15 results about "Nanometer particle" patented technology

The application discloses a method for detecting polychlorinated biphenyl by using an electrochemical aptamer sensor. x The sensor comprises a glassy carbon electrode, a surface of a detection end of the glassy carbon electrode is decorated with an electroactive nanomaterial, the electroactive nanomaterial comprises Ti3C2T 0000001 Nanosheet, a conductive polymer material is embedded in an interlayer structure of the nanosheet and forms a composite nanomaterial, and gold nanoparticles are deposited on a surface of the composite nanomaterial; a capture chain is self-assembled on the electroactive nanomaterial, a specific aptamer probe is combined on the capture chain, a DNA double-stranded structure is formed, and an electroactive label is introduced. In the application, the sensor has the advantages of wide detection range, low detection limit, strong anti-interference ability, good stability and the like, can realize specific detection of polychlorinated biphenyl, has the advantages of low cost, short time consumption, high accuracy, good adaptability and the like, and has important significance for rapid detection of polychlorinated biphenyl.

This invention discloses a dodecahedral Co-C / LDH composite electrode material loaded with bismuth nanoparticles, its preparation method, and its application. The composite material has a dodecahedron formed by a Co-C amorphous carbon layer as the core, an outer NiCoAl-LDH layer, and a surface loaded with Bi nanoparticles, forming a unique three-dimensional core-shell structure. Co-C / NiCoAl-LDH@Bi is assembled as the anode and AC as the cathode. The Co-C / NiCoAl-LDH@Bi / / AC device improves the Cl... ‑ Storage capacity, electrochemical reaction kinetics, and long-term cycling stability expand the application boundaries of LDH materials in the field of high-performance CDI anodes, providing high-performance material support for the practical application of CDI technology in seawater desalination. It is expected to promote the development and implementation of low-cost, large-scale seawater desalination systems and has important industrial application prospects and environmental value.

The application relates to the technical field of metal recovery, in particular to a metal removal and recovery method for waste titanium anode plates; nanometer particles are subjected to a coating operation, cations are introduced to graft the coated nanometer particles, grafted nanometer particles are obtained, and the grafted nanometer particles are pretreated to obtain initial nanometer particles. In the application, the metal recovery of the waste titanium anode plates is realized through the synergistic effect of magnetic nanometer particle synthesis, functional modification and biological enzyme directional degradation; the surface of the nanometer particles is subjected to double-layer coating of silicon dioxide-polyacrylic acid and synergistic modification of carboxyl and amino groups, the adsorption capacity and selectivity to noble metal ions are enhanced, the noble metal ions are reduced to metal states through catalysis of an active enzyme solution, an integrated process of adsorption to degradation and then magnetic separation is formed between the noble metal ions and the functional nanometer particles, and after the titanium matrix is regenerated through pickling, high-value recovery and utilization of metal materials can be realized through smelting or powder metallurgy.

The utility model relates to a kind of nanometer conductive material dispersion devices, including shear dispersion component and cyclone separator, shear dispersion component includes vertical pipeline type high shear dispersion machine and atomization liquid supply structure, vertical pipeline type high shear dispersion machine also has the atomization mouth of intercommunication high shear dispersion cavity, atomization liquid supply structure is installed in atomization mouth, atomization liquid supply structure has modified liquid intercommunication mouth, atomization liquid supply structure is used to atomize modified liquid and input atomized liquid into high shear dispersion cavity, the material inlet of cyclone separator is interconnected with the top end discharge port of vertical pipeline type high shear dispersion machine. The integration design of vertical pipeline type high shear dispersion machine and atomization liquid supply structure in the present application realizes the synchronous processing of nanometer conductive material dispersion and surface modification, so that nanometer particles complete surface coating while disaggregating. The direct connection of cyclone separator and dispersion machine discharge port constitutes continuous processing system, avoids the material transfer link of traditional batch process, and the separation effect is better.

[Problem] To provide: a method for producing precursor fine particles, the method being improved in productivity and quality stability of ε-type ferric oxide fine particles; a method for producing ε-type ferric oxide fine particles; and precursor fine particles. [Solution] This method for producing precursor fine particles can be used for the production of ε-type ferric oxide fine particles, and is characterized by including an irradiation step in which a ferric salt in a solvent 5 is irradiated with a femtosecond pulse laser to produce precursor fine particles P each containing iron hydroxide oxide. In the irradiation step, precursor fine particles P each containing ε-type iron hydroxide oxide may be produced. In the irradiation step, the ferric salt in the solvent 5 that contains an alcohol may be irradiated with the femtosecond pulse laser.

