Mesostructural Evolution of Iron Oxide-SDS Composites: A TEM and PXRD Study

摘要

In present study, we synthesized iron oxide-sodium dodecyl sulfonate (SDS) composites by using a solvothermal route (ethyl alcohol-water) and demonstrated that the iron oxide-SDS composites undergo a mesostructural transition from lamellar to hexagonal as a function of ageing time. With increasing ageing time, the composite mesostructure evolved from a regular lamellar symmetry to a transitional mellar-hexagonal symmetry and eventually to an ordered hexagonal symmetry with a unit cell parameter of a = 44 A. The direct idences of mesostructural evolution were acquired from transmission electron microscopy and further confirmed by powder X-ray diffraction. A lamellar-to hexagonal transition mechanism was proposed to explain the mesostructural transition of iron oxide-SDS c imposites.