421 results about "Nanoflower" patented technology

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

The invention relates to the field of super-hydrophobic materials, in particular to a basalt fiber composite material as well as a preparation method and application thereof. According to the composite fabric material provided by the invention, a multistage micro-nano rough surface of the MoS2 nanoflowers and the silver nanoparticles is constructed on the fiber substrate, so that not only is super-hydrophobic self-cleaning realized, but also the anti-icing performance is relatively high, and particularly, rapid heating is realized by combining broadband absorption of the MoS2 nanoflowers and a local surface plasma resonance effect of the silver nanoparticles; and meanwhile, the silver nanoparticles accelerate heat conduction, so that excellent ice melting capability is obtained. The high conductivity of the silver nanoparticles constructs a conductive path, and the layered structure of MoS2 triggers interface polarization, so that the electromagnetic shielding effectiveness of the X wave band is improved. The dual antibacterial mechanism of the MoS2 nanoflowers and the silver nanoparticles also realizes broad-spectrum efficient antibiosis, the preparation method is green and environment-friendly, the cost is low, and the requirements of complex scenes such as wearable electronic equipment, medical protection, polar region protection and national defense can be met.

The invention discloses a leukemia targeted therapy preparation as well as a preparation method and application thereof. Comprising a DNA nanoflower carrier targeting leukemia cells through a PTK7 receptor and benzene arsenic oxide loaded on the carrier. The DNA nanoflower carrier is obtained by rolling circle amplification, and a nucleic acid aptamer complementary sequence of targeted binding leukemia cells is introduced into a template chain subjected to rolling circle amplification. The preparation method comprises the following steps: modifying sulfydryl onto a DNA nanoflower by using DNA-Dithiol, then breaking a disulfide bond by using reduced glutathione to expose the sulfydryl, and loading benzene arsenic oxide onto the DNA nanoflower through a reaction between trivalent arsenic and the sulfydryl. The structure of the DNA nanoflower has a high surface area and high porosity, and can load a large amount of PAO, so that the killing performance on cancer cells is enhanced; the aptamer sgc8 sequence is introduced into the DNA nanoflower, so that the targeting of the DNA nanoflower to cancer cells is effectively realized; the preparation also has the advantages of being good in thermodynamic stability, easy to store, excellent in biocompatibility and the like, and has a very good application prospect.

The invention discloses a boron-containing copper-based three-dimensional metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: preparing Zn-based MBON from zinc salt, boric acid and imidazole through a hydrothermal method, and then completely replacing the zinc component with copper to obtain Cu-based MBON, namely the boron-containing copper-based three-dimensional metal organic framework material. The specific surface area of the material is large, and a three-dimensional nano flower-shaped unique structure is formed. The prepared material is used as a catalyst for furfural electro-hydrogenation and carbon dioxide reduction reaction, the diffusion efficiency of reactants (such as furfural and CO2) can be enhanced, rapid desorption of products (such as furfuryl alcohol and ethylene) can be promoted through the surface capillary action, meanwhile, generation of by-products caused by excessive reaction is inhibited, and the selectivity of target products is improved.

The invention discloses a nano flower-shaped covalent organic framework material as well as a preparation method, a device and application thereof, and belongs to the field of water treatment. An amino compound and an aldehyde group compound form a covalent organic framework structure with a specific flower-shaped structure under the action of a catalyst and a regulating agent, the covalent organic framework structure continues to react with a carboxyl compound, then metal is loaded, and the nano flower-shaped covalent organic framework material is obtained. Carboxyl in the carboxyl compound responds to uranium in water and does not respond to other metal ions, other interference ions are eliminated, in addition, the carboxyl compound further has sulfydryl which can fix subsequently-loaded metal ions, the loading capacity of the metal ions is improved, and the metal ions can be loaded on the surface of the metal ions in the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface. When the nano flower-shaped covalent organic framework material prepared by the method is used for treating water, uranium ions can quickly reach adsorption sites, and the material as an adsorbent is higher in stability and higher in adsorption selectivity.

