206 results about "Copper nanoparticle" patented technology

The invention discloses copper paste, an electrode and a preparation method and application of the electrode, the electrode comprises copper powder, the copper powder comprises nano-copper particles and flaky copper powder, the nano-copper particles comprise at least two connected copper nanoparticles, and the adjacent copper nanoparticles are connected in a surface contact mode. According to the electrode disclosed by the invention, the nano-copper particles formed by connecting more than two copper nano-particles are filled in the gap areas among the large-size flaky copper powder, so that the nano-copper particles are in direct contact with the flaky copper powder, conductive channels among the conductive particles are smoother, and the structure of the electrode is more compact due to the filling of the nano-copper particles; the bulk resistance of the electrode is greatly reduced and is equal to the conductivity of a silver electrode; the nano-copper particles can also be used as an auxiliary adhesive after being sintered and cured, so that the adhesive force between the copper grid line and the solar cell is improved, and the connection between the grid line and the solar cell is firmer.

The invention discloses antibacterial glaze paste for a ceramic false tooth and a preparation method thereof, and belongs to the technical field of antibacterial glaze paste manufacturing, the antibacterial glaze paste for the ceramic false tooth comprises: 70-95% of glaze powder matrix composed of feldspar, quartz, kaolin and calcium carbonate; the antibacterial agent is composed of zinc oxide and bismuth oxide, the molar ratio of the bismuth oxide to the zinc oxide is 5%-18%, the surfaces of particles of the antibacterial agent are coated with a plurality of silicon dioxide shell layers, the thickness of the shell layers is 3-15 nm, and the shell layers are treated through a coupling agent; the antibacterial agent can further contain a trace amount of silver or copper nanoparticles with the mass fraction of 0.01-0.3%, and through the synergistic effect of zinc oxide and bismuth oxide, limited release of multiple SiO2 shell layers and addition of a trace amount of Ag / Cu, the ceramic false tooth antibacterial glaze paste can keep efficient antibacterial ability for a long time without external illumination or special excitation conditions, the antibacterial rate is larger than or equal to 98%, and the antibacterial effect is good. The method is obviously superior to uncoated or single-step sintered contrast samples.

The invention relates to a porphyrin metal organic framework composite material, a preparation method and a biogenic amine SERS (Surface Enhanced Raman Scattering) array sensor. The preparation method of the composite material comprises the steps that a copper precursor solution is added into a surfactant, heating reaction is conducted, a reducing agent is added, heating reaction is conducted, and copper nanoparticles are obtained; the preparation method comprises the following steps: adding a transition metal salt and a surfactant into an organic solvent, adding a porphyrin ligand, carrying out a solvothermal reaction, carrying out centrifugal separation, washing and drying to obtain a porphyrin metal organic framework material, and dispersing the porphyrin metal organic framework material into the organic solvent to obtain a dispersion liquid A; and dispersing copper nanoparticles in the dispersion liquid A, carrying out a second heating reaction, and carrying out centrifugal separation, washing and drying to obtain the porphyrin metal organic framework composite material. The invention also provides the porphyrin metal organic framework composite material prepared by the preparation method, and the application of the porphyrin metal organic framework composite material as a biogenic amine SERS array sensor. The invention solves the problem that the accuracy of the detection result is influenced because the traditional biogenic amine detection method is difficult to realize field detection.

The invention discloses an antibacterial dressing based on gallic acid-copper coated gamma-polyglutamic acid and a preparation method and application thereof, and belongs to the technical field of biomedicines.The preparation method comprises the steps that gallic acid and copper chloride dihydrate are dissolved in pure water according to the mass ratio of 3: 1, and stirring is conducted to form a solution I; stirring and reacting the solution I at 40 DEG C for 24 hours, centrifuging, collecting precipitate, washing with pure water, and freeze-drying to obtain gallic acid-copper nanoparticles; the gallic acid-copper nanoparticles and gamma-polyglutamic acid powder are mixed and dissolved in pure water according to the mass ratio of 3: 20, and after freeze drying, gallic acid-copper coated gamma-polyglutamic acid hydrogel powder is obtained. The gallic acid-copper coated gamma-polyglutamic acid hydrogel powder disclosed by the invention can absorb exudate near a wound and is subjected to in-situ gelation to form a hydration layer, so that damage to newborn tissues caused by frequent dressing replacement is avoided; it is verified that the healing promoting effect of the hydrogel can be remarkably enhanced through blue light adjuvant therapy, and the healing speed of infected wounds is remarkably increased.

