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小木蟲(金幣+0.5):給個(gè)紅包，謝謝回帖
hljiang(金幣+15): 謝謝!我用1/4的量照做一次,如果成功再發(fā)薪水 2011-05-22 18:39:30
以下是我做過許多次的graphene oxide 的反應(yīng)流程，使graphene表面能修飾上許多含氧的基團(tuán)，包括-cooh,至于怎么得到C-N這個(gè)要靠自己去嘗試。
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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