Generation of hierarchical porosity in beta zeolite by post-synthesis treatment with the cetyltrimethylammonium cationic surfactant under alkaline conditions
作者: Natalia SuárezJoaquín Pérez-ParienteFanor MondragónAndrés Moreno
作者单位: 1Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No.52-21, Medellín, Colombia
2Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2, Madrid, Spain
刊名: Microporous and Mesoporous Materials, 2019, Vol.280 , pp.144-150
来源数据库: Elsevier Journal
DOI: 10.1016/j.micromeso.2019.02.001
关键词: ZeolitesPost-synthesis modificationMesoporous betaMaterialsCatalysisCharacterization
英文摘要: Abstract(#br)Commercial Beta zeolite (Si/Al = 19) was treated with aqueous solutions of hexadecyltrimethylammonium (CTA) in the presence of NaOH or NH 4 OH to generate hierarchical porosity in the material. The combination of a basic media and surfactant (CTA) allows generation of mesoporosity while preserving the crystallinity and acidity of the parent Beta zeolite. In addition, characterization by XRD and TEM gave no evidence for the formation of segregated mesoporous phases. TEM and N 2 adsorption isotherms suggest the presence of substantial intracrystalline mesoporosity (average pore size of 3 nm) in the Beta zeolite crystals, which was more pronounced for samples treated with CTA/NaOH solutions. The concentration of total Brønsted acid sites was determined by pyridine adsorption,...
全文获取路径: Elsevier  (合作)
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影响因子:3.365 (2012)

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关键词翻译
关键词翻译
  • hierarchical 分级
  • surfactant 表面活性剂
  • synthesis 合成
  • porosity 孔隙率
  • zeolite 沸石
  • alkaline 碱的
  • conditions 条件式
  • treatment 处理
  • cationic 阳离子的
  • under 在下