Silica Nanotubes and Their Assembly Assisted by Boric Acid to Hierachical Mesostructures
Silica Nanotubes and Their Assembly Assisted by Boric Acid to Hierachical Mesostructures
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二氧化硅纳米管及其硼酸辅助组装成分级介观结构
DOI：
10.1021/la904851r
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发表时间：
2010-04-06
期刊：
影响因子：
3.9
通讯作者：
Ding, Weiping
中科院分区：
文献类型：
--
作者：
Ding, Shilei;Liu, Na;Ding, Weiping
精细控制硅物种的自组装成分级结构材料已经吸引了多年的研究关注。在模拟生物环境的弱酸性-碱性条件下，由这些过程产生的介观结构是当前研究的焦点。在本研究中，具有各种新颖的形貌，如介孔球，纳米管，和寡聚纳米管的介孔二氧化硅已经系统地合成，通过使用系统中的硼酸，这是精细控制的二氧化硅前驱体的组装的关键试剂。所制备的材料，其特征在于使用透射电子显微镜（TEM），小角X射线衍射（XRD），傅里叶变换红外（FT-IR）光谱，和氮吸附测量。研究结果支持了在硼酸存在条件下，SiO2与表面活性剂的纳米胶束的组装过程，由此产生的协同弱相互作用导致了SiO2的形貌演化。本研究为理解模拟生物硅化过程的介孔氧化硅形成条件提供了有效的信息。
Fine control of the self-assembly of silicon species to hierachical materials has attracted research attention for many years. The mesostructures produced by such processes tinder weak acidic-basic conditions mimic bioenvironments are the focus of current research. In this study, mesoporous silicas with various novel morphologies such as mesoporous spheres, nanotubes, and oligomeric nanotubes have been systematically synthesized by using boric acid in the system, which is the key reagent for the fine control of the assembly of the silica precursors. The as-prepared materials are characterized using transmission electron microscopy (TEM), small-angle X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and nitrogen sorption measurements. The results support the assembly process of the nanomicelle of silica and surfactant under the conditions of boric acid, from which the synergistic weak interactions cause the morphology evolution of silicas. The current research provides effective information for understanding the formation of mesoporous silica tinder conditions mimicking biosilification processes.