160 results about "Nanoflower" patented technology

The invention discloses a preparation method of a metal doped type hydroxyapatite nanoflower. The method specifically comprises the following steps: dispersing a calcium source and soluble metal salt into water, adding acid phosphate, urea and L-histidine, uniformly mixing, carrying out a hydrothermal reaction, mechanically stirring, filtering, washing, and drying a hydrothermal system precipitate to obtain the corresponding metal-doped hydroxyapatite nanoflower. Compared with the prior art, the metal-doped hydroxyapatite nanoflower prepared by the preparation method disclosed by the invention is directly assembled by nanosheets, and a single metal type can be doped in a customized manner. According to the method, water is used as a unique solvent, the use of an organic solvent is avoided, the pH does not need to be adjusted in advance, the technological process is simple, operation is convenient, equipment investment is small, and the method is suitable for industrial production.

The invention discloses a Pt-based composite nanoparticle catalyst as well as a preparation method and application thereof, the catalyst comprises a V5O12 carrier and Pt nanoparticles loaded on the carrier, and the V5O12 is of a multi-stage layered nanoflower structure; the catalyst is obtained by in-situ generation of Pt nanoparticles on a V5O12 carrier. According to the catalyst disclosed by the invention, the superfine Pt nano-particles are loaded on the metal oxide V5O12, so that the activity and the stability of the catalyst are improved; in addition, the preparation method is simple to operate and low in cost, and large-scale production can be realized.

The invention discloses a preparation method of a cobalt-doped titanium dioxide three-dimensional nano flower-shaped hierarchical structure photoelectrode rich in oxygen vacancies and application of the cobalt-doped titanium dioxide three-dimensional nano flower-shaped hierarchical structure photoelectrode in the field of photoelectrocatalysis. The electrode is suitable for innocent treatment of nitrate-containing high-salinity wastewater. According to the preparation method, a cobalt-doped defect-state titanium dioxide photoelectrode is prepared by utilizing a hydrothermal method and a cation exchange method, a three-dimensional nanoflower hierarchical structure is presented, cobalt-oxygen vacancy double active sites are constructed, and low-concentration nitrate can be efficiently and highly selectively removed to nitrogen through photoelectrocatalysis. The method has the prominent characteristics that the method is applicable to a wide pH value range, and the nitrate wastewater has good adaptability and operation stability. The corresponding preparation method is simple to operate, and a reliable and highly feasible solution is provided for solving the problem of nitrate-containing wastewater treatment.

A method for exfoliating three-dimensional nanomaterials based on carbon nanotube growth is disclosed. A catalyst is loaded onto the surface of a three-dimensional nanomaterial composed of two-dimensional nanosheets. Energy, a carbon source, H2, and Ar are provided to the three-dimensional nanomaterial in a reactor to exfoliate the two-dimensional nanosheets by growing CNTs. The three-dimensional nanomaterial is composed of at least one combination of two-dimensional nanosheets, including nanoflowers and nanolayers. The two-dimensional nanosheets include at least one of alumina, silicon oxide, and magnesium oxide. The three-dimensional nanomaterial is obtained through hydrothermal or solvothermal chemical reactions. The energy is provided by indirect heating of the substrate, which is achieved by directly heating the reactor through thermal radiation or convection to generate heat in the substrate. This invention solves the problem of the difficulty in exfoliating three-dimensional nanomaterials.

The application discloses a preparation method of zinc oxide nanoflower fibers and application thereof. The preparation method comprises the following steps: cleaning and acid treating a nickel-chromium alloy wire base; preparing a zinc oxide seed layer on the surface of the nickel-chromium alloy wire base through an immersion-calcination method; and growing zinc oxide nanoflowers on the seed layer in situ through a hydrothermal method to obtain the zinc oxide nanoflower fibers. The fiber has the nickel-chromium alloy wire as the base, is good in flexibility and high in strength, has a firm combination of the zinc oxide nanoflower coating on the surface, is large in specific surface area, has rich active sites, and exhibits excellent selective adsorption capacity to polycyclic aromatic hydrocarbons. The application also provides application of the fiber in solid-phase microextraction, in particular, application of the fiber in enrichment and detection of trace polycyclic aromatic hydrocarbons in environmental water samples. The fiber is used for solid-phase microextraction of polycyclic aromatic hydrocarbons and detection of trace polycyclic aromatic hydrocarbons in environmental water samples, is low in detection limit, is good in reproducibility, is suitable for environmental water monitoring, and has important practical application value.

