掠入射小角散射
X射线反射率
小角X射线散射
材料科学
化学工程
介孔材料
介孔二氧化硅
煅烧
硅酸钠
硅酸盐
散射
薄膜
小角中子散射
纳米技术
化学
中子散射
光学
复合材料
有机化学
物理
工程类
催化作用
作者
Andi Di,Julien Schmitt,Naomi Elstone,Thomas Arnold,Karen J. Edler
标识
DOI:10.1016/j.micromeso.2022.112018
摘要
An environmentally friendly and inexpensive silica source, sodium silicate solution, was applied to synthesize a free-standing mesoporous silica film at the air/liquid interface, exploiting the co-assembly of cetyltrimethylammonium bromide and polyethylenimine. The effect of the composition of the solution used for the film formation on the mesostructure of the as-synthesized silica films, characterized by small angle X-ray scattering (SAXS), was investigated. The initial film formation time is estimated by the change in surface pressure with time. Additionally, a possible formation process of the mesostructured silica film is proposed using data from in situ grazing incidence small angle X-ray scattering (GISAXS) and X-ray reflectivity (XRR) measurements. A free-standing film with a wormlike structure was formed at the interface and reorganized into a 2D hexagonal ordered structure while drying at room temperature, after removal from the air/solution interface. The ordered 2D hexagonal structure, however, could only be retained to some extent during calcination, in samples where nitrate ions are present in the film formation solution.
科研通智能强力驱动
Strongly Powered by AbleSci AI