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hljiang

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[交流] 请教graphene的表面修饰问题

请教各位,如何在graphene表面修饰上-COOH以及含N的官能团?

谢谢!
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javas2010

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小木虫(金币+0.5):给个红包,谢谢回帖
hljiang(金币+15): 谢谢!我用1/4的量照做一次,如果成功再发薪水 2011-05-22 18:39:30
以下是我做过许多次的graphene oxide 的反应流程,使graphene表面能修饰上许多含氧的基团,包括-cooh,至于怎么得到C-N这个要靠自己去尝试。
In a typical synthetic process,
natural graphite powder (2.0 g) was added to cooled (0 ◦C)  H2SO4 (350 ml). Then, KMnO4 (20 g) and NaNO3 (3 g) were added gradually while stirring. The mixture was then  transferred to a 30◦C water bath and stirred for 20 min. Deionized  water (250 ml) was slowly added and the temperature  was increased to 98 ◦C. The mixture was maintained at that  temperature for 30 min. The reaction was terminated by adding de-ionized water (500 ml) followed by adding H2O2 solution (40 ml, 30%). The color of the mixture changed to
brilliant yellow, indicating the oxidation of pristine graphite to  GO. Then, the mixture was filtered and washed with diluted HCl to remove metal ions. Finally, the product was washed repeatedly with distilled water until the pH was seven. The sample of GO was obtained after drying. To prepare the  GONS, the as-obtained GO was re-dispersed in distilled water。
6楼2011-05-22 18:00:34
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javas2010

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小木虫(金币+0.5):给个红包,谢谢回帖
金光闪闪2010(金币+1): hummer法 2011-05-22 19:18:23
在graphene 上接上-cooh 用经典的hummer法就可以,而接上-NH2 要用两步,先得到GS-COOH在通入氨气饱和即可。
2楼2011-05-21 19:51:38
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hljiang

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引用回帖:
Originally posted by javas2010 at 2011-05-21 19:51:38:
在graphene 上接上-cooh 用经典的hummer法就可以,而接上-NH2 要用两步,先得到GS-COOH在通入氨气饱和即可。

这位老兄做graphene是不是老手啊?能否email聊聊?
我想接N,不是-NH2,而是单纯的N,可以么?

接-COOH具体怎么弄呢?能否详细介绍一下啊?
3楼2011-05-22 08:41:48
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javas2010

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小木虫(金币+0.5):给个红包,谢谢回帖
做graphene 的用经典的强酸氧化法得到 graphene oxide 没接触过?

要回复记得留下金币!
4楼2011-05-22 15:16:15
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