The application relates to the field of surface-enhanced Raman scattering, and specifically provides a three-dimensional SnSe2 surface-enhanced Raman scattering substrate and a preparation method thereof. The three-dimensional SnSe2 surface-enhanced Raman scattering substrate comprises a filter layer, a plurality of filter holes are arranged on the filter layer, a SnSe2 nanostructure layer is fixedly arranged on the upper side of the filter layer, the SnSe2 nanostructure layer is composed of SnSe2 nanostructures, the SnSe2 nanostructure is SnSe2 nanoflower, the SnSe2 nanoflower covers the filter layer, and the SnSe2 nanoflower blocks the filter holes on the filter layer. No vertical gap exists in the SnSe2 nanoflower structure, which makes the local effect of the SnSe2 nanoflower on a light field better, so that the Raman signal enhancement factor is improved. The preparation method of the three-dimensional SnSe2 surface-enhanced Raman scattering substrate comprises the following steps: S1, preparing SnSe2 nanoflower; S2, preparing an aqueous solution of the SnSe2 nanoflower; and S3, performing suction filtration to obtain the SnSe2 surface-enhanced Raman scattering substrate. The preparation method does not use a molecular beam epitaxy method, and the cost is low.

The invention relates to the technical field of electrochemical water treatment, in particular to a preparation method of a self-supporting antimony-doped tin dioxide nanoflower electrode, which comprises the following steps: dissolving trisodium citrate dehydrate and antimony trichloride in absolute ethyl alcohol; then adding water and stannous chloride dehydrate to form a precursor solution; heating the precursor solution, and naturally cooling; after cooling, carrying out solid-liquid separation on the bottom mud, and then cleaning and drying to obtain antimony-doped tin dioxide powder; taking antimony-doped tin dioxide powder, a pore-forming agent and a binder, grinding the materials until the materials are uniformly mixed, and transferring the materials into a tabletting mold for pressure casting to obtain a blank; and calcining the green body to obtain the product. Nano-flower-shaped antimony-doped tin dioxide powder is prepared, in the die casting and sintering process, due to the fact that nano-flower petals of the nano-flower-shaped antimony-doped tin dioxide powder are mutually staggered, a connection mode similar to a mortise and tenon joint mode is formed, and compared with nanospheres, the binding force between the powder is enhanced; and the mechanical strength, the electrochemical active area and the catalytic activity of the electrode are improved.

The application belongs to the field of functional materials, and particularly relates to a flow core nanoflower / polymer composite fiber membrane, a triboelectric electrode, a triboelectric device and preparation and application thereof. The flow core nanoflower / polymer composite fiber membrane is a fiber membrane material formed by interlacing and weaving of functional nanofibers. The functional nanofibers include polymer fibers and flow core nanoflowers dispersedly distributed in the polymer fibers. The polymer in the polymer fibers is a positive polymer or a negative polymer. The flow core nanoflower is a flower-shaped nanoparticle, which includes a gallium-indium composite oxide shell with a corrugated surface and a gallium-indium alloy core in a flow state filled in the shell. The application innovatively disperses the nanoflowers with a special flow core structure in the polymer fibers, so that the interface adaptability of the material can be changed, the application requirements of the triboelectric device can be met, and the triboelectric performance can be improved.

This invention discloses a NiAlEu-LDHs photocatalyst, its preparation method, and its application in catalytic CO2 synthesis of syngas, belonging to the field of catalyst preparation technology. The NiAlEu-LDHs photocatalyst is a europium-doped layered double hydroxide prepared by a hydrothermal reaction using nickel, aluminum, and europium sources, possessing a multi-level nanoflower-like structure assembled from nanosheets. The preparation method includes the following steps: a one-step hydrothermal method is used to dissolve the nickel, aluminum, and europium sources, along with urea and ammonium fluoride, in deionized water; the solution is then transferred to a polytetrafluoroethylene-lined autoclave for hydrothermal reaction. This invention introduces europium through a one-step hydrothermal method, constructing a europium-doped nanoflower-like NiAlEu-LDHs photocatalyst. In production applications, this invention's preparation method is simple and novel, with low synthesis cost, easy mass production, and significant application value.

