73results about "Zinc sulfides" patented technology

The invention discloses a high-performance sodium ion battery negative electrode ZnS / CoS (at) C composite material and a preparation method thereof, the material preparation method has the characteristics of definite control parameter, easy purity control, simple operation, good process repeatability and the like, and the prepared sodium ion secondary battery negative electrode material has excellent sodium ion intercalation and deintercalation capability and can be used for preparing a sodium ion secondary battery negative electrode material. The specific capacity, the cycling stability, the coulombic efficiency and the rate capability of the sodium ion secondary battery can be effectively improved, the requirements of different conditions can be met, and the application prospect is wide.

The invention relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

The invention relates to the field of nano materials and photonic crystal materials, in particular to nano particles, preparation of the nano particles and application of the nano particles in self-assembly of three-dimensional non-close-packed photonic crystals. The nanoparticles can be self-assembled into a three-dimensional non-close-packed photonic crystal in a concentration range of 1 wt%-60 wt%. According to the invention, the problem that the self-assembly of the three-dimensional non-close-packed colloid photonic crystal is difficult to realize at low concentration at present is solved. By adjusting the mass fraction of the particles in a solution, the three-dimensional non-close-packed colloidal photonic crystal with rich colors can be formed through self-assembly, and the three-dimensional non-close-packed colloidal photonic crystal has wide application prospects in the fields of sensing, display and the like.

The application belongs to the technical field of electrochemical energy storage materials, and discloses application of a sulfide-based hollow nanobrick heterojunction anode coating material and a preparation method thereof, in particular, application of the sulfide-based hollow nanobrick heterojunction anode coating material to an aqueous zinc ion battery, wherein the sulfide-based hollow nanobrick heterojunction comprises an X metal sulfide and a Y metal sulfide, and the heterojunction is represented as XS-YS n , 0 < n < 3, X is Zn, and Y is selected from one of Sn, Co, Cu or Mo; the preparation method comprises the following steps: mixing a zinc salt and a fluoride etchant, and one of a tin salt, a cobalt salt, a copper salt or a molybdenum salt, and then performing a hydrothermal reaction to obtain a bimetal-based hollow nanobrick precursor; and then performing sulfurization calcination to obtain the XS-YS n . The sulfide-based hollow nanobrick heterojunction can effectively inhibit zinc dendrite growth and interface side reactions, thereby significantly improving the electrochemical stability of the material, and further prolonging the cycle life of the aqueous zinc ion battery.

The invention discloses a hydrothermal synthesis preparation method of ZnS hollow nanospheres, which is characterized in that zinc nitrate and thiourea are used as precursors, absolute ethyl alcohol and ethidene diamine are used as solvents, and the ZnS hollow nanospheres are directly prepared by controlling the reaction temperature, time and filling degree. The method is simple in process and low in cost, and the obtained product has application potential in photocatalysis and photoelectric device materials.

This invention discloses a method for preparing a nano-zinc sulfide composite material, comprising: (1) dissolving ammonium molybdate in deionized water, stirring evenly to form a 50 g / L solution, then sequentially adding zinc acetate and thiourea, wherein the mass ratio of ammonium molybdate to zinc acetate and thiourea is 2:1, and stirring thoroughly to obtain a mixed solution; (2) transferring the obtained mixed solution to a reaction vessel, reacting at a constant temperature of 160℃ for 12 h, and obtaining a solid powder after treatment; (3) heat-treating at 300-400℃ for 2 h to obtain the nano-zinc sulfide composite material. This invention synthesizes zinc sulfide nanomaterials with different sizes and morphologies, while molybdenum dioxide nanoparticles modify the surface of zinc sulfide. The two work synergistically to have heterogeneous structural characteristics that promote and accelerate electron transport. Using them as electrode materials for electrochemical detection of nicotine and the metabolite cotinine content in cigarettes shows potential application advantages.

