Graphene Oxide/Magnesium Oxide Nanocomposites as Superior Sorbents for Methylene Blue Removal from Aqueous Solutions

Patent metadata

Field	Value
Publication number	US-2017369333-A1
Application number	US-201715630652-A
Country	US
Kind code	A1
Filing date	Jun 22, 2017
Priority date	Jun 23, 2016
Publication date	Dec 28, 2017
Grant date	—

Abstract

The present invention includes a composition, method of making and method of using a composite for the removal of waste from a wastewater or a waste stream wherein the composite comprises of graphene oxide and magnesium oxide nanoparticles at a ratio of 10:1 to 1:10 weight to weight.

First claim

What is claimed is:

1 . A composition for the removal of waste from a wastewater or a waste stream comprising:
a composite comprising graphene oxide and magnesium oxide nanoparticles at a ratio of 10:1 to 1:10 weight to weight.

2 . The composition of claim 1 , wherein the composition is a nanocomposite.

3 . The composition of claim 1 , wherein the composite settles in aqueous solutions.

4 . The composition of claim 1 , wherein the composite removes organic molecules from water.

5 . The composition of claim 1 , wherein the composite is formed by sonication of a solution of water comprising graphene oxide and magnesium oxide.

6 . The composition of claim 1 , wherein the composite is impregnated in or on a substrate.

7 . The composition of claim 1 , wherein the composite is graphene oxide and magnesium oxide nanoparticles and has a ratio of 3:1, 1:1, and 1:3 weight to weight.

8 . The composition of claim 1 , wherein the composite is graphene oxide and magnesium oxide nanoparticles and has a ratio of 4:1, 1:1, and 1:4 weight to weight.

9 . The composition of claim 1 , wherein the composite is graphene oxide and magnesium oxide nanoparticles and has a ratio of 5:1 to 1:5.

10 . A method of removing organic molecules from wastewater or a waste stream in need of removal; and
contacting the wastewater or waste stream with a composite of graphene oxide and magnesium oxide nanoparticles for an amount of time sufficient for the organic molecules to attach to the nanoparticles; and separating the nanoparticles from the water.

11 . The method of claim 10 , wherein the water is contacted with the wastewater or waste stream in a batch process for 1 to 60 minutes.

12 . The method of claim 10 , wherein the water is contacted with the wastewater or waste stream in a batch process for 1 to 20 minutes.

13 . The method of claim 10 , wherein at least 90% of the organic molecules are removed in less than 20 minutes.

14 . The method of claim 10 , further comprising the step of removing the organic molecules from the composite, and recycling the composite.

15 . The method of claim 10 , wherein the composite is formed by sonication of a solution of water comprising the graphene oxide and magnesium oxide.

16 . The method of claim 10 , wherein the composite is impregnated in or on a substrate.

17 . The method of claim 10 , wherein the composite is graphene oxide and magnesium oxide nanoparticles and has a ratio of 3:1, 1:1, and 1:3 weight to weight.

18 . The method of claim 10 , wherein the composite is graphene oxide and magnesium oxide nanoparticles and has a ratio of 4:1, 1:1, and 1:4 weight to weight.

19 . The method of claim 10 , wherein the composite is graphene oxide and magnesium oxide nanoparticles and has a ratio of 5:1 to 1:5.

20 . The method of claim 10 , wherein the pH of the wastewater or waste stream is between 6 and 8.

21 . A method of making a composite of graphene oxide and magnesium oxide nanoparticles comprising:
resuspending a graphene oxide in water; mixing the graphene oxide in water with magnesium oxide nanoparticles; sonicating the mixture of graphene oxide and magnesium oxide nanoparticles; and removing the water from the mixture of graphene oxide and magnesium oxide nanoparticles to form a composite of graphene oxide and magnesium oxide.

Assignees

• Univ Southern Methodist

Inventors

• Heidarizad Mahdi
• Sengör S Sevinç

Classifications

• C02F2303/16

  Regeneration of sorbents, filters · CPC title

• C02F1/288 Primary

  using composite sorbents, e.g. coated, impregnated, multi-layered · CPC title

• C02F2101/308

  Dyes; Colorants; Fluorescent agents · CPC title

• B01J20/205

  Carbon nanostructures, e.g. nanotubes, nanohorns, nanocones, nanoballs (carbon nanotubes per se C01B32/15) · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title