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 double-morphology boron-containing Zn / Cu metal organic framework composite material as well as preparation and application thereof, and belongs to the technical field of fine chemical engineering. The double-morphology boron-containing Zn / Cu metal organic framework composite material is prepared through a one-pot hydrothermal reaction, and the double morphology comprises a three-dimensional nanoflower structure and a three-dimensional rod / columnar structure. Specifically, by adjusting the molar ratio of Zn to Cu in the coordination process with corresponding ligands, when the molar ratio of Zn to Cu reaches 1: 1, the original single nanoflower structure can generate a new three-dimensional rod / columnar structure, so that two composite forms are formed. The double-morphology boron-containing Zn / Cu metal organic framework composite material shows high activity and high selectivity when being used for two key reactions of electrochemical hydrogenation reduction and electrochemical oxidation of furfural.

The invention discloses a hexagonal bismuth phosphate modified indium zinc sulfide (ZIS / HBIP) composite catalyst and a preparation method thereof. The catalyst is applied to photocatalytic synthesis of HO. The indium zinc sulfide (ZIS) nano flower balls in the catalyst are prepared by a hydrothermal method, and then hexagonal bismuth phosphate (HBIP) is loaded on the surface of the ZIS by a room temperature precipitation method to obtain a series of ZIS / HBIP composite catalysts. ZIS and HBIP can effectively improve photo-induced electron-hole separation and transmission, improve the selectivity of direct two-electron oxygen reduction reaction (2eORR) and inhibit HO decomposition. Experimental results show that when the theoretical dosage of HBIP is 0.01 mmol, the prepared ZIS / HBIP 0.01 has the optimal photocatalytic activity, the HO yield within 1 h can reach about 955 [mu] mol.g.h, and efficient synthesis of HO in pure water is achieved.

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 relates to a nickel-iron layered double hydroxide with flaky nanoflower morphology and a preparation method and application thereof. The preparation method of the nickel-iron layered double hydroxide comprises the following steps: S1, dissolving nickel acetate in an organic solvent or a mixed solvent of the organic solvent and water to prepare a first solution; dissolving ferrite in water to prepare a second solution; and S2, uniformly mixing the first solution and the second solution to obtain a mixed solution, and standing and aging to obtain the ferronickel layered double hydroxide. The method is simple to operate, mild in reaction condition, low in equipment cost and green and environment-friendly in synthesis process; the NiFe-LDH prepared by the method is of a three-dimensional nanoflower structure, is uniform in morphology, has a high specific surface area, can provide more active sites, shows excellent electro-catalytic performance when being used as a catalyst for oxygen evolution by electrolysis of water, and has a wide application prospect in the fields of electrochemical energy storage, electro-catalysis, catalytic oxidation and the like.

The invention belongs to the field of nano sensors, and discloses an electrochemical sensor based on a porous silicon-platinum nanoflower-DNA composite material and a preparation method and application thereof. A porous silicon layer is prepared on a polished surface of a silicon wafer, then platinum nanoflowers and a T-rich sulfhydrylation DNA probe are modified, a metal film is plated on the other surface of the silicon wafer, and the electrochemical sensor is prepared and applied to melamine detection. The DNA probe can adsorb melamine on the surface of a material through a hydrogen bond and generate current response linearly related to the concentration of the melamine; hydroxyl on the surface of the porous silicon can enhance the adsorption effect on melamine; the platinum nanomaterial with the flower-shaped structure can enhance the sensitivity of the sensor; in addition, negative charges carried on the surface of the porous silicon and common coexisting substances of melamine have an electrostatic repulsion effect, so that the sensor has good selectivity. The high-performance nano sensor provides a novel method with practicability for on-site rapid detection of melamine.

The invention discloses a biological patch material with dry-state adhesion and wet-state easy stripping characteristics and application thereof, and belongs to the field of biological medicine. The biological patch material is prepared according to the following steps: by taking water-soluble protein as a template and copper ions in water-soluble copper salt as a metal coordination center, carrying out self-assembly on the template and drug molecules with phenolic hydroxyl structures to form nanoflowers; mixing the acrylamide, the sodium alginate, the water-soluble calcium salt and the nano-flowers to obtain the water-soluble calcium-based water-soluble nano-flower fertilizer. The biological patch material is adhered to the skin through electrostatic interaction, covalent bonds, physical interpenetration and topological tissues. The patch has skin adhesion in a dry state, so that the patch is convenient to fix; after the patch is in contact with burnt skin, the patch absorbs water and swells, the adhesive force is obviously reduced, and painless, easy and non-invasive stripping is realized. In addition, the patch has immunoregulation performance, can prevent stimulation and anaphylaxis caused by long-term contact with the skin, and promotes burn repair.

The invention relates to the technical field of gas sensors for detecting H2S at room temperature, in particular to a preparation method of a high-sensitivity MoSe2-based gas sensitive material for detecting H2S at room temperature. The high-sensitivity MoSe2-based gas sensitive material for detecting H2S at room temperature is prepared by synthesizing MoSe2 nanoflowers by adopting a hydrothermal method and uniformly loading In2O3 nanoparticles on the surfaces of the MoSe2 nanoflowers by adopting a mechanical mixing method. The preparation method is simple and convenient in process and low in cost, the MoSe2 / In2O3 composite material prepared by the method has a relatively high specific surface area, and an II-type p-n heterojunction interface formed by the composite material effectively promotes separation and migration of current carriers. The response to 0.05 ppm H2S, 0.1 ppm H2S, 0.25 ppm H2S, 0.5 ppm H2S and 1ppm H2S at room temperature (the gas response is calculated according to the formula R = (Rg-Ra) / Ra) is 1.37, 1.47, 1.85, 2.74 and 4.82 respectively, the response is far better than that of an existing pure-phase MoSe2 gas sensitive material, and the working temperature is lower than that of an In2O3 pure-phase material. The research provides an effective method for constructing a gas sensitive material with a large specific surface area and II type p-n heterojunction, and further promotes the development of a gas sensitive technology.

The invention relates to the field of water electrolysis hydrogen production, in particular to a NiCoCrFeAl high-entropy alloy coating material and a preparation method and application thereof. The NiCoCrFeAl high-entropy alloy coating material comprises a stainless steel base body and a NiCoCrFeAl high-entropy alloy coating growing on the stainless steel base body, and the NiCoCrFeAl high-entropy alloy coating is prepared from the stainless steel base body, the NiCoCrFeAl high-entropy alloy coating material is of a nanoflower array structure, and the NiCoCrFeAl high-entropy alloy coating is obtained through in-situ growth on the surface of stainless steel with a FeOOH and NiOOH nanoflower structure. According to the method, the stainless steel is pretreated by adopting a strong oxidant, the surface of the stainless steel is oxidized into FeOOH and NiOOH with nanoflower structures by utilizing Ni and Fe elements of the stainless steel, the surface area of the electrode is effectively increased, and the nanostructure is beneficial to hydrogen removal and reduction of hydrogen evolution overpotential.

The invention provides a preparation method of alpha, omega-diiodo perfluoroalkane, and belongs to the technical field of iodo perfluoroalkane synthesis. The preparation method disclosed by the invention comprises the following steps: under a protective atmosphere, enabling a nano flower type magnesium fluoride catalyst, 1, 2-diiodo tetrafluoroethane and tetrafluoroethylene to react, so as to obtain 1, 4-diiodo perfluorobutane and 1, 6-diiodo perfluorohexane. The nano flower type magnesium fluoride catalyst has high specific surface area and abundant coordination unsaturated sites, can effectively activate reactant molecule bonding sites, and avoids the problems of side reaction and catalyst deactivation caused by free radical paths; by optimizing the pore structure and reaction conditions of the catalyst, efficient synergistic conversion of IPF-2 and TFE can be realized, and the selectivity and yield of IPF-4 and IPF-6 are remarkably improved. The method provided by the invention has the advantages of mild conditions, safe operation, adjustable product distribution and the like, and meets the requirements of industrial production on high-selectivity fluorine-containing bifunctional compounds.

The present invention relates to a nickel-iron layered double hydroxide having a flaky nanoflower morphology and its preparation method and application. The preparation method of the nickel-iron layered double hydroxide comprises the following steps: S1, dissolving nickel acetate in an organic solvent or a mixed solvent of an organic solvent and water to prepare a first solution; dissolving a ferrous salt in water to prepare a second solution; S2, mixing the first solution and the second solution to obtain a mixed solution, and obtaining the nickel-iron layered double hydroxide through standing and aging. The method is simple to operate, has mild reaction conditions, low equipment cost, and a green synthesis process; and the NiFe-LDH prepared by the above method presents a three-dimensional nanoflower structure with uniform morphology and high specific surface area, which can provide more active sites. It exhibits excellent electrocatalytic performance as a catalyst for electrolysis of water and oxygen evolution, and has broad application prospects in the fields of electrochemical energy storage, electrocatalysis, and catalytic oxidation.

