76 results about "Imidazolate" patented technology

The invention discloses a carbon quantum dot / metal organic framework composite material as well as a preparation method and application thereof, and the method is characterized in that carbon quantum dots derived from waterborne polyurethane are embedded into a zeolite imidazate framework 8 to prepare the carbon quantum dot / metal organic framework composite material. The composite material can be used as a ratio type fluorescent probe for trace detection of tetracycline, a dual-emission fluorescence signal of the probe is derived from tetracycline which quenches blue fluorescence of puCDs at 450 nm through an inner filter effect, and the coordination effect between Zn < 2 + > and tetracycline triggers an aggregation-induced emission effect, so that new fluorescence emission is generated, and the detection sensitivity is improved. The intensity of the two signals changes in proportion to the concentration of tetracycline, the wide linear concentration detection range and the low detection limit are achieved, the probe has the high recovery rate and the large adsorption capacity in detection, the problems that a traditional detection method is insufficient in sensitivity, poor in anti-interference capacity, high in cost and the like are solved, and the application prospect is wide. A new thought is provided for constructing a ratio type fluorescent probe with a removal function.

The invention discloses an antibacterial polyolefin composite pipe and a preparation method thereof, and belongs to the technical field of polymer pipes. The antibacterial polyolefin composite pipe comprises an inner layer and an outer layer, wherein the inner layer comprises the following components in parts by mass: 88-95 parts of polypropylene random copolymer, 3-6 parts of an antibacterial agent, 3-6 parts of a compatilizer and 0.1-1 part of an antioxidant; the antibacterial agent comprises silver ions and an antibacterial carrier, and the antibacterial carrier comprises sulfonated graphene oxide and a metal type imidazolate skeleton. The antibacterial agent is introduced into the inner layer, the antibacterial agent is compounded by an antibacterial carrier and silver ions, precipitation of silver can be effectively slowed down, the initial antibacterial effect of the polyolefin composite pipe is guaranteed, meanwhile, the antibacterial durability of the polyolefin composite pipe is improved, breeding of microorganisms such as bacteria can be effectively inhibited under the actual working condition of tap water, and the service life of the polyolefin composite pipe is prolonged. Therefore, a pipeline system of the polyolefin composite pipe is suitable for conveying drinking water for a long time.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.

The invention provides a platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: mixing a polymer solution, a conductive agent and a zeolite imidazate framework material to obtain an electrostatic spinning solution; carrying out electrostatic spinning on the electrostatic spinning solution, and then carrying out heat treatment to obtain composite nanofibers containing metal nanoparticles or metal oxide nanoparticles; and mixing the composite nanofiber, a platinum source and an organic solvent, and carrying out a reduction reaction to obtain the platinum-based catalyst. According to the preparation method, the polymer solution, the conductive agent and the zeolite imidazate framework material are mixed, and uniform distribution of all the components on the nanoscale can be ensured by virtue of an electrostatic spinning technology, so that a stable and efficient three-phase interface can be formed; the metal nanoparticles or metal oxide nanoparticles obtained by conversion are compounded with platinum particles, so that the catalyst exposes more active sites, and the efficient proceeding of the catalytic reaction is facilitated.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.

The invention relates to a preparation method of a fluorescence sensor. The invention relates to a preparation method of a portable pesticide detection fluorescence sensor of silver nanocluster (AgNCs) at zeolite imidazolate skeleton (ZIF) at polydopamine (PDA) and application of the portable pesticide detection fluorescence sensor in on-site rapid detection of 2, 4-dichlorophenoxyacetic acid (2, 4-D), and belongs to the technical field of fluorescence sensors. The method comprises the following steps: wrapping AgNCs with ZIF, and modifying the surface of the AgNCs with dopamine to form an AgNCs-ZIF-PDA composite material with high stability, high fluorescence enhancement, high enzyme responsiveness and high controllability; then, the material is integrated into a nano clay-acrylamide hydrogel matrix with high fitness, and a sensor with an adjustable shape is constructed. The sensor can be adaptively attached to the surface of a plant and is used for long-term in-situ monitoring of 2, 4-D pesticide. And in combination with an image processing algorithm, the system realizes accurate tracking of the tomato plant surface 2, 4-D degradation process, and the detection limit reaches 23.3 ng / mL. According to the invention, non-intrusive and low-cost technical support is provided for crop health management and sustainable precision agriculture.

