Water decontamination adsorbent and method of making

Patent metadata

Field	Value
Publication number	US-12358814-B1
Application number	US-202519077093-A
Country	US
Kind code	B1
Filing date	Mar 12, 2025
Priority date	Nov 20, 2024
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A method of water decontamination includes contacting a MoO3@Al2O3—MgO nanocomposite material with an aqueous solution to form a reaction mixture. The aqueous solution includes one or more contaminants. The method further includes mixing the reaction mixture and collecting a filtrate. The filtrate has fewer of the one or more contaminants than the aqueous solution. The MoO3 content of the MoO3@Al2O3—MgO nanocomposite material ranges from 1 wt. % to 20 wt. % of the total weight of the MoO3@Al2O3—MgO nanocomposite material. The MoO3@Al2O3—MgO nanocomposite material has a surface area of greater than or equal to 50 m2/g.

First claim

The invention claimed is:

1. A method for removing pollutants from water, comprising:
contacting a MoO 3 @Al 2 O 3 —MgO nanocomposite material with an aqueous solution to form a reaction mixture comprising the MoO 3 @Al 2 O 3 —MgO nanocomposite material and the aqueous solution;
wherein the aqueous solution comprises one or more contaminants,
mixing the reaction mixture by stirring, swirling and/or sonicating; and
collecting a filtrate,
wherein the filtrate has fewer of the one or more contaminants than the aqueous solution,
wherein the MoO 3 content of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is in a range from 1 to 20 wt. % of the total weight of the MoO 3 @Al 2 O 3 —MgO nanocomposite material, and
wherein the MoO 3 @Al 2 O 3 —MgO nanocomposite material has a surface area of greater than or equal to 50 m 2 /g.

2. The method of claim 1 , wherein the MoO 3 content of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is in a range from 3 to 12 wt. % of the total weight of the MoO 3 @Al 2 O 3 —MgO nanocomposite material.

3. The method of claim 2 , wherein the MoO 3 content of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is in a range from 5 to 10 wt. % of the total weight of the MoO 3 @Al 2 O 3 —MgO nanocomposite material.

4. The method of claim 1 , wherein the MoO 3 @Al 2 O 3 —MgO nanocomposite material has a surface area of greater than or equal to 70 m 2 /g.

5. The method of claim 4 , wherein the MoO 3 @Al 2 O 3 —MgO nanocomposite material has a surface area of greater than or equal to 100 m 2 /g.

6. The method of claim 1 , wherein the adsorption capacity of the MoO 3 @Al 2 O 3 —MgO nanocomposite material for chlortetracycline is greater than or equal to 90 mg/g.

7. The method of claim 6 , wherein the adsorption capacity of the MoO 3 @Al 2 O 3 —MgO nanocomposite material for chlortetracycline is greater than or equal to 120 mg/g.

8. The method of claim 1 , wherein the average pore diameter of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is greater than or equal to 8 angstroms.

9. The method of claim 8 , wherein the average pore diameter of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is greater than or equal to 10 angstroms.

10. The method of claim 1 , wherein the specific pore volume of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is greater than or equal to 0.300 cm 3 ·g −1 .

11. The method of claim 10 , wherein the specific pore volume of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is greater than or equal to 0.425 cm 3 ·g −1 .

12. A method for synthesizing a MoO 3 @Al 2 O 3 —MgO nanocomposite material, comprising:
adding distilled water and HNO 3 to a powder mixture of Al(NO 3 ) 3 ·9H 2 O, Mg(Ac) 2 ·4H 2 O, MoO 3 , and sucrose to form a reaction mixture;
heating the reaction mixture to a reaction temperature in a range of 150 to 200° C.;
reacting the reaction mixture at the reaction temperature until a porous carbonized product is formed;
grinding the porous carbonized product to form a ground carbonized product; and
calcining the ground carbonized product at a temperature in a range from 700 to 800° C. for a period of 2 to 4 hours to form the MoO 3 @Al 2 O 3 —MgO nanocomposite material which has a MoO 3 content of 3-10 wt % based on the total weight of the MoO 3 @Al 2 O 3 —MgO nanocomposite material.

13. The method of claim 12 , wherein the MoO 3 @Al 2 O 3 —MgO nanocomposite material has a surface area of greater than or equal to 70 m 2 /g.

14. The method of claim 13 , wherein the MoO 3 @Al 2 O 3 —MgO nanocomposite material has a surface area of greater than or equal to 100 m 2 /g.

15. The method of claim 12 , wherein the adsorption capacity of the MoO 3 @Al 2 O 3 —MgO nanocomposite material for chlortetracycline is greater than or equal to 90 mg/g.

16. The method of claim 15 , wherein the adsorption capacity of the MoO 3 @Al 2 O 3 —MgO nanocomposite material for chlortetracycline is greater than or equal to 120 mg/g.

17. The method of claim 12 , wherein the average pore diameter of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is greater than or equal to 8 angstroms.

18. The method of claim 12 , wherein the specific pore volume of the MoO 3 @Al 2 O 3 —MgO nanocomposite material is greater than or equal to 0.300 cm 3 ·g −1 .

Assignees

• Imam Mohammad Ibn Saud Islamic Univ

Inventors

• Abdulkhair Babiker Yagoub Elhadi

Classifications

• C02F1/00

  Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) · CPC title

• C02F2103/343

  from the pharmaceutical industry, e.g. containing antibiotics · CPC title

• B01J20/2808

  being less than 2 nm, i.e. micropores or nanopores · CPC title

• B01J20/041

  Oxides or hydroxides · CPC title

• B01J20/0248

  Compounds of B, Al, Ga, In, Tl (B01J20/08 takes precedence) · CPC title