Alloy nanoparticles loaded network structure and method for producing alloy nanoparticles loaded porous body

Patent metadata

Field	Value
Publication number	US-12157112-B2
Application number	US-201917608405-A
Country	US
Kind code	B2
Filing date	May 24, 2019
Priority date	May 24, 2019
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A protein template is added to a solution in which metal ions of iron and copper are dissolved to introduce the metal ions into the protein template; the protein template is separated from metal ions that have not been incorporated in the protein template; the metal ions that have been incorporated in the protein template are reduced to obtain a protein containing alloy nanoparticles of iron and copper; a sol or gel in which a co-continuous body is dispersed is frozen; the frozen sol or gel is dried in a vacuum to obtain a porous body; the porous body is allowed to support the alloy nanoparticle containing protein; and the protein is removed.

First claim

The invention claimed is:

1. A method for manufacturing an alloy nanoparticle-supporting porous body, comprising the steps of:
freezing a sol or gel in which a co-continuous body is dispersed;
drying the frozen sol or gel in a vacuum to obtain a porous body;
allowing the porous body to support an alloy nanoparticle-containing protein template, wherein a weight ratio of the protein template to the porous body is a weight ratio of 10% to 30%; and
subjecting the porous body to a heat treatment to remove the protein template.

2. The method for manufacturing an alloy nanoparticle-supporting porous body according to claim 1 , comprising the step of:
allowing a bacterium to generate the sol or gel.

3. The method for manufacturing an alloy nanoparticle-supporting porous body according to claim 1 , comprising the steps of:
adding a protein template to a solution in which metal ions of iron and copper are dissolved to introduce the metal ions into the protein template;
separating the protein template from metal ions that have not been incorporated in the protein template; and
reducing the metal ions that have been incorporated in the protein template to obtain the alloy nanoparticle-containing protein template.

4. The method for manufacturing an alloy nanoparticle-supporting porous body according to claim 3 ,
wherein the protein template is constituted with any of a ferritin protein, a heat shock protein, a DpsA protein, a capsid protein, or a modified product obtained by modifying an amino acid sequence thereof.

5. The method for manufacturing an alloy nanoparticle-supporting porous body according to claim 2 , comprising the steps of:
adding a protein template to a solution in which metal ions of iron and copper are dissolved to introduce the metal ions into the protein template;
separating the protein template from metal ions that have not been incorporated in the protein template; and
reducing the metal ions that have been incorporated in the protein template to obtain the alloy nanoparticle-containing protein template.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Iwata Mikayo
• Nohara Masaya
• Taguchi Hiroaki
• Komatsu Takeshi

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J35/58

  Fabrics or filaments · CPC title

• H01M4/8803

  Supports for the deposition of the catalytic active composition (H01M4/90 takes precedence) · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title