The invention designs a preparation method of an electrochemical sensor for detecting acrylamide based on a Ce-MOF and AuPd nanoflower composite material. The advantages of large surface area and good stability of Ce-MOF are utilized to load a large amount of AuPd NFs, and the composite material Ce-MOF (at) AuPd NFs with high conductivity is obtained. The preparation method comprises the following steps: modifying an electrode by virtue of a physical adsorption effect, fixing a triple-helix molecular switch THMS on the electrode by virtue of a gold-sulfur bond and a palladium-sulfur bond, when acrylamide exists, combining acrylamide with an aptamer, forming DNAzyme by virtue of single-stranded CDNA1 and single-stranded CDNA2, and driving a DNA walker amplification strategy in the presence of Mg < 2 + >, so that a hairpin HP1 is sheared, and a large amount of single-stranded S1 is obtained. According to the method, S1, signal tags combined on an electrode are reduced and signals are reduced by destroying a triple helix structure, so that acrylamide detection is realized. The electrochemical biosensor constructed by the method disclosed by the invention has relatively high specificity and relatively high sensitivity.

The invention belongs to the technical field of biological analysis and detection, and particularly relates to a photoelectrochemical-colorimetric dual-mode biosensor and application thereof in miRNA detection. According to the biosensor prepared by the invention, the bifunctional CuO-Cu2O nanoflower and the three-dimensional network g-C3N4 / AuNPs electrode are integrated, and an enzyme-assisted strand displacement signal amplification mechanism is combined, so that dual-mode collaborative detection of a target miRNA-21 is realized: in a photoelectrochemical mode, the detection limit reaches 0.35 fM (the linear range is 1 fM to 10 fM), and response is performed based on photocurrent polarity reversal; the colorimetric mode is as follows: the detection limit is 3.9 fM (the linear range is 10 fM to 10 nM), and TMB (Tetramethylbenzidine) color development visualization analysis is carried out. Single-mode interference is effectively eliminated through double-signal independent output and cross validation, and the method is suitable for high-reliability detection of trace miRNA (such as a breast cancer marker miRNA-21) in complex samples such as serum. According to the invention, the defects of insufficient sensitivity (pM level), poor anti-interference performance and high platform complexity in the prior art are overcome, and an efficient tool is provided for early diagnosis of cancers.

The invention relates to a preparation method of a CoFP / NF nanoflower catalyst and application of the CoFP / NF nanoflower catalyst in seawater electrolysis, and belongs to the technical field of electrocatalyst.The preparation method comprises the following steps that a cobalt source, a fluorine source and an organic solvent are dissolved in deionized water, and a mixed solution is formed; adding pretreated foamed nickel into the mixed solution, carrying out hydrothermal reaction, then cooling at room temperature to obtain reacted foamed nickel, washing with water and absolute ethyl alcohol, and then drying; and phosphorizing the dried foamed nickel under hydrogen-argon anti-oxidation protective gas, preserving heat, and cooling to room temperature along with the furnace to obtain the catalyst which is recorded as CoFP / NF. The method provided by the invention is simple in process and good in controllability, the raw materials are cheap and wide in source, the obtained nanoflower particles are uniform in particle size and have high dispersity and active sites, the reaction rate and efficiency of electro-catalysis are improved, and relatively high catalytic activity and excellent stability are obtained, so that the preparation cost of the catalyst is reduced, and the preparation cost of the catalyst is reduced. The electrochemical performance of the catalyst is improved.

