Formation mechanism of nano- and meso-scale integrated ordered structure using molecular assemblies as template

1.纳米单元结构的形成机理1-1纳米二氧化硅结构的形成机理在月桂胺盐酸盐/正硅酸乙酯体系中，通过改变模板反应体系中二氧化硅纳米结构的形成过程中的pH变化，合成了不同形貌的二氧化硅纳米结构。在pH值为10~11.5.1-2的范围内，二氧化钛纳米管的形成机理为六方有序结构。模板法制备了高度光催化的锐钛矿型纳米管。以非晶相的形式合成了二氧化钛纳米管，并在80℃下晶化3d。结果表明：1.随着晶化的进行，材料的孔径变大。阐明有机相与水相间二氧化硅液液界面完整有序结构的形成机理，对于形成pH为10~11.5的二氧化硅完整有序结构具有重要意义。在pH 10.5的条件下，用同步加速器轨道辐射的高功率X射线对8号春的小角X射线散射仪每秒每秒测量了有序结构的形成过程。我们发现，在液-液界面处首先形成独立的圆柱体，然后在界面的二维空间上相互聚集，形成二维和三维的整体有序结构。

1. Formation mechanism of nano-size unit structure1-1 Formation mechanism of nano-size silica structureVarious morphologies of microstructure were synthesized by pH variation in silica nano-structure formation by templating mechanism in laurylamine hydrochloride/tetraethoxysilane system. Integrated ordered structure such as hexagonal array was formed in the narrow pH region from 10 to 11.5.1-2 Formation mechanism of titania anotubesHighly photocatalytic single crystalline anatase titania nanotubes can be synthesized by templating mechanism in laurylamine hydrochloride/tetraisopropylorthotitanate modified with acetylacetone. Titania nanotubes were synthesized as amorphous phase and were crystallized in the rection process at 80 ℃ for 3days. The pore-size became large with proceeding crystallization.2. Elucidation of formation mechanism of the integrated ordered structure of silica Liquid-liquid interface between the organic and aqueous phases played an essential role for the formation of integrated ordered structure of silica at pH 10 to 11.5. The formation processes of integrated ordered structure in a few minutes at pH 10.5 were measured in every second by small angle X-ray scattering using syncrotron orbit radiation high power X-ray at SPring 8. We found that independent cylinders were formed first at the liquid-liquid interface and gathered with each other on the two-dimensional space of the interface to make an two- and three-dimensional integrated ordered structure.