organic electrode material. The preparation method comprises the following steps: synthesizing dihydroxy phenazine in a nitrogen atmosphere, fully grinding the dihydroxy phenazine and an o-phenylenediamine derivative, sintering in a tubular furnace, cooling and washing to obtain an intermediate; and oxidizing the intermediate under an acidic condition to obtain a product. A plurality of carbon-nitrogen double bonds and carbon-oxygen double bonds exist in the molecular structure of the quinoneazine compound, and redox active sites are rich and are uniformly dispersed. The quinoneazine compound realizes high specific capacity, high material utilization rate, excellent rate capability and cycling stability; meanwhile, according to the quinoneazine compound, the solubility of the compound is reduced through a method of expanding molecules with conjugated structures, and the problem of battery stability caused by the fact that an organic electrode material is easily dissolved in an electrolyte is solved. And the water-based zinc ion battery with the advantages of high capacity, good cycling stability, high energy storage density and the like is constructed.

The invention belongs to the technical field of energy storage materials, and particularly relates to a phase change energy storage material and a preparation method thereof.The phase change energy storage material is prepared from 8-12 parts of phase change wax, 10-15 parts of ZnAl-LDH, 6-9 parts of SiC-CuS and 8 parts of polyethylene glycol dimethyl ether; according to the invention, the double-metal hydroxide and the phase-change wax are combined, interlayer water molecules and ionic bonds of the double-metal hydroxide can realize reversible phase change, the phase-change wax can be supported to reduce high-temperature flowing, the phase-change wax makes up for insufficient latent heat and improves energy storage capacity, and the combination of the double-metal hydroxide and the phase-change wax widens the phase-change temperature range and enhances cycle stability; in addition, Si-C loaded CuS nanosheets are introduced, energy can be transmitted under illumination or heat energy to assist storage, the smaller the size of the nanosheets is, the larger the specific surface area is, more active sites can be provided, the heat conduction efficiency is improved, complementation of all advantages of the material is achieved through a simple method, and good comprehensive performance is achieved.

The invention relates to a surface modification method of a Co-CeO2 abrasive material based on coordination of a silane coupling agent and a surfactant. According to the method, in the modification of the chemically mechanical polished cerium dioxide abrasive, different types of surfactants are added by utilizing a method of combining a silane coupling agent and the surfactants, and more active sites are introduced on the surface of cerium dioxide through the silane coupling agent, so that the surface of the cerium dioxide is modified. And meanwhile, the surfactant is ionized to generate anions, so that the electrostatic repulsion among the nanoparticles is enhanced, the dispersity of the cerium dioxide abrasive is enhanced, and the polishing rate and the polishing quality are further improved. When the obtained material is used as an abrasive material, the removal rate is increased to # imgabs0 #, and compared with a traditional abrasive material, the removal rate is increased by about 40%.

The invention relates to an iron and phosphorus co-doped Co3S4 hollow polyhedral electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalysis and new energy materials. The electrocatalyst material provided by the invention adopts a hydrothermal-high temperature phosphating combined preparation method, and the synthesis steps comprise: preparing an iron-doped Co3S4 hollow polyhedral precursor in one step by adopting a hydrothermal reaction, and then carrying out high temperature phosphating to obtain the iron and phosphorus co-doped Co3S4 hollow polyhedral point catalyst material. The prepared electrocatalyst material has the characteristics of anion and cation co-doping and hollow porosity, and the oxygen evolution reaction activity of the electrocatalyst is improved through the synergistic effect of multiple active components such as Fe atoms, P atoms and Co3S4 nanoparticles; the preparation method is low in cost, and the obtained material is high in catalytic activity and good in stability and has wide application prospects in the fields of electrolyzed water, metal-air batteries and the like.

