Preparation And Characterization Of Multifunctional Nanomaterials

Low-dimensional nanostructures, have attracted a great deal of attention for their unique physical and chemical properties and more extensive potential applications in various fields. Among them, vanadium oxides with different nanostructure were considered as one of the most important nanomaterials due to theirs applications in catalysts,chemical sensors and electrical transportation. They were regarded as an ideal system on the research of physical and chemical phenomenon in low-dimensional field. The research on the structure and property of vanadium oxide nanotubes,nanowires,and nanobelts were more and more thoroughly. There were also important topic in current research filed for many researchers to synthesize rare-earth borate compounds with nanostructure due to theirs luminescence and catalytic properties.A facile chemical method which had been reported were futher to developled based on analyzing the synthesized method and characterization technique. Vanadium oxide nanomaterials and rare-earth borate nanotubes were fabricated by controllable synthesized method under suitable hydrothermal method at low temperature. These nanostructure were characterized by XRD,SEM,TEM,HRTEM,IR specta,BET and TG-DTA. The main contens were as following.Hydrothermal method has been employed to fabricated the nanowires and nanobelts of vanadium oxides in NH4VO3 solution by adjusting and controlling the reaction conditions with the assistance of surfactants. The reaction factors and reaction process were further studied.Consulted the previously investigation, we noticed that amine played an important role in the procedure of NTs-VOx·nH2O fabrication by hydrothermal method. Therefor, we added octadecylamine into NH4VO3- -Emulsifier OP-10 -water systems and finally multilayer vanadium oxides nanotubles were obtained. These structures of nanotubes were detailly characterized by HRTEM. At the same time, reaction factors,the reaction mechanism and structure of products were elucidated.we made a simple systhesis method that V2O5·nH2O nanowires were translated magnetic VO2·nH2O nanotubes under 180°C for 8h. The hysteresis graph was analysised.In addition, we made a try to fabricated hexagonal vanadium microncrystals. These vanadium microcrystals were characterized by TEM.The rare-earth borate compound nanotubes and bunchy nanotubes were successfully systhesized by hydrothermal method for the first time. We discussed the formation mechanism of nanotubes and bunchy nanotubes. YBO3 was one of the compound with vaterite structure, it has a tendency to growth flake in solution. The of nanotubes and bunchy nanotubes were obtained by controllable synthesized method under hydrothermal method with the assistance of surfactants. The as-prepared nanotubes and bunchy nanotubes were characterized by XRD, TEM,HRTEM,IR,BET and TG-DTA. It may provide an opportunity for studying physical or chemical properties and potential applications of and nanotubes bunchy nanotubes in future.