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CARBON NITRIDE, METHOD FOR PRODUCING SAME, AND SEMICONDUCTOR MATERIAL NEW 新技術説明会

外国特許コード F190009934
整理番号 (2017-040,S2018-0116-N0)
掲載日 2019年10月24日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP044203
国際公開番号 WO 2019130983
国際出願日 平成30年11月30日(2018.11.30)
国際公開日 令和元年7月4日(2019.7.4)
優先権データ
  • 特願2017-248186 (2017.12.25) JP
発明の名称 (英語) CARBON NITRIDE, METHOD FOR PRODUCING SAME, AND SEMICONDUCTOR MATERIAL NEW 新技術説明会
発明の概要(英語) Provided are: a carbon nitride in which a band gap in a graphite type carbon nitride (g-C3N4) can be systematically controlled in an extremely broad region from approximately 2.7 eV to 0 eV using a simple and inexpensive method; a method for producing same; and a semiconductor material. This carbon nitride comprises a polymer of: a first monomer, dicyandiamide; and at least one second monomer selected from the group consisting of cyclic carbonates and organic compounds having two or more identical or different functional groups selected from the group consisting of hydroxyl groups, amino groups, carboxyl groups and amide groups. The molar ratio of the first monomer and the second monomer is 100:0.1-100:100. Moreover, oxalic acid is excluded as the second monomer. This carbon nitride is obtained by weighing out, mixing, heating and polymerizing the monomers. A carbon nitride having a band gap of 0.01-2.5 eV can be used as a semiconductor material.
従来技術、競合技術の概要(英語) BACKGROUND ART
Tris triazine or triazine molecules coupled to the graphite-type carbon nitride is infinite (g-C3N4) is, the band gap in the visible light range from 2.7eV, an absorption band near 460nm is increased, it assumes a yellow color material. Graphite-type carbon, there is no fear that the depletion of resources in the ubiquitous elements carbon and nitrogen atoms from a semiconductor material, the applied research is underway. In particular, the conduction band and the valence band, the thermodynamically water molecules can be decomposed into oxygen and hydrogen for in the energy region of light, chemical, excellent environmental durability has attracted attention as a light metal-free catalyst.
Urea, melamine, or dicyandiamide raw materials such as graphite is heated at about 550°C carbon nitride can be synthesized. In the prior art, a wide range of sunlight in response to the wavelength of visible light for the synthesis of a graphite-type carbon, molecular doping method has been developed. Barbituric acid as a doping agent molecule copolymer using dicyandiamide (Non-Patent Document 1), further, can be used a copolymer obtained by copolymerizing hexamethylmethylolmelamine triaminopyrimidine (Non-Patent Document 2) in the, band gap can be systematically reduced successfully. Aromatic carbon skeleton having a double bond or an amino group or a cyano group, or a copolymer of a molecule containing both the band gap is reduced by the composite carbon nitride (non-patent document 3). Quinoline molecules may be doped have been reported (Non-Patent Document 4). Furan or thiophene and the like and having a formyl group, and a melamine resin, to form a Schiff base to achieve a doping molecule (non-patent document 5). These prior documents, all, an aromatic molecule on the carbon composition ratio is high and the target doping, to reduce the band gap, depends on the doping amount and a band gap control.
On the other hand, in the doping of the non-aromatic molecule, and melamine hydrogen bonds and ethanol (non-patent document 6), and melamine cyanuric acid can hydrogen bond with ethylene glycol (non-patent document 7) method has been reported.
In addition, the band gap of graphene doped with a nitrogen atom in 0eV, the band gap by introducing a defect structure 1eV can be extended to the theoretically known. From the graphene carbon nitride, the wide bandgap semiconductor as a function of the TFT element and the secondary battery electrode is also expected.
1eV To 0eV from the band gap of the black group carbon nitride has a high electrical conductivity, functions as the active site of the nitrogen sites has been the development of an electrochemical catalyst. Used in the fuel cell electrode catalyst as a substitute for the expensive platinum oxygen reduction catalyst in addition to the free metal, recently, 2 or more carbon atoms such as ethanol to carbon dioxide into useful materials electrochemical reduction of carbon nitride metal-free catalyst has been reported that a (non-patent document 8). And a composite copper nanocrystals by the catalyst and carbon nitride, carbon dioxide in ethanol at a high efficiency, the function of the electrochemical conversion with high selectivity has been reported (Non-Patent Document 9), metal-free ethanol to carbon dioxide at high efficiency, highly selective conversion of carbon nitride is a chemical catalyst have been reported (Non-Patent Document 10).
In this way, only the ubiquitous element group composed of carbon nitride, the band gap from 2.7 to 0eV can be controlled and, in response to visible light and the function of the optical semiconductor, metal-free electrochemical catalyst such as a pseudo metal, and the analyte of the function is a material expected for practical applications.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • YAMAGATA UNIVERSITY
  • 発明者(英語)
  • KURIHARA, Masato
  • ISHIZAKI, Manabu
  • ARAI, Miyu
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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