Layer-by-layer self-assembled multi-walled carbon nanotubes/silica microsphere composites as the sta

• 作 者: Xiaojing Liang Xia Liu Shengxiang Jiang
• 机 构: Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Gansu, Lanzhou 730000, China
• 出 处: 第2届大连国际色谱学术报告会、第37届国际高效液相色谱及相关技术会议、第18届全国色谱学术报告会
• 发表日期: 2011年3期
• 关键词: Chromatographic stationary phase Layer-by-layer self-assembly Multi-walled carbo

　　Multi-walled carbon nanotubes (MWCNTs) were layer-by-layer assembled onto silica microspheres to form MWCNTs/SiO2 composites.Characterizations of this stationary phase confirmed that MWCNTs was successfully attached on the silica surface layer-by-layer.The composite was used as a stationary phase in HPLC for the separation of many kinds of aromatic compounds.The separation of polycyclic aromatic hydrocarbons (PAHs) effected by the number of MWCNTs layers on the SiO2 was investigated.Retention times and peak widths of PAHs were influenced by MWCNTs assembly layer, size of conjugation aromatic ring of PAHs, types and content of organic additives in mobile phase as well.When the MWCNTs layer increasing to 5 (MWCNTs/SiO2-5), PAHs can be completely separated (Fig.1).