39results about How to "Avoid uneven load" patented technology

The present application belongs to the technical field of high-performance nylon fiber materials, and particularly relates to a preparation method of antibacterial modified high-performance nylon fiber. The preparation method comprises the following steps: S1, a triazine ring-containing dicarboxylic acid is prepared by taking cyanuric chloride, 4-amino-2,2,6,6-tetramethylpiperidine and p-hydroxybenzoic acid as raw materials, triphenylphosphine oxide is subjected to nitration treatment and reduction treatment to obtain tris(3-aminophenyl)phosphine oxide, and the triazine ring-containing dicarboxylic acid and the tris(3-aminophenyl)phosphine oxide are mixed for a synthesis reaction to obtain modified hyperbranched polyamide; S2, polyamide masterbatch, modified hyperbranched polyamide, antibacterial material, zinc stearate and antioxidant are melt blended, extruded and granulated to obtain modified nylon chip; and S3, the modified nylon chip is subjected to melt spinning to obtain antibacterial modified high-performance nylon fiber. The present application not only ensures that the fiber has good antibacterial performance, but also effectively improves the breaking strength and flame retardant performance.

The invention provides a fiber multilayer composite air filtering material and a preparation method thereof. The fiber multilayer composite air filtering material comprises a fiber base material, a metal catalyst is loaded on the fiber base material, the surface of the fiber base material is covered with a nanofiber membrane, the fiber base material is composed of alkali-treated bamboo fibers and polymer fibers, and the nanofiber membrane contains an antibacterial agent and a silane coupling agent. The fiber multilayer composite air filtering material has the advantages of high catalyst loading capacity, excellent filtering efficiency, good mechanical strength and toughness and the like, the raw materials are wide in source, the process is simple and environment-friendly, and a new way is provided for development of multifunctional air filtering materials. The invention also provides a preparation method of the fiber multilayer composite air filtering material.

A catalyst for coupling pyridine to prepare 2,2-bipyridine and a preparation method thereof, relates to the technical field of catalyst preparation. The catalyst takes nickel oxide as an active component, enhances the basicity of the catalyst surface by introducing an auxiliary element, loads the active component on alumina by a deposition precipitation method, and is prepared by kneading and extruding into a strip. The method is simple in preparation and low in cost. The obtained catalyst can make the conversion rate of pyridine reach 14.98% and above under low temperature reaction conditions of 110 DEG C, the selectivity of 2,2-bipyridine is as high as 80% and above, and the catalyst has good catalytic activity and application prospect.

This invention discloses an antifouling membrane made of lanthanum-loaded carbon nanomaterials suitable for phosphorus recovery in wastewater, its preparation method, and its applications. The invention involves loading lanthanum carbonate octahydrate onto the surface of multi-walled carbon nanotubes (MWCNTs) to form lanthanum-loaded carbon nanomaterials (La@MWCNTs), which are then deposited onto the surface of a polyethersulfone-based membrane using vacuum filtration to form a self-supporting membrane. The prepared lanthanum-loaded carbon nanomaterial antifouling membrane possesses both phosphorus removal and recovery capabilities, exhibiting high efficiency in phosphorus removal from water. This facilitates phosphorus elution and recovery, effectively solving the problems of lanthanum-loaded carbon nanomaterial aggregation and recovery, and effectively avoiding the risk of lanthanum-based adsorbent leakage during phosphorus removal. Furthermore, the lanthanum-loaded carbon nanomaterial antifouling membrane operates within a low-pressure range, exhibiting low energy consumption and effectively mitigating membrane fouling caused by humic acid. It shows promising application prospects in wastewater phosphorus recovery and eutrophication control.