The present invention relates to a zeolite imidazolate framework open nanostructured functional flame retardant and a preparation method and application thereof, belonging to the technical field of advanced functional materials. The present invention provides a zeolite imidazolate framework open nanostructured functional flame retardant having a unique yolk-shell structure, the surface of which has a large number of mesopores and macropore structures added on the basis of the micropore structure of the zeolite imidazolate framework. The presence of a multi-level pore structure is beneficial to the adsorption of flammable gases and toxic and harmful gases during the combustion of polymer materials, and enhances the smoke suppression effect of the flame retardant. There is a good synergistic effect between the ferrocene grafted on the zeolite imidazolate framework and the zeolite imidazolate framework, which can enhance the flame retardant efficiency of the functional flame retardant and at the same time give it excellent ultraviolet absorption ability. In addition, the introduction of ferrocene can effectively improve the compatibility between the functional flame retardant and the polymer matrix, thereby enhancing the mechanical properties of the polymer.

The application provides a preferentially oriented zeolite imidazolate framework-8 self-supporting gas separation membrane and a preparation method thereof. The method comprises the following steps: dissolving zinc acetate dihydrate, 2-methyl imidazole and cetyl trimethyl ammonium bromide in deionized water, and finally forming a self-supporting gas separation membrane with preferential orientation and cubic morphology through stirring, centrifugal treatment, filtration, standing of the growth solution and drying. In the preparation process, the proportion of each component, stirring conditions, temperature and humidity of the constant temperature and humidity box and other parameters are strictly controlled to ensure uniform growth and good mechanical strength of the membrane. The preparation method is simple and efficient, and the obtained membrane has excellent gas separation performance and long-term stability.

The invention discloses multi-adsorption-site nitrogen-doped porous carbon, a preparation method and application in iodine adsorption, and the preparation method comprises the following steps: carrying out primary calcination on a zeolite imidazate framework material, mixing with potassium hydroxide, and then carrying out secondary calcination to obtain the multi-adsorption-site nitrogen-doped porous carbon. According to the invention, a zeolite imidazate framework material is used as a precursor, potassium hydroxide is introduced for high-temperature calcination activation treatment, the obtained product inherits a rhombic dodecahedron framework of ZIF-8, a continuous through pore system and a nitrogen-doped carbon material with high pyrrole nitrogen content are formed, and the static adsorption capacity of the nitrogen-doped carbon material to iodine can reach 7.99 g / g.

The application discloses a polyacid zeolite imidazolate framework loaded monatomic catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the catalyst is as follows: (1) preparing a zeolite imidazolate framework material; (2) mixing the dried zeolite imidazolate framework material and a metal salt in a solvent and stirring; then adding a heteropoly acid, controlling the pH in the system to be 5-7, and performing a solvothermal reaction under the condition of 80-120 DEG C; after the reaction is completed, cooling and centrifugal separation are performed to obtain a precipitate; and (3) performing calcination treatment on the precipitate to obtain the polyacid zeolite imidazolate framework loaded monatomic catalyst. The polyacid zeolite imidazolate framework loaded monatomic catalyst prepared by the method has high catalytic activity, high selectivity and good cycle stability, and has a good application prospect in acetyl propionate esterification reaction.

The application discloses a preparation method of a nano-composite enzyme for detecting tannic acid, and the method comprises the following steps: step one, adopting alkaline amino acids and polypeptides with imidazole groups to simulate the primary structure of natural oxidase, and preparing amino acid and polypeptide modified cerium oxide with enhanced oxidase and peroxidase performance; step two, in-situ compounding the polypeptide modified cerium oxide and zeolite imidazolate framework material with large specific surface area, good stability, hydrophilicity and hydrophobicity, and specific electron distribution to obtain nano-composite enzyme with enhanced oxidase and peroxidase performance; and step three, after etching treatment of the nano-composite enzyme in a polar medium, the nano-composite enzyme with enhanced oxidase and peroxidase performance for detecting tannic acid is obtained. By utilizing the competition between tannic acid and a substrate, the tannic acid is detected by using a colorimetric or fluorescent method, and the operation process is simple and rapid, the selectivity is high, the detection limit is low, the detection range is wide, and the nano-composite enzyme shows a good application prospect for sensitive detection of tannic acid.