The invention provides a negative active material and a preparation method thereof, a negative plate, a battery and electric equipment, and relates to the technical field of sodium ion batteries. The negative electrode active material comprises a carbon shell doped with transition metal sulfide, and the wall thickness of the carbon shell is 10-45nm. The negative electrode active material has a thin-wall hollow unique structure, the thin-wall hollow unique structure can relieve volume expansion of sulfide on one hand, the thin outer wall of the thin-wall hollow unique structure can remarkably shorten the diffusion distance of sodium ions and remarkably improve ion transmission of the sodium ions on the other hand, and the negative electrode active material can be obtained through a simple preparation process; the method has the advantages of low equipment requirement, environment friendliness and the like.

The invention relates to the technical field of zinc sulfide preparation, in particular to a micro-particle-size zinc sulfide preparation method which comprises the steps that zinc oxide powder is dispersed in O / W type microemulsion, sulfuric acid is dropwise added for reaction, and zinc sulfate microemulsion is obtained; introducing hydrogen sulfide gas into the zinc sulfate microemulsion, maintaining the reaction temperature of 25 DEG C, and continuously stirring to obtain a reaction suspension; transferring the reaction suspension to centrifugal equipment, collecting bottom precipitate, washing and drying to obtain a zinc sulfide primary product; dispersing the zinc sulfide primary product in the coating liquid, continuously stirring, then transferring into a vacuum drying oven for drying to obtain micro-particle-size zinc sulfide powder, and finally barreling by filling equipment, scanning and warehousing to obtain a finished product. The O / W type microemulsion limits the reaction in a water core through the confinement effect, the particle size of zinc sulfide is directly locked in a range equivalent to the size of the water core, and the problem that the particle size is too large due to free growth of crystals in a conventional solution reaction is fundamentally avoided.

The invention discloses a ZnO / ZnS / ZnSO4 nano composite material and a gas sensor based on the ZnO / ZnS / ZnSO4 nano composite material, a ZnO / ZnS heterojunction composite material with rough spherical morphology is prepared by adopting a two-step method, part of ZnS in the ZnO / ZnS heterojunction composite material can be converted into ZnSO4 through subsequent controllable annealing treatment, so that a ZnO / ZnS / ZnSO4 three-layer composite material is obtained, and finally the ZnO / ZnS / ZnSO4 three-layer composite material is prepared into the gas sensor. And high-performance detection of NO2 gas is realized. The prepared sensor has the characteristics of high sensitivity, good selectivity and strong stability, has relatively high response (65) to 5 ppm NO2 at a relatively low working temperature (110 DEG C), can detect nitrogen dioxide gas with extremely low concentration, and has huge potential in the aspect of developing and detecting low-concentration nitrogen dioxide gas.

This invention discloses a metal sulfide and its applications, as well as a resin composition containing the metal sulfide, relating to the field of sulfide technology. The metal sulfide of this invention is zinc sulfide, and the particle size distribution of the zinc sulfide satisfies the following relationship: 1.0 ≤ 1000 × (Dv75 - Dv25) / (Dv50). 2 ≤2.2, 3.0≤(Dv97×Dv50) / (Dv10×1000)≤12.8; where Dv10, Dv25, Dv50, Dv75, and Dv97 represent the particle size corresponding to a cumulative volume distribution percentage of 10%, 25%, 50%, 75%, and 97% for the zinc sulfide material, respectively, all in nm. By controlling the particle size distribution of the metal sulfide, the resin composition containing the metal sulfide exhibits high color stability and a low rate of change in whiteness value under alternating high and low temperature environments.

The invention belongs to the technical field of solid waste resourceful treatment and catalytic materials, and particularly relates to a method for extracting zinc from lead-zinc smelting slag to prepare a zinc sulfide photocatalyst and application. Zinc extracted from lead-zinc smelting slag is used as a zinc source to prepare zinc sulfide, and the method specifically comprises the steps that the lead-zinc smelting slag is added into a sulfuric acid solution for acid leaching treatment, then sodium sulfide is added into obtained acid leaching supernate for a reaction to obtain zinc sulfide sediment, the sediment is collected, washed and dried, and then the zinc sulfide photocatalyst is obtained. The zinc sulfide prepared through the method serves as a catalyst to be applied to photocatalytic decomposition of water to prepare hydrogen, the photocatalytic hydrogen production performance of the zinc sulfide is greatly improved compared with zinc sulfide synthesized through drugs and commercial zinc sulfide, and a new way and direction are provided for resource utilization of the lead-zinc smelting slag.