The application provides a preparation method of a double-metal MOF material functionalized transistor sensor for BPA detection, and the material uses ZIF-8 as a carbon source, and a carbon material (Ce@ZIF8 / C) with rich mesoporous structures and good dispersed metal active sites embedded with Ce and Zn double metals is successfully prepared by using a direct pyrolysis method. The Ce@ZIF8 / C material prepared by the application can be applied to the functionalization of a gate electrode of an SGGT sensor, and an electrochemical sensor for real-time monitoring of an organic pollutant BPA in water can be successfully constructed. The electrochemical sensor constructed by the material synthesized by the application has good detection performance on BPA.

The present application relates to the technical field of high polymer material flame-retardant modification, and particularly relates to a COF hierarchical modification APP-based core-shell flame-retardant smoke suppressant, a preparation method and application thereof. The flame-retardant smoke suppressant takes APP as a flame-retardant core layer; takes PVP as a soft template agent, and assists in situ growth of melamine-p-phenylenedimethylene formaldehyde (COF) on the surface of APP to adsorb combustible volatile components in the initial pyrolysis stage, provide a gas source, and act as a Fe 3+ coordination skeleton; takes tannic acid as a coordination agent and a carbon source, and constructs a multi-level core-shell structure with Fe 3+ coordination. The present application realizes integration of flame-retardant and smoke suppression functions through hierarchical modification. When the flame-retardant agent is applied to polyurethane, it can significantly reduce the heat release rate, smoke release rate and toxic gas generation amount, and simultaneously improve the compatibility with the matrix, effectively overcoming the defects of poor compatibility and insufficient flame-retardant and smoke suppression performance of traditional APP flame-retardant agents. The present application has simple preparation process and controllable conditions, and is suitable for industrial production.

The application discloses a method for preparing polyethylene wax by using a carborane bridged rare earth metallocene catalyst, and simultaneously preparing a carborane bridged indenyl rare earth metallocene compound as a main catalyst, loading the prepared main catalyst and a cocatalyst on a magnetic mesoporous Fe3O4@Al2O3 core-shell nanoparticle carrier to obtain a supported rare earth metallocene catalyst; the main catalyst of the application is a carborane bridged indenyl rare earth metallocene compound with a structure shown in formula (I), wherein a bridging group adopts a closed carborane (closed-1,2-dicarbadodecaborane), and the cage-like three-dimensional structure has super-high thermal stability and chemical inertness and does not degrade or rearrange in a high-temperature molten state of 130-200 DEG C. Large-volume substituents such as methyl, tert-butyl, phenyl or 4-tert-butylphenyl are introduced on the indene ring to provide sufficient steric protection and further inhibit chain transfer and side reactions at high temperatures.

The application discloses a DSP lock-free parallel clustering method based on adaptive division and boundary summary, comprising the following steps: obtaining original spatial point cloud data, determining a global calculation region and putting the global calculation region into a to-be-processed queue as a root node, and calculating the region potential energy corresponding to each region in the to-be-processed queue; when the regions in the to-be-processed queue are subjected to bisection cutting, final partitions are obtained; according to the final partitions, the original spatial point cloud data is traversed to obtain an extended data set and an index list of core attribution points; the index list of the extended data set is subjected to density clustering to obtain local clusters and a preliminary global cluster label vector; according to the triangle inequality, cluster summaries are screened and a union-find set is processed to obtain a union-find set result; and the union-find set result is mapped and converted into a continuous integer label to obtain a final clustering result. The application can realize a strictly consistent DBSCAN clustering effect on a multi-core DSP platform, and can meet the requirements of real-time performance, low communication overhead, scalability and high engineering reliability.

The invention relates to the technical field of aerogel microsphere preparation, in particular to a method for preparing composite nanocellulose aerogel microspheres based on electrostatic field auxiliary regulation and control. Comprising the following steps: forming uniform liquid drops from a silane modified nano cellulose suspension through an electrostatic spraying device provided with an annular electrode group and a real-time monitoring feedback system; the liquid drops are induced by an electrostatic field in a pre-cooling area to be initially set and then subjected to liquid nitrogen cryogenic treatment, gradient freeze drying is conducted, and aerogel microspheres are obtained; and finally, carrying out surface modification on the aerogel microspheres, and loading nano microspheres under the assistance of an alternating electric field to obtain the composite nano cellulose aerogel microspheres. Through the synergistic effect of the multi-stage electric field, accurate regulation and control on the whole process of microsphere forming, internal structure construction and functional compounding are realized, so that the composite nanocellulose aerogel microspheres with narrow particle size distribution, uniform size and adjustable functions are prepared, and the composite nanocellulose aerogel microspheres have wide application prospects in the fields of adsorption, catalysis, biological medicine and the like.