The application relates to the technical field of medical devices, in particular to a preparation method of a delivery forceps film layer for obstetrics, which comprises the following steps: carrying out plasma immersion ion implantation and deposition treatment on the surface of a delivery forceps base body; preparing a composite coating solution, obtaining a comprehensive quality evaluation value of the solution, and judging the passability of the composite coating solution; adjusting the parameters of the composite coating solution based on the nanometer particle stability index of the solution after standing for a preset time length; depositing the qualified composite coating solution on the surface of the base body through an atomization spraying mode; carrying out programmed curing on the deposited film layer, and carrying out micro-nano texture processing and hydrophilic modification on the surface of the film layer, so that the preparation of the film layer is completed; obtaining a film layer performance evaluation value, and judging the passability of the film layer preparation based on the comparison result of the film layer performance evaluation value and a preset performance evaluation value. The interface bonding force of the surface of the base body and the surface of the film layer is enhanced, so that the mechanical durability and service life of the delivery forceps film layer are improved.

The utility model belongs to nanometer water -based paint field especially, it is simple and easy to filter structure of nanometer water -based paint, to the existing because nanometer water -based paint is before filtering, nanometer particle is easy to appear high easy reunion and the phenomenon of settlement or stratification because of surface, thereby difficultly realizes quick filtration through filter screen, even if the efficiency of coating after extrusion treatment is low when filtering, even the problem of filter plate blockage, present the following scheme, including two support plates, be provided with filter frame between two support plates, the inside fixed mounting of filter frame has two filter screens, the inner wall bottom side fixed setting of filter frame has the flow guide block corresponding with two filter screens. The utility model is in use, is favorable to the nanometer water -based paint in stirring frame is stirred to be even, to enhance the dispersity of coating, improve the coating quality before filtering, avoid the phenomenon that nanometer particle still appears high easy reunion and the settlement or stratification when filtering, is favorable to improve subsequent quick filtration.

The utility model discloses a kind of anti-glare glass mounting structures for exhibition hall, including stand, the both sides of stand are fixedly connected with crossbeam;Wherein, stand is fixedly connected with wall body, the inside of crossbeam is equipped with abutting member, abutting member and the inside surface of glass abut;Outer frame, outer frame is connected with crossbeam, the outside surface of glass and the inside surface of outer frame abut, glass is located in the space surrounded by stand, outer frame and crossbeam;Wherein, glass is multilayer toughened glass, reflection plate is equipped between multilayer toughened glass, the surface of toughened glass is coated with nano-particle material, the utility model is set up reflection plate in multilayer toughened glass middle and most light is reflected, and by coating a layer of nano-particle material on the surface of toughened glass, light is dispersed, so as to play the role of anti-glare;In addition, by the combination of crossbeam, stand and outer frame, toughened glass is surrounded in it, simplify installation structure, facilitate installation and maintenance.

This invention discloses a divalent rare earth-graphyne composite material, its preparation method, and its application in thermocatalytic ammonia production, belonging to the field of catalyst materials technology. The divalent rare earth-graphyne composite material comprises rare earth ions, iodide ions, and graphyne material. The rare earth ions are selected from at least one divalent ion of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium. The rare earth ions and iodide ions exist on the surface of the graphyne material in the form of nanoparticles. This divalent rare earth-graphyne composite material achieves thermocatalytic ammonia production under mild conditions through the interaction of rare earth nanoparticles and oxygen-containing functional groups on the graphyne surface, and is expected to become a new generation of high-performance thermocatalytic ammonia production catalyst.

This invention discloses a controllable endothermic VO2@MXene / epoxy resin anti-corrosion composite coating and its preparation method. The invention first prepares a single-layer Ti3C2T x MXene; then polydopamine (PDA) was used as a binder for monolayer Ti3C2T. x The MXene nanosheets in MXene are coated, which not only improves the mechanical stability of MXene but also provides a large number of "anchor points" as binders to load M-phase VO2 nanoparticles onto Ti3C2T. x VO2@Ti3C2T with controllable light absorption and photothermal conversion was prepared on the MXene surface. x MXene nanosheets; finally, hyperbranched amide compounds, bisphenol A diglycidyl ether, and VO2@Ti3C2T were added. x A VO2@MXene / epoxy resin anti-corrosion composite coating was prepared by uniformly mixing MXene nanosheets. Experimental results show that the controllable endothermic VO2@MXene / epoxy resin anti-corrosion composite coating prepared by this invention has controllable photothermal properties and anti-corrosion properties. Furthermore, the synthesis method of this invention is simple and suitable for widespread application.

The application discloses a kind of nanometer particle in-situ reinforced nickel-based alloy electric arc additive manufacturing wire and its preparation method.A kind of nanometer particle in-situ reinforced nickel-based alloy electric arc additive manufacturing wire is constituted by outer layer's coating and inner layer's powder, powder is added nano-grade LaB6 particle, and the filling rate of powder is 10%-23%.The application adds LaB6 nano-particle to the powder, reacts with Ti element in nickel-based alloy wire at high temperature, generates La2O3 and TiB2 particle in-situ, these particles and matrix have good wetting relationship, uniformly distribute in alloy matrix after solidification, improve strength at the same time, promote heterogeneous nucleation of equiaxed crystal, refine grain, finally improve the strength and plasticity of alloy, in addition, La2O3 particle generated in-situ is also beneficial to the rapid formation of alloy surface Cr2O3 oxide layer during high-temperature oxidation, further improves the high-temperature oxidation resistance of alloy.