Method for production of indium nanoparticles

Patent metadata

Field	Value
Publication number	US-9969006-B2
Application number	US-201615370857-A
Country	US
Kind code	B2
Filing date	Dec 6, 2016
Priority date	Jul 9, 2014
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The present disclosure is directed to methods for producing indium nanoparticles. The methods comprise dissolving indium chloride in a solution that includes a solvent and a surfactant, adding a reducing agent to the reaction mixture to form an agglomerate of In nanoparticles, and exposing the reaction mixture to a gas including oxygen to disperse the agglomerate into a plurality of individual indium nanoparticles.

First claim

What is claimed is:

1. A method for producing indium (In) nanoparticles comprising:
dissolving indium chloride in a solution including a solvent and a surfactant to form a reaction mixture;
adding a reducing agent to the reaction mixture to form an agglomerate of In nanoparticles within the reaction mixture;
exposing the reaction mixture to a gas including oxygen to disperse the agglomerate into a plurality of individual In nanoparticles; and
stirring the reaction mixture while the reaction mixture is exposed to the gas including oxygen.

2. The method in accordance with claim 1 , wherein the solvent is tetrahydrofuran.

3. The method in accordance with claim 2 , further comprising providing about 60 mL of tetrahydrofuran per gram of indium chloride dissolved in the solution.

4. The method in accordance with claim 1 , wherein the surfactant is trioctylphosphine.

5. The method in accordance with claim 4 , further comprising providing about 30 mL of trioctylphosphine per gram of indium chloride dissolved in the solution.

6. The method in accordance with claim 1 , wherein adding a reducing agent to the reaction mixture includes adding superhydride solution to the reaction mixture.

7. The method in accordance with claim 6 , wherein adding superhydride solution to the reaction mixture includes adding about 25 mL of superhydride solution per gram of indium chloride.

8. The method in accordance with claim 1 , wherein exposing the reaction mixture to a gas including oxygen includes exposing the reaction mixture to air.

9. The method in accordance with claim 8 , wherein stirring the reaction mixture further comprises stirring the reaction mixture for a duration ranging from about two hours to about four hours while the reaction; mixture is exposed to the air.

10. The method in accordance with claim 1 , further comprising separating the plurality of individual In nanoparticles from the reaction mixture.

11. The method in accordance with claim 10 , wherein separating the plurality of individual En nanoparticles from the reaction mixture includes separating the plurality of individual In nanoparticles from the reaction mixture by centrifugation.

12. The method in accordance with claim 11 , further comprising rinsing the separated plurality of individual In nanoparticles with a rinse solvent.

13. The method in accordance with claim 12 , wherein rinsing the separated plurality of individual In nanoparticles with a rinse solvent includes rinsing the separated plurality of individual In nanoparticles with ethanol.

14. The method in accordance with claim 13 , further comprising rinsing the separated plurality of individual In nanoparticles with the rinse solvent a second time.

15. The method in accordance with claim 1 , wherein dissolving indium chloride in the solution includes dissolving indium chloride in the solution at about room temperature.

16. The method in accordance with claim 1 , wherein each individual In nanoparticle of the plurality of individual In nanoparticles has a particle size of about 2 nm.

17. A method for producing indium (In) nanoparticles comprising:
dissolving indium chloride in a solution including tetrahydrofuran and trioctylphosphine to form a reaction mixture;
adding superhydride solution to the reaction mixture to form an agglomerate of In nanoparticles within the reaction mixture; and
exposing the reaction mixture to air to disperse the agglomerate into plurality of individual In nanoparticles.

18. The method of claim 17 , further comprising providing about 60 mL of tetrahydrofuran per gram of indium chloride dissolved in the solution.

19. The method of claim 17 , further comprising providing about 30 mL of trioctylphosphine per gram of indium chloride dissolved in the solution.

20. The method of claim 17 , further comprising separating the plurality of individual In nanoparticles from the reaction mixture by centrifugation and rinsing the separated plurality of individual In nanoparticles with ethanol.

Assignees

• Honda Motor Co Ltd

Inventors

• Chou Nam Hawn

Classifications

• B01J37/009

  Preparation by separation, e.g. by filtration, decantation, screening · CPC title

• B22F1/0044

  Operations & Transport · mapped topic

• B22F2201/50

  air · CPC title

• B01J23/08

  of gallium, indium or thallium · CPC title

• B22F9/24 Primary

  starting from liquid metal compounds, e.g. solutions · CPC title