The present application relates to a kind of based on carbonized wood natural structure dopamine electrochemical sensor and its preparation method and application, the working electrode of the electrochemical sensor is modified with carbonized wood-ZnO nanowire-ZIF-8.The electrochemical sensor of the present application uses carbonized wood as substrate, after cutting carbonized wood whole piece, using conductive carbon paste is pasted on working electrode, while ensuring conductivity, also retain the three-dimensional structure of nanomaterial not be destroyed, guarantee the performance of sensor, with good application prospect.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for preparing a sponge iron-based ferrous silicate reducing agent for wastewater treatment. Sponge iron is activated in a dilute phosphoric acid solution to obtain activated sponge iron; the activated sponge iron is washed and then immersed in a ferrous solution, removed and washed, and then matured in a sodium silicate solution to obtain matured sponge iron; the matured sponge iron is washed and freeze-dried to obtain the sponge iron-based ferrous silicate reducing agent. The sponge iron-based ferrous silicate reducing agent prepared by this invention is easily separated from the effluent and has excellent and long-lasting reducing performance. It solves the problems of high reducing agent dosage, high salinity of the treated effluent, generation of large amounts of iron sludge, and the need for continuous addition of reducing agent in traditional reduction processes. Furthermore, the preparation method is simple, requiring no complex equipment or catalysts, and the raw material, sponge iron, is inexpensive and widely available, resulting in low production costs and suitability for large-scale preparation and engineering applications.

This invention discloses a method for preparing and applying chitosan-encapsulated CoCe layered double hydroxide CoCe-LDH. This material can achieve rapid and efficient degradation of roxarsone and removal of the resulting inorganic arsenic. In this material, LDH is encapsulated by chitosan, resulting in a sheet-like material. Chitosan can disperse active sites and adsorb and enrich PMS, while LDH can transfer PMS ions into the anion layer through anion exchange, thereby increasing the active sites. After coupling with the material, PMS is specifically converted to... 1 O2 accelerates the degradation rate.

The present application discloses a kind of heavy die test press machines, including body frame, main oil cylinder, body frame is made of lower crossbeam, column and upper crossbeam.Key features include slider, lifting cylinder, motor, friction stopper and moving platform.Slider includes rotary slider, pressurized slider and side slider, wherein pressurized slider is installed in frame by guide rail, connected with main oil cylinder.Side slider moves up and down through guide assembly and guide rail, and double-side lifting cylinder drives its action.Rotary slider connects two side sliders through rotary shaft, and motor is installed on side slider, rotary motion is realized through driving gear and rotary gear.Moving platform is installed on lower crossbeam, used for installing lower die.Through innovative double-side synchronous drive and gear set driving, the test press machine improves system stability, rotary load capacity and test function, and provides significant technical advantage for large, heavy die test requirements.

This invention discloses a piezoelectric self-renewing gradient ceramic catalytic membrane and its preparation method, belonging to the field of porous ceramic technology. The method includes the preparation of a porous piezoelectric ceramic substrate, LDH transition layer modification, and catalyst electrophoretic deposition. The catalyst electrophoretic deposition method involves dispersing the catalyst in a solvent, adjusting the suspension to make the catalyst particle surface positively charged, obtaining a catalyst suspension; using a ceramic substrate modified with a positively charged transition layer as the cathode and a graphite rod as the anode, immersing both electrodes in the catalyst suspension, controlling the distance between the two electrodes to 1.4-1.6 cm, connecting a constant voltage DC power supply of 20-40V, and depositing for 5-15 minutes. After deposition, the sample is removed and subjected to post-processing and polarization treatment to obtain the catalytic ceramic membrane product. This invention utilizes fluid pressure fluctuations to excite the piezoelectric effect, achieving in-situ mechanical exfoliation and self-renewal of catalytically activated and surface-deactivated catalysts, significantly improving catalytic efficiency and long-term stability.