Provided are copper nanoparticles that: (I) have excellent dispersibility in an organic solvent and thus makes a paste containing the copper nanoparticles from which a highly smooth coating film can be formed; and (II) have excellent sinterability at low temperatures. At least a portion of the surface layer of each of the copper nanoparticles coated by a reducing agent is a film that contains copper oxide and optionally contains copper carbonate. The surfaces of the copper nanoparticles are coated with a reducing agent, where the mass carbon concentration is 0.10% to 2.00%.

The invention relates to the technical field of photocatalytic processes, in particular to a catalyst for preparing methanol through photocatalytic reduction of CO2 as well as a preparation method and application of the catalyst. The catalyst comprises a composite carrier and active sites dispersed on the surface or in pores of the composite carrier, the composite carrier is of a heterojunction composite structure formed by a hollow TiO2 sphere and MCN, the hollow TiO2 sphere comprises a shell layer and a spherical cavity structure located in the shell layer, the shell layer is formed by TiO2 nanoparticles, and the MCN has a mesoporous pore structure; a II-type or Z-type heterojunction interface is formed between the hollow TiO2 spheres and the MCN through physical contact and chemical action; the active sites comprise copper nano species, sulfur vacancy defects and amino groups; the copper nano species are copper nano particles or clusters, and the valence state of copper is 0 and / or + 1 valence amino is grafted on the surface of the composite carrier through an organic long chain. The catalyst provided by the invention can greatly improve the yield and selectivity of methanol prepared by photocatalytic reduction of carbon dioxide.

The application relates to the development and technical field of electrocatalysts, and discloses a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving inorganic copper salt and inorganic zirconium salt, adding the inorganic copper salt and the inorganic zirconium salt into an alkaline solution, and performing hydrothermal reaction to obtain a single-atom zirconium-doped copper oxide precursor; dissolving benzothiadiazole, adding the benzothiadiazole into a dispersion solution of the single-atom zirconium-doped copper oxide precursor to obtain a mixed solution; spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material; and performing electrochemical reduction treatment on the benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material to obtain a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material. The electrode material is applied to an electro-reduction carbon dioxide reaction as a working electrode, exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes high-value-added C 2+ product with high selectivity.

The application provides a one-dimensional iron oxide nanorod heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of photoelectrocatalytic water splitting hydrogen production. The composite material provided by the application comprises: one-dimensional iron oxide nanorods, cuprous sulfide nanoparticles loaded on the one-dimensional iron oxide nanorods, and cobalt hydroxide nanosheets coated on the surfaces of the one-dimensional iron oxide nanorods and the cuprous sulfide nanoparticles. On one hand, the Fe2O3 / Cu2S p-n heterojunction is introduced to accelerate the separation of photo-generated carriers in the Fe2O3 nanorod array, and on the other hand, the Co(OH) x The surface OECs accelerate the kinetics process of interfacial water oxidation, the rapid depletion of photo-generated holes further improves the charge separation of the photoanode surface, and the synergistic effect between the Fe2O3 / Cu2S p-n heterojunction and the OECs significantly improves the PEC water splitting performance of the iron oxide nanorod array composite material.

One object of the present application is to provide composite copper nanoparticles that have high dispersibility in organic solvents and can be used to form a smooth electrode film. The present invention provides composite copper nanoparticles in which the surfaces of copper nanoparticles are modified with a silane coupling agent, wherein the copper nanoparticles have a coating film containing copper oxide on at least a part of the surface, and wherein the mass carbon concentration derived from the silane coupling agent in the composite copper nanoparticles is 0.1 to 1.2% by mass with respect to the total mass of the composite copper nanoparticles or wherein the number of surface groups derived from the silane coupling agent on the surface of the composite copper nanoparticles is 1.0 to 13.0 per 1 nm2 of the surface area of the composite copper nanoparticles

