Preparation and characterization of hollow micro-spheres alumina carrier with honeycomb structure

Honeycomb structured Al₂O₃ have been prepared take advantage of the CO₂ generated by calcination, which escaped quickly and broke the shell wall of hollow spheres to form the honeycomb structure. The impact of preparation conditions of colloidal glucose carbon spheres on the properties of alumina carrier was studied. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM). The alumina crystal formation changed from amorphous structure into γ-Al₂O₃ as the calcination temperature increased. The integrity of structure can be controlled to be best when the calcination temperature is 500°C. When the concentration is 0.4 mol/L, the alumina has the largest specific surface, pore volume, and the pore diameter under the experimental conditions. The concentration has an optimum concentration range around 0.4 mol/L.