The invention discloses a preparation method of an ultra-high-sensitivity gold star nanoparticle / MOF-808 SERS (Surface Enhanced Raman Scattering) substrate, which comprises the following steps: firstly, synthesizing sea urchin-shaped gold star nanoparticles (GNS) with a multi-tip structure in the presence of an amphiphilic block copolymer by a seed mediated growth method; then, by taking zirconium oxychloride octahydrate and 1, 3, 5-benzene tricarboxylic acid as precursors, performing hydrothermal reaction to synthesize an MOF-808 metal organic framework carrier; finally, GNS and MOF-808 are combined in a self-assembly mode, and the solid SERS substrate is obtained through ultrasonic loading, centrifugation, freeze drying and grinding. The method is simple and convenient in preparation process and low in cost, and the prepared substrate is high in uniformity, good in signal reproducibility and high in sensitivity and shows excellent structural stability. Wherein the multi-tip structure of the sea urchin-shaped aventuris effectively enhances a local electromagnetic field, and the SERS detection sensitivity is remarkably improved.

The invention provides a preparation method of a catalyst. The preparation method comprises the following steps: obtaining a molybdenum source and a cobalt source; the method comprises the following steps: adding a molybdenum source and a cobalt source into a preset deionized water solution, and carrying out ultrasonic treatment; a carrier is added into the solution, ultrasonic treatment is continuously carried out, a solution containing solid particles is obtained, and the carrier is any one of silicon dioxide, aluminum oxide and porous carbon; carrying out centrifugal treatment on the solution containing the solid particles to obtain the solid particles; drying the solid particles in a freeze dryer to obtain a catalyst precursor; and putting the catalyst precursor into a high-temperature and high-pressure reaction kettle, and adding sulfur and hydrogen to realize reaction in the heating process, thereby obtaining the single-layer molybdenum disulfide catalyst with uniformly dispersed Co. The invention further provides a single-layer molybdenum disulfide catalyst and application. According to the method, the single-layer molybdenum disulfide catalyst in which Co is uniformly dispersed can be efficiently obtained, and the problems that the synthesis time of a CoMoS catalyst is long, Co is not uniformly dispersed on MoS2, and the Co conversion reaction catalyzing effect is not ideal are solved.

The application discloses a balsa wood / poly-p-phenylenediamine / polyvinyl alcohol solar energy evaporator and a preparation method thereof. NaClO2 and CH3COOH remaining in delignified balsa wood are used as oxidants to drive in-situ polymerization of p-phenylenediamine in a delignified balsa wood matrix, and the reuse of NaClO2 and CH3COOH is realized. The balsa wood / poly-p-phenylenediamine / polyvinyl alcohol evaporator prepared by the application has the characteristics of wide spectrum absorption, fast water transport, effective heat confinement and effective reduction of water evaporation enthalpy, and exhibits excellent solar energy driven interface water evaporation performance.

The invention belongs to the technical field of electrochemical energy storage, and relates to a high-performance flexible self-repairing zinc ion battery and a preparation method thereof. A zinc-vanadium-based compound is used as a positive active matter, a carbon substrate is used as a carrier, and composite hydrogel containing a self-repairing monomer is used as electrolyte; the flexible self-repairing zinc ion battery is prepared through an integrated process of carbon substrate activation, active matter thermal loading with a solvent, self-repairing hydrogel preparation and battery assembly. Wherein active sites are introduced into the carbon substrate through dilute acid-hydrogen peroxide mixed solution etching or plasma treatment, an active matter is accurately loaded on the carbon substrate by adopting a solvothermal method, the hydrogel takes PVA / gelatin as a matrix and DAAM as a self-repairing cross-linking agent, CMC-Na / CS is supplemented to enhance flexibility and Li < + > is doped to improve ion conduction, and finally collaborative optimization of battery capacity, self-repairing and flexibility is realized. Active matter loading and carbon substrate modification are synergistically regulated and controlled, and the limitation that active matter loading and substrate modification are carried out step by step in traditional preparation is broken through.

