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baiwanqiao

木虫 (正式写手)

[求助] 关于氧化石墨烯还原后处理的问题... 已有2人参与

将氧化石墨烯(GO)还原后再应该在么处理?怎么干燥?我看文献上许多都说离心水洗,试过离心,转速10000rpm,感觉离心不了,石墨烯还是均匀分散在水中。可不可以直接过滤干燥呀?
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baiwanqiao

木虫 (正式写手)

好像可以啊,这是我看到的一篇文献:Preparation 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℃  for 12 h yielded a black suspension of reduced graphene oxide platelets.
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7楼2012-10-22 13:13:17
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jin121

木虫 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
你应该把你还原GO的方法贴出来,让大家帮你分析一下,这样直接问,让别人很难回答,因为不同的还原方法,后处理都不一样
NeverGiveUp
2楼2012-09-12 13:02:27
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baiwanqiao

木虫 (正式写手)

还原方法:将200mg的氧化石墨烯分散于150mg水中,超声1h,再将NaBH4还原剂300g加入到分散液中搅拌半小时,将混合物加热到130℃,反应5小时,使GO完全转化成石墨烯,接下来该怎么处理还原后的石墨烯呢?
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3楼2012-09-12 14:45:57
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olea

专家顾问 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
转速可能低了点,lz做得多的话可以过滤,会损失一些
4楼2012-09-12 15:05:23
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