Synthesis Of Inorganic Micro-nanomaterials Via Microwave-assisted Ionic Liquid Route

In the demand of environmental protection and sustainable development,"Green chemistry"is the development trend. Room-temperature ionic liquids (RTLs) are organic salts with low melting points and also have many advantages, such as negligible vapor pressure, wide range of liquids temperatures, and large electrochemical window. Because of these properties, RTLs have a wide range of applications in catalysis, electrochemical, separation, organic synthesis, and iorganic synthesis. The ionic nature makes ionic liquid good solvent for absorbing microwave radiation. Microwave-assisted ionic liquid reaction systems have been studied for the synthesis of various nanostructures of inorganic materials.In this paper, ionic liquids had been used to synthesize novel structure of zinc hydroxide fluoride, zinc oxide, barium fluoride chlorine, barium fluoride, and calcium fluoride via an easy and fast microwave-assisted route. In the synthesis of zinc hydroxide fluoride, we performed experiments at different zinc acetate concentration, reaction time, and amount of ionic liquid to investigate their influence on the final products. The experiments results showed that the zinc acetate concentration is one of the most important influencing factors on the morphology of zinc hydroxide fluoride. In addition, we used microwave-assisted ionic liquid route and hydrothermal method to synthesis zinc oxide, and we got novel echinus-like structure of zinc oxide via hydrothermal method. In this paper, ionic liquids 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) was also used as reactant and template to synthesize metal fluorides (barium fluoride chlorine, barium fluoride, and calcium fluoride) via microwave-assisted route. The reactant concentration and solvents have important influence on the morphology of final products.The products were characterized by XRD, SEM, TEM, BET, UV-vis, PL, and we investigated the morphology variations with different reaction conditions. The possible formation mechanism was also discussed.