The invention provides an amidoximation hydrothermal carbon / zirconium phosphate composite adsorbent as well as a preparation method and application thereof. The adsorbent is prepared by taking biomass such as coffee residue or tea residue as a carbon source, compounding the carbon source with a zirconium source compound and a phosphoric acid solution, carrying out hydrothermal reaction and then carrying out amidoximation modification. According to the material, strong interface bonding of hydrothermal carbon and zirconium phosphate lamellas is achieved through stable P-C bonds, and the material has an expanded interlayer spacing structure. The prepared uranium-containing wastewater adsorbent has excellent adsorption performance when being used for treating uranium-containing wastewater, has high adsorption capacity on uranyl ions, has a removal rate of 98% or more, and still keeps high selectivity and stability in a wide pH range and in a multi-ion coexistence environment. The invention provides an environment-friendly and low-cost novel adsorption material for efficient treatment of radioactive uranium-containing wastewater.

The application discloses Eu@MOF-808-His composite film and a preparation method and tryptophan enantiomer detection application thereof. The method is characterized in that the MOF-808-His chiral material is prepared through a post-synthetic ligand exchange method, Eu ions are loaded on the MOF-808-His chiral material to obtain Eu@MOF-808-His luminescent powder, and finally, the Eu@MOF-808-His luminescent powder is compounded with PDMS to prepare the composite film. 3+ The application is characterized in that a fixed concentration-time gradient fluorescence quenching detection method is first created, the time-dependent amplification of chiral resolution of dynamic quenching is utilized, the Stern-Volmer quenching constant ratio of L / D-tryptophan in a 30% ethanol-water system can reach 1.9364, and the Stern-Volmer quenching constant ratio is significantly higher than that of existing powder-state materials. The composite film has a simple preparation process, and the excellent crystal structure stability and good micro-dispersed morphology of the composite film are verified through XRD and SEM characterization. The material has a rapid fluorescence response, the time-dependent amplification of chiral resolution of dynamic quenching is utilized, the Stem-Volmer quenching constant ratio of L / D-tryptophan in a 3% ethanol-water system can reach 1.9364, and the Stern-Volmer quencing constant ratio is significantly higher than that of existing powder-state materials. The composite film solves the problems of poor dispersibility and difficult recycling of traditional powder materials, and can realize rapid and accurate detection of tryptophan enantiomers.

The invention relates to the technical field of air purification, in particular to a preparation method and application of a potassium permanganate alumina ball air purification filter material, the preparation method comprises the following steps: S1, cleaning and drying an activated alumina ball to obtain a pretreated alumina ball; s2, dissolving potassium permanganate in deionized water, and adding a stabilizer to prepare a potassium permanganate solution; s3, adding the pretreated alumina balls into a potassium permanganate solution to obtain impregnated alumina balls; s4, taking out the impregnated alumina balls, and drying to obtain dried alumina balls; s5, soaking the dried alumina balls in an organic acid solution, taking out the alumina balls, leaching the alumina balls, and drying the alumina balls to obtain treated alumina balls; and S6, putting the treated aluminum oxide balls into a sealed container, and aging to obtain the aluminum oxide balls. The potassium permanganate alumina ball air purification filter material obtained by the preparation method has the advantages of uniform potassium permanganate loading, firm combination, good stability and high purification efficiency.

