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

Patent metadata

Field	Value
Publication number	US-10974230-B2
Application number	US-201916380174-A
Country	US
Kind code	B2
Filing date	Apr 10, 2019
Priority date	Jun 18, 2008
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A composite synthesized by the steps of 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 a doped carbon composite.

First claim

What is claimed is:

1. A composite synthesized by the steps of:
(a) preparing a solution having a carbon source material and a non-metallic heteroatom containing additive containing a doping chemical element, wherein the carbon source material comprises tannin, urea, lignin, lignosulfonate, tannin sulfonate, phenol formaldehyde resins, melamine formaldehyde resins, tannin formaldehyde resins, urea formaldehyde resins, or a mixture thereof;
(b) evaporating the solution to yield a plurality of powders; and
(c) subjecting the plurality of powders to a heat treatment for a duration of time effective to produce a doped carbon composite,
wherein no metal source material is used in the steps, such that the doped carbon composite does not contain metal component;
wherein the non-metallic heteroatom containing additive comprises oxygen (O), nitrogen (N), phosphorus (P), sulfur (S), iodine (I), fluorine (F), mixture thereof; and

wherein the non-metallic heteroatom containing additive further comprises a boron compound containing boric acid.

2. The composite of claim 1 , wherein the synthesis process further comprises the step of adding polyphosphoric acid to the plurality of powders prior to the subjecting step.

3. The composite of claim 1 , being usable for a supercapacitor, a fuel cell, photovoltaic cell, a lithium ion battery, an air filter, or a water filter.

4. An article of manufacture, comprising the composite of claim 1 .

5. The article of manufacture of claim 4 , being a supercapacitor, a fuel cell, photovoltaic cell, a lithium ion battery, an air filter, or a water filter.

6. A composite synthesized by the steps of:
(a) preparing a solution having a carbon source material and a non-metallic heteroatom containing additive containing a doping chemical element, wherein the carbon source material comprises tannin, urea, lignin, lignosulfonate, tannin sulfonate, phenol formaldehyde resins, melamine formaldehyde resins, tannin formaldehyde resins, urea formaldehyde resins, or a mixture thereof;
(b) evaporating the solution to yield a plurality of powders; and
(c) subjecting the plurality of powders to a heat treatment for a duration of time effective to produce a doped carbon composite,
wherein no metal source material is used in the steps, such that the doped carbon composite does not contain metal component;
wherein the non-metallic heteroatom containing additive comprises oxygen (O), phosphorus (P), boron (B), sulfur (S), iodine (I), fluorine (F), a nitrogen compound containing melamine, dicyandiamide, urea, guanidine, or histidine, or a mixture thereof; and
wherein the non-metallic heteroatom containing additive further comprises hexamine.

7. The composite of claim 6 useable for visible light degradation of organic molecules in water.

Assignees

• Univ Arkansas

Inventors

• Viswanathan Tito

Classifications

• C02F2305/10

  Photocatalysts · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title

• C02F1/30

  by irradiation · CPC title

• C02F2101/30

  Organic compounds · CPC title

• B01J37/0236

  Drying, e.g. preparing a suspension, adding a soluble salt and drying · CPC title