The invention discloses a preparation method of a bentonite-containing composite material and an application of the bentonite-containing composite material in desertification control, and relates to the technical field of composite material preparation, the preparation method comprises the following specific steps: step 1, raw material preparation and pretreatment: selecting a high-purity bentonite mineral source as a basic material, and preparing a raw material; compared with the prior art, the preparation method has the advantages that bentonite, chitosan and other natural high-molecular polymers are synergistically compounded, and plant fibers are added for modification, so that multiple remarkable advantages are brought, firstly, chitosan has numerous active functional groups and can interact with the surface of bentonite and water molecules through hydrogen bonds, electrostatic interaction and the like, and the surface of bentonite can be modified; the plant fibers contain rich cellulose, the interlaced structure of the plant fibers can be embedded into a composite system, long-term effectiveness of the material in the desert environment is guaranteed when the material encounters external force, and moreover, chitosan can be converted into organic nutrients to nourish soil and continuously improve soil fertility after being degraded, so that the soil fertility is improved; the durability of the soil improvement effect is greatly improved.

The present invention discloses a catalyst for hydrogenating carbon dioxide to ethanol, its preparation method and application. The catalyst is composed of an active metal, a promoter and a carrier. The active metal is Cu, Co and Ga. The promoter is a combination of any one of Mn or K and Na. The carrier is a carbon carrier. Calculated by the weight ratio of the catalyst being 100%, the contents of each component are as follows: Cu 10-20%, Co 10-20%, Ga 5-10%, Na 1-3%, Mn or K 1-3%, and the balance is the carrier. The introduction of the carbon carrier in the catalyst of the present invention is beneficial to the dispersion of the active metal. At the same time, the electronic effect of the carbon carrier creates more active site interfaces of the active components. The structural effect and the electronic effect of the carbon carrier promoting metal dispersion play a synergistic role, improving the selectivity of the target product. The preparation method of the catalyst of the present invention is simple, the preparation process is short, and it is environmentally friendly and easy to scale up.

The invention discloses Fe3O4-V2O5 ultramicro composite foam nano-enzyme for serum creatinine detection as well as a preparation method and application of the Fe3O4-V2O5 ultramicro composite foam nano-enzyme, and belongs to the technical field of serum creatinine detection and nano-enzyme preparation. Comprising the following steps: (1) dissolving vanadium dichloride, ferric trichloride hexahydrate and cane sugar in an ethanol solution, then adding a phytic acid aqueous solution, and drying to obtain a first solid; and (2) placing the first solid in a Joule thermal device graphite sample table, and carrying out rapid Joule thermal shock in an air atmosphere to obtain the Fe3O4-V2O5 ultramicro composite foam nano-enzyme. The sucrose is used as a template agent, so that the formation of an ultramicro composite foam structure is promoted, the specific surface area of the material is remarkably increased, and more active sites are provided. The synergistic effect between Fe3O4 and V2O5 improves the catalytic activity of the active site. The porous structure effectively prevents agglomeration of nano-enzyme, and provides more channels for rapid recognition and reaction of serum creatinine.

The invention discloses a doped perovskite catalyst with a noble metal exposed on the surface, a preparation method and application thereof, belongs to the technical field of catalytic materials, and particularly relates to application in catalytic removal of volatile organic compounds. The method comprises the following steps: performing composite molding on rare earth elements / alkaline earth metals, transition metals and noble metals by adopting a sol-gel method, and performing strong acid surface etching and other operations. The surface of the catalyst is provided with a noble metal nanocluster or noble metal nanoparticle structure, so that the surface area is increased, more active sites can be provided, the adsorption of reactant molecules is enhanced, and the conversion rate and selectivity of a catalytic reaction are further improved. Based on the structure and performance advantages, the catalyst disclosed by the invention can be used for efficiently removing volatile organic compounds, can effectively reduce the initial temperature of the catalytic oxidation reaction of the volatile organic compounds, and has a wide application prospect in treating various industrial processes needing high-temperature and efficient catalysis.

The invention discloses a preparation method of a bifunctional heterojunction catalyst for AEM electrolyzed water. The method comprises the following steps: step 1, mixing multi-walled carbon nanotubes, deionized water, absolute ethyl alcohol and inorganic acid; step 2, putting the mixed solution in the step 1 into an ultrasonic machine to form a porous structure and more active adsorption sites; step 3, carrying out freeze drying treatment on the mixed solution treated in the step 2; step 4, mixing the dried multi-walled carbon nanotubes with acetylacetone salt, and uniformly grinding the mixed powder; and step 5, putting the powder obtained in the step 4 into a tubular furnace, and carrying out heat treatment in the atmosphere of H2 / Ar to obtain the PtFeCoNiMoZr / ZrO heterojunction catalyst. The catalyst has a remarkable catalytic effect on HER and OER reactions, and meanwhile, stable electrolysis which stably runs for 200 hours in an AEM electrolytic cell under the current density of 1200 mA / cm < 2 > is successfully realized.

