Research On The Synthesis Of Micro-nanomaterials In The Ionic Liquids

As a new solvent, room-temperature ionic liquids (RTILs) have been widely used in the organic chemical reactions, separations, and electrochemical due to their negligible vapor pressure, low melting points, wide range of liquid temperatures (up to 400℃), low toxicity, non-flammability, large electrochemical window, good solvents for many organic and inorganic materials, high ionic conductively and thermal stability. In contrast to their successful applications in organic and materials chemistry, the use of RTILs in micro-nanostructres synthesis is still in its infancy,but the excellences have brought more attention of scientist .In this paper, we synthesized different RTILs, and then used the RTILs to synthesize various micro-nanomaterials. Heating by microwave can accelerate the reaction evidently, and the polarization of ions under the rapidly changing electric field of the microwave results in anisotropic growth of crystals. The RTILs consists of cation and anion, and the high ionic conductivity and polarizability of cation make it an excellent microwave absorbing agent, thus leading to a high heating rate and a significantly shorten reaction time. By combining the advantages of both RTILs and microwave heating, we report a fast, seedless, template-free and environmentally benign green route to synthesis micro-nanostructures. Here, we synthesized various morphologies of hydroxide, oxide in the solution and obtained fine crystallization sulfide in the solid state reaction. In addition, we synthesized mesostructured TiO2 using sol-gel method in different RTILs.The products were characterized by XRD, SEM, TEM, PL, and we investigated the morphology variations of nanostructures with different conditions. The possible formation mechanism was also discussed.