The application discloses an environment-friendly copper-gallium-chalcogenide zinc sulfide core-shell quantum dot as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a gallium source, a copper source, oleylamine and 1-dodecyl mercaptan, heating, degassing in a nitrogen environment, adding a sulfur precursor solution, reacting, obtaining a quantum dot solution, heating the quantum dot solution, adding a zinc acetate precursor solution dropwise and stirring to react, continuously heating, adding a zinc stearate precursor solution dropwise and stirring to react, water quenching after the reaction, purifying, and obtaining a copper-gallium-chalcogenide zinc sulfide core-shell quantum dot. The copper-gallium-chalcogenide zinc sulfide core-shell quantum dot material prepared by the method of the application does not add toxic heavy metal materials, is harmless to human bodies and the environment, and has the advantage of high light condensation efficiency, and can effectively solve the problems of existing quantum dot materials.

A semiconductor nanoparticle, a method for manufacturing the semiconductor nanoparticle, an ink composition including the semiconductor nanoparticle, a semiconductor nanoparticle composite including the semiconductor nanoparticle, a display device including the semiconductor nanoparticle, and an electronic device including the semiconductor nanoparticle are provided. In the semiconductor nanoparticle, a mole ratio (Ga / In) of gallium to indium is greater than or equal to about 20:1 and less than or equal to about 40:1, and the semiconductor nanoparticle has a quantum yield of greater than or equal to about 70% and less than or equal to about 100%.

The application discloses a kind of sodium ion battery composite electrode materials and preparation method thereof, belong to nanocomposite technical field.The method disclosed in the application, prepared has the sodium ion battery composite electrode material of three-dimensional microsphere structure that ultra-thin two-dimensional nanosheet vertical interweaving constitutes, and the abundant pore between nanosheet is favorable to the quick infiltration of electrolyte, promote active substance and the contact of sodium ion, also be favorable to the sodium ion of disengagement, simultaneously, double metal sulfide doping replaces part of site of ZnO lattice, improve the electron transmission rate of ZnO, and its surface oxidation-reduction reaction rate, buffer the structural damage of electrode material due to volume change of ZnO in charge-discharge process;A layer of carbon nanocage is loaded on the surface of ZnO nanosheet, the size of carbon nanocage is about 100nm, the wall thickness is about 20nm, simultaneously play the role of improving its electron and ion transmission rate, effectively improve the charge-discharge first coulomb efficiency of ZnO negative electrode material.

The invention discloses high-temperature-resistant zinc sulfide, a polymer composition and a preparation method and application of the high-temperature-resistant zinc sulfide, the high-temperature-resistant zinc sulfide comprises the following components in parts by weight: a zinc sulfide matrix, the surface of the zinc sulfide matrix is provided with a silicon dioxide-based coating layer, the content of the silicon dioxide-based coating layer is 4.0-8.0 wt%, and the content of the polymer composition is 0.1-0.5 wt%. The average particle size of the zinc sulfide matrix is 20 nm to 1000 nm. The application problem that current zinc sulfide is not resistant to high temperature can be well solved.

This invention provides a method for preparing axially periodic core-shell heterojunction nanostructures. First, Al-M nanowires with endpoints are obtained using a catalytic growth method. Then, the endpoints A1 of the Al-M nanowires are removed using alkylphosphine to obtain pure colloidal M nanowires. Next, a silver source solution is mixed with a dispersion of the pure colloidal M nanowires for an ion exchange reaction to obtain M@A2 uniform core-shell heterojunction nanowires. Finally, the M@A2 core-shell nanowires are dispersed in a solvent and subjected to heat treatment. The Rayleigh fluid instability in inorganic solids causes deformation, leading to structural evolution of the uniform core-shell heterojunction nanowires and the formation of axially periodic core-shell heterojunctions. Compared with existing technologies, this invention is the first to utilize the principle of Rayleigh fluid instability in inorganic solids to precisely synthesize axially periodic nanostructures with adjustable size and periodicity, opening a new avenue for the design and synthesis of axially periodic nanostructures.

