Superfine graphite powder was prepared by ball‐milling exfoliated graphite containing anhydrous CuCI2 in planetary ball milling systems. Nano‐scale CuCl2 graphite intercalation compounds were synthesized by heating a mixture of anhydrous CuCl2 and graphite nanosheets. Scanning electron microscopy, energy‐dispersive X‐ray spectroscopy and high‐resolution transmission electron microscopy were performed to characterize the microstructures of stage‐1 nano‐scale CuCI2 graphite intercalation compounds. The structure and components of the domain wall and core in the nano‐scale CuCl2 graphite intercalation compounds are described. The results show that the content of CuCl2 in the mixture plays a crucial role in the size of the nano‐scale CuCl2 graphite intercalation compound.
By loading nanometer anatase onto exfoliated graphite with the sol‐gel method, exfoliated graphite‐TiO2 composite (EG‐TiO2) can be prepared, which can adsorb oil and can also degrade oil. In a technologic condition for preparing EG‐TiO2, the impregnated number of times is the most important factor to influence oil‐adsorbing capability, that is, when the impregnated number of times increases, the amount of saturation‐adsorbed oil decreases. The study of EG‐TiO2 photocatalytic degradation of machine oil based on the weight‐loss method and infrared spectrum method indicates that EG‐TiO2 has obvious effect of photocatalytic degradation for machine oil. Its performance is superior to pure nanometer TiO2 powder because nanometer TiO2 in EG‐TiO2 has three‐dimension laminar structure and comparatively high adsorption capability.
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