γ-Al2O3, hydrothermal method, hollow microspheres, urchin-like, crystal growth
Hierarchical urchin-like γ-Al2O3 hollow microspheres were prepared by a hydrothermal method followed by a calcination process using Al(NO3)3·9H2O as aluminum source, NH3·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 N2 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 m2/g and the average pore size is 11.42 nm, which have widely potential application such as catalyst, adsorption, and separation.
Tsinghua University Press
Qi LIANG, Xiaorui GUO, Tingting QUAN et al. P123 assisted synthesis and characterization of urchin-like γ-Al2O3 hollow microspheres. Journal of Advanced Ceramics 2016, 5(3): 225-231.