Doped-carbon composites, synthesizing methods and applications of the same

Patent metadata

Field	Value
Publication number	US-9643165-B2
Application number	US-201313767076-A
Country	US
Kind code	B2
Filing date	Feb 14, 2013
Priority date	Jun 18, 2008
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A method of synthesizing a doped carbon composite includes preparing a solution having a carbon source material and a heteroatom containing additive, evaporating the solution to yield a plurality of powders, and subjecting the plurality of powders to a heat treatment for a duration of time effective to produce the doped carbon composite.

First claim

What is claimed is:

1. A method of synthesizing a doped carbon composite, comprising the steps of:
(a) preparing a solution having a carbon source material and a non-metallic heteroatom containing additive;
(b) evaporating the solution to yield a plurality of powders; and
(c) subjecting the plurality of powders to a single heat treatment by microwave radiation under ambient conditions for a duration of time effective to produce the doped carbon composite,
wherein no metal source material is used in the method, such that the doped carbon composite does not contain metal component.

2. The method of claim 1 , wherein the carbon source material comprises tannin, urea, lignin, lignosulfonate, tannin sulfonate, phenol formaldehyde resins, melamine formaldehyde resins, tannin formaldehyde resins, resorcinol formaldehyde resins, urea formaldehyde resins, or a mixture thereof.

3. The method of claim 1 , wherein the non-metallic heteroatom containing additive comprises one containing oxygen (O), nitrogen (N), phosphorus (P), boron (B), sulfur (S), iodine (I), fluorine (F), or a mixture thereof.

4. The method of claim 1 , wherein the heat treatment is performed at a temperature in a range of about 700° C. to about 1800° C.

5. The method of claim 4 , wherein the duration of time effective is in a range of about 10 minutes to about 2 hours.

6. The method of claim 1 , wherein the microwave radiation has a frequency of 2.45 GHz.

7. The method of claim 1 , further comprising the step of adding polyphosphoric acid to the plurality of powders prior to the subjecting step.

Assignees

• Univ Arkansas

Inventors

• Viswanathan Tito

Classifications

• C01B31/02

  Chemistry & Metallurgy · mapped topic

• B01J27/16

  containing oxygen {, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr} · CPC title

• B01J27/24 Primary

  Nitrogen compounds · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title