The application provides a glucose detection test strip and a preparation method and application thereof. The preparation method of the glucose detection test strip comprises the following steps: taking copper sulfate pentahydrate, a phosphate buffer solution, glucose oxidase and horseradish peroxidase, mixing uniformly to obtain an enzyme-containing mixed solution; immersing a test strip in the enzyme-containing mixed solution, and obtaining an organic-inorganic hybrid nanoflower loaded test strip after reaction; immersing the organic-inorganic hybrid nanoflower loaded test strip in a mixed solution containing a chromogenic agent, a gel, bovine serum albumin and polyethylene glycol to obtain a glucose detection test strip. The preparation method of the glucose detection test strip has higher sensitivity and shorter response time.

The application discloses an aspergillus niger detection kit based on SERS and a preparation and detection method thereof. The kit comprises a SERS nanolabel, and the structure of the SERS nanolabel is that a bionic gold nanoflower is used as a gold core, and a Raman active dye and aspergillus niger specific aptamer are modified on the surface of the gold core. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, can collect Raman spectrum through a portable Raman spectrum equipment, can be used for analyzing trace aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the kit has advantages in operation simplicity, detection period and analysis cost. The kit is suitable for food safety monitoring.

The invention provides a nickel electrode with a multi-level structure and a preparation method thereof. The preparation method mainly comprises the following steps: preparing a bottom-layer concave-convex substrate structure by mixed acid dipping, and forming a middle layer and a catalyst layer structure by surface heterogeneous growth. According to the method, tight combination of the catalyst layer and the substrate is taken as a guide, the uneven nickel metal substrate is obtained through mixed acid etching aiming at the problem that the catalyst is prone to falling off, and a highly rough surface is provided for in-situ growth of a subsequent columnar middle layer. The nickel metal substrate and the nanoflower layer catalyst are connected through the middle layer, the binding force of the catalyst and the substrate is effectively increased, the catalyst is prevented from falling off, and industrial stable water electrolysis is achieved. The surface of the synthesized nickel electrode with the multi-level structure has excellent performance stability, the overpotential is only increased by 8 mV when the nickel electrode runs for 1000 hours under the current density of 500 mA cm <-2 >, and only 1.83 V is needed when the nickel electrode is in an electrolytic bath.

This invention discloses a modified sodium carboxymethyl cellulose (CMC) and its preparation method in the field of composite materials. The method involves first dissolving CMC in water to obtain a solution, and simultaneously ultrasonically treating a multi-scale heterogeneous nano-flower-like hydrotalcite-silicon hybrid material and a dispersant in water to obtain a slurry. The two materials are then mixed and stirred under gentle heating to obtain a blended composite liquid. Finally, the modified CMC product is obtained through casting, segmented heat treatment, and grinding. The hybrid material is prepared by synergistic modification of hydrotalcite with bifunctional silanes, further compounded with silica via a sol-gel method, and finally treated with an initiator in an aqueous phase. This hybrid material significantly improves the compatibility and interaction with the CMC matrix. The process conditions of this invention are mild, the operation is simple, and the resulting product exhibits excellent comprehensive performance, showing application potential in the field of composite materials.

This invention relates to the field of photocatalytic materials technology, disclosing an atomic-level catalytic material, its preparation method, and its application. The method includes mixing nickel chloride with deionized water to form a solution, adding thiourea and mixing thoroughly to obtain a mixture; ultrasonically treating the mixture and continuously stirring until completely dissolved; drying the dissolved solution in an oven to obtain a solid powder; placing the solid powder in a muffle furnace and calcining it in air, then cooling to obtain the atomic-level catalytic material. This atomic-level catalytic material exhibits a nanoflower-like structure, containing nickel elements distributed in single-atom form, without metal clusters. This invention is applied to the photocatalytic carbon dioxide reduction reaction. The introduction of nickel single atoms promotes the separation and migration of photogenerated charge carriers within the material, causing the carbon dioxide reduction reaction pathway to favor methane production, thus improving the selectivity of the target product in the catalytic reaction.

The invention discloses a quorum sensing quenching enzyme immobilization method of a 3D bio-printing self-assembled nanoflower enzyme-loaded scaffold and application of the quorum sensing quenching enzyme immobilization method. A quorum sensing quenching enzyme YtnP from deep sea is immobilized in an alginate matrix through a 3D printing technology to prepare a QQ scaffold, and the characterization, durability and antifouling performance of a 3D printing composite scaffold material are evaluated. The nanoflower enzyme-loaded scaffold has a continuous AHL degradation effect, and the AHL removal rate exceeds 99.98%. After 220 hours, the compound still has a remarkable inhibiting effect on biological pollution of the raw water PVDF membrane. The quorum sensing quenching enzyme 3D printing support carrying the self-assembled nanoflowers can replace a feeding channel grating, and the service life of a filter membrane subjected to biological scaling in a bioreactor can be remarkably prolonged through biodegradation.

