US 12,351,465 B1Granted

Method for preparing nitrogen/sulfur-doped activated carbon

AssigneeKuwait University

InventorsSaad Makhseed, Mohamed H. Alkordi

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Abstract

A method for preparing a nitrogen/sulfur-rich activated carbon, of exceptionally high surface area and microporous nature, the method comprising: preparing an aromatic oligomer including a heteroatom using an oxidative polymerization solution, wherein the oxidative polymerization solution comprises a first oxidizer and an organic solvent; mixing the oligomer with an activating agent to obtain a mixture; subjecting the mixture to carbonization and activation in a tube furnace; holding the mixture at a set temperature; cooling the mixture to room temperature to obtain a carbon material; purifying the carbon material by washing; washing the carbon material with water and methanol; drying the carbon material under vacuum to obtain a microporous carbon of high surface area and nitrogen/sulfur-rich composition.

Claims12

Dependent claims

A method for preparing nitrogen/sulfur doped activated carbon, the method comprising:

preparing an aromatic oligomer including a heteroatom-containing monomer using an oxidative polymerization solution, wherein the oxidative polymerization solution comprises a first oxidizer and an organic solvent, the heteroatom-containing monomer being selected from the group consisting of nitrogen (N), sulfur(S), and a combination thereof;
mixing the oligomer with an activating agent to obtain a mixture;
subjecting the mixture to carbonization and activation in a tube furnace;
holding the mixture at a set temperature for a period of time;
and
cooling the mixture to room temperature to obtain the nitrogen/sulfur doped activated carbon;
wherein the organic solvent is selected from the group consisting of dimethylformamide, 1,2-dichloroethane, chloroform, 1,2-dichlorobenzene, nitromethane, tetrahydrofuran, N-methylpyrrolidone, dimethyl sulfoxide, nitrobenzene butyl nitrite, and a combination thereof.

4 more elements

Dependencies are inferred from the claim text.