| ²é¿´: 2002 | »Ø¸´: 13 | ||||
ÐùÔ¯ÄþÄþÒø³æ (СÓÐÃûÆø)
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| ǰ¼¸Ìì¿´µ½ÎÄÏ×½éÉÜ˵¿ÉÒÔÓó¬Áٽ編´Óʯīֱ½ÓÖÆ±¸Ê¯Ä«Ï©£¬¾õµÃÕâ¸ö·½·¨ºÜ¼òµ¥£¬Ïë³¢ÊÔÏ£¬µ«²»ÖªµÀÕâ¶ÔÉ豸ʲôµÄÓÐûÓÐÌØÊâÒªÇó£¿ÏëÇóÖú¸÷λ´óʦ°ïæ½â´ðÏ£¬²¢Ï£ÍûÄܶԻúÀí½øÐмòµ¥ÃèÊö¡£Ï¸½Ó¢ÎÄʵÑé·½·¨ÔÎÄ¡£Commercial powdered natural graphite was used as our starting material. The commercial graphite has a particle size of ~70 ¦Ìm with a purity of 99.99995% and a density of 2.25 g/cm3. One gram of graphite was placed in a high-pressure vessel with a heater and a temperature controller. CO2 was then added into the vessel until the pressure reached 100 b. Heat was applied to the vessel so that the temperature of the vesselwas kept at 45 ¡ãC. The graphitewas immersed in the supercritical fluid for 30 min. |
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