Synthesis And Study Of Low Dimensional Nanomaterials At Low Temperature In Liquid Phase

The special function of nanomaterials has significant meaning not only in the development of science, but also in the application fields. It has provided an amplitude research field for new materials. It has been proved that the shape, size, and structure of low-dimensional nanomaterials affect their properties directly. So, the purpose of this article is, on the one hand, to explore novel methods to synthesize nanomaterials with controllable shapes and sizes, and on the other hand, to disclose the rule of nanomaterial microstructure, size change and shape evolution, in order to make further lab research and applications. We have successfully synthesized a series of hydroxides and oxides nanomaterials, and explored a new low temperature synthesis technique to realize the shape and size control during the synthesis process.1.) Using the solvothermal-assisted microemulsion system (cetyltrimethyammoniumbromide/ cyclohexayl/ 1-pentanol/water) we have successfully synthesized a series of phosphate nanostructures: SmPO4 nanorods and Sn (HPO4)2·H2O nanocrystals with flower shape. The influence of reaction parameters on nanosturure has been discussed in detail. What is more, we explored a mild and novel method to synthesize self-assembled hydroxideapatite flower-like nanostructures according to the polymerization of phosphoric acid. This method has several features: simple experiment setting, easy operation, and low energy assumption. 2) Through the combination of regular nonionic microemulsion and solvothermal systems we have obtained the shape-controllable PbXO4(X = Cr, W) nanorods. The diverse morphologies of PbXO4(X = Cr, W) nanocrystals could be obtained by adjusting concentration of reactants and the molar ratio of water and surfactant3) Using simple ligand-assisted methods, shuttle-like Eu(OH)3 nanocrystals have been obtained. Calcining this compound at 500?C for 10 hours leads to the formation of Eu2O3 nanocrystals with the same morphology. Hexagonal plate-shaped Co(OH)2 nanocrystals alsowere obtained through the combination of ligand-assisted and self-assembled methods. Using this compound as precursor we have further synthesized hexagonal plate-shaped LiCoO2 nanocrystals under hydrothermal conditions. In summary, a new method to synthesize nanomaterials through ligand-assisted low temperature solution has been explored. The virtues of this method are easy to operate.