10results about "Zinc sulfides" patented technology

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 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.

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 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.

The application provides vulcanized zinc special for glass fiber reinforced polyolefin composite materials and a preparation method and application thereof. The vulcanized zinc contains copper elements and manganese elements, the mass content of the copper elements in the vulcanized zinc is 5-25 ppm, the mass content of the manganese elements in the vulcanized zinc is 10-50 ppm, and the mass content of zinc in the vulcanized zinc and the D50 particle size of the vulcanized zinc satisfy the following relationship: 15<=W / (D zn / (D znS 0.3 ) <=23. By synergistically regulating the zinc content, particle size, and the content of doped copper elements and manganese elements in the vulcanized zinc, the mechanical properties, antistatic property, and wear resistance of the glass fiber reinforced polyolefin composite materials are significantly improved.

The application relates to the technical field of semiconductor nanomaterials, and in particular to a surface pre-passivation method of indium phosphide quantum dots and a preparation method of core-shell structure quantum dots of the indium phosphide quantum dots. − F − ions generated by hydrolysis under reaction conditions, specifically bind with surface uncoordinated indium sites (dangling bonds) to form In-F bonds, effectively solving the indium defects that cannot be solved by traditional cation passivation strategies. The pre-passivation treatment creates a clean, low-defect InP core surface, reducing the interface defects generated by interface lattice mismatch and heterogeneous nucleation during the subsequent ZnSe / ZnS shell epitaxial growth, and the photoluminescence quantum yield of the prepared InP / ZnSe / ZnS core-shell quantum dots is significantly improved.

The application belongs to the field of photocatalytic materials, and provides a preparation method of pink ZnS nanomaterial with high catalytic hydrogen production performance under ultraviolet visible light, which comprises the following steps: dissolving zinc salt and thiourea in a mixed solvent, uniformly mixing, adding polyvinylpyrrolidone, uniformly mixing, heating to 120 DEG C-180 DEG C to perform hydrothermal reaction, and obtaining a solid powder; washing and drying the solid powder to obtain the pink ZnS nanomaterial. The ZnS nanomaterial is synthesized by using zinc nitrate hexahydrate and thiourea, visible light absorption is enhanced, and carrier separation is improved, and the ZnS exhibits excellent photocatalytic hydrogen evolution activity and cycle stability under ultraviolet visible light irradiation.

The application provides a heterojunction-induced defect dual-phase heterostructure composite material and a preparation method and application in a battery thereof. The application prepares a heterojunction-induced defect dual-phase heterostructure NiS@ZnS / C nanosphere composite material through a simple two-step MOFs derivation method combined with a sulfuration and calcination process, wherein the dual-phase metal sulfides are NiS and ZnS respectively and are encapsulated in a carbon layer. The heterojunction interface between different crystals can induce an internal electric field to accelerate ion diffusion kinetics, improve the conductivity and provide abundant reaction sites for sodium energy storage. The application has high reversible capacity, high specific capacity, stable cycle performance and robust rate performance.

The present invention relates to Zinc chalcogenides core-shell nanoparticles having specific light absorbing properties, in particular light filtering material comprising said Zinc chalcogenides core-shell nanoparticles.

This invention discloses a method for preparing a ZnO@ZnS core-shell structured nanocomposite material with strong ultraviolet emission properties. To minimize visible light interference and enhance the ultraviolet exciton emission of ZnO, ZnS is used to modify the ZnO surface to construct a core-shell structured composite material. This effectively passivates ZnO surface defect states and suppresses / isolates surface adsorbates. Simultaneously, the wider band gap of the ZnS shell localizes ZnO excitons, preventing them from diffusing to non-radiative recombination centers, thereby improving exciton radiative recombination efficiency and significantly enhancing ultraviolet exciton luminescence intensity. The ZnO@ZnS core-shell structured nanocomposite material prepared by this invention exhibits good crystallinity and strong ultraviolet luminescence properties, making it suitable for high-performance ultraviolet optoelectronic devices. This invention has advantages such as simple preparation process, good stability, short cycle time, and environmental friendliness.