A production method for a refined product of a metal nanoparticle-containing composition, including causing a metal nanoparticle-containing composition to pass in a liquid state from one side to the other side of a porous polyimide and/or polyamide-imide membrane having interconnection pores with differential pressure, and a production method for a refined product of a metal nanoparticle dispersion liquid, including causing a metal nanoparticle dispersion liquid to pass from one side to the other side of a porous polyimide and/or polyamide-imide membrane having interconnection pores with differential pressure.

The present application relates to hollow metal nano particles.

A composite material of Angstrom-scale nanowire arrays in zeolite and its fabrication methods are provided. The zeolite can be prepared by a hydrothermal method and the Angstrom-scale nanowire arrays can be prepared by using zeolite as a template. The zeolite can have porous structures with an average pore size of 0.74 nm and the plurality of nanowires can have an average diameter smaller than 1 nm and can be dispersed on internal or external surfaces of the porous structures. The Angstrom-scale nanowire arrays can be made of aluminum (Al), gallium (Ga), zinc (Zn), or carbon (C). A composite material of the Angstrom-scale aluminum (Al), gallium (Ga), or zinc (Zn) nanowire arrays in zeolite can exhibit characteristics of one-dimensional (1D) superconductor.

Provided are a boron-nitride nanoplatelet(s) (BNNP)/metal nanocomposite powder and a preparing method thereof, the BNNP/metal nanocomposite powder including a base metal and BNNP dispersed in the base metal and configured to serve as a reinforcement of the base metal, wherein the BNNP are interposed between metal particles of the base metal in the form of a thin film of a plurality of layers and combined with the metal particles, and an amount of the BNNP in the base metal is greater than 0 vol % and less than 90 vol %.

Provided is a method for producing metal nanoparticles, which enables metal nanoparticles to be more conveniently produced.

The method for producing metal nanoparticles includes spraying and drying a mixture to form metal nanoparticles, the mixture containing a metal salt and at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms.

Provided are a boron-nitride nanoplatelet(s) (BNNP)/metal nanocomposite powder and a preparing method thereof, the BNNP/metal nanocomposite powder including a base metal and BNNP dispersed in the base metal and configured to serve as a reinforcement of the base metal, wherein the BNNP are interposed between metal particles of the base metal in the form of a thin film of a plurality of layers and combined with the metal particles, and an amount of the BNNP in the base metal is greater than 0 vol % and less than 90 vol %.

A first subject of the present invention has an antiviral formulation with metallic copper particles in an unoxidized form and having a median particle diameter inferior or equal to 200 nm, graphene oxide or reduced graphene oxide, and a bonding matrix material. A second subject of the invention has an antiviral filtering material with a layer of textile and at least one layer of an antiviral coating comprising metallic copper particles in an unoxidized form and having a median particle diameter inferior or equal to 200 nm, graphene oxide or reduced graphene oxide, and a bonding matrix into which both metallic copper particles and graphene oxide or reduced graphene oxide are anchored. The invention also concerns methods of preparation of the antiviral formulation and of the antiviral filtering material. Finally, the invention includes an antiviral face mask with a layer of textile coated with the antiviral formulation.

A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e))M.sub.aB.sub.bP.sub.cSi.sub.dC.sub.e, wherein X represents Co and/or Ni; X2 represents at least one selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from the group consisting of Nb, Hf, Zr, Zr, Ta, Mo, W, and V; 0.020a0.14, 0.020<b0.20, 0<c0.15, 0d0.060, 0e0.040, 0, 0, and 0+0.50 are satisfied, and wherein the soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance; and the surface of each of the soft magnetic alloy particles is covered with a coating portion including a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.

A composite material of Angstrom-scale nanowire arrays in zeolite and its fabrication methods are provided. The zeolite can be prepared by a hydrothermal method and the Angstrom-scale nanowire arrays can be prepared by using zeolite as a template. The zeolite can have porous structures with an average pore size of 0.74 nm and the plurality of nanowires can have an average diameter smaller than 1 nm and can be dispersed on internal or external surfaces of the porous structures. The Angstrom-scale nanowire arrays can be made of aluminum (Al), gallium (Ga), zinc (Zn), or carbon (C). A composite material of the Angstrom-scale aluminum (Al), gallium (Ga), or zinc (Zn) nanowire arrays in zeolite can exhibit characteristics of one-dimensional (1D) superconductor.

Provided is a method for producing metal nanoparticles, which enables metal nanoparticles to be more conveniently produced. The method for producing metal nanoparticles includes spraying and drying a mixture to form metal nanoparticles, the mixture containing a metal salt and at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms.