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baiwanqiao
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ºÃÏñ¿ÉÒÔ°¡£¬ÕâÊÇÎÒ¿´µ½µÄһƪÎÄÏ×£ºPreparation of a batch of a colloidal suspension of reduced graphene oxide Graphite oxide (GO) was synthesized from natural graphite(SP-1, Bay Carbon, MI) by the modified Hummers method. A colloidal suspension of graphene oxide platelets in puri-fied water (50 mg of GO, 3 mg/ml) was prepared in a 250 ml flask with 2 h of bath ultrasound (VWR B2500A-MT). A sus-pension of graphene oxide in the H2O/N,N -dimethylformam-ide (DMF) solvent mixture was obtained by addition of DMF(volume ratio of DMF:H2O = 9:1) into the aqueous grapheneoxide suspensions. Hydrazine monohydrate (1 l l per 3 mg ofGO) (98%, Aldrich) was subsequently added to the suspension. Additional stirring with a Teflon-coated stirring bar at 80¡æ for 12 h yielded a black suspension of reduced graphene oxide platelets. |

7Â¥2012-10-22 13:13:17
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2Â¥2012-09-12 13:02:27
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3Â¥2012-09-12 14:45:57
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4Â¥2012-09-12 15:05:23













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