• 专利标题:   Preparing tin dioxide material with few layers of graphene modified with oxygen vacancy, comprises e.g. reacting tin tetrachloride, ethanol, water and concentrated hydrochloric acid, mixing graphite powder, sulfuric acid and phosphoric acid.
  • 专利号:   CN112357952-A
  • 发明人:   CHEN S, LIN L, HU N
  • 专利权人:   UNIV CHONGQING
  • 国际专利分类:   B82Y015/00, B82Y030/00, B82Y040/00, C01B032/19, C01G019/02
  • 专利详细信息:   CN112357952-A 12 Feb 2021 C01G-019/02 202121 Pages: 15 Chinese
  • 申请详细信息:   CN112357952-A CN11248588 10 Nov 2020
  • 优先权号:   CN11248588

▎ 摘  要

NOVELTY - Preparing tin dioxide material with few layers of graphene modified with oxygen vacancy, comprises (i) mixing tin tetrachloride, ethanol, water and concentrated hydrochloric acid uniformly, heating and reacting to obtain white precipitate, and calcining to obtain pure tin dioxide, (ii) stirring graphite powder, sodium nitrate, sulfuric acid and phosphoric acid uniformly under the condition of ice water bath, slowly adding potassium permanganate (KMn2O4) into the reaction, transferring to water bath, continue stirring, and adding hydrogen peroxide to obtain graphene oxide solution, (iii) mixing and reacting obtained tin dioxide powder and graphene oxide aqueous solution to obtain tin dioxide-graphene oxide composite material, and (iv) soaking tin dioxide-graphene oxide in sodium borohydride solution, and calcining in nitrogen environment to obtain oxygen vacancy tin dioxide-reduced graphene oxide composite material. USE - The tin dioxide material with few layers of graphene modified with oxygen vacancy is useful as supercapacitor anode material. ADVANTAGE - The material: high sensitivity and cycle stability to reducing gases. The method: has simple operation; and is suitable for large scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for oxygen vacancy tin dioxide-reduced graphene oxide composite material prepared by above method.