The invention belongs to the field of preparation of organic-inorganic hybrid materials, and relates to a preparation method and application of cucurbit [n] uril-gold nanoparticles. Through a simple one-pot synthesis method, chloroauric acid, silver nitrate, a reducing agent and cucurbit [n] uril are added for co-reduction to prepare hollow gold nanoflowers; the gold nanospheres with different sizes are prepared by regulating and controlling the input amount of cucurbit [n] uril. The gold nanoparticle hybrid material shows excellent hydrogen evolution side reaction inhibition capability in the application of electro-catalysis CO2 reduction, and the CO selectivity is obviously improved.

The application relates to a preparation method of a ternary alloy nanoflower and an organic hybrid composite film thereof, and belongs to the technical field of nanometer materials and functional films. BiCl3, SbCl3 and TeO2 are dissolved in ethylene glycol, NaOH and PVP K30 are added, stirring is carried out at room temperature until a clear solution is obtained, the solution is transferred to a reaction kettle, and reaction is carried out in a blast drying oven; after cooling, centrifugal washing is carried out; after drying, a Bi-Sb-Te alloy nanoflower is obtained; the Bi-Sb-Te alloy nanoflower is mixed with a PEDOT:PSS aqueous solution; a conductive enhancer is added, ultrasonic dispersion is carried out to form a uniform slurry; the slurry is deposited on the surface of a glass substrate by using a drying machine through a flow casting method; after annealing, the film is peeled off, vacuum drying is carried out, and a flexible thermoelectric composite film is formed. Through the establishment of a trinity technology of "nanoflower morphology design-in-situ interface optimization-low temperature solution process", the problems of poor flexibility of traditional thermoelectric materials, nanocomposite interface failure and unsustainable high-temperature process are solved.

The invention provides a biodegradable diagnosis and treatment integrated rare earth fluorescent nano-drug. The drug comprises a rare earth nanoflower precursor formed by self-assembly of core-shell nanoparticles; the functional biomolecular layer covers the surface of the rare earth nanoflower precursor; the core-shell nanoparticles take rare earth nanoparticles as inner cores, and the surfaces of the inner cores of the rare earth nanoparticles are coated with alkaline earth metal ion shell layers; wherein the rare earth fluorescent nano-drug can release calcium ions at a tumor site. The rare earth ion core of the rare earth fluorescent nano-drug is not degraded, the fluorescent brightness is high, and the rare earth fluorescent nano-drug is used for treatment visualization; the shell layer can degrade and release calcium ions at the tumor part and is used for tumor treatment; the two are combined to realize tumor diagnosis and treatment.

The invention discloses a preparation method and application of a SiO2-loaded carbon quantum dot-doped delta-MnO2 nanoflower catalyst, and belongs to the field of preparation of advanced oxidation catalysts. The delta-MnO2 nanoflower structure doped with the carbon quantum dots is synthesized in situ on the surface of the SiO2 carrier rich in Si-OH groups,-OH with lone pair electrons can easily form hydrogen bonds with nitrogen atoms, oxygen atoms or sulfur atoms in antibiotic molecules, and the adsorption capacity is improved. Carbon quantum dots are added to regulate and control the morphology and the structure of the catalyst, a delta-MnO2 nanoflower structure which preferentially grows along crystal faces (111), (201) and (020) and is controllable in size is prepared, then the specific surface area of the catalyst is increased, more surface active sites can be exposed, and the catalyst is used for activating PMS to degrade antibiotics and shows excellent catalytic activity.

The invention relates to the field of heat-conducting and wave-absorbing composite materials, and discloses a 1T-MoS2 enhanced heat-conducting and wave-absorbing integrated composite material and a preparation method and application thereof.The preparation method comprises the following steps that 1T-MoS2 of a nanoflower wrinkle structure is prepared through a hydrothermal method; carrying out electrostatic self-assembly to prepare 1T-MoS < 2 > at BNNS; and preparing the 1T-MoS2 (at) BNNS / PDMS composite material. According to the preparation method disclosed by the invention, efficient wave absorption and continuous heat transmission are simultaneously realized in the composite material by constructing a nanoflower wrinkle-shaped heterostructure, so that the electromagnetic protection and heat management performance of an electronic device is improved, and the material disclosed by the invention can realize efficient combination of heat conduction and wave absorption dual functions without high-temperature calcination or a complex multi-layer structure; the application reliability and process controllability of the material are remarkably improved, meanwhile, the preparation complexity and cost of the material are reduced, and the method has wide application prospects and remarkable economic benefits and social benefits.

