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请教graphene的表面修饰问题
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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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2楼2011-05-21 19:51:38
3楼2011-05-22 08:41:48
4楼2011-05-22 15:16:15
5楼2011-05-22 16:02:19
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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
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
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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。 |
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