手性介孔碳质纳米纤维和氮掺杂碳质纳米管的制备和表征

发布时间：2018-05-05 10:36

本文选题：手性 + 介孔　；参考：《苏州大学》2015年硕士论文

【摘要】：手性介孔碳质纳米材料因其本身独特的结构特色:可控孔径,较大比表面积,光学活性,近来成为研究的热点。本文采用超分子模板法,以间苯二酚-甲醛树脂作为碳源制备手性介孔碳质纳米纤维。为了扩大以3-氨基苯酚-甲醛树脂作为碳源,制备氮掺杂的碳质纳米材料的应用范围。本文以阳离子两亲性小分子组装体为模板,3-氨基苯酚-甲醛树脂作为碳源,制备氮掺杂的直的碳质纳米管和纳米尺度下具有螺旋形貌的纳米管。首先以十六烷基三甲基溴化铵的组装体为模板,(S)-香草醇作为手性添加剂,1,2-二(三乙氧基硅基)乙烷为硅源制备具有层状孔以及环形孔道的1,2-亚乙基桥联聚倍半硅氧烷纳米纤维;氩气保护下,碳化氧化硅纳米纤维制备C/SiO2复合的纳米纤维。空气条件下煅烧得到具有层状孔的二氧化硅纳米纤维;当C/SiO2复合纳米材料经过HF刻蚀,只得到无规则的纳米颗粒,说明C/SiO2纳米纤维的主体成分为二氧化硅,其中碳主要以相互独立颗粒存在。然后以L-,D-18Val11PyBr自组装体为模板,间苯二酚-甲醛树脂作为碳源,正硅酸四乙酯作为硅源制备介孔碳质纳米纤维。二氧化硅在反应体系中占据的空间位置作为介孔的主要来源,圆二色谱测试结果表明所得到的介孔碳质纳米纤维具有光学活性。最后基于L-,D-18Val11PyPF6自组装体为模板,3-氨基苯酚-甲醛树脂为碳源制备氮掺杂的直的碳质纳米管及单手螺旋碳质纳米管。圆二色谱测试结果表明所得到3-氨基苯酚-甲醛树脂纳米管和碳质纳米管均具有光学活性,为其应用于不对称催化,对映体分离奠定基础。
[Abstract]:Chiral mesoporous carbon nanomaterials have recently become a hot research area due to their unique structural characteristics such as controllable pore size, large specific surface area and optical activity. Chiral mesoporous carbon nanofibers were prepared by supramolecular template method using resorcinol-formaldehyde resin as carbon source. In order to expand the application of nitrogen-doped carbon nanomaterials with 3-aminophenol-formaldehyde resin as carbon source. In this paper, nitrogen-doped carbon nanotubes and helical nanotubes with helical morphology were prepared by using a cationic amphiphilic small molecular assembly as a template, 3-aminophenol-formaldehyde resin as a carbon source. In this paper, 1 / 2 ethylenesiloxane nanofibers with layered pore and annular pore were prepared by using hexadecyltrimethylammonium bromide as template and vanillic alcohol as chiral additive. C/SiO2 nanofibers were prepared by carbonized silica nanofibers under argon protection. Silica nanofibers with layered pores were obtained by calcination in air, and when C/SiO2 nanocomposites were etched by HF, only irregular nanoparticles were obtained, indicating that the main component of C/SiO2 nanofibers was silica. Carbon mainly exists as independent particles. Then the mesoporous carbon nanofibers were prepared by using L-L- D-18Val11PyBr self-assembly as template, resorcinol-formaldehyde resin as carbon source, tetraethyl orthosilicate as silicon source. The space position occupied by silica in the reaction system is the main source of mesoporous materials. Circular dichroism (CD) spectra show that the mesoporous carbon nanofibers are optically active. Finally, N-doped carbon nanotubes and single-hand spiral carbon nanotubes were prepared by using L-L- D-18Val11PyPF6 self-assembly as template and 3-aminophenol-formaldehyde resin as carbon source. The results of circular dichroism showed that both 3-aminophenol-formaldehyde resin nanotubes and carbon nanotubes had optical activity, which laid a foundation for their application in asymmetric catalysis and enantiomeric separation.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ340.1;O613.71;TB383.1

【共引文献】