In one embodiment is provided an energy-efficient post-combustion CO2 capturing process utilizing protic ionic liquids made of an organic superbase and a weak acid in the presence of moisture. The concept is demonstrated in one embodiment with the ionic liquid, 1,8-diazabiclclo(5.4.0)undec-7-enium imidazolate, [DBUH][Im].

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The invention discloses a method for preparing polyimide by reducing the imidization temperature of polyamide acid, which comprises the following steps: carrying out polymerization reaction on an aromatic diamine monomer and an aromatic dianhydride monomer in an organic solvent to generate polyamide acid, and then adding ZIFs to obtain a polyamide acid solution / ZIFs compound; the polyamide acid solution / ZIFs compound solvent is volatilized to obtain a polyamide acid / ZIFs compound, and then the polyamide acid / ZIFs compound is heated, so that the polyimide acid in the polyamide acid / ZIFs compound is subjected to imidization reaction to generate polyimide. By adopting the method to prepare the polyimide, the reaction temperature for generating the polyimide through imidization of polyamide acid can be obviously reduced, namely, the imidization temperature is reduced to 220 DEG C from the traditional imidization temperature greater than 300 DEG C, and the obtained polyimide has good thermal stability and transparency and can be applied to the high and new technical fields of display devices, photoelectrons, microelectronics, aerospace and the like.

The present application belongs to the field of environmental protection and new energy technology, and relates to a gaseous fermentation method for improving biogas quality by using zeolite imidazolate framework structure ZIF-8 material. The ZIF-8 material for improving the biological conversion efficiency of CO2 to CH4 is prepared, and has the effect of selectively adsorbing carbon dioxide and hydrogen. When applied to gaseous fermentation, the quality of the obtained methane can be effectively improved. The ZIF-8 material prepared by the present application is applied to an anaerobic gaseous fermentation system, and only a small amount of addition can promote the biological methanation process of CO2 in the biogas, increase the proportion of methane in the biogas, improve the quality of the biogas, and make the biogas reach the standard of direct use.

The application discloses a method for preparing monophenol chemicals by catalyzing lignin depolymerization through zeolite imidazolate framework material derivatives. The method uses lignin as raw material, uses zeolite imidazolate framework material derivatives as catalyst, and uses small-molecule organic alcohol as hydrogen-donor solvent. After inert gas replacement and pressure charging to 0.5-3 MPa, the reaction temperature is controlled to 200-240 DEG C, and stirring is carried out for 2-10 h, so that selective depolymerization of lignin can be realized without external hydrogen, and monophenol chemicals mainly composed of 4-propyl-2,6-dimethoxyphenol are obtained. The method is environment-friendly, stable in performance, highly efficient in catalysis and high in selectivity, and realizes selective conversion of lignin into monophenol chemicals mainly composed of 4-propyl-2,6-dimethoxyphenol without external hydrogen.

The application provides a material for promoting bone tissue repair and a preparation method and application thereof. The material for promoting bone tissue repair is a gold nanoparticle-zoelitic imidazolate framework synergistic gallic acid drug delivery system, wherein the gold nanoparticle is taken as a core, a zoelitic imidazolate framework is grown around the core, and a bioactive component, such as gallic acid, is loaded in the framework. The material is used for promoting bone tissue repair. The material loads the bioactive component through a nanoparticle and a zoelitic imidazolate framework compound, utilizes the osteogenesis and anti-inflammatory performance of the material, and promotes the regeneration and repair of bone tissue.

