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zhaoyueer

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专业: 无机合成和制备化学

[求助] 这几天在做氧化石墨烯的制备实验求助已有4人参与

我加了双氧水之后变成黄色，之后改怎么做呢。我看到有的文章上面说趁热过滤还有的是离心洗涤，问一下做过的大神该怎么做。

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1楼 2015-12-29 21:52:00

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

等你来我就

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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.

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