The invention provides a preparation method of a heterogeneous transition metal chalcogenide material. The preparation method comprises a heating step, a plasma forming step and a deposition step. In the heating step, the chalcogenide solid is heated at a heating temperature to form a chalcogenide gas. In the plasma forming step, reaction gas is introduced to assist the chalcogenide gas in forming chalcogenide plasma. In the deposition step, a substrate is arranged adjacent to the chalcogenide plasma, the substrate comprises a base material and a plating layer, and the chalcogenide plasma and the plating layer are subjected to a deposition reaction at a reaction temperature and a reaction pressure to form the heterogeneous transition metal chalcogenide material with excellent optical characteristics and a surface-enhanced Raman scattering effect. Therefore, the heterogeneous transition metal chalcogenide material can be applied to a surface-enhanced Raman scattering sensor.

The invention discloses a manganese-doped wide-band-gap colloidal quantum dot and TiO2 heterojunction photoelectrode and preparation and application thereof, and belongs to the technical field of semiconductor photoelectric materials and devices. According to the photoelectrode, conductive glass serves as a substrate, a TiO2 barrier layer, a TiO2 transparent layer, a scattering layer, a Mn-doped wide-band-gap colloid quantum dot layer and a surface passivation layer are sequentially constructed, and the barrier layer inhibits charge recombination; the transparent layer and the scattering layer synergistically enhance light absorption; the quantum dot layer can broaden spectral response, remarkably prolong the service life of current carriers and promote effective separation of photo-generated excitons; the passivation layer is used for reducing the light corrosion influence; the preparation method comprises the steps of TiO2 multilayer photoelectrode preparation, quantum dot synthesis and electrophoretic deposition and passivation treatment. The photoelectrode has excellent performance in hydrogen production by photoelectrochemical decomposition of water, and the system does not contain heavy metals; compared with an undoped system, the saturation photocurrent density and the hydrogen production rate are remarkably improved, the electron life is prolonged, and a reliable technical path is provided for large-scale preparation and application in the hydrogen production field.

The invention relates to the field of sulfide technology, in particular to a metal sulfide and its application as well as a metal sulfide-containing resin composition, wherein the metal sulfide is a cobalt- and iron-containing zinc sulfide material, wherein the mass fraction of the cobalt element in the zinc sulfide material is 200 to 500 ppm, and the mass fraction of the iron element in the zinc sulfide material is 3 to 200 ppm, wherein the ratio of the zinc content in the zinc sulfide material to the pH value corresponds to the relationship of 1.2 ≤ pH-2.5×lg(WZn) ≤ 3.3, where pH represents a pH value of the zinc sulfide material, and WZn represents a zinc mass fraction in the zinc sulfide material.With this type of construction, the metal sulfide-containing resin composition exhibits high color stability and a low rate of change in whiteness after long-term storage in water, by simultaneously regulating the cobalt and iron content while appropriately limiting the ratio of the zinc content to the pH value of the metal sulfide.

Disclosed is a quantum dot production method and quantum dot that can improve EQE. The quantum dot production method of the present application is characterized by comprising a step of producing a core and a step of coating a shell on the surface of the core. The step of coating the shell is performed by mixing an acidic compound and a zinc halide compound in a shell material. The step of coating the shell is preferably divided into a first half and a second half. The shell is coated in the first half using a shell material mixed with the acidic compound but not mixed with the zinc halide compound, and the shell is coated in the second half using a shell material mixed with both the acidic compound and the zinc halide compound.