The present invention relates to the technical field of surface modification of biochar, and discloses a method for enhancing the surface conductivity of biochar, a composite material loaded with transition metals thereof, and applications. Aiming at the problem of poor conductivity of biochar, in the present invention, lignocellulose or cellulose is impregnated in a solvent containing transition metal ions and nitrogen / oxygen / phosphorus heteroatoms, and a metal-heteroatom-cellulose complex precursor is formed through a hydrothermal reaction, and then through high-temperature calcination and pickling treatment, a composite material with a high-conductivity carbon layer and a stable transition metal nanoflower structure is prepared. This method utilizes the strong complexation of transition metals with cellulose and the solvent to form a metal-heteroatom-doped carbon layer on the surface of biochar, which has excellent interfacial electron transfer ability (R ct = 1.671 Ω). The obtained material has both a high specific surface area, a porous structure, excellent oxygen electrocatalytic activity, and acid corrosion resistance stability, and can replace noble metal catalysts and be applied to energy devices such as fuel cells.

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.

The present invention discloses a potassium-sodium co-doped manganese dioxide nanomaterial and its preparation and application. The present invention comprises the steps of dissolving silicate and manganese salt and mixing them to prepare a precursor; and treating the precursor by alkali etching. The potassium ions and sodium ions pre-embedded between the manganese dioxide layers stabilize the layered structure of the crystal, widen the interlayer spacing, and make the embedding and extraction of zinc ions and hydrogen ions smoother through electrostatic shielding. At the same time, the prepared potassium-sodium co-doped manganese dioxide nanomaterial has a unique nano-flower sheet structure, which increases the contact area of ​​the reaction. The electrochemical test results show that the potassium-sodium co-doped manganese dioxide nanomaterial has a good reversible specific capacity as a positive electrode material for zinc ion batteries. At a current density of 0.5 A / g, the high specific capacity can reach up to 239.1 mAh / g after 600 cycles.

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 invention provides a sodium ion battery and a preparation method of the sodium ion battery, and relates to the technical field of batteries. The preparation method of the negative electrode material of the sodium ion battery comprises the following steps: treating titanium-containing blast furnace slag to obtain metatitanic acid; metatitanic acid is treated, titanate is obtained, and the titanate has the nanoflower morphology; titanate is treated to obtain titanium dioxide, and the titanium dioxide has a nanoflower morphology and has oxygen vacancies. According to the negative electrode material prepared by the preparation method of the scheme, the migration rate of sodium ions can be improved, the specific capacity and the cycling stability of the negative electrode material are improved, and the negative electrode material has relatively good rate capability; and the negative electrode material is prepared by taking the titanium-containing blast furnace slag as a raw material, so that the cost of the raw material can be greatly reduced, and the environmental problem caused by solid waste accumulation can be solved.

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 present application relates to the technical field of biological medicine, and discloses inhalable aptamer modified molybdenum disulfide nanoflower compound and application thereof.The compound comprises a molybdenum disulfide nanoflower core, a dendritic polylysine modification layer attached to the surface of the molybdenum disulfide nanoflower, doxorubicin loaded on the molybdenum disulfide nanoflower and / or the dendritic polylysine modification layer, and AS1411 aptamer combined on the outer surface of the dendritic polylysine modification layer by electrostatic assembly.The compound can be delivered to a lung lesion by atomization inhalation or aerosol inhalation, and undergoes responsive structural change under the action of hydrogen peroxide in a tumor microenvironment, generates active oxygen, and promotes the release of doxorubicin, so as to realize the synergistic antitumor effect of chemotherapy and chemical dynamic therapy.The compound has good colloidal stability, drug loading capacity, active targeting ability and lung local delivery potential, and can be used for preparing inhalation preparations or local administration preparations for treating lung cancer.

The invention belongs to the field of electrochemical detection, and particularly relates to an integrated monolithic electrode adhered by a functional membrane, a preparation method and application of the integrated monolithic electrode in metal ion detection. The integrated monolithic electrode is characterized in that a working electrode, an auxiliary electrode and a reference electrode are integrated on a chip, the working electrode is the integrated monolithic electrode bonded by the functional membrane, the surface of a matrix electrode is modified, and the surface of the matrix electrode is coated with a coating; the modification material is one or more of carbon nanoflowers with a porous cage-shaped structure, metal nanoparticles and an enhanced electron conduction film. According to the invention, a working electrode in an integrated monolithic electrode is used as a substrate electrode, and the surface of the working electrode is cooperated with carbon nanoparticles and gold nanoparticles with porous cage structures through a functional film, so that a sensing system with excellent interface characteristics is constructed, and the sensor has the advantages of high sensitivity and high stability.

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.