The invention discloses a fused salt heat storage material based on a lithium nitrate and polyvinylidene fluoride hybridized zeolite imidazate framework structure. The fused salt heat storage material comprises the following components in parts by mass: 20-35 parts of sodium nitrate, 25-40 parts of potassium nitrate, 10-20 parts of lithium nitrate, 10-25 parts of calcium nitrate and 0.5-2 parts of a polyvinylidene fluoride hybridized zeolite imidazate framework structure material, the polyvinylidene fluoride hybridized zeolite imidazate skeleton structure material is prepared by the following steps: step 1, adding a zinc nitrate solution into a 2-methylimidazole solution under a stirring condition, standing, carrying out a crystallization reaction, washing and drying to obtain a zeolite imidazate skeleton structure material; and step 2, mixing the zeolite imidazate skeleton structure material, polyvinylidene fluoride and dimethylformamide, and drying to obtain the polyvinylidene fluoride hybridized zeolite imidazate skeleton structure material. The fused salt heat storage material is high in specific heat capacity and low in viscosity.

The application discloses a preparation method of a dendritic T-NC and ionic liquid Pt / C catalyst and application thereof, and generates a zeolite imidazolate framework material (ZIF-8) by reacting a zinc salt with 2-methyl imidazole, and composites the ZIF-8 with a conductive carbon material. When high-temperature pyrolysis is carried out under an inert atmosphere, zinc species in the ZIF-8 volatilizes, thereby etching out abundant multi-stage pores in the carbon matrix, and forming a unique dendritic nitrogen-doped carbon structure (T-NC). The structure can effectively load and stabilize platinum nanoparticles. Subsequently, by infiltrating ionic liquid, the high ionic conductivity and interface characteristics of the ionic liquid are utilized to enhance the proton conduction of a catalytic layer and optimize a mass transfer process. The method is simple in process, and raw materials are easy to obtain. Through the synergy of the carrier structure and the interface microenvironment, the prepared catalyst realizes comprehensive improvement in oxygen reduction reaction activity, durability and low-humidity adaptability, and provides a feasible material solution for a high-performance, long-life and low-cost proton exchange membrane fuel cell.

The application discloses a SrCO3@ZIF-8 / polymer composite bone scaffold and a preparation method thereof, and comprises the following steps: growing zeolite imidazolate framework-8 (ZIF-8) on the surface of SrCO3 in situ to prepare SrCO3@ZIF-8 microrods, uniformly mixing the SrCO3@ZIF-8 microrods and a polymer material through grinding, and preparing the SrCO3@ZIF-8 / polymer composite bone scaffold by using a selective laser sintering technology. The SrCO3@ZIF-8 / polymer composite bone scaffold obtained by the application is applied to bone defect repair, and the Zn ions and Sr ions generated by in-vivo degradation of the scaffold can promote the differentiation of stem cells into osteoblasts, endow the scaffold with osteogenic activity, promote the polarization of macrophages into M2 type and the expression of related anti-inflammatory factors, and strengthen the anti-inflammatory performance of the scaffold. In addition, the ZIF-8 contains a large number of 2-methyl imidazole organic ligands, can form a strong interface with the molecular chain of the polymer, solves the problem of interface incompatibility between SrCO3 and the polymer, and thus improves the mechanical performance of the scaffold.

The application discloses a preparation method and application of an anti-adhesion nano composite drug delivery system, relates to the technical field of adhesives, and discloses the following technical scheme: polyacrylamide and aldehyde functionalized starch with a preset mass ratio are taken, different amounts of zeolite imidazolate framework materials are added after mixing, and then the mixture after mixing is ground and sieved to obtain the anti-adhesion nano composite drug delivery system. The application can be used as a peritoneal tumor local drug delivery system, has high drug encapsulation efficiency and drug loading rate, can release antitumor drugs in tumor tissues specifically, continuously and stably through a tumor acid microenvironment, prolongs the exposure time of the drugs, improves the curative effect of the drugs, reduces the side effects of chemotherapy, can reshape an immune microenvironment, has a good killing effect on tumor cells, and has no systemic toxicity; meanwhile, the gel powder forms a physical barrier on a surgical wound after being changed into a gel by water, so that abdominal cavity adhesion caused by surgical trauma and chemotherapy can be reduced.