The invention relates to the technical field of wastewater treatment, in particular to a CuMn2O4 / gamma-Al2O3 catalyst as well as a preparation method and application thereof. The CuMn2O4 / gamma-Al2O3 catalyst is composed of a carrier gamma-Al2O3 pellet and an active component CuMn2O4, and the carrier gamma-Al2O3 pellet is The CuMn2O4 / gamma-Al2O3 catalyst disclosed by the invention is applied to an ozone-hydrogen peroxide synergistic catalytic oxidation system for treating organic wastewater, and the activation capability of the surface to ozone and hydrogen peroxide is optimized by utilizing oxygen vacancies between Cu and Mn sites and cation migration characteristics, so that the degradation efficiency of organic matters is improved. The system not only solves the problems of low heterogeneous catalytic oxidation efficiency and poor catalyst stability in the prior art, but also remarkably improves the COD removal efficiency, keeps good cycle stability, and realizes efficient degradation of high-concentration organic pesticide wastewater and reutilization of the catalyst.

The application provides an iron-carbon filler and a preparation method and application thereof. The preparation raw material of the iron-carbon filler comprises 30-60 parts of iron-carbon catalytic raw material, 25-50 parts of river channel sediment and 5-15 parts of tailing waste rock. The iron coarse concentrate and the tailing waste rock are obtained by treating iron tailings; the iron-carbon catalytic raw material is obtained by pyrolyzing a mixture comprising straw and the iron coarse concentrate, in the pyrolyzing process, the organic carbon in the straw is reduced to active carbon, the high-valence metal in the iron coarse concentrate is reduced to zero-valence metal, the active carbon can uniformly load the reduced metal, and the iron-carbon catalytic raw material is obtained. The iron-carbon filler is prepared from the iron-carbon catalytic raw material, the tailing waste rock and the river channel sediment, the cost is reduced, the river channel sediment, the iron tailings and the straw resources are developed with high value, the waste is changed into treasure, and the iron-carbon filler is applied in the water treatment field, waste is treated by waste, and economic benefits are created.

The invention relates to hydrogel as well as a preparation method and application thereof, and belongs to the technical field of biological hydrogel materials. The hydrogel comprises a prednisolone sodium phosphate hydrogel P-Gel skeleton and gold nanoparticles PCAu, wherein the gold nanoparticles PCAu are uniformly loaded on the P-Gel skeleton and are coated by procyanidine. According to the preparation method, a three-dimensional cross-linked network skeleton of PSP hydrogel P-Gel is self-assembled and constructed by utilizing ion coordination and hydrogen-bond interaction of prednisolone sodium phosphate PSP under the action of Ca < 2 + >, and the hydrogel PCAu-coated P-Gel is formed by uniformly loading gold nanoparticles PCAu which are green synthesized from procyanidine PC and have stable surfaces. The hydrogel can promote rapid repair of spinal cord injury and relieve far-end muscle atrophy and fibrosis; and meanwhile, the injectable self-healing hydrogel has the engineering advantages of injectability, self-healing and the like, and shows good clinical transformation potential.

This invention discloses a rare-earth-doped antibacterial nanoceramic membrane, its preparation method, and its application, relating to the field of water treatment technology. The invention discloses an antibacterial nanoceramic membrane comprising an Al2O3 ceramic substrate and a membrane layer attached to the surface of the Al2O3 ceramic substrate; the membrane layer is obtained by coating the surface of the Al2O3 ceramic substrate with a membrane slurry and then sintering it; the membrane slurry includes ZrO2 powder and a rare-earth antibacterial agent, wherein the rare-earth antibacterial agent is a CeO2-La2O3 composite oxide. The antibacterial nanoceramic membrane prepared by this invention adopts a composite structure of an Al2O3 ceramic substrate and a rare-earth-doped ZrO₂ membrane layer; the Al2O3 substrate ensures the mechanical support performance of the membrane, while the membrane layer serves as a functional layer to achieve high-precision filtration and antibacterial functions. The membrane layer is obtained by sintering a membrane slurry containing a rare-earth antibacterial agent and ZrO₂ powder, solving the problems of easy detachment and excessive leaching of the antibacterial agent, and achieving a balance between mechanical and antibacterial properties.