To provide a manufacturing method etc., of metal sulfide that does not require high temperature and can be manufactured under atmospheric environment.SOLUTION: A manufacturing method of metal sulfide comprises an electrolysis step of bringing an anode (11) comprising a metal element M and a cathode (12) into contact with an electrolytic solution (20) comprising a sulfur source and energizing the anode (11) and the cathode (12) to precipitate metal sulfide comprising the metal element M at least one of in the electrolytic solution (20) and on the surface of the cathode (12).SELECTED DRAWING: Figure 1

The application discloses lignin-based carbon-supported zinc sulfide and a preparation method and application thereof, and comprises the following steps: (1) dissolving a zinc salt in dimethyl sulfoxide, adding lignin and a nitrogen source, and stirring and heating until completely dissolved to obtain a precursor solution; (2) carbonizing the precursor solution under a protective gas atmosphere, wherein the carbonization temperature is 500-1200 DEG C, and then washing, drying and obtaining lignin-based carbon-supported zinc sulfide. The prepared lignin-based carbon-supported zinc sulfide material has a high specific surface area and a hierarchical porous structure, and has a high specific capacity, good rate performance and cycle stability as a negative electrode of a sodium ion battery. The method has the advantages of simple operation, low cost and the like.

This application provides a method for preparing nano-zinc sulfide powder and its product, comprising: loading sulfur powder and zinc powder into a first crucible and a second crucible respectively; placing the first crucible and the second crucible into different furnace bodies of a chemical vapor deposition (CVD) furnace; placing a ceramic deposition chamber into the deposition zone furnace body of the CVD furnace; evacuating the CVD furnace to a vacuum level less than or equal to 400 Pa; at room temperature, heating the furnace body containing the first crucible to 300-350 °C at a rate of 5-10 °C / min, heating the furnace body containing the second crucible to 550-650 °C at a rate of 20-30 °C / min, and heating the deposition zone furnace body to 580-680 °C at a rate of 25-35 °C / min; after each furnace body has been heated to the predetermined temperature and held for 8-10 hours, introducing sulfur-carrying gas into the first crucible and zinc-carrying gas into the second crucible; after the reaction is completed, directly turning off the power supply to each furnace body, cooling down, and then opening the furnace to collect the nano-zinc sulfide powder. The obtained nano zinc sulfide powder has high purity, white appearance, and uniform size.

The present application relates to the technical field of photocatalytic nanomaterials, and in particular to a ZnS photocatalytic nanomaterial, a preparation method therefor and a use thereof. The method for preparing a ZnS photocatalytic nanomaterial comprises: acquiring a mixed solution of a zinc salt of an organic acid, triethylenetetramine and a solvent; and dissolving a sulfur source in the mixed solution to obtain a reaction precursor solution, and reacting to prepare a ZnS photocatalytic nanomaterial. The ZnS nanomaterial prepared in the present application has a unique microspherical structure assembled from three-dimensional nanoparticles, a uniform size, good dispersibility, and excellent and stable photocatalytic performance. In addition, the preparation method provided by the present application is simple and convenient to operate, does not require a template, achieves rapid preparation, involves abundant sources of raw materials and low costs, is environmentally friendly, and has a broad industrial prospect.

The invention discloses a ZnS nanocrystal and a preparation method and application thereof, and the preparation method of the ZnS nanocrystal comprises the following steps: mixing a zinc source and a first solvent to obtain a first precursor solution; mixing a sulfur source and a second solvent to obtain a second precursor solution; and introducing the first precursor solution and the second precursor solution into a reaction pipeline, so that the first precursor solution and the second precursor solution are mixed in the reaction pipeline and react in a flowing state to obtain the ZnS nanocrystal. According to the preparation method for continuously and homogeneously synthesizing the high-refractive-index material ZnS (zinc sulfide), the continuous and stable reaction environment is provided by accurately controlling the reaction atmosphere, such as pressure, temperature, flow and reaction chamber environment, the mass transfer and the transfer speed of the reaction are accelerated by the micro reaction chamber, the reaction can be instantaneously and homogeneously carried out, and the reaction time is shortened. The prepared ZnS (zinc sulfide) has the advantages of uniform size distribution, controllable particle size, good batch repeatability and the like.

