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G-C3N4 film

外国特許コード F190009915
整理番号 08105-US
掲載日 2019年8月26日
出願国 アメリカ合衆国
出願番号 201314653641
公報番号 20150352539
公報番号 10252253
出願日 平成25年12月24日(2013.12.24)
公報発行日 平成27年12月10日(2015.12.10)
公報発行日 平成31年4月9日(2019.4.9)
国際出願番号 JP2013084543
国際公開番号 WO2014098251
国際出願日 平成25年12月24日(2013.12.24)
国際公開日 平成26年6月26日(2014.6.26)
優先権データ
  • 特願2012-280283 (2012.12.21) JP
  • 2013JP84543 (2013.12.24) WO
発明の名称 (英語) G-C3N4 film
発明の概要(英語) 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.
従来技術、競合技術の概要(英語) BACKGROUND ART
Organic photocatalysts composed of ubiquitous elements such as carbon and nitrogen have attracted attention as environment-friendly and resource-conscious materials. Graphitic carbon nitride (g-C3N4), which is a polymer that produces hydrogen through water photolysis (Non-Patent Literature 1), is a heterogeneous organic photocatalyst excellent in light resistance. A hydrogen production process in which fossil fuel is used as a starting material produces carbon dioxide in the production process. On the contrary, a hydrogen production process carried out through water photolysis by g-C3N4 produces no carbon dioxide. Such a process allows providing environment-friendly clean energy.
For example, g-C3N4 can be produced as a water-insoluble powdery polymer by consecutive polymerization of a monomer such as, for example, cyanamide (Non-Patent Literature 2), melamine (Non-Patent Literature 3), urea (Non-Patent Literature 4), thiourea (Non-Patent Literature 6), or dicyandiamide (Non-Patent Literature 5). Non-Patent Literature 7 discloses performing spin-coating with a solution of dicyandiamide and then heating the spin-coated dicyandiamide to obtain g-C3N4 in sheet form.
特許請求の範囲(英語) [claim1]
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°.

[claim2]
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.

[claim3]
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/cm2 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.

[claim4]
4. The graphitic carbon nitride film according to claim 1, wherein
the graphitic carbon nitride film has transparency.

[claim5]
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+mY+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, Ym- is an anion, and m is a valence of Y,
wherein, in Formulae (I) and (II), R1, R2, and R3 are independently selected from an amino group, a nitro group, an alkyl group having 1 to 10 carbon atoms, ―(C2H4O)n―R4 (where n is 1 to 10, and R4 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.

[claim6]
6. A base material having the graphitic carbon nitride film according to claim 5 fixed on a surface thereof.

[claim7]
7. An electrically conductive substrate having the graphitic carbon nitride film according to claim 5 fixed on a surface thereof.
  • 発明者/出願人(英語)
  • Miyajima Daigo
  • Arazoe Hiroki
  • Kawamoto Masuki
  • Akaike Kouki
  • Koizumi Yoshiko
  • Aida Takuzo
  • RIKEN
国際特許分類(IPC)

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