Abstract
Hollow cerium dioxide structures (HCSs) were prepared by a simple manufacturing method using Ceiba pentandra (L.) Gaertn. (kapok) fibers as a natural biomass template. The heat decomposition of the kapok template and the subsequent formation of a nanocrystalline phase of CeO2 in HCSs were studied by thermal gravimetric analysis and X-ray diffraction. The uniform morphology of the obtained HCSs with a diameter of 10–15μm was investigated by field-emission scanning electron microscopy. Despite the micrometer size of the HCSs, the walls had a high specific surface area and mesopores that were well developed, as determined by N2 gas adsorption–desorption analysis. Further, X-ray diffraction analysis revealed that the formation of HCSs was largely influenced by the calcination temperature.
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