Method for producing hollow activated carbon nanofiber for activating peroxymonosulfate, catalyst for purifying water, and method for purifying water

Patent metadata

Field	Value
Publication number	US-11980873-B2
Application number	US-202117171945-A
Country	US
Kind code	B2
Filing date	Feb 9, 2021
Priority date	Feb 10, 2020
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

The present invention relates to a method for producing hollow activated carbon nanofibers for activating peroxymonosulfate used in water purification; a catalyst for water purification comprising the hollow active carbon nanofibers produced by the method; and a method for purifying contaminated water using the catalyst. The production method of the present invention can easily produce hollow activated carbon nanofibers capable of rapidly purifying contaminated water by highly efficiently activating peroxymonosulfate used for water purification.

First claim

What is claimed is:

1. A catalyst for purifying water, comprising:
hollow activated carbon nanofibers for activating peroxymonosulfate, wherein the hollow activated carbon nanofibers comprise a carbon material body formed into a tubular shape in which a hollow is formed on the inside of the hollow activated carbon nanofibers, and a plurality of fine pores are formed in the body of the hollow activated carbon nanofibers, Co x Mn 3-x O 4 is distributed in at least one of the hollow and the fine pores, and x in Co x Mn 3-x O 4 is 1 or 2, and
peroxymonosulfate,
wherein activation of peroxymonosulfate by the hollow activated carbon nanofibers generates sulfate radicals (SO 4 − ) and hydroxyl radicals (OH − ).

2. The catalyst according to claim 1 , wherein the hollow activated carbon nanofibers for activating peroxymonosulfate are produced by:
electrospinning two different materials in a concentric cross-section such that a material comprising at least one of manganese acetate and cobalt acetate and polymethyl methacrylate (PMMA) is disposed on the inside and a material comprising peroxyacetyl nitrate (PAN) is disposed on the outside;
performing a first thermal treatment on the structure formed by the electrospinning until a first predetermined temperature in an air atmosphere;
performing a second thermal treatment on the first thermally treated structure until a second predetermined temperature in a nitrogen atmosphere; and
activating the second thermally treated structure by applying a predetermined gas or water vapor.

3. The catalyst according to claim 1 , wherein x is 2.

4. The catalyst according to claim 1 , wherein the peroxymonosulfate is 2KHSO 5 ·KHSO·K 2 SO 4 .

5. A method for purifying contaminated water, comprising adding the catalyst for water purification according to claim 1 to contaminated water.

Assignees

• Uif Univ Industry Foundation Yonsei Univ

Inventors

• Hwang Jung Ho
• Kang Sang Mo
• Kim Hyeong Rae

Classifications

• B01J23/8892 Primary

  Manganese · CPC title

• B01J21/18

  Carbon · CPC title

• B01J35/58

  Fabrics or filaments · CPC title

• B01J37/084 Primary

  Decomposition of carbon-containing compounds into carbon · CPC title

• B01J37/086

  Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid · CPC title