The application discloses a method for depositing and modifying electrochemical graphene oxide with nanoparticles and a product and application thereof, and belongs to the technical field of electrocatalysts, and comprises the following steps: adding a noble metal salt solution and a sacrificial agent into an electrochemical graphene oxide dispersion solution to obtain a mixed solution, then performing ultraviolet irradiation reduction, performing suction filtration after reaction, and drying to obtain reduced electrochemical graphene oxide powder loaded with nanoparticles. The application also discloses the reduced electrochemical graphene oxide powder loaded with nanoparticles prepared by the method, and the application of the product in catalyst ink. The prepared reduced electrochemical graphene oxide powder has good reduction degree, and the nanoparticles loaded on the reduced electrochemical graphene oxide powder are uniformly distributed. The ultraviolet light induced reduction method has the advantages of simple operation, green environmental protection, simple process and the like.

The invention discloses an echelon utilization method of nitrate-containing wastewater, which comprises the following steps: S1, catalyst preparation: preparing a carbon fiber loaded metal particle catalyst by using metal nitrate in the nitrate-containing wastewater through soaking loading and Joule heat treatment; and S2, electrochemical reduction: assembling the catalyst into a membrane electrode assembly, and reducing nitrate ions in the nitrate-containing wastewater used in the step S1 or from another source into ammonia under an electrochemical condition. The method realizes synergetic recycling of metal ions and nitrate ions in the wastewater, forms a closed-loop process of treating waste with waste and turning waste into wealth, has the advantages of no secondary pollution, low cost, stable catalytic performance and capability of producing high-added-value ammonia products, and is suitable for nitrate-containing wastewater treatment in industries such as agriculture, photovoltaics, semiconductors and the like.

This invention relates to the field of functional polymer materials and discloses a method for preparing an antibacterial composite nanofiber material with cascade activity. The method includes: dissolving a gold precursor in a solvent; adding a polymer to obtain a polymer solution; reacting with a sodium borohydride solution; electrospinning to obtain an Au composite nanofiber membrane; dissolving TCPP in a mixed solvent of N-N-dimethylformamide / ethanol; adding Cu₂O, polyvinylpyrrolidone, and trifluoroacetic acid; reacting to obtain Cu-TCPP; adding the Cu-TCPP dispersion to the surface of the Au composite nanofiber membrane under vacuum filtration; and drying. In the antibacterial composite nanofiber material of this invention, Cu-TCPP is stably anchored on the surface of the nanofiber membrane, preventing excessive encapsulation of Cu-TCPP and thus reducing the therapeutic effect. In a weakly alkaline environment conducive to infection, this antibacterial composite nanofiber material can utilize Au nanozymes as initial enzymes to continuously catalyze the production of gluconic acid and H₂O₂ from glucose, thereby activating the POD-Like activity of Cu-TCPP to catalyze the generation of hydroxyl radicals to kill bacteria.

This invention discloses a method for preparing and applying phosphorus-doped sulfur nanoparticles. In these nanoparticles, phosphorus is uniformly distributed on the sulfur nanoparticles, forming S-P chemical bonds between them. Utilizing the properties that elemental phosphorus and sulfur are soluble and miscible in ethylenediamine solution, a solution of sulfur and phosphorus in a specific ratio is prepared and added to an organic solution containing a surfactant. A formic acid solution of a certain concentration is then added dropwise to precipitate the product. After washing and freeze-drying, the phosphorus-doped sulfur nanoparticles are obtained. This preparation method avoids high-temperature heating, directly forming P-S bonds through a wet chemical method to achieve phosphorus doping of sulfur. It boasts a high yield and can be mass-produced. The nano-sized phosphorus-doped sulfur particles, due to their excellent properties such as high specific surface area and nanoscale effect, can be applied in energy storage fields such as lithium-sulfur batteries, exhibiting excellent electrochemical performance.