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表面活性剂对无机纳米材料形貌的调控
Shape Control of Inorganic Nanocrystal by Surfactant
【作者】 李丽丽;
【导师】 褚莹;
【作者基本信息】 东北师范大学 , 物理化学, 2005, 硕士
【摘要】 纳米材料的特殊功能和效应,不但在学科发展上有重要意义,而且在应用上也有良好的前景,它为新材料的发展开辟了一个崭新的研究领域。具有完美形貌、大小及结构的纳米材料,性能大大优于相应人工合成的各种生物矿物纳米材料。基于有机模板的仿生材料合成已发展成为当前材料科学中一个非常活跃的研究领域,同时也构成了现代胶体与界面化学的一个重要研究方向。人们逐渐认识到表面活性剂在溶液中形成各种有序组合体是制备纳米颗粒有效的“软模板”。 本文分别利用丁二酸二(2-乙基己基)酯磺酸钠(AOT)、壬基-酚基-聚乙氧基醚(Oπ-10)和十六烷基三甲基溴化胺(CTAB)形成的不同软模板合成了具有不同形貌的CaCO3, BaCO3和 CeO2/CuO 纳米粒子。并通过改变表面活性剂类型和用量来研究纳米粒子形貌的变化, 掌握了表面活性剂调控纳米粒子形貌的机理。进一步探讨了反胶束水池大小,反应时间和反应物浓度对无机物纳米粒子形貌的影响。 将溶剂热应用到了 CTAB/环己烷/水反胶束体系当中,合成了具有特殊形貌的 CaCO3和 BaCO3纳米粒子。 以 CTAB 为软模板,水热辅助的情况下低温合成了多种形貌的 SnO2纳米粒子。探讨了 CTAB 用量对 SnO2纳米粒子形貌的影响和形成机理。 分别以软模板和硬模板合成了 PS/ZnO 核壳结构。 利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X-射线衍射(XRD)、红外光谱(IR)、拉曼光谱(Raman)等测试手段对产物的形貌、结构、结晶性等性质进行了一系列的表征。
【Abstract】 Owing to its special function and effect, nanoparticle not only play an important role in progress of science, but also has great potential in application. It breaks a new way for advance materials. Nanoparticles that have ideal morphology, size and structure are more excellent than those synthesized by artificial mineral in capability. The synthesis of bionic mineral through organic template has become an active research field. It is an important research field of colloid and interface science. Many kinds of ordered aggregation of amphiphilic surfactant have been considered the efficient “soft template” to prepare nanoparticles. In this article, different soft templates formed by sodium bis (2-ethylhexyl) sulf-osuccinate (AOT), nonyl phenol polyethyleneoxy ether (Oπ-10) and cetyltrimethyla- mmonium bromide (CTAB) were used to fabricate CaCO3, BaCO3 and CeO2/CuO nanoparticles with different morphology. After studying the transformation of the nanoparticles via changing surfactant style and concentration, we obtained the control theory. Furthermore, we discussed the effect of water pool, reaction time and concentration of reactant on the morphology of inorganic nanoparticles. In CTAB/cyclohexane/water reverse micelle, nanoparticles of CaCO3 and BaCO3 with special shape were synthesized through solvent hydrothermal method. In this article, we use CTAB as “soft template” to synthesize variety morphology of SnO2 nanoparticle in low temperature hydrothermal condition, and we discuss the effect concentration of CTAB on nanoparticles morphology and formation mechnism. Also, we synthesized PS/ZnO core-shell using soft and solid template separately. The products were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), infrared spectra (IR), Raman spectra (Raman) and X-ray diffraction (XRD).
- 【网络出版投稿人】 东北师范大学 【网络出版年期】2005年 04期
- 【分类号】TB383
- 【被引频次】8
- 【下载频次】1192