The application relates to the technical field of analytical detection, in particular to an electrochemical gas sensor for detecting linalool and a preparation method thereof. The preparation method is to prepare the electrochemical gas sensor after modifying a molecular imprinting film-zeolite imidazolate framework-8-multi-walled carbon nanotube-zinc oxide (MIP-ZIF-8-MWCNT-ZnO) composite material on the surface of an electrode. The electrochemical gas sensor can sensitively and accurately detect the content of linalool gas released by plants, realizes stable and accurate detection of linalool with high specificity and high sensitivity in a complex environment, and has a wide application prospect.

The invention provides construction of a universal influenza virus fluorescent molecular imprinting sensor and a method for visually detecting influenza viruses. In the invention, a zeolite imidazolate skeleton (ZIF-8) coated red fluorescent quantum dots (R-QDs) is used as an imprinting carrier and signal output, influenza virus H7N9 is used as a template, and the molecularly imprinted polymer (MIPs) is prepared by a sol-gel technology. Meanwhile, the surfaces of the magnetic Fe3O4 nanoparticles are modified with phenylboronic acid (Fe3O4-FPBA) to serve as a capture element, and when the H7N9 virus is specifically bound with the MIPs, Fe3O4-FPBA can be bound with glycoprotein on the surface of the virus through boric acid esterification reaction, so that a sandwich composite structure of MIPs-virus-Fe3O4-FPBA is formed. Through the formation of the structure, separation and enrichment of a target object can be realized through a magnet, and meanwhile, the change of a quantum dot fluorescence signal is caused, so that visual detection of a target virus is realized, and high-sensitivity quantitative detection can also be performed through an ultraviolet and visible spectrophotometer. The sensor prepared by the invention is a general influenza virus sensor, and the fluorescent sensor suitable for visually detecting other target objects can be prepared by selecting other subtype influenza viruses as template molecules for molecular imprinting.

The invention provides a waterborne polyurethane emulsion as well as a preparation method and application thereof, and particularly relates to a waterborne polyurethane emulsion as well as a preparation method thereof and a waterborne polyurethane composite adhesive. The waterborne polyurethane emulsion is prepared from the following raw materials in percentage by mass: 15.0 to 16.0 percent of polycarbonate polyol, 3.0 to 5.5 percent of diisocyanate, 4.0 to 6.0 percent of a hydrophilic compound, 0.5 to 2.3 percent of a chain extender, 0.4 to 0.6 percent of a neutralizing agent, 20 to 25 percent of a diluent, 0.25 to 0.8 percent of an aminated zeolite imidazate framework material precursor and the balance of a solvent. According to the preparation method disclosed by the invention, the preparation raw materials of the waterborne polyurethane emulsion are designed, and the waterborne polyurethane emulsion with excellent performance is prepared by virtue of a synergistic effect of all the components, so that the waterborne polyurethane composite adhesive with excellent hydrolysis resistance and mechanical property is prepared.

The invention relates to the technical field of biomedical nano materials, in particular to a nano reagent loaded with near-infrared fluorescent dye IR817 as well as a preparation method and application of the nano reagent. The preparation method comprises the following steps: dissolving near-infrared fluorescent dye IR817 powder in a dimethyl sulfoxide solution to obtain near-infrared fluorescent dye liquor; mixing the near-infrared fluorescent dye liquor with the zeolite imidazate solution to obtain a mixture; wherein the molar concentration of the near-infrared fluorescent dye liquor is greater than or equal to 2mmol / L, and the concentration of the zeolite imidazate solution is 25mg / mL; and sequentially washing, evaporating and drying the mixture to obtain the nano reagent loaded with the near-infrared fluorescent dye IR817. According to the preparation method, based on a synergistic effect of physical protection of a ZIFs carrier, precise loading of an IR817 active component and purification post-treatment, stable improvement of the stability and functionality of the nano reagent is realized.