The invention discloses a method for preparing a water inlet separation net loaded with copper oxide nanoparticles and having a self-cleaning function, and particularly relates to a method for preparing the water inlet separation net with the self-cleaning function by constructing a dopamine coating on a polypropylene separation net and then loading the copper oxide nanoparticles. The preparation method comprises the following steps: introducing a dopamine solution to the surface of a polypropylene separation net to form a polydopamine coating, chelating Cu by using surface functional groups of the polydopamine coating, then forming Cu (OH) in an alkaline environment, and further converting the Cu (OH) into CuO nano-particles to be deposited on the surface of the separation net; the finally prepared functional separation net is stable in structure, has self-cleaning capability, and can effectively slow down pollution in roll-type reverse osmosis and nanofiltration membrane elements.

The application relates to the development and technical field of electrocatalysts, and discloses a preparation method and application of a proton sponge modified fluorine atom doped metal copper electrode material, which comprises the following steps: adding a dispersion solution of a proton sponge into a dispersion solution of a hydroxyl copper fluoride precursor to obtain a mixed solution; uniformly spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a proton sponge modified hydroxyl copper fluoride precursor electrode material; and then electrochemically reducing the proton sponge modified hydroxyl copper fluoride precursor electrode material to obtain the proton sponge modified fluorine atom doped metal copper electrode material. The application further discloses the proton sponge modified fluorine atom doped metal copper electrode material obtained by the above preparation method and application of the proton sponge modified fluorine atom doped metal copper electrode material to an electro-reduction carbon dioxide reaction as a working electrode. The electrode material provided by the application exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes the preparation of high-value C 2+ products with high selectivity under an industrial-grade current density.

This application provides a method for preparing gallium oxide (GaO) with enhanced ultraviolet absorbance and a GaO material prepared according to this method. First, a GaO thin film capable of generating ultraviolet absorption is grown on a substrate by magnetron sputtering. The GaO thin film is then annealed. Next, a copper thin film is grown on the GaO thin film by magnetron sputtering, followed by rapid annealing, causing the copper film to crack into copper nanoparticles under heat. This preparation method utilizes copper nanoparticles to enhance the ultraviolet absorption performance of GaO. The process steps are simple and easy to operate, thus effectively reducing the preparation cost. Furthermore, the GaO material prepared by this method shows a significant improvement in ultraviolet absorbance.

The invention discloses a photoresist composition based on metal nanoparticles and application of the photoresist composition. The photoresist composition comprises metal nanoparticles, a photosensitizer, an anti-diffusion agent and a photoresist solvent, wherein the metal nanoparticles are silver nanoparticles, copper nanoparticles and gold nanoparticles. The photoresist composition has good film-forming property and excellent patterning imaging capability, photoetching patterns with different resolutions can be obtained through ultraviolet, electron beam or extreme ultraviolet exposure, and the formed patterns have good conductivity after being subjected to heat treatment and can be directly used for processing micro-nano devices.

The invention provides a dialysis catheter based on a swirl flow technology, and relates to the field of dialysis catheters.The dialysis catheter comprises a connecting mechanism, the connecting mechanism comprises a connecting block, a vein connecting pipe and an artery connecting pipe, and a catheter mechanism is arranged at the bottom of the connecting mechanism; the catheter mechanism comprises a venous catheter, a venous side hole, an arterial catheter, an arterial side hole and a spiral flow induction unit, the inner wall and the outer wall of the catheter mechanism are each provided with a nano-coating mechanism, and each nano-coating mechanism comprises a copper nano-particle coating and a black phosphorus nano-coating. By arranging the spiral flow inducer, blood pressure is rotated, the wall surface shear stress of the inner wall of an artery cavity is improved, the risk of thrombus generation is reduced, wall suction is effectively prevented by arranging the vein side hole and the artery side hole, and the thrombus generation risk is reduced. Through cooperation of the copper nanoparticle coating, the black phosphorus nano coating and the graphene oxide coating, the coating has multiple antibacterial mechanisms such as contact sterilization, ion interference, oxidative stress induction and the like.