The invention is applicable to the technical field of organic photocatalysts, and provides a novel pillararene polymer material as well as a preparation method and application thereof. The metal-free organic catalyst polymer material TpAP [n] with semiconductor characteristics is designed and prepared by introducing supramolecular macrocyclic pillar aromatic hydrocarbon as a construction unit, the metal-free organic catalyst polymer material TpAP [n] is synthesized through a Schiff base condensation reaction, the unique interlayer ordered stacking limits the recombination of current carriers, an effective electron-hole transmission path is formed, and the metal-free organic catalyst polymer material TpAP [n] can be used for preparing a semiconductor material. More active sites are provided, and efficient contact between reactants and a catalytic center is facilitated. Experimental results show that the material can remarkably increase the generation rate of H2O2 under the illumination condition and shows excellent photocatalytic performance, the preparation process is environmentally friendly and conforms to the green chemistry principle, and a support and a theoretical basis are provided for design and preparation of subsequent series of metal-free organic catalysts.

The invention belongs to the technical field of electrocatalytic nitrate reduction catalysts, and particularly relates to a graded porous hollow carbon fiber catalyst with synergistic monatomic iron and ferric oxide clusters as well as a preparation method and application of the graded porous hollow carbon fiber catalyst. The preparation method specifically comprises the following steps: stirring polyacrylonitrile and polymethyl methacrylate in an organic solvent to obtain a spinning precursor solution; the preparation method comprises the following steps: taking ferrous sulfate heptahydrate and 1, 10-phenanthroline as ligands, and stirring in an organic solvent to obtain a metal organic ligand; the preparation method comprises the following steps: stirring a spinning precursor solution and a metal organic ligand, obtaining a metal precursor-loaded composite fiber through an electrostatic spinning technology, and then carrying out pre-oxidation and high-temperature pyrolysis to obtain the composite fiber. The prepared carbon fiber has good conductivity and a unique hollow hierarchical porous structure, transmission of reactants is greatly promoted while more active sites are exposed, the carbon fiber serves as a monatomic synergistic cluster catalyst carrier, rapid transmission of electrons is facilitated, and the electro-catalysis efficiency is effectively improved.

The present invention belongs to the technical field of artificial boards, and relates to a curing agent for a formaldehyde-free substrate, which is composed of 5-10wt% of methyl ethyl ketone oxime, 20-30wt% of polyacrylamide, and the balance of water by weight percentage. A preparation method and application of the curing agent for the formaldehyde-free substrate are also disclosed. The curing agent for the formaldehyde-free substrate disclosed by the present invention has good sealing property, can reduce the viscosity of isocyanate, extend the application period, and improve the fluidity and dispersibility of spray glue. By sealing the free isocyanate group, the pre-curing during drying is reduced, and the isocyanate is unsealed during high-temperature hot pressing, and the isocyanate is cured quickly, the hot pressing efficiency is improved, the hot pressing time is shortened, and the water loss is reduced; more active isocyanate groups are retained in the adhesive, the bonding performance and water resistance are improved, the amount of isocyanate glue applied is reduced, and the reaction with water is reduced. The present invention can also effectively improve the production capacity of the formaldehyde-free floor substrate and reduce the cost; by increasing the moisture content, the expansion or contraction degree caused by the change of humidity in the external environment is reduced, and the dimensional stability is improved.

The invention relates to the technical field of oxygen reduction catalysts, in particular to a Fe-Sn diatomic site catalyst and a preparation method thereof.The Fe-Sn diatomic site catalyst comprises a nitrogen-containing carbon matrix, Fe atoms and Sn atoms, the Fe atoms and the Sn atoms are loaded on the nitrogen-containing carbon matrix, and the nitrogen-containing carbon matrix is formed by polymerizing and carbonizing dopamine hydrochloride. The Fe-Sn double-atom site catalyst provided by the invention prevents metal atom agglomeration, has more active sites, and shows excellent catalytic activity and stability in ORR reaction.

