Preparation and application of carbon nanoparticle diode

Patent metadata

Field	Value
Publication number	US-10239039-B2
Application number	US-201414494299-A
Country	US
Kind code	B2
Filing date	Sep 23, 2014
Priority date	May 2, 2014
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

An oxidative method for water is provided. The oxidative method includes providing a compound having properties of a p-type semiconductor and an n-type semiconductor; obtaining a mixture by adding the compound to the water; and illuminating the mixture using a light source to excite the compound.

First claim

What is claimed is:

1. An oxidative/reductive method for water, comprising:
providing a graphene particle having a p-type conductivity domain and an n-type conductivity domain, wherein the graphene particle contains graphene oxide;
obtaining a mixture by adding the graphene particle to the water; and
illuminating the mixture by using a light source, wherein the graphene particle is excited by the light source, and the water is decomposed by the graphene oxide to generate hydrogen gas or oxygen gas.

2. The oxidative/reductive method as claimed in claim 1 , wherein the light source has an excitation wavelength ranging from 200 nm to 900 nm.

3. The oxidative/reductive method as claimed in claim 1 , wherein the water includes an organic material and an inorganic material.

4. The oxidative/reductive method as claimed in claim 1 , wherein the graphene particle is a doped graphene oxide.

5. The oxidative/reductive method as claimed in claim 4 , wherein the doped graphene oxide is a nitrogen-doped graphene oxide having at least a functional group selected from a group consisting of an amino group (NH 2 —), a boron atom (B—), a hydrogen atom (H—), a hydroxyl group (—OH), a nitrogen atom (N—), an oxygen atom (O—), a phosphorus atom (P—) and a combination thereof.

6. The oxidative/reductive method as claimed in claim 4 , wherein the doped graphene oxide is embedded with a nitrogen atom, and grafted with an oxygen atom on a surface of the graphene.

7. The oxidative/reductive method as claimed in claim 4 , wherein the doped graphene oxide has a particle size ranging from 6 nm to 10 nm, and a height ranging from 1 nm to 3 nm.

8. The oxidative/reductive method as claimed in claim 1 , wherein the graphene particle further has a carbon cluster serving as an interfacial junction between the p-type and n-type conductivity domains.

Assignees

• Univ Nat Cheng Kung

Inventors

• Teng Hsi-Sheng
• Yeh Te-Fu

Classifications

• Y10S977/774

  Exhibiting three-dimensional carrier confinement, e.g. quantum dots · CPC title

• B01J27/20

  Carbon compounds · CPC title

• B01J27/24

  Nitrogen compounds · CPC title

• B01J21/18

  Carbon · CPC title

• B01J19/127 Primary

  Sunlight; Visible light · CPC title