The invention provides a preparation method of a composite fiber and a fabric with sunlight barrier performance. The preparation method of the composite fiber comprises the following steps: S10, respectively preparing a skin layer melt and a core layer melt; the skin layer melt comprises a thermoplastic polymer matrix and titanium dioxide particles; the core layer melt comprises a thermoplastic polymer matrix, titanium dioxide particles and cesium tungsten bronze nanoparticles; s20, the skin layer melt and the core layer melt are introduced into a composite spinning assembly, the skin layer melt is controlled to wrap the core layer melt to form skin-core type composite fluid, and the skin-core type composite fluid is extruded through a spinneret plate with triangular holes; and S30, carrying out cross air blowing cooling, drafting and winding on the extruded fluid to obtain the sheath-core type composite fiber with a triangular cross section outer contour. The composite fiber can keep good spinnability and hand feeling, can block sunlight and heat at the same time, and provides better wearing comfort.

The application belongs to the technical field of catalysts, and particularly relates to a copper-based catalyst, a preparation method thereof and a method for synthesizing polycarbon alcohol from CO2 / CO. The preparation method of the copper-based catalyst provided by the application comprises the following steps: loading a copper nanoparticle solution into a high-pressure reaction kettle with a stirring rotor, first performing gas washing treatment by using high-purity CO gas, then filling CO, sealing the high-pressure kettle and transferring the high-pressure kettle to a heating container, performing reaction under stirring and heat preservation, performing pressure relief to normal pressure after the reaction, and performing centrifugal separation and drying treatment to obtain copper nanobands. The method adopts CO to assist in growing the copper-based catalyst, and widens the catalyst system for synthesizing polycarbon alcohol products.

Metallic nanoparticle agglomerates can deliver biocidal activity to surfaces on which they are deposited and adhered, such as various air filtration media. Air filtration media can include a plurality of fibers to which a plurality of metallic nanoparticle agglomerates are adhered. The metallic nanoparticle agglomerates can include a plurality of fused, partially fused, or unfused metallic nanoparticles associated with one another on the surface of the plurality of fibers. Suitable metallic nanoparticles for facilitating biocidal activity against various pathogens, such as viruses and bacteria, can include copper nanoparticles and / or silver nanoparticles. Face masks, inline filters, and air filtration systems can integrate the air filtration media.

The invention provides a solar cell and a photovoltaic module, and belongs to the technical field of solar cells. The solar cell comprises: a cell body having a first surface and a second surface opposite to each other; the plurality of current collection electrodes are positioned on the second surface of the battery body, and the plurality of current collection electrodes are alternately arranged at intervals according to different polarities; wherein the collector electrode is made of copper, and at least one copper nanoparticle is arranged on the first surface of the battery body. The copper nanoparticles on the front surface of the battery body can absorb and reflect short-wave ultraviolet light harmful to the battery body, so that performance degradation and material aging of the battery are delayed.

This invention discloses a method for fabricating a near-zero temperature coefficient thin-film pressure sensor with a wide temperature range. The purpose of this invention is to address the common problem of insufficient environmental adaptability in existing flexible thin-film sensors, particularly the significant performance degradation under extreme temperature conditions. This invention proposes a wide-temperature-range intrinsically self-compensating flexible pressure sensor based on a PVDF / CFT / Cu composite sensing material thin film. This sensor achieves a near-zero temperature coefficient of resistance for the composite material by synergistically introducing carbon fiber tubes with negative temperature coefficients and copper nanoparticles with positive temperature coefficients into the flexible PVDF matrix and dynamically controlling their ratio, thereby constructing a temperature self-compensation mechanism at the material level. This invention provides an effective material solution for developing next-generation high-reliability, wide-temperature-range adaptive flexible sensing systems.

The invention provides a cobalt porphyrin copper oxide graphene composite electrocatalyst and a preparation method and application thereof, and belongs to the technical field of water treatment. The catalyst obtained by the invention is used for electrocatalyzing nitrate in water to reduce and synthesize ammonia at room temperature. A surface physical modification method is adopted, cobalt porphyrin and a graphene raw material modified with copper oxide nanoparticles are mixed in an organic solvent, and the graphene-loaded copper oxide and cobalt porphyrin composite electrocatalyst is synthesized through simple pi-pi interaction. The method for preparing the catalyst is simple, cobalt porphyrin is introduced around copper oxide nano-particles through pi-pi interaction, synergistic catalysis of graphene, copper oxide and cobalt porphyrin in the nitrate electro-catalysis process is facilitated, and therefore the selectivity and activity of reducing nitrate into ammonia through electro-catalysis are improved; the ammonia yield and the Faraday efficiency are improved.

