A novel yeast bio-template route to synthesize Cr2O3 hollow microspheres

作者：Bai Bo^*; Wang Pengpeng; Wu Le; Yang Li; Chen Zhihong

来源：Materials Chemistry and Physics, 2009, 114(1): 26-29.

DOI：10.1016/j.matchemphys.2008.10.030

• Oxides
• Microstructure
• Chemical synthesis

Chromium oxide (Cr2O3) hollow microspheres were successfully prepared by using spherical yeast as a natural bio-template and chromium chloride hexahydrate (CrCl3 center dot 6H(2)O) as chromium source, which involved the deposition of inorganic coatings on the surface of yeast cells and subsequent thermal dehydration. Various approaches including X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transformed infrared (Fr-IR) spectroscopy were used to characterize the intermediate and the final products. The results showed that the thermally treated samples were Cr2O3 hollow microspheres with a diameter varying between 2.5 mu m and 2.8 mu m. The possible mechanism for the formation of Cr2O3 hollow microspheres is proposed. This study provided a promising route for the preparation of a variety of hollow microspheres.

• 出版日期2009-3-15
• 单位长安大学; 华东理工大学