The invention discloses preparation and application of an amido-functionalized polyionic liquid catalyst, vinyl imidazole hydrobromide and N-(4-vinyl) benzyl diethylamine are used as monomers, N, N '-methylene bisacrylamide is used as a cross-linking agent, and the amido-functionalized polyionic liquid catalyst is prepared through a free radical copolymerization method. The imidazole / amido functionalized cross-linked PILs with multiple active sites are prepared by one-step synthesis through a hydrothermal polymerization method. The catalyst has catalytic active sites of amido, imidazolyl and Br, so that the catalyst can efficiently catalyze the cycloaddition reaction of CO2 and epoxide at 80 DEG C and normal pressure in the absence of a solvent and a co-catalyst.

The invention relates to the technical field of crossing of material chemistry and water electrolysis oxygen evolution, in particular to a method for preparing a yolk shell structure high-entropy phosphide FeCoNiCrMn-P catalyst through a low-temperature phosphating method. The method comprises the following steps: dissolving a plurality of nitrates in isopropanol and a glycerin solvent to react to obtain high-entropy glycerate; carrying out hydrothermal reaction on the reacted high-entropy glycerate to generate a high-entropy hydroxide; the high-entropy hydroxide and a phosphorus source are subjected to a low-temperature phosphating reaction to generate the high-entropy phosphide catalyst. According to the invention, the reactant FeCoNiCrMn-P with a graded egg yolk shell structure not only exposes more active sites and provides abundant mass transfer channels, but also provides a uniform environment for heterogeneous catalysis, so that OER is promoted. In addition, the shell layer can also play a role of a protective layer, prevents the active components from deforming and dissolving in the catalytic process, and enhances the stability of the active components. When the current density is 10 mA cm <-2 >, the FeCoNiCrMn-P2 has the best OER performance, and the overpotential of the FeCoNiCrMn-P2 is 329 mV, so that the FeCoNiCrMn-P2 has high practical application value.

The invention belongs to the field of air electrode materials, and discloses a self-supporting multifunctional catalytic fabric electrode and preparation and application thereof. According to the invention, a metal organic framework is grown in situ on an acid-treated and modified graphite felt substrate through a simple room-temperature self-assembly method, so that the semi-coated nano-particle metal with uniform adsorption and multiple active sites is obtained. Dicyandiamide (DCD) is used as a carbon source, and an M-Nx-C type carbon nanotube (NCNTs) electrocatalyst is grown in situ on a three-dimensional flexible metal organic framework conductive substrate through a chemical vapor deposition (CVD) method. The synthesized GF / Co-NCNTs show excellent three-function catalytic activity and excellent stability, and ORR, OER, HER and stability tests of the GF / Co-NCNTs are not inferior to those of commercial Pt / C and RuO2. The method can be applied to the aspects of zinc-air batteries, flexible wearable equipment, pressure sensors and self-driven water electrolysis hydrogen production.

The invention discloses a high edge protection type cathode electrophoretic coating and a preparation method thereof. Epoxy resin and a cyclic hydroxyl compound are subjected to a chain extension reaction, and a cyclic substituent group is introduced; adding amine chain extension reactants containing multiple active hydrogen into the chain extension product to form a local branched structure; the preparation method comprises the following steps: carrying out amination modification by adopting an aliphatic micromolecular amine mixture to obtain modified epoxy resin with a short-chain comb-type branched structure; sequentially adding a curing agent, a reinforcing material and a neutralizer, and continuously stirring to form a stable resin emulsion; and mixing the color paste, the resin emulsion and pure water according to a mass ratio to obtain the coating. By optimally designing the resin structure, on one hand, coating film flowing in the curing process is inhibited, sufficient film thickness and protection force of the edge are ensured, and on the other hand, when the edge corrosion resistance is improved, the mechanical performance, chemical performance and appearance quality of a coating in a non-edge area are prevented from being sacrificed, the overall performance is cooperatively improved, and the multi-working-condition service requirement of an automobile is met.

