Preparation of bowl-like and eggshell-like hollow carbon microspheres from potato starch
2012
Zhao, Shuo | Li, Xiao-yuan | Wang, Cheng-Yang | Chen, Ming-Ming
Hollow carbon microspheres (HCS) were prepared from potato starch by ZnCl₂ activation. The morphology and surface areas of the HCS were studied by scanning electron microscopy and N₂ adsorption method, respectively. The results show that the HCS with bowl-like and eggshell-like structures are microporous materials. The preparation mechanism of the HCS was investigated by X-ray diffraction and thermogravimetric analysis. The results indicate that basic zinc chloride formed during impregnation decomposes into ZnO, HCl and H₂O. ZnO and HCl play an important role in the preparation of the HCS. Moreover, removal of ZnO grains by HCl washing contributes to the total surface areas of the HCS.
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