An optical fiber photoelectric sensor for synchronously detecting NT-proBNP and cTnI comprises an optical fiber, and a sensing area Zone I and a sensing area Zone II which are independent in function are etched on the optical fiber. Au NPs layers are modified on the surfaces of two sensing areas with independent functions to enhance the photoelectrochemical activity, bismuth oxyiodide nanoflowers and NT-proBNP aptamers are fixed on the surface of Zone I to serve as functional elements, and the specific detection of NT-proBNP is realized by excitation with the wavelength of 450 nm; a dsDNA structure containing a cTnI aptamer is fixed on the surface of Zone II, methylene blue is embedded into dsDNA, and the wavelength of 650 nm is used as an excitation light source to specifically detect cTnI. According to the invention, synchronous detection of NT-proBNP and cTnI can be realized, and the reliability of a detection result is improved.

The invention discloses an rGO-MWCNT (multi-walled carbon nanotube)-alloy nanoflower composite material as well as a preparation method and application thereof. The rGO-MWCNT-alloy nanoflower composite material disclosed by the invention is prepared from an rGO-MWCNT composite carrier and loaded Pt-Pd-Cu-Bi-W alloy nanoflower particles. The preparation method of the rGO-MWCNT-alloy nanoflower composite material comprises the following steps: (1) preparing the rGO-MWCNT composite carrier and the Pt-Pd-Cu-Bi-W alloy nanoflower particles; and (2) the rGO-MWCNT composite carrier and the Pt-Pd-Cu-Bi-W alloy nano flower particles are compounded. The rGO-MWCNT-alloy nanoflower composite material can be used as a catalyst for electrocatalytic oxidation of small molecular alcohol, has the advantages of high catalytic activity, good stability, good conductivity, low production cost and the like, and is simple and feasible in preparation process, short in flow, mild in reaction condition and suitable for large-scale industrial production and application.

The invention relates to a preparation method of a micro-nano flower-shaped bismuth oxide / bismuth composite material, and belongs to the technical field of composite material preparation. The method comprises the following steps: under a stirring condition, dissolving a bismuth source into a solvent, dropwise adding a reducing agent solution at a constant speed, and uniformly mixing to form a clear precursor reaction solution; placing the precursor reaction solution at the temperature of 150-250 DEG C, performing hydrothermal reaction for 2-7 hours, naturally cooling to room temperature, performing solid-liquid separation, and washing the solid to remove impurities to obtain a composite material; placing the composite material in a protective atmosphere, and carrying out heat treatment for 1-3 hours at the temperature of 150-250 DEG C; and introducing oxygen-containing gas, and carrying out heat treatment at 250-400 DEG C for 0.5-2 hours to obtain the micro-nano flower-shaped bismuth oxide / bismuth composite material. The micro-nano flower-shaped bismuth oxide / bismuth composite material is formed by utilizing the reducibility of a reducing agent to bismuth ions, self-boosting hydrothermal reaction and graded heat treatment, the composite material combines the excellent photoelectric property of bismuth oxide and the large specific surface area brought by a flower-shaped structure, and meanwhile, the electrical conductivity and the electrochemical activity of the composite material are further enhanced by loaded bismuth.

The invention discloses a NiFe LDH loaded nanosheet array electrocatalyst as well as a preparation method and application thereof. The electrocatalyst comprises a self-supporting substrate and an active component loaded on the surface of the self-supporting substrate; the active component comprises a NiFe LDH nanosheet array and a nanoflower-shaped NiFe LDH nanosheet, wherein the NiFe LDH nanosheet array almost vertically grows on the surface of the self-supporting substrate, and the nanoflower-shaped NiFe LDH nanosheet is arranged on the surface of the NiFe LDH nanosheet array. According to the electrocatalyst, due to the unique graded morphology, the first layer of nearly vertical nanosheets greatly improve the contact area with the carrier and the electron transmission capacity, the foamed nickel carrier is tightly wrapped, a certain physical chlorine prevention effect is achieved, and in addition, the second layer of nanoflower structure has the advantages that the anti-chlorine effect is good, and the anti-chlorine effect is good. The contact area of the catalyst and electrolyte is further increased, the active area is increased, and the electrochemical performance is improved.

