• 专利标题:   Visible light catalyst used e.g. for oxidative degradation of industrial wastewater and industrial dye, is doped graphene-modified hexagonal crystal type tungsten trioxide nanocomposite photocatalyst having specified graphene content.
  • 专利号:   CN104056620-A, CN104056620-B
  • 发明人:   GAO Y, GUO W, WU D
  • 专利权人:   UNIV SOUTHEAST
  • 国际专利分类:   B01J023/30, C01B013/02, C02F001/30, C02F103/30
  • 专利详细信息:   CN104056620-A 24 Sep 2014 B01J-023/30 201501 Pages: 6 Chinese
  • 申请详细信息:   CN104056620-A CN10275645 19 Jun 2014
  • 优先权号:   CN10275645

▎ 摘  要

NOVELTY - Visible light catalyst is doped graphene-modified hexagonal crystal type tungsten trioxide nanocomposite photocatalyst having graphene content of 0.1-1.0 mass%. USE - Visible light catalyst used for oxidative degradation of industrial wastewater and industrial dye and photocatalytic decomposition of water into oxygen (all claimed). ADVANTAGE - The visible light catalyst has improved photocatalytic activity and good response in the visible light area and realizes efficient production of hydrogen. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of visible light catalyst by solvothermal one-step synthesis comprising preparing microemulsion using 9-12 wt.% ammonium m-tungstate dihydrate, 72-78 wt.% deionized water, 8-10 wt.% ethanol, 2-4 wt.% propanol and 1-2 wt.% acetone and strongly stirring, dropwise adding concentrated hydrochloric acid until precipitates are completely dissolved, adding 0.01-0.5 mass% graphene oxide solution, adding diluted hydrochloric acid to adjust the pH at 0.5-2, continuously stirring for 10-30 minutes, transferring to high temperature hydrothermal reaction kettle, heat preserving at 120-200 degrees C for 12-72 hours, naturally cooling to room temperature, centrifuging, water washing and alcohol washing, vacuum drying and grinding to obtain the product.