The invention discloses a method for regulating and controlling sulfur vacancies in sulfide, and relates to the field of functional materials. The preparation method comprises the following specific steps: S1, dissolving metal salt and a sulfur source in deionized water to obtain a mixed solution A; s2, adjusting the pH value of the mixed solution A to 2-5 by using a pH regulator, and adding a sulfur vacancy regulator into the mixed solution A to obtain a mixed solution B; and S3, carrying out a hydrothermal reaction on the mixed solution B, cooling to room temperature, and filtering, washing and drying the reacted solution to obtain the sulfide rich in sulfur vacancies. The sulfur vacancy regulator is introduced before hydrothermal treatment, the sulfide rich in sulfur vacancies can be directly prepared, the process is simple, the concentration of the sulfur vacancies in the sulfide can be directly regulated, and the prepared sulfide has good photocatalytic performance.

The application belongs to the technical field of composite material manufacturing, and discloses a millimeter-scale ZnSe array supported ZnSeZnS composite material and a chemical vapor deposition preparation method thereof, which comprises the following steps: S1, selecting a thermal decomposition type polymer polymethyl glutarimide as a template material; S2, depositing ZnSe on the surface of the template; and S4, using a thiourea vapor as a sulfur source. The application replaces the traditional ZnSexS (1-x) mixed system through a heterostructure design, enhances the mechanical properties, retains the wide infrared transmission range of ZnSe, solves the performance mutual exclusion problem of "strength-transparency", and improves the interface and process stability through a temperature adaptation strategy of template assisted localized growth and step deposition, eliminates the stress cracking risk of thick film deposition in the conventional CVD, and makes the complete coverage rate of the ZnS coating layer reach more than 98%. The residual-free peeling of the template and the precise regulation of the interface transition layer (<50nm) control the interface defect density below 10⁷ / cm², and significantly improve the interface bonding strength and long-term service stability of the material.

Provided are a semiconductor nanoparticle, a method for manufacturing the semiconductor nanoparticle, an ink composition including the semiconductor nanoparticle, a semiconductor nanoparticle composite including the semiconductor nanoparticle, a display device including the semiconductor nanoparticle, and an electronic device including the semiconductor nanoparticle. In the semiconductor nanoparticles, a molar ratio of gallium to indium (Ga: In) is greater than or equal to 20: 1 and less than or equal to 40: 1, and the semiconductor nanoparticles have a quantum yield of greater than or equal to 70% and less than or equal to 100%.

To provide a semiconductor nanoparticle exhibiting improved optical properties.SOLUTION: Provided are a semiconductor nanoparticle, a method of preparing the same, and an electronic device including the same. In the semiconductor nanoparticles, the molar ratio of gallium to indium (Ga / In) is 20 or more and 40 or less, and the semiconductor nanoparticles have a quantum yield of 70% or more and 100% or less.SELECTED DRAWING: Figure 8a

A preparation method of zinc sulfide agglomerates and zinc sulfide crystals belongs to the technical field of zinc sulfide preparation, and comprises the following steps: providing a high-purity zinc raw material and a high-purity sulfur raw material; in a closed reaction environment, gasifying the high-purity sulfur raw material by controlling the temperature to generate sulfur steam with controllable partial pressure; carrying out gas-solid reaction on the sulfur steam and the high-purity zinc raw material under the assistance of at least one energy field to generate zinc sulfide, and synchronously realizing sintering densification of the zinc sulfide to obtain a zinc sulfide sintered block; by controlling the cooling process of the reaction environment, crystal growth is carried out on the zinc sulfide agglomerate or in a designated area, and zinc sulfide crystals are obtained; by introducing sulfur steam with controllable partial pressure as a reactant and an atmosphere compensation source, the problem of unbalanced stoichiometric ratio caused by easy volatilization of sulfur element in the traditional sintering process is fundamentally solved.