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zelatan木虫 (著名写手)
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【讨论】这样做氧化石墨烯能做出来吗？ 已有21人参与
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以下是摘自ACS Appl. Mater. Interfaces中一篇文献 Preparation of Graphene Oxide and Its Exfoliated Suspension. A modified Hummers method was utilized to synthesize oxidized graphite powder (25). Typically, 2.5 g of natural graphite, 2.5 g of NaNO3, and 7.5 g of KMnO4 were slowly added to 50 mL of concentrated H2SO4 under vigorous stirring below 5 °C. Then the mixture was stirred continuously for 1 h at 35 °C to oxidize the graphite. After that, 100 mL water was added into the mixture, and the temperature was increased to higher than 90 °C, and the suspension was maintained at 95-100 °C for 15 min. Then, the mixture was poured into 300 mL of deionized water, after that 20 mL of H2O2 was added into the suspension. After cooling to room temperature, the solid products were filtered, subsequently washed with 5% HCl aqueous solution and water, and finally dried to obtain graphite oxide. The obtained graphite oxide was dispersed in DMF (1.0 mg mL-1) by ultrasonication treatment by using an ultrasonication bath cleaner for 3 h. The resulting exfoliated GO suspension was centrifuged at 2000 rpm for 5 min to remove the unexfoliated graphite oxide particles. 看了一下，大概连一天都不用 就可以做成氧化石墨烯了，和论坛里大家用的Hummers method 相比快了不少啊。 有经验的虫子看一下这样可以做出来吗？ 有没有哪些步骤不合适啊？ |
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2楼2010-12-12 11:43:34
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