【作者】 柳泉润；

【导师】 李永丹； 朴玲钰；

【作者基本信息】 天津大学 ， 工业催化， 2009， 硕士

【摘要】 本文使用综合法处理CVD法制备的SWNTs,得到了纯度高、带有含氧基团的单壁碳纳米管。以此单壁碳纳米管为出发点,选用氨基酸在超声条件下进行吸附。选用多种分析手段对氨基酸与单壁碳纳米管的吸附体系进行了研究,并对二者的反应机理进行了探索。1.使用综合法对CVD法制备的SWNTs进行了纯化处理,得到OSWNT,通过TG、Raman和FT-IR等方法的检测,表明通过此方法得到的OSWNT中SWNTs的纯度达到95%以上,而且带有一定的含氧基团。2.实现了获得稳定SWNTs/Phe溶液的简单且绿色的过程,并系统地进行了OSWNT与氨基酸分子间吸附机理的研究。因Phe的自发吸附,使OSWNT的表面亲水性增强,与Phe形成可稳定存在150天以上的溶液。Phe和Lys对不同管径OSWNT具有吸附选择性,优先吸附于大管径OSWNT上。在π-π相互作用、氢键和部分酰氨共价键的共同作用下,Phe被吸附到OSWNT表面。在OSWNT无缺陷的侧壁,π-π相互作用是OSWNT与Phe分子的主要吸附方式;在OSWNT的氧化缺陷和末端,氢键和共价作用成为吸附的主要形式。在酰胺键的作用下,Lys被吸附到OSWNT末端,共价作用成为吸附的主要形式3.根据氨基酸吸附机理,通过氨基酸在OSWNT上的吸附,实现了SWNTs的分散,同时研究了不同氨基酸对OSWNT的分散作用,依据结构对分散作用力进行了研究。对于分散OSWNT的作用能力来说,酰氨共价作用力强于π-π相互作用力。更多还原

【Abstract】 High purity single-walled carbon nanotubes (SWNTs) with oxygen-obtaining groups were prepared. The adsorption L- Phenylalanine on the SWNTs was examined. Various techniques were employed to characterize the material.An interaction mechanism between the Phe molecule and the OSWNT was proposed and discussed. This work includes:1. The SWNTs prepared by CVD method were purified. OSWNT was obtained with further treatment. TG, Raman and FT-IR were employed to measure the purity of SWNTs and the oxygen containing groups. The purity of OSWNT was above 95 percent and had a large mount of oxygen-obtaining groups.2. An approach was carried out to obtain the stable OSWNT/Phe solution. The OSWNT became soluble in water since the Phe was adsorbed. This OSWNT/Phe solution is even stable after 150 days. The Phe and Lys molecules were advantageously absorbed on that part of OSWNT with larger diameter. The Phe molecules were absorbed on the OSWNT by conjunct interaction of theπ-πboning and hydrogen bonding. Theπ-πbonding leads to interaction on the sidewall without defects. The hydrogen bond formed with oxygen containing groups is dominant on the defective sections and the end of OSWNT.3. Based on the interaction mechanism between the animo acid molecule and the OSWNT, the distributed SWNTs was obtained by the absorption of animo acid molecules.更多还原