G-C3N4 film

Patent metadata

Field	Value
Publication number	US-10252253-B2
Application number	US-201314653641-A
Country	US
Kind code	B2
Filing date	Dec 24, 2013
Priority date	Dec 21, 2012
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

In order to provide g-C3N4 capable of being simply and easily handled, a g-C3N4 film is produced by heating, as a starting material, a compound represented by X+mYm−, wherein X+ is a guanidium ion or the like ion, and Ym− is an anion, to vaporize the compound or its reactant, and depositing the compound or the reactant over a surface of a base material heated, the surface carrying negative electric charges or having π electrons, so that the compound or the reactant is polymerized on the base material to generate g-C3N4.

First claim

The invention claimed is:

1. A graphitic carbon nitride film having a single-layer or multilayer sheet structure in which melem structural units are crosslinked in two-dimensional directions, wherein a peak obtained for the graphitic carbon nitride film having a multilayer sheet structure by out-of-plane X-ray diffraction is derived from a sheet-to-sheet distance only, and wherein the film does not have a reflection peak which is derived from the inter-melem skeleton and corresponds to a peak in the vicinity of 2θ=12.5°.

2. The graphitic carbon nitride film according to claim 1 , wherein
the sheet-to-sheet distance is in a range from 3.17 Å to 3.26 Å.

3. The graphitic carbon nitride film according to claim 1 , wherein
the graphitic carbon nitride film produces a photocurrent of not less than 0.8 μA/cm 2 when the graphitic carbon nitride film is irradiated with visible light of not less than 420 nm while a constant voltage of 0.2 V is applied to the graphitic carbon nitride film.

4. The graphitic carbon nitride film according to claim 1 , wherein
the graphitic carbon nitride film has transparency.

5. The graphitic carbon nitride film according to claim 1 , wherein
the graphitic carbon nitride film being produced by a method for producing a graphitic carbon nitride film, the method comprising the steps of:
heating, as a starting material, a compound represented by X + m Y + wherein X + is selected from a guanidium ion, a guanidine derivative ion represented by Formula (I) below, and a guanidine derivative ion represented by Formula (II) below, Y m− is an anion, and m is a valence of Y,

wherein, in Formulae (I) and (II), R 1 , R 2 , and R 3 are independently selected from an amino group, a nitro group, an alkyl group having 1 to 10 carbon atoms, —(C 2 H 4 O) n —R 4 (where n is 1 to 10, and R 4 is an alkyl group having 1 to 4 carbon atoms), halogen, and a primary amide group, to vaporize the compound or its reactant; and
depositing the compound or the reactant over a surface of a base material heated, the surface carrying negative electric charges or having π electrons, so that the compound or the reactant is polymerized on the base material to generate a graphitic carbon nitride.

6. A base material having the graphitic carbon nitride film according to claim 5 fixed on a surface thereof.

7. An electrically conductive substrate having the graphitic carbon nitride film according to claim 5 fixed on a surface thereof.

Assignees

• Riken

Inventors

• Miyajima Daigo
• Arazoe Hiroki
• Kawamoto Masuki
• Akaike Kouki
• Koizumi Yoshiko
• Aida Takuzo

Classifications

• C07D487/16

  Peri-condensed systems · CPC title

• B01J27/24 Primary

  Nitrogen compounds · CPC title

• C25B11/04

  characterised by the material · CPC title

• C01B21/0605

  Binary compounds of nitrogen with carbon · CPC title

• B01J37/0219

  the coating containing organic compounds · CPC title