| In this paper, preparation of hollow spheres with template method were studied. The samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray (EDX). The feasibility of most templates were investigated and the colloidal carbon spheres were confirmed as the best one. Then, the synthesis conditions were studied in detail and the best preparation technics of colloidal carbon spheres was determined. Alumina hollow spheres have been successfully prepared using colloidal carbon spheres as templates and the influences of the synthesis conditions such as reaction time, reaction temperature, and the concentration of A1(NO3)3 were studied. At last, the reaction mechanism of alumina hollows spheres preparation was discussesed.(1) In these technological conditions, the method of preparing alumina hollow spheres by CaCO3 and black carbon nanoparticals templates was infeasible. The results of the experiment indicated that there was no strong binding forces between alunima source and the templates.(2) The monodisperse and size-controlled colloidal carbon spheres were synthesized by hydrothermal method. The size can be controlled by changing the reaction time.(3) Novel size-tunable alumina hollow spheres have been successfully prepared using collciidal carbon spheres as templates and aluminum nitrate as alumina source. The results of the experiment indicated that, in comparison with the template, the samples had a serious shrinkage which was about 60% during the calcination process. Energy dispersive X-ray analysis illuminated that the samples was simple alumina and the X-ray diffraction analysis indicated that the alumina synthesized was amorphous. According to the experiment, the synthesized alumina hollow spheres with a narrow size distribution showed tunable shell thickness and uniform shells. The morphology of the alumina hollow spheres was influenced mainly by the reaction temperature.
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