The invention belongs to the technical field of perovskite materials, and particularly relates to application of triazole formamide, a perovskite precursor solution and a preparation method and application of the perovskite precursor solution, triazole formamide serves as an additive to be added into perovskite, and triazole formamide is 1, 2, 4 triazole-3-formamide. According to the method, the homogenization of the large-area film is realized and the defects in the perovskite polycrystalline film are effectively passivated in the nucleation and crystallization process in the process of preparing the large-area perovskite polycrystalline film by using the small-molecule triazole formamide as the multi-active-site additive regulation and control solution method; therefore, the photoelectric conversion efficiency and the stability of the perovskite photovoltaic miniature module are improved.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method and application of a hydrotalcite-based metal catalyst. According to the hydrotalcite-based metal catalyst, nickel-aluminum binary hydrotalcite NiaAlb-LDH is taken as a carrier, and Mg or two active metals of Cu and Mg are loaded; the ratio of a to b is (0.5-2): 1. The preparation method comprises the following steps: firstly, NiaAlb binary hydrotalcite is prepared by adopting a coprecipitation method, and the ratio of the amount of Ni to the amount of Al is expressed as Ni: Alb; and then loading the active components Mg or Cu and Mg onto the NiaAlb binary hydrotalcite by an impregnation method. The catalyst prepared by the invention has a relatively large specific surface area, and provides more active sites for active components; the catalyst is good in stability, long in service life and high in activity; the catalyst is used for the synthetic reaction of N-methylmorpholine for the first time, the yield of the product N-methylmorpholine is high, and the conversion rate of the raw material morpholine is high.

The invention discloses a supported polymeric ionic liquid based on [TMGH] Br dication and a preparation method and application thereof. According to the method, five starting raw materials which are easy to obtain are used, the supported polymeric ionic liquid based on [TMGH] Br dication is prepared through a one-pot method, and cyclic carbonate can be efficiently synthesized under the conditions of the temperature of 60 DEG C, normal pressure, no solvent and no cocatalyst. The polymeric ionic liquid is simple and efficient in synthesis method, has multiple active centers and high ion density, shows excellent catalytic activity and has good cycle performance.

In one aspect, compositions or formulations for unwanted plant control are described herein. In some embodiments, a composition described herein comprises an active ingredient component, a surfactant component, and a solvent component. In some embodiments, a composition comprises Fenoxaprop-p-ethyl, and at least one of Carfentrazone-ethyl and / or Triclopyr-butoxyethyl ester.

This invention belongs to the field of SERS detection technology and relates to the application of an Ag / Bi4O5Br2 / Ni-Fe double hydroxide composite SERS substrate in the detection of CV in wastewater. First, a Bi4O5Br2 / Ni-Fe double hydroxide is prepared, and silver nanoparticles are loaded onto its surface using a liquid-phase chemical reduction method. This material combines the LSPR effect of silver nanoparticles with the interfacial coupling and multiple active sites of the Ni-Fe double hydroxide, enabling the regulation of interfacial charge transfer and enhancing molecular adsorption. Utilizing the excellent adsorption and enrichment properties of Bi4O5Br2, a highly efficient charge transport system is synergistically constructed from multiple components, improving the SERS chemical enhancement effect and amplifying the CV Raman signal. This invention overcomes the shortcomings of weak signals and insufficient stability of single substrates, achieving sensitive detection of trace CV in water. The substrate preparation process is simple, environmentally friendly, and highly practical, showing broad application prospects in the field of trace CV analysis in aquatic environments.

The present invention discloses a flame retardant and anti-melting drip nylon material and its preparation method and application. The flame retardant and anti-melting drip nylon material provided by the present invention is obtained by polymerization reaction of POSS flame retardant and anti-melting drip salt, phosphorus flame retardant salt and nylon salt. The present invention introduces a phosphorus and silicon flame retardant and anti-melting drip system containing rich active groups into the main chain of nylon macromolecules by polymerization means, and the flame retardant and anti-melting drip component is connected to the nylon matrix through chemical bonds, which solves the migration problem of small molecular components; the silicon-based flame retardant and anti-melting drip component containing multiple active amino groups can form branched nylon macromolecules, which can solve the reduction of nylon viscosity caused by the introduction of flame retardant monomers and improve the anti-melting drip performance of nylon materials.