The invention discloses a three-enzyme-inorganic hybrid nanoflower as well as a preparation method and an application method thereof, and belongs to the technical field of enzyme immobilization. The three enzymes in the material are creatininase, creatinase and sarcosine oxidase, and the carrier is calcium phosphate. According to the three-enzyme-inorganic hybrid nanoflower, creatininase, creatinase and sarcosine oxidase are loaded on the same carrier, and the three-enzyme-inorganic hybrid nanoflower can be generated on the surface of a working electrode in situ and can also be directly dropwise added to the surface of the working electrode for electrochemical precise detection of creatinine. The method has the advantages of being simple in operation, green, environmentally friendly and the like, and the prepared three-enzyme-inorganic nanoflower material is high in stability and rapid in detection and has a good application prospect in the field of biosensing.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

The invention relates to a copper-indium bimetallic nanoflower catalyst and a preparation method and application thereof, and belongs to the technical field of electrochemical reduction catalysts. The method comprises the following steps: taking foamed nickel as a substrate, firstly mixing indium sulfate and dilute sulphuric acid to obtain an indium deposition solution, and electrically depositing a layer of metal indium under the indium deposition solution; then copper sulfate and dilute sulfuric acid are mixed to obtain a copper deposition solution, metal copper is further electrically deposited on the foamed nickel loaded with indium metal, the foamed nickel subjected to electro-deposition is cleaned and dried, and the copper-indium bimetallic nanoflower catalyst is obtained. The prepared copper-indium bimetallic nanoflower catalyst is a self-supporting material, shows excellent performance in nitrate radical electroreduction, and is high in ammonia production Faraday efficiency, large in current density and good in ammonia production rate performance. The synthesis method is easy to realize large scale, mild in reaction condition and good in application prospect.

The invention provides a SnO2 nano material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a tin source with a solvent and a conditioning agent in sequence to obtain a precursor solution, then carrying out hydrothermal crystallization treatment on the precursor solution, and carrying out first calcination on the obtained solid product to obtain the SnO2 nano material. According to the preparation method, the SnO2 nano material is prepared through the hydrothermal synthesis method, the SnO2 morphology is regulated and controlled through the tin source, the regulator and the technological process, the prepared SnO2 material has the three-dimensional nano flower-shaped morphology, the size is uniform, the crystallinity is high, the preparation condition is mild, and the yield is high; when the catalyst is used as a carrier of a CO oxidation catalyst, the catalytic performance and the long-period stability of the catalyst can be improved through metal-carrier interaction.

The application discloses a MoS2 / Cu2S / MoO3 ternary composite material, wherein MoS2 nanoflowers are uniformly distributed on snowflake-shaped Cu2S, and MoO3 is distributed on the surface of the MoS2 nanoflowers. The application further discloses a preparation method of the MoS2 / Cu2S / MoO3 ternary composite material, which comprises the following steps: uniformly mixing a copper source, a solvent, a sulfur source and MoS2, and then performing reaction to obtain the MoS2 / Cu2S / MoO3 ternary composite material. The application discloses application of the MoS2 / Cu2S / MoO3 ternary composite material in electrocatalysis, photocatalytic degradation and surface enhanced Raman spectrum detection. The application can not only perform electrocatalytic hydrogen evolution in an alkaline environment, but also realize high-sensitivity SERS detection and high-efficiency photocatalytic degradation on various dyes in actual water bodies.

This invention provides a fluorine-doped ZnIn2S4 photocatalyst, its preparation method, and its application. The fluorine-doped ZnIn2S4 photocatalyst has a spherical nanoflower structure, which is composed of nanosheets arranged in an array. The preparation method includes the following steps: (1) adding ZnCl2, InCl3·4H2O, and thioacetamide to water and stirring to obtain a mixture A; (2) adding a fluorine source to mixture A and mixing thoroughly to obtain mixture B; (3) subjecting mixture B to a hydrothermal reaction, separating the product after the reaction, washing, and drying to obtain the F-ZnIn2S4 photocatalyst. The fluorine-doped ZnIn2S4 photocatalyst exhibits highly efficient photocatalytic activity.