Method of synthesizing a material exhibiting desired microstructure characteristics based on chemical dealloying one or more group i or group ii elements from an alloy and method of synthesizing nanocomposites

Patent metadata

Field	Value
Publication number	US-11708625-B2
Application number	US-201816052544-A
Country	US
Kind code	B2
Filing date	Aug 1, 2018
Priority date	Aug 2, 2017
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

In an embodiment, an alloy is exposed to a hydrophilic solvent at least until at least one Group I or Group II element is substantially removed so as to produce a nanomaterial that substantially includes a metal, semimetal or non-metal material and that exhibits a desired set of microstructure characteristics. The hydrophilic solvent is configured to be reactive with respect to the at least one Group I or Group II element and substantially unreactive with respect to the metal, semimetal or non-metal material. In another embodiment, an active material is infiltrated into pores of a nanoporous metal or metal oxide, after which the infiltrated nanoporous metal or metal oxide material is annealed to produce an active material-based nanocomposite material. A protective coating layer is deposited on at least part of a surface of the active material-based nanocomposite material.

First claim

The invention claimed is:

1. A method of synthesizing a nanomaterial, comprising:
exposing an alloy comprising (i) Cu and (ii) at least one Group II element selected from Ca, Be, Sr, Ba and Ra to a hydrophilic solvent at least until the at least one Group II element is at least partially removed so as to produce the nanomaterial that includes the Cu,
wherein the hydrophilic solvent comprises an aqueous solvent or polyethylene glycol, and
wherein the hydrophilic solvent is configured to be more reactive with respect to the at least one Group II element than the Cu.

2. The method of claim 1 , wherein, prior to the exposing, the at least one Group II element constitutes an atomic fraction of the alloy in a range from about 5% to about 90%.

3. The method of claim 1 , wherein the at least one Group II element includes at least the Ca.

4. The method of claim 1 , wherein the exposing further exposes the alloy to at least one catalyst, at least one free radical initiator, or a combination thereof.

5. The method of claim 1 , wherein the hydrophilic solvent comprises water, alcohol or a mixture thereof.

6. The method of claim 1 , wherein the hydrophilic solvent additionally comprises an organic solvent.

7. The method of claim 1 , wherein the hydrophilic solvent comprises an organic or inorganic salt.

8. The method of claim 1 , wherein the hydrophilic solvent comprises an acid.

9. The method of claim 1 , wherein the hydrophilic solvent comprises a surfactant.

10. The method of claim 1 , wherein the exposing exposes the hydrophilic solvent to the alloy while the hydrophilic solvent is in the form of a gas, a liquid, or a combination thereof.

11. The method of claim 1 ,
wherein the nanomaterial exhibits a set of microstructure characteristics that include the presence of nanopores, nanoflowers, nanoflakes, dendrites, nanowires, nanowhiskers, nanostrips, nanotubes and/or microparticles, microstructures having needle-liked shapes or rod-like shapes, or any combination thereof.

12. The method of claim 1 , wherein the alloy is arranged as a powder prior to being exposed to the hydrophilic solvent.

13. The method of claim 1 , further comprising:
depositing a coating or shell on a surface of the nanomaterial.

14. The method of claim 1 , further comprising:
chemically or electrochemically reducing the nanomaterial to a metallic form.

15. The method of claim 14 , further comprising:
depositing a coating or shell on a surface of the nanomaterial to protect against a change in shape or form of the nanomaterial during a chemical or electrochemical reduction process.

Assignees

• Sila Nanotechnologies Inc
• Georgia Tech Res Inst

Inventors

• Yushin Gleb
• Turcheniuk Kostiantyn
• Benson James

Classifications

• C22C3/005 Primary

  Separation of the constituents of alloys · CPC title

• C22B5/14

  fluidised material · CPC title

• B82Y30/00

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

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title