Some aspects are generally related to electrocatalysts, for example, for use during electrocatalysis. In some embodiments, the electrocatalysts may be included in a system configured to perform electrocatalysis. For instance, a system may include an electrode that is associated with a first oligo- or polynucleotide and an electrocatalyst that is associated with a second oligo- or polynucleotide. According to some such embodiments, the first and second oligo- or polynucleotides may at least partially base pair and substantially tether the electrocatalyst to the electrode. In some cases, the electrocatalyst comprises nanoparticles comprising copper (Cu), which may be suitable to be configured in a system for the electrocatalytic reduction of carbon dioxide (CO2). Some aspects are related to electrocatalysts comprising copper nanoparticles having shapes and / or compositions that may desirably affect their electrocatalytic performance, for instance, the related faradaic efficiencies and / or product distributions obtained during electrocatalysis using the nanoparticles. Still other aspects are generally directed to related methods of making and / or using the electrocatalysts and / or systems.

A scaffold for bone-tissue engineering includes a mesh and a coating on the mesh. The mesh includes a plurality of offset layers of filaments of polyester. The coating covers the mesh and includes magnesium hydroxide / copper oxide nanoparticles suspended in gelatin. A method of constructing the scaffold comprises combining magnesium hydroxide / copper oxide nanoparticles with a gelatin solution and coating a polyester mesh with the combined magnesium hydroxide / copper oxide nanoparticle and gelatin solution.

The invention belongs to the field of environmental protection and air purification, and particularly relates to a nitrogen-doped titanium dioxide loaded copper nanoparticle photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: synthesizing an N-TiO2 carrier through a low-temperature hydrolysis method, and loading Cu NPs on the N-TiO2 carrier through a wet impregnation method to prepare the Cu / N-TiO2 catalyst. The Cu / N-TiO2 photocatalyst obtained by the invention can effectively catalyze and remove NO and CO under the conditions of 120-210 DEG C and visible light, and has good stability and NH3 selectivity. Compared with an N-TiO2 carrier, the performance of removing NO and CO through photocatalysis and the NH3 selectivity are obviously improved. The high-cost limitation of a traditional noble metal catalyst is broken through, an innovative solution is provided for low-temperature photo-thermal synergistic purification of motor vehicle exhaust, and application and popularization are facilitated.

The present application relates to a kind of cationic polymer coated copper-based catalyst and its preparation method and application, belong to catalyst technical field.The preparation method of the present application includes the following steps: S1, 5-bromo indigo and 5-bromo indole-2-ketone are reacted in acid solution to obtain 5,5 '-dibromo isoindigo;S2, 5,5 '-dibromo isoindigo, potassium hydroxide and 1,4-dibromobutane are dissolved in organic solvent to carry out reaction to obtain N,N-dibutyl-5,5-dibromo isoindigo;S3, N,N-dibutyl-5,5-dibromo isoindigo, trimethylamine hydrochloride and base are reacted in solvent to obtain double quaternary ammonium dibromo isoindigo;S4, copper nanoparticles suspension is added to the double quaternary ammonium dibromo isoindigo solution to carry out self-assembly reaction, and cationic polymer coated copper-based catalyst is obtained.The catalyst exhibits excellent electrocatalytic carbon dioxide reduction performance in acidic electrolytic system, and can be highly selective to prepare ethanol.

Disclosed herein are glass-ceramics that may include a phase assemblage including: 35 wt % to 60 wt % of a petalite crystalline phase; 20 wt % to 60 wt % of a lithium disilicate crystalline phase; and 5 wt % to 20 wt % of a residual amorphous glass phase. The glass-ceramics may further include copper metal nanoparticles dispersed in the residual amorphous glass phase. The glass-ceramics may appear red in color and comprises transmittance color coordinates in CIE LAB color space of: L* greater than or equal to 0 and less than or equal to 100; a* greater than or equal to −23 and less than or equal to 62; and b* greater than or equal to −10 and less than or equal to 60.5 at an article thickness of 0.55 mm for a CIE illuminant D65 under SCI UVC conditions and a 10 degree observer angle.

