Adsorbent materials and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-10099072-B2
Application number	US-201615378128-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Dec 15, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

Disclosed are adsorbent materials that comprise a porous material having a continuous silica phase coated with a carbon layer, and a water-insoluble precipitate comprising a metal cation and an anion disposed substantially evenly throughout the adsorbent material. In some examples, the plurality of pores can have an average characteristic dimension of from 0.1 Å to 100 Å. The water-insoluble precipitate can be formed in the plurality of pores of the porous material by contacting the porous material with a first aqueous solution comprising a metal cation; and contacting the porous material with a second aqueous solution comprising an anion; wherein the metal cation and the anion combine to form the water-insoluble precipitate in the plurality of pores of the porous material, thereby forming the adsorbent material.

First claim

What is claimed is:

1. A method of forming an adsorbent material, comprising:
contacting a porous material with a first aqueous solution comprising a metal cation;
wherein the porous material comprises a continuous silica phase coated with a layer comprising carbon and is permeated by a plurality of pores, wherein the plurality of pores have an average characteristic dimension of from 0.1 Å to 100 Å; and
contacting the porous material with a second aqueous solution comprising an anion;
wherein the metal cation and the anion combine to form a water-insoluble precipitate in the plurality of pores of the porous material, thereby forming the adsorbent material.

2. The method of claim 1 , further comprising washing the adsorbent material to substantially remove a residual water-soluble ion.

3. The method of claim 1 , wherein the porous material is contacted with the first aqueous solution before being contacted with the second aqueous solution.

4. The method of claim 1 , wherein the porous material is contacted with the first aqueous solution, the second aqueous solution, or a combination thereof for an amount of time from greater than 0 to 48 hours.

5. The method of claim 1 , wherein the anion comprises chloride, bromide, iodide, fluoride, sulfate, sulfide, hydroxide, phosphate, carbonate, sulfite, oxide, silicate, chromate, or a combination thereof.

6. The method of claim 1 , wherein the concentration of the water-insoluble precipitate in the adsorbent material is from 10 wt. % to 20 wt. % of the adsorbent material.

7. The method of claim 1 , wherein the water-insoluble precipitate comprises magnesium phosphate, magnesium carbonate, zinc phosphate, copper carbonate, copper phosphate, zinc carbonate, or combinations thereof.

8. The method of claim 1 , wherein the continuous silica phase comprises a mesoporous silica and the carbon layer comprises carbonized alcohol.

9. The method of claim 1 , wherein the porous material has a BET surface area of from 500 to 1000 m 2 /g.

10. The method of claim 1 , wherein the porous material has a pore volume of from 0.3 to 1.2 cm 3 /g.

11. The method of claim 1 , wherein the adsorbent material has a BET surface area of from 100 to 700 m 2 /g.

12. The method of claim 1 , wherein the adsorbent material has a pore volume of from 0.1 to 0.8 cm 3 /g.

13. The method of claim 1 , wherein the adsorbent material has an adsorption capacity for NH 3 gas of from 0.3 to 6 mol of NH 3 gas per kg of adsorbent material.

14. The method of claim 1 , wherein the adsorbent material has an adsorption capacity for SO 2 gas of from 0.05 to 0.7 mol SO 2 gas per kg of adsorbent material.

15. An adsorbent material, comprising:
a porous material comprising a continuous silica phase coated with a layer comprising carbon and permeated by a plurality of pores;
wherein the plurality of pores have an average characteristic dimension of from 0.1 Å to 100 Å;
wherein a water-insoluble precipitate is disposed substantially evenly throughout the adsorbent material within the plurality of pores; and
wherein the water-insoluble precipitate comprises magnesium phosphate, magnesium carbonate, zinc phosphate, copper carbonate, copper phosphate, zinc carbonate, or combinations thereof.

16. A filter for removing a gas from a gas stream, comprising the adsorbent material of claim 15 .

17. A respirator, said respirator comprising the filter of claim 16 .

18. A gas mask, said gas mask comprising the filter of claim 16 .

19. A human protection device, comprising a fabric and the adsorbent material of claim 15 .

Assignees

• Univ Vanderbilt

Inventors

• Levan Jr Martin Douglas
• Barpaga Dushyant

Classifications

• A61L31/022

  Metals or alloys · CPC title

• A62B23/025 Primary

  the filter having substantially the shape of a mask (surgical face masks A41D13/11) · CPC title

• A61L31/146

  Porous materials, e.g. foams or sponges · CPC title

• A61L31/08

  Materials for coatings · CPC title

• B01J20/10

  comprising silica or silicate · CPC title