物理化学学报2012，Vol.28Issue(7)：1790-1796,7.DOI:10.3866/PKU.WHXB201204174
超声分散对单壁碳纳米管分离的影响
Effects of Ultrasonic Dispersion on the Separation of Single-Walled Carbon Nanotubes
摘要
Abstract
Recently, gel chromatography has been demonstrated as an effective method for the separation of single-walled carbon nanotubes (SWCNTs) according to their electronic type and structure. The separation of SWCNTs was thought to result from the different affinity forces between the gel and various SWCNTs. Based on this method, we investigated the effect of ultrasonic time on the dispersion and separation of metallic and semiconducting SWCNTs. At a low ultrasonic power, with the increase of ultrasonic time, better monodispersed SWCNTs in sodium dodecylsulfate (SDS) aqueous solution were obtained. The UV-visible-near infrared (UV-Vis-NIR) absorption, Raman and photoluminescence (PL) spectroscopic characterizations confirmed that under the condition of ultrasonication (2 h), higher-purity metallic tubes and semiconducting tubes with different diameter distributions could be obtained. We believe that the control of the ultrasonication time may tune the mono-dispersity and the length of SWCNTs, which would further influence the difference in affinity forces between various SWCNTs and the gel, therefore leading to different separation results.关键词
单壁碳纳米管/凝胶柱色谱/分散/金属和半导体型分离/超声时间Key words
Single-walled carbon nanotube/ Gel column chromatography/ Dispersion/ Metal/semiconductor separation/ Ultrasonic time分类
化学化工引用本文复制引用
檀付瑞,李红波,桂慧,张静,李儒,金赫华..超声分散对单壁碳纳米管分离的影响[J].物理化学学报,2012,28(7):1790-1796,7.基金项目
国家重点基础研究发展规划项目(973) (2011CB932600)及国家自然科学基金(20903069,21073223)资助 （973）
