• 专利标题:   Preparation of tricobalt tetroxide-nickel monoxide-graphene aerogel catalyst for combustion of volatile organic compounds, involves dispersing cobalt salt/nickel salt solution and graphene oxide solution, hydrothermally reacting to obtain hydrogel, aging, replacing solvent, and freeze-drying.
  • 专利号:   CN113198477-A
  • 发明人:   SHEN X, ZHU K, RUAN L, CUI S
  • 专利权人:   UNIV NANJING TECHNOLOGY, UNIV NANJING TECHNOLOGY SUQIAN NEW MATER
  • 国际专利分类:   B01D053/44, B01D053/72, B01D053/86, B01J023/755, B01J035/10
  • 专利详细信息:   CN113198477-A 03 Aug 2021 B01J-023/755 202176 Pages: 6 Chinese
  • 申请详细信息:   CN113198477-A CN10456832 27 Apr 2021
  • 优先权号:   CN10456832

▎ 摘  要

NOVELTY - Preparation of tricobalt tetroxide-nickel monoxide-graphene aerogel catalyst, involves stirring and dispersing graphene oxide in deionized water to obtain a graphene oxide aqueous solution, dripping aqueous ammonia to graphene oxide aqueous solution to adjust the pH, stir-mixing to obtain mixed solution (A), stirring and dispersing a cobalt salt and a nickel salt in deionized water to obtain mixed solution (B), dripping solution (B) in solution (A), stirring, ultrasonically dispersing to obtain a mixed dispersion, pouring the dispersion to a lined hydrothermal reactor, hydrothermally reacting to obtain a tricobalt tetroxide-nickel monoxide-graphene hydrogel, taking the hydrogel from the furnace, adding to deionized water for aging, replacing the deionized water for solvent replacement for every set time period, taking out the sample, and freeze-drying. USE - Preparation of tricobalt tetroxide-nickel monoxide-graphene aerogel catalyst for combustion of volatile organic compounds. ADVANTAGE - The method provides catalyst having excellent combustion efficiency. The load of nano-oxide particles plays a role of catalysis while improving the agglomeration between the graphene layers. More catalytic activity sites are provided for the active component. The dispersibility of active oxide nanoparticles is improved. The active component fully contacts the reactant. The synergistic effect of each component in the composite catalyst material effectively solves the defect of single component material, to greatly improve the catalytic efficiency. The obtained catalyst has a specific surface area of 123-158 m2/g, and a toluene catalytic conversion rate of 86-95% at a toluene sampling flow rate of 6 mL/hour, a carrier gas nitrogen flow rate of 30 mL/minute, normal pressure, and a temperature of 250 degrees C.