The invention discloses copper paste and a preparation method and application thereof. The copper paste comprises copper powder, resin, a curing agent, a dispersing agent, a reducing copper precursor and a solvent. The reducing copper precursor is a reducing copper complex or a mixture composed of copper salt and a reducing agent; the reductive copper complex is composed of copper ions and reductive ligands; the reducing ligand is selected from one or more than two of organic acid and phenolic compounds containing reducing groups; the reducing agent is selected from one or more than two of organic acid containing reducing groups and phenolic compounds. According to the copper slurry disclosed by the invention, the reducing copper precursor is introduced and is dissolved in the organic phase, and uniform and fine copper nanoparticles are generated in situ in the curing process and are embedded among resin or copper powder particles, so that a conductive path is increased, a tunneling potential barrier among the resin is reduced, and the conductivity is increased.

The application discloses a method for controlling low-temperature stress of tomatoes based on nano copper sulfide, and belongs to the technical field of novel cold resistance. The application prepares copper sulfide nanoparticles, and uses the copper sulfide nanoparticles to promote the low-temperature stress resistance of tomatoes. The application controls the low-temperature stress of tomatoes by foliar application of CuS NPs, so that the plant height of the tomatoes under low-temperature stress is increased by 14.96%, and the fresh weight of the aboveground part and the fresh weight of the underground part are respectively increased by 32.21% and 64.37%. The prepared copper sulfide nanoparticles are superior to conventional copper-based materials, sulfur-based materials, traditional cold resistance agents and other sulfur-based nanoparticles in effect.

To provide an electrochromic material and a method for producing the same, which are used in a coating material that exhibits reversible color change between black and transparent, as well as a coating material and a mixed coating material containing the electrochromic material and methods for producing the same, a color-variable electrode, and an electrochromic device. [Solution] A black electrochromic material that reversibly changes color between black and transparent through an electrochemical redox reaction, comprising one or more nanoparticles selected from the group consisting of copper oxide nanoparticles that are heat-treated products of basic copper carbonate, titanium oxide nanoparticles, titanium nitride nanoparticles, nickel oxide nanoparticles, nickel hydroxide nanoparticles, zirconium oxide nanoparticles, and metallic iridium nanoparticles.

The invention relates to copper nanoparticles and a preparation method and application thereof, the copper nanoparticles are obtained by dispersing a copper source, a dispersing agent and a reducing agent as raw materials in n-butyl alcohol and performing redox reaction through a reflux heating method, and the n-butyl alcohol is used as a solvent and the reducing agent. The method for modifying the copper nanoparticles by taking the n-butyl alcohol as the reducing agent is provided for the first time, the preparation method is simple, the requirement is low, and the process is green and environment-friendly. The prepared n-butyl alcohol modified copper nanoparticles can be applied to preparation of an electrochemical luminescence (ECL) immunosensor, and the detection sensitivity is high.

The invention provides a method for rapidly detecting pesticide residues in fruits and vegetables, and belongs to the field of pesticide analysis and detection. The method comprises the following steps: mixing a copper nanoparticle / reduced graphene oxide / chitosan composite material, acetylcholin esterase, choline oxidase and a cross-linking agent glutaraldehyde solution for reaction to obtain a double-enzyme functionalized nano composite material; dispensing a chitosan solution on the surface of a working electrode of a screen-printed electrode, drying to form a film, and covalently modifying the surface of the electrode with the bienzyme functionalized nano composite material through a cross-linking agent glutaraldehyde to obtain a sensing electrode; according to the method, acetylcholine is taken as a substrate, a sensing electrode is used, a chronoamperometry is adopted, inhibition ratios of pesticide standard substance solutions with different known concentrations to electrode response current are detected, and a standard curve between the pesticide concentration and the current inhibition ratio is established; and calculating the pesticide residue concentration in the fruit and vegetable sample to be detected according to the current inhibition ratio of the liquid to be detected and the standard curve. Therefore, the sensitivity and accuracy of pesticide residue detection in fruits and vegetables are improved.