• 专利标题:   Macro-preparation of nitrogen-doped graphene for e.g. supercapacitor, involves mixing precursor e.g. graphite-like phase carbonitride nanosheet or urea, with metal magnesium powder, heating, cooling, washing with diluted acid, and drying.
  • 专利号:   WO2018205815-A1, CN108862244-A
  • 发明人:   MAO Z, CHEN J, WANG D, TANG Y, BIE L
  • 专利权人:   UNIV TIANJIN TECHNOLOGY
  • 国际专利分类:   C01B032/182, C01B032/184
  • 专利详细信息:   WO2018205815-A1 15 Nov 2018 C01B-032/184 201879 Pages: 23 Chinese
  • 申请详细信息:   WO2018205815-A1 WOCN083796 19 Apr 2018
  • 优先权号:   CN10331301

▎ 摘  要

NOVELTY - Macro-preparation of nitrogen-doped graphene involves uniformly mixing a precursor (a) which is a graphite-like phase carbonitride nanosheet, urea, melamine or cyanamide, with a metal magnesium powder, heating the formed mixture at 700-850 degrees C for 10-360 minutes under an argon atmosphere, naturally cooling to room temperature of 20-25 degrees C to form a brown-black powder, washing the brown-black powder with a diluted acid 2-3 times, and washing the brown-black powder with deionized water 2-3 times, and drying at 50-80 degrees C. When the precursor (a) is graphite-like phase carbonitride nanosheet, the mass ratio of graphite-like phase carbonitride nanosheet with respect to metal magnesium powder is 1:(0.1-1). When the precursor (a) is urea, melamine or cyanamide, the mass ratio of the urea, melamine or cyanamide with respect to metal magnesium powder is 1:(0.05-0.2). USE - Macro-preparation of nitrogen-doped graphene (claimed) used for supercapacitor, adsorption application and catalysis application. ADVANTAGE - The method enables simple, economical and large-scale macro-preparation of nitrogen-doped graphene with high yield, and low equipment requirements. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen and sulfur co-doped graphene, which involves using a carbon-nitrogen-sulfur precursor. The carbon-nitrogen-sulfur precursor is a sulfur-doped graphite-like phase carbonitride nanosheet or a sulfur-carbon-nitrogen mixture. The mass ratio of the carbon-nitrogen-sulfur precursor with respect to magnesium metal powder is 1:(0.1-0.8).