Amphiphilic Molecules Assistant Synthesis Of Inorganic Salt Nanomaterials

In the past few years, the materials with nanometer scale have attracted much interest owing to their potential application in optical, conductive/superconductive, catalytic and biological applications. Therefore, manipulating the morphology and architecture of nanomaterials is always the study focus of scientist. Up to date, lots methods have been developed to fabricate nanomaterials, and in which the surfactant-assisted microemulsion system is an ideal reaction medium to the synthesis of nanomaterials. A variety of nanomaterials with different morphologies and uniform size have been prepared successfully with this kind of system.In this paper, by combinating the microemulsion method with solvothermal and incubating methods, multy morphologies of CaCO3 nanoparticles, such as sphere-like, plate-like, rod-like and belt-like, were obtained in a microemulsion sytem composed of cetyltrimethylammonium bromide (CTAB), water, cyclohexane, n-hexanol. The effects of W0, stirring time and incubating time on the morphology of the products were investigated.Then, by introducing alcohol into the system mentioned above, the shape of the micells changed, which resulted in the formation of lens-like and abacus bead-like CaCO3 microparticles at different reaction time, respectively. The as-obtained products were characterized by TTM and XRD.At last, microemulsion templates formed by sodium dodecyl sulfate (SDS), cetyltrimethyla- mmonium bromide (CTAB) and nonyl phenol polyethyleneoxy ether (OÏ€-10) , respectively , were used to fabricate CaWO4 nanoparticles with different morphology. The possible reaction mechanism was proposed and explained. The effect of water pool, concentration of reactant, solvothermal condition on the product morphology is also discribed.The products were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), and X-ray diffraction (XRD), fluorenscence spectrum.