The invention discloses a glass fiber reinforced epoxy resin material and an antifouling antibacterial self-cleaning pipeline in the technical field of composite materials, the material comprises bisphenol A epoxy resin, cardanol modified phenolic amide curing agent, electronic grade glass fiber cloth and a plurality of auxiliaries, three functional modified compounds, namely a fluorosilane modified carbon nanotube anchoring agent, a silver-loaded zeolite imidazate framework antibacterial agent and a bionic multi-arm epoxidized POSS interface reinforcing agent, are introduced. The three compounds are obtained by a specific preparation method, and respectively play roles in enhancing interface anchoring, providing antibacterial and bactericidal functions and improving interface compatibility. The pipeline is prepared from the material, has multiple functions of super-hydrophobicity, antibacterial adhesion, sterilization and self-cleaning, realizes integrated combination of an antifouling and antibacterial coating and a matrix material, remarkably improves the service life and durability of the pipeline, and is suitable for the field of fluid transportation in a harsh environment.

The application discloses a controllable release nano-enzyme hydrogel for promoting chronic wound healing of diabetes, and a preparation method and application thereof. The hydrogel is prepared according to the following steps: (1) preparing Pd-ZIF8@DNase I nano-enzyme particles; (2) dissolving four-arm-polyethylene glycol-o-phenylenediamine (4a-PEG-OPA) in a tris-hydroxymethyl aminomethane-hydrochloric acid (Tris-HCl) buffer solution, adding 3-aminobenzoic acid solution, and forming a hydrogel network through a Schiff base reaction; and (3) uniformly dispersing the Pd-ZIF8@DNase I nano-enzyme particles obtained in the step (1) in the hydrogel system to obtain Pd-ZIF8@DNase I hydrogel. The controllable release nano-enzyme hydrogel based on the "enzyme-induced defective metal organic framework (MOF)" structure of zeolite imidazolate framework structure material 8 (ZIF8) with high electron transfer efficiency can target neutrophil extracellular traps (NETs) and has antioxidant activity, and can promote chronic wound healing of diabetes.

The application belongs to the technical field of photocatalytic material preparation, and particularly relates to a Co-CN photocatalyst based on ZIF-L derivation and a preparation method and application thereof. The application uses melamine, dimethyl imidazole and cobalt nitrate as raw materials, and utilizes water bath heating, program temperature control and vacuum calcination to synthesize a CN composite photocatalytic material modified by Co monatomic derived from zeolite imidazolate framework structure material (ZIF-L). The application has the advantages of simple process, convenient operation, low cost, non-toxicity, harmlessness, short reaction time and the like. The prepared photocatalytic material has excellent photocatalytic degradation performance on tetracycline in a water environment. When the photocatalytic material is applied to removal of tetracycline pollutants in water, the removal efficiency is improved while energy consumption and reaction cost are reduced, and the application is green, environmentally friendly and meets the environmental friendly requirements.

The application provides a platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: mixing a polymer solution, a conductive agent and a zeolite imidazolate framework material to obtain an electrostatic spinning solution; electrostatic spinning is performed on the electrostatic spinning solution, and then heat treatment is performed to obtain composite nanofibers containing metal nanoparticles or metal oxide nanoparticles; the composite nanofibers, a platinum source and an organic solvent are mixed to perform a reduction reaction, and the platinum-based catalyst is obtained. The polymer solution, the conductive agent and the zeolite imidazolate framework material are mixed, and the uniform distribution of various components on the nanoscale can be ensured by means of the electrostatic spinning technology, which is beneficial to the formation of a stable and efficient three-phase interface; the metal nanoparticles or the metal oxide nanoparticles obtained by conversion are combined with platinum particles, so that more active sites of the catalyst are exposed, and the efficient performance of the catalytic reaction is promoted.

The invention relates to the technical field of analysis and detection, in particular to an electrochemical gas sensor for detecting linalool and a preparation method of the electrochemical gas sensor. According to the preparation method, the surface of the electrode is modified with a molecularly imprinted membrane-zeolite imidazate framework material-8-multi-walled carbon nanotube-zinc oxide (MIP-ZIF-8-MWCNT-ZnO) composite material, and then the electrode is prepared. The electrochemical gas sensor can sensitively and accurately detect the content of linalool gas released in plants, and high-specificity and high-sensitivity stable and accurate detection of linalool in a complex environment is realized. Through the technology, plant diseases can be found in an early stage, infection propagation of the diseases can be prevented, crop loss can be resisted, and the method has a wide application prospect.