| In the 21st century, the functional materials have been received extensive attention due to their unique properties. In this thesis, hydroxyapatite (HA), magnetic hydroxyapatite (Fe2O3@HA), and magnetic metal organic framework (Au-Fe304@Tb-BTC) were prepared. In the meantime, we study the properties of removal of heavy metal ion, drug loading and fluorescent indicator. The details are as the followings:Based on the synthesis of hydroxyapatite (HA) with different morphologies and structures, such as nanorod-like, nanorod-assembled flower-like and nanorod-assembled sphere-like HA, a new strategy has been developed for the removal of heavy metal ions such as Pb2+, Cu+, Mn2+, Zn2+. The dependence of capture efficiency on the morphology and the suspended concentration of trapping agent, the removal time, and capture selectivity was evaluated and discussed. Then the correlation the XRD, FT-IR, Raman, XPS and ICP-AES results show that some metal ions were completely incorporated into the hydroxyapatitie to produce Pb-HA. It reveals that the metal ions captured by HA are mainly controlled by sample surface adsorption and co-precipitation, which are directly controlled by sample morphology.Nano-MIL-53(Fe) crystals with monodispersed spherical structures were rapidly synthesized by microwave-assisted method. Then, HA-coated MIL-53(Fe) nanocrystals were also successfully obtained via hydrothermal method. After calcination, magnetic porous particles Fe2O3@HA were achieved. The morphology and structure of the as-synthesized magnetic porous particles were detected by XRD, SEM and TEM. Furthermore, we investigated the loaded and slow release property for ibuprofen. Then the incorporation of the drug ibuprofen into the Fe2O3@HA was around 25.6% per gram of Fe2O3@HA. Ibuprofen is released in a highly controlled and progressive fashion with 92.0% of the drug after 120 h. The result from this work provides a new avenue to be used as potential drug delivery.Novel magnetic Au@Fe3O4@Tb-BTC nanospheres with core-shell structures were prepared by a simple step by step assembly strategy. The morphology and structure of as-synthesized magnetic porous particles were detected by XRD, SEM and TEM. Additionally, Au@Fe3O4@Tb-BTC is found to be useful as a fluorescent indicator for quantitative detection of nitroaromatic explosives with different numbers of -NO2 groups, and the values of Ksv are about 9490M-1,10439M-1,13372M-1, 39177M-1,50866M-1,60244M-1 and 148431 M-1 for NB,4-NT,2-NT,2,6-DNT, PA, 2,4-DNT and TNT, respectively. Meanwhile, Au@Fe3O4@Tb-BTC displays high selectivity and recyclability in the detection of nitroaromatic explosives. Besides, the Au@Fe3O4@Tb-BTC magnetic nanospheres can be easily recycled, which makes it more convenient for reutilization and more friendly to the environment. |
