College of Materials Science and Engineering, Nanjing University of Technology, Jiangsu, Nanjing, People's Republic of China.
Bioinspir Biomim. 2010 Mar;5(1):16005. doi: 10.1088/1748-3182/5/1/016005. Epub 2010 Feb 25.
Monodispersed iron phosphate hollow microspheres with a high degree of crystallization were prepared through a facile in situ deposition method using rape pollen grains as a biotemplate. The functional group on the surface of the pollen grains could adsorb Fe(3+), which provided the nucleation sites for growth of iron phosphate nanoparticles. After being sintered at 600 degrees C for 10 h, the pollen grains were removed and iron phosphate hollow microspheres were obtained. A scanning electron microscope and x-ray diffraction were applied to characterize the morphology and crystalline structure of the pollen grains, iron phosphate-coated pollen grains and iron phosphate hollow microspheres. Differential scanning calorimetry and thermogravity analyses were performed to investigate the thermal behavior of the iron phosphate-coated pollen grains during the calcinations. Energy dispersive spectroscopy and Fourier transform infrared spectroscopy were utilized to investigate the interaction between the pollen grains and iron phosphate. The effect of the pollen wall on the surface morphology of these iron phosphate hollow microspheres was also proven in this work.
通过简便的原位沉积法，以油菜花粉粒为生物模板，制备了具有高度结晶度的单分散磷酸铁空心微球。花粉粒表面的官能团可以吸附 Fe(3+)，为磷酸铁纳米颗粒的生长提供了成核位点。在 600°C 下烧结 10 小时后，去除花粉粒，得到磷酸铁空心微球。采用扫描电子显微镜和 X 射线衍射对花粉粒、磷酸铁包覆花粉粒和磷酸铁空心微球的形貌和晶体结构进行了表征。通过差示扫描量热法和热重分析研究了磷酸铁包覆花粉粒在煅烧过程中的热行为。采用能谱和傅里叶变换红外光谱研究了花粉粒与磷酸铁之间的相互作用。本工作还证明了花粉壁对这些磷酸铁空心微球表面形貌的影响。
