Method for making activated carbon-supported transition metal-based nanoparticles

Patent metadata

Field	Value
Publication number	US-10011503-B2
Application number	US-201414337621-A
Country	US
Kind code	B2
Filing date	Jul 22, 2014
Priority date	Jul 22, 2014
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

Methods for making activated carbon-supported transition metal-based nanoparticles include (a) impregnated activated carbon with at least one transition metal-containing compound, and (b) heating the impregnated activated carbon at a temperature and for a time sufficient to carbothermally reduce the transition metal-containing compound. Also disclosed are activated carbon-supported transition metal-based nanoparticles produced by such methods. Further disclosed are methods for treating water and waste streams that include contacting the water or waste streams with the activated carbon-supported transition metal-based nanoparticles.

First claim

What is claimed is:

1. A method for making activated carbon honeycomb-supported transition metal-based nanoparticles, the method comprising:
impregnating an activated carbon honeycomb with at least one transition metal-containing compound;
heating the impregnated activated carbon honeycomb in an inert atmosphere at a temperature and for a time sufficient for the activated carbon honeycomb to reduce the at least one transition metal-containing compound; and
treating the activated carbon honeycomb-supported transition metal-based nanoparticles with acid;
wherein the activated carbon honeycomb-supported transition metal-based nanoparticles are present in a concentration ranging from about 5% to about 40% by weight.

2. The method of claim 1 , wherein the at least one transition metal is chosen from iron, zinc, titanium, nickel, copper, zirconium, hafnium, vanadium, niobium, cobalt, manganese, platinum, aluminum, barium, bismuth, and combinations thereof.

3. The method of claim 1 , wherein the at least one transition metal-containing compound is chosen from transition metal salts and oxides, and combinations thereof.

4. The method of claim 1 , wherein the at least one transition metal-containing compound is chosen from FeC 2 O 4 , FeCO 3 , Fe(NO 3 ) 3 , Fe 2 O 3 , Fe 3 O 4 , FeCl 3 , Zr(SO 4 ) 2 , ZrO(NO 3 ) 2 , MnO 2 hydrates thereof, and combinations thereof.

5. The method of claim 1 , wherein the at least one transition metal-containing compound is mixed with at least one solvent to form a feedstock mixture.

6. The method of claim 5 , wherein the at least one solvent is chosen from water, water-miscible solvents, organic solvents, and combinations thereof.

7. The method of claim 5 , wherein the feedstock mixture is an aqueous solution comprising from about 10% to about 90% by weight of at least one transition metal-containing compound.

8. The method of claim 5 , wherein the activated carbon honeycomb is impregnated with the at least one transition metal-containing compound by immersing the activated carbon honeycomb into the feedstock mixture with an optional soaking time ranging from about 5 to about 60 minutes.

9. The method of claim 1 , further comprising drying the impregnated activated carbon honeycomb at a temperature ranging from about 50° C. to about 200° C. and for a time ranging from about 1 hour to about 24 hours.

Assignees

• Corning Inc

Inventors

• Addiego William Peter
• Johnson Benedict Yorke
• Wang Lingyan

Classifications

• B01J20/3236

  containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts · CPC title

• B01J20/20

  comprising free carbon; comprising carbon obtained by carbonising processes · CPC title

• C02F2101/103

  Arsenic compounds · CPC title

• B01J20/28007

  with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like (carbon nanostructures B01J20/205) · CPC title

• B01J20/3078

  Thermal treatment, e.g. calcining or pyrolizing · CPC title