Hierarchical urchin-like gamma-Al2O3 hollow microspheres were prepared by a hydrothermal method followed by a calcination process using Al(NO3)(3)center dot 9H(2)O as aluminum source, NH3 center dot H2O as precipitati...Hierarchical urchin-like gamma-Al2O3 hollow microspheres were prepared by a hydrothermal method followed by a calcination process using Al(NO3)(3)center dot 9H(2)O as aluminum source, NH3 center dot H2O as precipitating agent, and P123 as structure-directing agent (SDA). The obtained samples were investigated using X-ray diffraction (XRD), filed emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and N-2 adsorption/desorption. The influences of P123 concentration, acidic condition, and hydrothermal time on the morphology of product were discussed. P123 has a great influence on ruling the oriented attachment of nanowires and stabilizing the superstructure in the self-assembly process. The 3D urchin-like hollow microspheres have a surface area of 210.2 m(2)/g and the average pore size is 11.42 nm, which have widely potential application such as catalyst, adsorption, and separation.展开更多
基金This work was financially supported by National Natural Science Foundation of China，State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
文摘Hierarchical urchin-like gamma-Al2O3 hollow microspheres were prepared by a hydrothermal method followed by a calcination process using Al(NO3)(3)center dot 9H(2)O as aluminum source, NH3 center dot H2O as precipitating agent, and P123 as structure-directing agent (SDA). The obtained samples were investigated using X-ray diffraction (XRD), filed emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and N-2 adsorption/desorption. The influences of P123 concentration, acidic condition, and hydrothermal time on the morphology of product were discussed. P123 has a great influence on ruling the oriented attachment of nanowires and stabilizing the superstructure in the self-assembly process. The 3D urchin-like hollow microspheres have a surface area of 210.2 m(2)/g and the average pore size is 11.42 nm, which have widely potential application such as catalyst, adsorption, and separation.
